Comments, if any, may please be made in the format as given overleaf and mailed to the undersigned at the above address.

Transcription

1 DRAFT IN WIDE CIRCULATION DOCUMENT DESPATCH ADVICE Refrigeration and Air Conditioning Sectional Committee, MED 3 1) All Members of Mechanical Engineering Division Council 2) All Members of Refrigeration and Air Conditioning Sectional Committee, MED 3 3) All other interested members Dear Sirs, Please find enclosed the following document: Ref. Date MED 3 /T Doc No. MED 03 (12795) Title Testing and calculating methods for seasonal performance factors of air-cooled air conditioners and air-to-air heat pumps : Part 1 Cooling seasonal performance factor Kindly examine the draft standard and forward your views, stating any difficulties which you are likely to experience in your business or profession, if this is finally adopted as National Standard. Last date for comments: Comments, if any, may please be made in the format as given overleaf and mailed to the undersigned at the above address. In case no comments are received or comments received are of editorial nature, you will kindly permit us to presume your approval for the above document as finalized. However, in case of comments of technical in nature are received then it may be finalized either in consultation with the Chairman, Sectional Committee or referred to the Sectional committee for further necessary action if so desired by the Chairman, Sectional Committee. This documentis also hosted on BIS website www@bis.org.in. Thanking you, Yours faithfully, Encl.: As above (Rajneesh Khosla) Sc `E & Head (MED) 1

2 य पक प रच लन मस द श तन और एयर क ड श नग वषय स म त, एमईड 3 ष त : 1 य क इ ज नयर वभ ग प र षद क सभ सद य 2 श तन और एयर क ड श नग वषय स म त, एमईड 3 क सभ सद य 3 च रखन व ल अ य नक य मह दय, न न ल खत म नक क मस द सल न ह: स दभ दन क एमईड 3/ट ल ख स य एमईड 03 (12795) श षक व य -श तत व त न क लक और व य -स -व य ऊ म प प क म सम क यक रत क रक क लए पर ण एव गणन करन क व धय :भ ग 1 श तलन म सम क यक रत क रक क पय इस मस द क अवल कन कर और अपन स म तय यह बत त ए भ ज क अ तत: य द यह म नक र य म नक क प म क शत ह ज त इन पर अमल करन म आपक यवस य अथव क र ब र म य क ठन ईय आ सकत ह स म तय भ जन क अ तम त थ स म त य द क ई ह त क पय अध ह त र क उपर ल खत पत पर सल न फ मट म भ ल य ईम ल कर द य द क ई स म त त नह ह त ह अथव स म त म क वल भ ष स बध ट ई त उपर त ल ख क यथ वत अ तम प दय ज य ग य द क ई स म त तकन क क त क ई त वषय स म त क अ य क पर मश स अथव उनक इ छ पर आग क क यव ह क लए वषय स म त क भ ज ज न क ब द ल ख क अ तम प द दय ज एग यह ल ख भ रत य म नक य र क व बस इट www@bis.org.inपर भ उपल ध ह ध यव द, भवद य, स न : उपर ल खत व नक `ई एव म ख (एमईड ) (रजन श ख सल ) 2

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4 For Comments Only Bureau of Indian Standards व य -श त व न क लक औरव य -स -व य ऊष म प प क म सम क यक रर क रक क तलएपर क षणएव गणन करन क तवत य : भ ग1 श लनम सम क यक रर क रक Draft Indian Standard TESTING AND CALCULATING METHODS FOR SEASONAL PERFORMANCE FACTORS OF AIR-COOLED AIR CONDITIONERS AND AIR-TO-AIR HEAT PUMPS PART 1: COOLING SEASONAL PERFORMANCE FACTOR ICS23.120; Not to be reproduced without the permission of Last date for receipt of BIS or used as a STANDARD comments is 12Feb 2019 FOREWORD (Formal clause will be added later) This Standard (Part 1) specifies the testing and calculating methods for seasonal performance factor of equipment covered by IS 1391 (Part 1) and (Part 2). While IS 1391(Part 1) and (Part 2) covers the energy efficiency requirement for fixed capacity airconditioners.this standard prescribes the determination of seasonal efficienciesbecause they provide a better indication of efficiency under actual operating conditions. This standard consists of the following parts under the general title Air-cooled air conditioners and air-toair heatpumpstesting and calculating methods for seasonal performance factors: Part 1: Cooling seasonal performance factor Part 2: Heating seasonal performance factor (to be taken up later) Part 3: Annual performance factor (to be taken up later) This standard is based on ISO Testing and calculating methods for seasonal performance factors of air-cooled air conditioners and air-to-air heat pumps Part 1: cooling seasonal performance factor except for the following: a) Bin hours has been modified to take into consideration Indian condition b) Bin temperature has been modified based on ambient temperature prevailing pan India For the purpose of deciding whether a particular requirement of this standard is complied with the final value observed or calculated expressing the result of a test shall be rounded off in accordance with IS 2: 1

5 1960 Rules for rounding off numerical values (revised). The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard. 2

6 Contents 1 Scope 2 References 3 Terminology 4 Symbols 5 Tests 5.1 General 5.2 Test conditions 5.3 Test methods 6 Calculations 6.1 Cooling seasonal performance factor (CSPF) and total cooling seasonal performance factor (TCSPF) 6.2 Defined cooling load 6.3 Outdoor temperature bin distribution for cooling 6.4 Cooling seasonal characteristics of fixed capacity units 6.5 Cooling seasonal characteristics of two-stage capacity units 6.6 Cooling seasonal characteristics of multi-stage capacity units 6.7 Cooling seasonal characteristics of variable capacity units 7 Test report Annex A Annex B Annex C Annex D Annex E Figures Calculation of total cooling seasonal performance factor (TCSPF) Testing and calculation method for degradation coefficient ofcyclic operation Calculating method for seasonal performance factor when setting aspecific cooling load Calculating method for temperature when defined load line crosses eachcapacity line 3

7 BUREAU OF INDIAN STANDARDS DRAFT FOR COMMENTS ONLY (Not to be reproduced without the permission of BIS or used as a STANDARD TESTING AND CALCULATING METHODS FOR SEASONAL PERFORMANCE FACTORS OF AIR-COOLED AIR CONDITIONERS AND AIR-TO-AIR HEAT PUMPS PART 1: COOLING SEASONAL PERFORMANCE FACTOR 1 SCOPE 1.1 This Standard (Part 1) specifies the testing and calculating methods for seasonal performance factor of equipment covered by IS 1391 (Part 1) and (Part 2), IS This Standard also specifies the seasonal performance test conditions and the corresponding test procedures for determining the seasonal performance factor of equipment as specified in 1.1 under mandatory test conditions and is intended for use only in marking comparison and certification purposes. For the purposes of this standard the rating conditions are those specified under T1 in the reference standards as specified in 1.1. This standard s procedures may be used for other temperature conditions. 1.3 This Standard does not apply to the testing and rating of: a) water-source heat pumps or water-cooled air conditioners; b) portable units having a condenser exhaust duct; c) individual assemblies not constituting a complete refrigeration system; or d) equipment using the absorption refrigeration cycle. 2 REFERENCES The following Indian standards are necessary adjunct to this standard and contain provisions which through reference in this text, constitute provisions of the standards. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the Standards indicated below: IS No. Title 1391 (Part 1): 2017 Room air conditioners Specifications: Part 1 Unitary air conditioners 1391 (Part 2): 2018 Room air conditioners Specifications: Part 2 Split air conditioners 8148:2018 Packaged Air Conditioners 4

8 3 TERMINOLOGY For the purposes of this Standard the following definitions in addition to those given in IS 1391 (Part 1 and 2), IS 8148 and IS/ISO (under preparation) shall apply: 3.1 Defined Cooling Load (L c ) The heat defined as cooling demand for a given outdoor temperature 3.2 Cooling Seasonal Total Load (CSTL) Total annual amount of heat that is removed from the indoor air when the equipment is operated forcooling in active mode 3.3 Cooling Seasonal Energy Consumption (CESC) Total annual amount of energy consumed by the equipment when it is operated for cooling in active mode 3.4 Cooling Seasonal Performance Factor (CSPF) Ratio of the total annual amount of heat that the equipment can remove from the indoor air when operated for cooling in active mode to the total annual amount of energy consumed by the equipment during the same period 3.5 Part Load Factor (PLF) Ratio of the performance when the equipment is cyclically operated to the performance when the equipment is continuously operated at the same temperature and humidity conditions 3.6 Degradation Coefficient (C D ) Coefficient that indicates efficiency loss caused by cyclic operation 3.7 Fixed Capacity Unit Equipment which does not have possibility to change its capacity. This definition applies to each cooling and heating operation individually. 3.8 Two -Stage Capacity Unit Equipment where the capacity is varied by no more than two steps. This definition applies to each cooling and heating operation individually. 3.9 Multi-Stage Capacity Unit Equipment where the capacity is varied by 3 or 4 steps. This definition applies to each cooling and heating operation individually. 5

9 3.10 Variable Capacity Unit Equipment where the capacity is varied by 5 or more steps to represent continuously variable capacity. This definition applies to each cooling and heating operation individually Cooling Full-Load Operation Operation with the equipment and controls configured for the maximum continuous refrigeration capacity specified by the manufacturer and allowed by the unit controls. Unless otherwise regulated by the automatic controls of the equipment, all indoor units and compressors shall be functioning during the fullload operation Minimum-Load Operation Operation of the equipment and controls at minimum continuous refrigeration capacity. All indoor units shall be functioning during the minimum-load operation 3.13 Standard Cooling Full Capacity Cooling capacity at T1 at full-load operating conditions 3.14 Standard Cooling Full Power Input Electric power input at T1 at full-load operating conditions 3.15 Standard Cooling Half Capacity Capacity which is 50 percent of cooling full capacity at the T1 condition with all indoor units functioning 3.16 Standard Cooling Half Power Input Electric power input when operated at 50 percent of cooling full capacity at T1 condition with all indoor units functioning 3.17 Standard Cooling Minimum Capacity Capacity at T1 condition at the minimum-load operation 3.18 Standard Cooling Minimum Power Input Electric power input at T1 condition at the minimum-load operation 3.19 Total Cooling Seasonal Performance Factor (TCSPF) Ratio of the total annual amount of heat that the equipment can remove from the indoor air to the total annual amount of energy consumed by the equipment including the active, inactive and disconnected modes 3.20 Active Mode The mode corresponding to the hours with a cooling demand of the building and whereby the cooling 6

10 function of the unit is switched on 3.21 Inactive Mode The mode corresponding to the hours when the unit is not operating to meet cooling demand NOTE -This mode may include the operation of a crankcase heater Disconnected Mode The mode corresponding to the hours when the unit is electrically disconnected from the main power supply NOTE-Power consumption is zero. 4 SYMBOLS OF EQUATIONS Symbol Description Unit C CSE cooling seasonal energy consumption (CSEC) Wh E ER (t) energy efficiency ratio (EER) at continuous outdoor temperature t W/W EER, haf(tc) energy efficiency ratio (EER) when cooling load is equal to cooling half capacity W/W EER, hf(tj) energy efficiency ratio (EER) in variable operation between half and full capacity at outdoor temperature tj W/W EER, mh(tj) EER,min(tp) energy efficiency ratio (EER) in variable operation between minimum and halfcapacity at outdoor temperature tj energy efficiency ratio (EER) when cooling load is equal to cooling minimumcapacity FCSP cooling seasonal performance factor (CSPF) FPL(tj) part load factor (PLF) at outdoor temperature tj FTCSP total cooling seasonal performance factor (TCSPF) LCST cooling seasonal total load (CSTL) Wh Lc(tj) defined cooling load at outdoor temperature tj W nj bin hours h k, p, n, m number of temperature bins P(t) cooling power input calculated by equation of P(tj) at continuous outdoor W temperature t P(tj) cooling power input applicable to any capacity at outdoor temperature tj W Pful(tj) cooling full power input at outdoor temperature tj W Pful(29) cooling full power input at outdoor temperature 29 C W Phaf(tj) cooling half power input at outdoor temperature tj W Phaf(35) cooling half power input at T1 temperature condition W Phaf(29) cooling half power input at outdoor temperature 29 C W W/W W/W 7

11 Phf(tj) cooling power input in variable operation between half and full capacity W atoutdoor temperature tj 5 Pmf(tj) cooling power input in second stage cyclic operation between minimum W andfull capacity at outdoor temperature tj Pmh(tj) cooling power input in variable operation between minimum and half W capacity Pmin(tj) cooling minimum power input at outdoor temperature tj W Pmin(35) cooling minimum power input at T1 temperature condition W Pmin(29) cooling minimum power input at outdoor temperature 29 C W t general continuous outdoor temperature C tj outdoor temperature corresponding to each temperature bin C tb outdoor temperature when cooling load is equal to cooling full capacity C tc outdoor temperature when cooling load is equal to cooling half capacity C tp outdoor temperature when cooling load is equal to cooling minimum C X(tj) ratio of load to capacity at outdoor temperature tj - Xhf(tj) ratio of excess capacity over load to capacity difference between half and fullcapacity at outdoor temperature tj - Xmf(tj) ratio of excess capacity over load to capacity difference between minimum - andfull capacity at outdoor temperature tj Xmh(tj) ratio of excess capacity over load to capacity difference between minimum - andhalf capacity at outdoor temperature tj ϕ(t) cooling capacity calculated by equation of ϕ(tj) at continuous outdoor W temperature ϕ(tj) cooling capacity applicable to any capacity at outdoor temperature tj W ϕful(tj) cooling full capacity at outdoor temperature tj W ϕful(35) cooling full capacity at T1 temperature condition W ϕful(29) cooling full capacity at outdoor temperature 29 C W ϕhaf(tj) cooling half capacity at outdoor temperature tj W ϕhaf(35) cooling half capacity at T1 temperature condition W ϕhaf(29) cooling half capacity at outdoor temperature 29 C W ϕmin(tj) cooling minimum capacity at outdoor temperature tj W ϕmin(35)wil cooling minimum capacity at T1 temperature condition ϕmin(29) cooling minimum capacity at outdoor temperature 29 C W IS/ISO (Under preparation). The accuracy of the instruments used for tests shall conform to the test methods and uncertainties of measurements specified in 1391 (Part 1 and 2), IS 8148 and IS/ISO (Under preparation). 5.2 Test Conditions Temperature and humidity conditions as well as default values for calculation shall be specified in Table 1. Table 1 8 W TE ST S 5.1 Ge ner al The se test s are add itio nal to tho se giv en in IS (Pa rt 1 and 2), IS and

12 Test Temperature and Humidity Conditions and Default Values for Cooling at T1 Moderate Climate Condition indicates required test. indicates optional test Characteristics Fixed Twostage Multistage Variable Default value Standard cooling Capacity Full capacity ϕful(35)(w) Full power input Pful(35)(W) Indoor DB27 C WB 19 C Outdoor DB35 C WB 24 C Half capacity ϕhaf(35)(w) Half power input Phaf(35)(W) Minimum capacity ϕmin(35)(w) Minimum power input Pmin(35)(W) ϕhaf(29)/1,077 Phaf(29)/0,914 ϕmin(29)/1,077 Pmin(29)/0,914 Low temperature cooling capacity Full capacity ϕful(29)(w) xφful(35) Full power input Pful(29)(W) 0.914xPful(35) Indoor DB 27 C WB 19 C Half capacity ϕhaf(29)(w) Half power input Phaf(29)(W) _ xφhaf(35) 0.914xPhaf(35) Outdoor Minimum capacity ϕmin(29) (W) DB 29 C WB 19 C Minimum power input Pmin(29) (W) - NOTES: 1. If the minimum capacity test is measured, min(29) test is conducted first. Min(35) test may be measured or may be calculated by using default value. 2. Voltage(s) and frequency(ies) are as given in the three referenced standards Test Methods Standard Cooling Capacity Tests The standard cooling capacity tests shall be conducted in accordance with IS 1391 (Part 1 and 2), IS 8148 and IS/ISO (Under preparation) as applicable. The cooling capacity and effective power input shall be measured during the standard cooling capacity tests. The half capacity test shall be conducted at 50 percent of full load operation. The test tolerance shall be ± 5 percent of full load capacity for continuously variable equipment. For multi-stage equipment. If 50 percent capacity is not achievable, then the tests shall be conducted at the next step above 50 percent. The minimum capacity test shall be conducted at the lowest capacity control setting which allows steady state operation of the equipment at the given test conditions. If the minimum capacity tests are conducted, but if the required uncertainty of measurement specifiedin IS 1391 (Part 1 and 2), IS 8148 and IS/ISO (Under preparation) cannot be achieved, the alternative method of calculation shall beused (see6.6.4 and 6.7.4). 9

13 The manufacturer shall provide information on how to set the capacity if requested by the testing laboratories Low Temperature Cooling Capacity Tests The low temperature cooling capacity test shall be conducted in accordance with IS 1391 (Part 1 and 2), IS 8148 and IS/ISO (Under preparation). If the test is not conducted, default values as given in Table 1 shall be used. The half capacity test shall be conducted at 50 % of full load operation. The test tolerance shall be ± 5 %of full load capacity for continuously variable equipment. For multi-stage equipment, if 50 % capacity isnot achievable, then the tests shall be conducted at the next step above 50 %. The minimum capacity test shall be conducted at the lowest capacity control setting which allowssteadystate operation of the equipment at the given test conditions. If the minimum capacity tests are conducted, but if the required uncertainty of measurement specified in IS 1391 (Part 1 and 2), IS 8148 and IS/ISO (Under preparation) cannot be achieved, the alternative method of calculation shall be used (see and 6.7.4). The manufacturer shall provide information on how to set the capacity if requested by the testinglaboratories Low Humidity Cooling Test and Cyclic Cooling Test The low humidity cooling test and cyclic cooling test shall be conducted in accordance with Annex C. If the test is not conducted, default values as given in Table 1 shall be used. 6 CALCULATIONS 6.1 Cooling Seasonal Performance Factor (CSPF) and Total Cooling Seasonal Performance Factor (TCSPF) The cooling seasonal performance factor (CSPF), FCSP, of the equipment shall be calculated by using the equation (1) below. F csp = L cst C cse (1) In case of calculating the total cooling seasonal performance factor (TCSPF), refer to Annex B. 6.2 Defined Cooling Load The defined cooling load shall be represented by a value and the assumption that it is linearly changing depending on the change in outdoor temperature. Defined cooling load which shall be used is shown in Table 2. Table 2 Defined cooling load 10

14 Parameter Load zero (0) Load 100% Cooling load (W) 0 ful (t 100 ) Temperature in (C) t 0 t 100 Where,t 100 is the outdoor temperature at 100 percent load and t 0 is the outdoor temperature at 0 percent load. Reference values of defined cooling load to be used shall be as follows: t 0 = 23 C and t 100 = 43 C In case of setting other cooling load, refer to the setting method as described in Annex D. Defined cooling load Lc(tj) at outdoor temperature tj, which is necessary to calculate the cooling seasonalenergy consumption, shall be determined by using the equation (2) below. L c tj = ful t 100 t j t 0 t 100 t 0 (2) Where,ϕful(t 100 ) is the cooling capacity at t 100 at full-load operating conditions. 6.3 Outdoor Temperature Bin Distribution for Cooling Table 3 shows the reference outdoor temperature bin distribution. Cooling seasonal performance factor (CSPF) shall be calculated at the reference climate condition as specified in Table 3. The calculation of cooling seasonal performance factor may also be done for other climate conditions. Table 3 Reference Outdoor Temperature Bin Distribution (Clause 6.2) Bin hours of each outdoor temperature may be calculated by multiplying the fractional bin hours by the total annual cooling hours if the fractional bin hours are applicable. In case of setting other outdoor temperature bin distribution, refer to the setting method as described inannex D. 6.4 Cooling Seasonal Characteristics of Fixed Capacity Units 11

15 Operational performance at each test, which is used for calculation of seasonal performance factor, shall be in accordance with Table Capacity Characteristics against Outdoor Temperature Capacity ϕ ful (tj) (W) of the equipment when it is operated for cooling at outdoor temperature tj linearly changes depending on outdoor temperatures as shown in Figure A.1 in Annex A, and it is determined by the equation given in (3) below from two characteristics, one at 35 C and the other at 29 C. ful t j = ful 35 + ful 29 ful t j (3) Power Input Characteristics against Outdoor Temperature Power input P ful (tj) (W) of the equipment when it is operated for cooling at outdoor temperature tj linearly changes depending on outdoor temperatures as shown in Figure A.1 in Annex A, and it is determined by the equation given in (4) from two characteristics, one at 35 C and the other at 29 C. P ful t j = P ful 35 + P ful 29 P ful t j (4) Calculation of Cooling Seasonal Total Load (CSTL) Cooling seasonal total load (CSTL), L CST, shall be determined using the equation (5) from the total sum of cooling load at each outdoor temperature tj multiplied by bin hours nj. m n L cst = j =1 L c T j n j + ful t l n j j =m+1 (5) a) In the range of Lc(tj) ϕ ful (tj) (j = 1 to m): Lc(tj) shall be calculated by using the equation given in (2). b) In the range of Lc(tj) >ϕ ful (tj) (j = m+1 to n): ϕ ful (tj) shall be calculated by the equation (3) Calculation of Cooling Seasonal Energy Consumption (CSEC) Cooling seasonal energy consumption (CSEC), CCSE, shall be determined using the equation (6) from the total sum of cooling energy consumption at each outdoor temperature tj. n j =1 (6) F PL t j C CSE = X t j P ful t j n j Operation factor X(tj) shall be calculated by using the equation (7). X t j = L c t j t j (7) In the case of Lc(tj) >ϕ(tj), X(tj) = 1. 12

16 Part load factor (PLF), FPL(tj), caused by the equipment when it is cyclically operated at outdoor temperature tj, shall be determined by Formula (8) using degradation coefficient C D. F PL t j = 1 C D 1 Xt j (8) a) Cyclic operation (Lc(tj) ϕful(tj)): In equation (6), X(tj) shall be calculated by using the equation (7). In equation (7), ϕ(tj) = ϕful(tj). b) Full capacity operation (Lc(tj) >ϕful(tj)): In equation (6), X(tj) = FPL(tj) = Cooling Seasonal Characteristics of Two-Stage Capacity Units Coefficients specified in Table 1 may be used for each characteristic Capacity Characteristics against Outdoor Temperature Capacity ϕful(tj) (W) of the equipment when it is operated for cooling full capacity at outdoor temperature tj shall be defined by the equation (3). Capacity ϕmin(tj) (W) of the equipment when it is operated for cooling minimum capacity at outdoor temperature tj shall be defined by the equation (9). min t j = min 35 + min 29 min t j (9) Power Input Characteristics against Outdoor Temperature Power input Pful(tj) (W) of the equipment when it is operated for cooling full capacity at outdoortemperature tj shall be defined by the equation (4). Power input Pmin(tj) (W) of the equipment when it is operated for cooling minimum capacity at outdoortemperature tj shall be defined by the equation (10). P min t j = P min 35 + P min 29 P min t j (10) Calculation of Cooling Seasonal Total Load (CSTL) For the calculation of CST, equation (5) given in shall be used Calculation of Cooling Seasonal Energy Consumption (CSEC) Cooling seasonal energy consumption (CSEC), CCSE, shall be calculated by using the equation (11). 13

17 C CSE = k j =1 X t j P min t j n j F PL t j m + P mf t j n j + P ful j ==k+1 n j =m+1 t j n j Relation of cooling capacity characteristics and power input characteristics to cooling load at outdoor temperature tj is shown in Fig. A.2 in Annex A. a) First stage cyclic operation (Lc(tj) ϕmin(tj), j = 1 to k): In equation (11), X(tj) shall be calculated by the equation (7). In equation (7), ϕ(tj) = ϕmin(tj). b) Second stage cyclic operation (ϕmin(tj) <Lc(tj) ϕful(tj), j = k+1 to m): P mf t j = X mf t j P min t j + 1 X mf t j P ful t j (12) X mf t j = ful t j L c t j ful t j min t j (13) c) Full capacity operation (Lc(tj) >ϕful(tj), j = m+1 to n): Pful(tj) shall be calculated by the equation (4). 6.6 Cooling Seasonal Characteristics of Multi-Stage Capacity Units Capacity Characteristics Against Outdoor Temperature Capacities ϕful(tj) and ϕmin(tj) (W) of the equipment when it is operated for cooling at outdoortemperature tj are shown in Fig. A.3 in Annex A and shall be determined by the equation (3) and (9),respectively. Formula (14) shows cooling half capacity characteristics at outdoor temperature tj. haf t j = haf 35 + haf 29 haf t j (14) Power Input Characteristics Against Outdoor Temperature Power input Pful(tj) and Pmin(tj) (W) of the equipment when it is operated for cooling at outdoortemperature tj shall be determined by the equation (4) and (10), respectively. Equation (15) shows cooling half power input at outdoor temperature tj. P haf t j = P haf 35 + P haf 29 P haf t j (15) Calculation of cooling seasonal total load (CSTL) For the calculation of CSTL, equation (5) given in shall be used Calculation of Cooling Seasonal Energy Consumption (CSEC) 14

18 When the minimum capacity data are available, then the cooling seasonal energy consumption (CSEC), CCSE, shall be calculated by the equation (16). k p X t j P min t j n j C CSE = + P mh t j n j + P hf t j n j + P ful t j n j F PL t j =1 j j =k+1 j =p+1 j =m+1 (16) Relation of cooling capacity and power input characteristics to cooling load at outdoor temperature tj is shown in Fig. A.3 in Annex A. m n a) First stage cyclic operation (Lc(tj) ϕ min(tj), j = 1 to k): In equation (16), X(tj) shall be calculated by the equation (7). In equation (7), ϕ(tj) = ϕmin(tj). b) Second stage cyclic operation (ϕ min(tj) <Lc(tj) ϕ haf(tj), j = k+1 to p): P mh t j = X mh t j P min t j + 1 X mh t j P haf t j (17) X mh t j = haf t j L c t j haf t j min t j (18) c) Third stage cyclic operation (ϕhaf(tj) <Lc(tj) ϕful(tj), j = p+1 to m): P hf t j = X hf t j P haf t j + 1 X hf t j P ful t j (19) X hf t j = ful t j L c t j ful t j haf t j (20) d) Full capacity operation (Lc(tj) >ϕ ful(tj), j = m+1 to n): Pful(tj) shall be calculated by the equation (4). When the minimum capacity data are not available, then the cooling seasonal energy consumption (CSEC), CCSE, shall be calculated alternatively by equations (21). C CSE = p X t j P haf t j n j j =1 + P hf t j n j + j =m+1 P ful t j n j F PL t j m n j =p+1 (21) a) First stage cyclic operation (Lc(tj) ϕhaf(tj), j = 1 to p): In equation (21), X(tj) shall be calculated by the equation (7). In equation (7), ϕ(tj) = ϕhaf(tj). b) Second stage cyclic operation (ϕhaf(tj) <Lc(tj) ϕful(tj), j = p+1 to m): In equation (21), Phf(tj) and Xhf(tj) shall be calculated by the equation (19) and (20), respectively. c) Full capacity operation (Lc(tj) >ϕful(tj), j = m+1 to n): 15

19 Pful(tj) shall be calculated by the equation (4). 6.7 Cooling Seasonal Characteristics of Variable Capacity Units Coefficients specified in Table 1may be used for each characteristic Capacity Characteristics against Outdoor Temperature Capacities ϕful(tj), ϕmin(tj) and ϕhaf(tj) (W) of the equipment when it is operated for cooling at outdoor temperature tj are shown in Fig. A.4 in Annex A and shall be determined by Formulae (3), (9) and (14), respectively Power Input Characteristics against Outdoor Temperature Power input Pful(tj), Pmin(tj) and Phaf(tj) (W) of the equipment when it is operated for cooling at outdoor temperature tj shall be determined by equation (4), (10) and (15), respectively Calculation of Cooling Seasonal Total Load (CSTL) Equation (5) given in shall be used Calculation of Cooling Seasonal Energy Consumption (CSEC) When the minimum capacity data are available, then the cooling seasonal energy consumption (CSEC), CCSE, shall be calculated by equation (16). When the minimum capacity data are not available, then the cooling seasonal energy consumption(csec), C CSE, shall be calculated alternatively by the equation (21). Relation of cooling capacity, power input and EER characteristics to cooling load at outdoor temperature tj is shown in Fig. A.4 in Annex A. Calculation methods for each term of equation (16) are as follows: a) Cyclic operation (Lc(tj) ϕmin(tj), j = 1 to k): In equation (16), X(tj) shall be calculated by the equation (7). In equation (7), ϕ(tj) = ϕmin(tj). b) Variable capacity operation between minimum and half capacity (ϕmin(tj) <Lc(tj) ϕhaf(tj), j = k+1 to p): tp is outdoor temperature when cooling load is equal to cooling minimum capacity. The calculation method for the crossing point is described in Annex E. R,min(t p ) shall be calculated from min (t p ) and P min (t p ). tc is outdoor temperature when cooling load is equal to cooling half capacity (seeannex E). E ER, haf (t c ) shall be calculated from haf (t c ) and P haf (t c ). 16

20 It is assumed that EER linearly changes depending on outdoor temperature when the capacity of equipment changes continuously. E ER,mh t j = E ER,min t p + E ER,haf t c E ER,min t p t c t p t j t p (22) P mh (t j), power input between minimum and half capacity operation, shall be calculated fromlc(t j)cooling load and E ER, mh (t j) by Formula (23). P mh t j = L c t j E ER,m h t j c) Variable capacity operation between half and full capacity (ϕ haf (tj) <Lc(tj) ϕ ful (tj), j = p+1 to m): tc is outdoor temperature when cooling load is equal to cooling half capacity (see Annex E). E ER, haf (t c ), Energy Efficiency Ratio (EER) at outdoor temperature tc at half capacity operation, shall be calculated from haf (t c ) and P haf (t c ) by equation (24). E ER,haf t c = haf t c P haf t c (24) t b is outdoor temperature when cooling load is equal to cooling full capacity (seeannex E). (23) E ER, ful (t b ), Energy Efficiency Ratio (EER) at outdoor temperature t b at full capacity operation,shall be calculated frome ER, ful (t b ) and P ful (t b ) by equation (25). E ER,ful t b = ful t b P ful t b (25) It is assumed that EER linearly changes depending on outdoor temperature when the capacity of equipment changes continuously. E ER,hf t j = E ER,haf t c + E ER,ful t b E ER,haf t c t b t c t j t c (26) P hf (t j ), power input between half and full capacity operation, shall be calculated from Lc(tj) cooling load and E ER, hf (tj) by Formula (27). P hf t j = L c t j E ER,hf t j (27) d) Full capacity operation (ϕ ful (t j) <Lc(tj), j = m+1 to n): P ful (tj) shall be calculated by the equation (4). In case that the minimum capacity is not measured, the cooling seasonal energy consumption (CSEC), C CSE, shall be calculated by Formula (21). a) Cyclic operation (Lc(tj) ϕ haf (tj), j = 1 to p): In this range, calculation shall be made assuming that the air conditioner cyclically operates withthe half operating capacity. 17

21 In equation (21), X(tj) shall be calculated by the equation (7). In equation (7), ϕ(tj) = ϕ haf (tj). b) Variable capacity operation between half and full capacity (ϕ haf (tj)<lc(tj) ϕ ful (tj), j = p+1 to m): This calculation shall be made by using the equation (24) to (27). c) Full capacity operation (ϕ ful (t j) <Lc(tj), j = m+1 to n): P ful (tj) shall be calculated by the equation (4). 7 TEST REPORT The test report shall include the following: a) the type of unit; b) the list of mandatory test points performed, and the resulting capacity and EER values; c) the list of optional test points performed, and the resulting capacity and EER values; d) the default values used; e) for multi-split systems, a combination of indoor units and an outdoor unit. For variable capacity units, frequency settings for each performed test shall also be indicated. The cooling seasonal performance factor (CSPF) and/or Indian Seasonal Energy Efficiency Ratio (ISEER) shall be declared with three significant digits, with reference to the reference defined cooling load and to the reference outdoor temperature bin distribution used. ANNEX A Figures 18

22 X Y1 Y2 outdoor temperature capacity or load power input Figure A.1 - Cooling Capacity, Power Input and Cooling Load for Fixed Capacity Units 19

23 Key X Y1 Y2 outdoor temperature capacity or load power input Figure A.2 - Cooling Capacity, Power Input and Cooling Load for Two-Stage Capacity Units 20

24 Key X Y1 Y2 outdoor temperature capacity or load power input Figure A.3 - Cooling Capacity, Power Input and Cooling Load for Multi-Stage Capacity Units 21

25 Key X Y1 Y2 Y3 outdoor temperature capacity or load power input energy efficiency ratio (EER) Figure A.4 - Cooling Capacity, Power Input, Cooling Load and EER for Variable CapacityUnits 22

26 ANNEX B Calculation of Total Cooling Seasonal Performance Factor (TCSPF) B.1 General This Annex applies to cooling only units, cooling units with supplemental heat and reversible units. B.2 Measurement of the Electric Power Consumption during the Inactive Mode The unit shall be electrically connected to the main power source after shutdown for 6 h. Indoor andoutdoor temperature of 20 C condition shall be reached. The power consumption shall be measured forone hour after the temperature conditions are stabilized. The same test is repeated with the temperaturecondition of 5 C, 10 C and then 15 C with the stabilization period of 2 h between each test. As areference case, each power consumption value shall be weighted by the weighting factors given in Table B.1and then integrated to obtain a weighted average inactive power consumption, Pia. The calculation of inactive power may also be undertaken for other climate conditions and operating schedules. NOTE- If the results of the tests at 20 C and 5 C are within 5 percent or 1 W, then the tests at 15 C and 10 C arenot mandatory. The average value of these results is used for the four considered temperature conditions. Table B.1 Default Weighting Factors for Determination of Reference Inactive Energy Consumption Temperature condition 5 C 10 C 15 C 20 C Weighting factor Inactive energy consumption (IAEC) shall be calculated by using the equation (B.1). C IAE = H ia P ia Where, (B.1) C IAE is the inactive energy consumption; H ia is the number of hours of inactive mode as given in Table B.2; P ia is the weighted average power consumption. B.3 Calculation of Total Cooling Seasonal Performance Factor (TCSPF) Total cooling seasonal performance factor (TCSPF), F TCSP, shall be calculated by the equation (B.2). F TCSP = L CST C CSE + C IAE (B.2) Calculation of L CST and C CSE is according to the main body of this part of ISO Inactive energy consumption (IAEC), C IAE, shall be calculated by the equation (B.1). 23

27 The default mode hours for the calculation of reference total cooling seasonal performance factor areshown in Table B.2. The calculation of total cooling seasonal performance factor may also be undertaken for other distributions of mode hours. Table B.2 Default Hours by Mode for the Calculation of Reference Total Cooling Seasonal Performance Factor Unit Active mode Inactive mode H ia Disconnected mode h h H Cooling only unit Cooling unit with Supplemental heat 1817 (Heating operation 2866) Reversible unit 1817 (Heating operation 2866)

28 ANNEX C Testing and Calculation Method for Degradation Coefficient of Cyclic Operation C.1 Low Humidity Cooling Test and Cyclic Cooling Test The low humidity-cooling test and the cyclic cooling test shall be conducted in accordance with Annex A of ISO 5151 and Annex B of ISO and ISO as specified in C.2 of this Annex. Testing condition for cyclic cooling test is shown in Table C.1. Table C.1 Temperature and humidity conditions for cyclic cooling test Duration of ON and OFF interval of cyclic operation test is shown in Table C.2. 25

29 Table C.2 Duration of ON and OFF interval of cyclic operation test C.2 Test Procedure C.2.1 Test Procedure for Steady-State Dry-Coil Cooling Mode Test (A Test) Prior to recording data during the steady-state dry coil test, operate the unit at least one hour afterachieving dry coil conditions. Drain the drain pan and plug the drain opening. Thereafter, the drain pan should remain completely dry. Record the cooling capacity and electrical power derived from the steady-state dry-coil mode test. In preparing for C.2.2 cyclic tests, record the average indoor-side air volume rate derived from either pressure difference or velocity pressure for the flow nozzles and air properties. C.2.2 Test Procedure for Optional Cyclic Dry-Coil Cooling Mode Test (B Test) C Test Condition After completing the steady-state dry-coil test, remove the outdoor air enthalpy method test apparatus, if connected, and begin manual OFF/ON cycling of the unit s compressor. The test set-up should otherwise be identical to the set-up used during the steady-state dry-coil test. When testingheat pumps, leave the reversing valve during the compressor OFF cycles in the same position as used for the compressor ON cycles, unless automatically changed by the controls of the unit. Duration of ON and OFF interval shall be in accordance with Table C.2. Repeat the OFF/ON compressor-cycling pattern until the test is completed. Allow the controls of the unit to regulate cycling of the outdoor fan. 26

30 In all cases, use the exhaust fan of the airflow measuring apparatus along with the indoor fan of the unit, if installed and operating, to approximate a step response in the indoor coil airflow. C Measurement by Using the Automatic Exhaust Fan Control of Airflow Measuring Apparatus If the airflow measuring apparatus has a function to adjust static pressure automatically and immediately so that static pressure difference is equal to zero for ductless units or static pressure is equal to a certain external pressure value for ducted units by controlling the exhaust fan operation, the difference between the value of nozzle pressure or velocity pressure which is measured by the airflow measuring apparatus having an automatic exhaust fan control and the value which is measured at the steady-state dry-coil test shall be within 2 percent within 15 s after airflow initiation. If the airflow measuring apparatus does not meet the requirements or if the apparatus does not have the ability to automatically control the exhaust fan, it may be measured by manually adjusting the exhaust fan. C Measurement by Using the Manual Exhaust Fan Control of Airflow Measuring Apparatus Regulate the exhaust fan to quickly obtain and then maintain the flow nozzle static pressure difference or velocity pressure at the same value as was measured during the steady-state dry-coil test. The pressure difference or velocity pressure should be within 2 percent of the value from the steady-state dry coil test within 15 s after airflow initiation. C.2.2.4Data Collection After completing a minimum of two complete compressor OFF/ON cycles, determine the overall cooling delivered and total electrical energy consumption during any subsequent data collection interval. Test tolerance of the dry-bulb temperature shall be ± 2.5 C on the indoor side and ± 5 C on the outdoor side as specified in IS 1391 (Part 1 and 2), IS 8448 and ISO (corresponding Indian standard under preparation). Sample the air property, air flow rate and electrical voltage at least every 2 min during periods when air flows through the coil. Record the dry-bulb temperature of the air entering and leaving the indoor coil at equal intervals that span 10 s or less. Integrate the cooling capacity and the electrical power over complete cycles. For ducted units tested with an indoor fan installed and operating, integrate electrical power from indoor fan OFF to indoor fan OFF. For all other ducted units and for non-ducted units, integrate electrical power from compressor OFF to compressor OFF. Degradation coefficient (C D ) shall be calculated by using the result of A test and B test of Table C.1by equation (C.1). Equation (C.1) is expressed for the case of full capacity operation. Equation (C.1) can be applied for half cooling capacity cyclic operation ϕ haf (cyc) and minimum cooling capacity cyclic operation ϕ min(cyc). C D = ful (cyc ) Pful (cyc ) 1 ful (dry ) 1 E ER,full (cyc ) Pful (dry ) E ER,full (dry ) 1 = ful (cyc ) 1 F CL,full ful (dry ) (C.1) 27

31 Where, ϕful(cyc) Pful(cyc) ϕful(dry) Pful(dry) EER, ful(cyc) EER, ful(dry) FCL, ful Capacity (W) of air conditioner when operated for cooling with the rated operating capacity tested by the method specified in C.2.2; is the cooling power consumption (W) when operated for cooling with the rated operating capacity tested by the method specified in C.2.2; is the capacity (W) of air conditioner when operated for cooling with the rated operating capacity tested by the method specified in C.2.1; is the cooling power consumption (W) when operated for cooling with the rated operating capacity tested by the method specified in C.2.1; is the energy efficiency ratio of air conditioner when operated for cooling with the rated operating capacity tested by the method specified in C.2.2; is the energy efficiency ratio of air conditioner when operated for cooling with the rated operating capacity tested by the method specified in C.2.1; is the ratio of ϕful(cyc) and ϕful(dry). ANNEX D Calculating Method for Seasonal Performance Factor When Setting A Specific Cooling Load General A specific cooling load widely varies from region to region on the globe depending on climate conditions, building structures and the situations in which air conditioners and heat pumps (hereinafter referred to as equipment) are used. In order to evaluate and compare different seasonal performance factors of the equipment, it is desirable that a representative cooling load is established. For this purpose, this annex is given to establish a minimum, representative cooling load and to show an evaluation method of the equipment operating at the conditions fixed by this load. 28

32 This annex also specifies a calculation method for seasonal performance factor of the equipmentinstalled in a specific region or in a specific building. D.1 Cooling Seasonal Performance Factor (CSPF) Calculation of cooling seasonal performance factor (CSPF) is made in accordance with the provisions specified in the main body for each type of equipment. D.1.1 Setting of Bin Hours of Outdoor Temperature Which Requires Cooling in a Specific Region Bin hours of each outdoor temperature which requires cooling during the cooling season shall be set. D.1.2 Setting of a Specific Cooling Load, Lc a) An outdoor temperature at 100 percent cooling load shall be set. b) The highest outdoor temperature occurred is determined from the data in D.1.1, butit is desirable to exclude the abnormal condition which is thought to be unusual. c) A load of a specific building is calculated to determine the required cooling capacity at the100 percent load outdoor temperature. d) 0 percent load outdoor temperature shall be set based on the calculated load of the specificbuilding and the purpose of using the equipment. e) From these, a load curve is obtained. D.1.3 Outdoor Temperature Characteristics of Equipment Outdoor temperature characteristics of equipment relative to cooling capacity and power input areobtained from the main body. ANNEX E Calculating Method for Temperature When Defined Load LineCrosses Each Capacity Line E.1 Defined load Lc(tj) is calculated by Formula (E.1), which is the same as given in equation (2). L c t j = ful t 100 t j t 0 t 100 t 0 (E 1) 29

33 E.2 Each capacity characteristic ϕ(tj) is given by Formulae (E.2) to (E.4), which are the same as equation (3), (9) and (14). ful t j = ful 35 + V ful 29 ful t j (E 2) haf t j = haf 35 + haf 29 haf min t j = min 35 + min 29 min t j (E 3) 35 t j (E 4) Crossing point of full capacity operation line and load line, tb, is calculated by Formulae (E.1) and (E.2). L c t j = ful t j ful t 100 t b t 0 = t 100 t ful 35 + ful 29 ful t b (E 5) Then, tb is given by the equation (E.6). t b = 6 ful t 100 t 0 +6 ful 35 t 100 t ful 29 ful 35 t 100 t 0 6 ful t ful 29 ful 35 t 100 t 0 (E 6) Crossing point of half capacity operation line and load line, tc, is calculated by equation (E.1) and (E.3). ful t 100 t c t 0 = t 100 t haf 35 + haf 29 haf t c (E 7) Then, tc is given by equation (E.8). t c = 6 ful t 100 t 0 +6 haf 35 t 100 t haf 29 haf 35 t 100 t 0 6 ful t haf 29 haf 35 t 100 t 0 (E 8) Crossing point of minimum capacity operation line and load line, tp, is calculated by Formulae (E.1) and (E.4). ful t 100 t p t 0 = t 100 t min 35 + min 29 min t p (E 9) Then, tp is given by the equation (E.10). t p = 6 ful t 100 t 0+6 ful 35 t 100 t min 29 min 35 t 100 t 0 6 ful t min 29 min 35 t 100 t 0 (E 10) Using default ϕ(29) = 1,077 ϕ (35) in Table 1of the main body, ϕ(tj) becomes equation (E.11). ful t j = ful , t j 6 (E 11) 30

34 Crossing point of full capacity operation line and load line, tb, is calculated by equation (E.1) and (E.11). ful t 100 t b t 0 = t 100 t ful , t b 0 6 (E 12) Then, tb is given by the equation (E.13). t b = 6 ful t 100 t 0+6 ful 35 t 100 t 0 +0, ful 35 t 100 t 0 6 ful t ,077 ful 35 t 100 t 0 (E 13) In the same way, crossing point of half capacity operation line and load line, tc, is given by equation (E.14). t c = 6 ful t 100 t 0+6 haf 35 t 100 t 0 +0, haf 35 t 100 t 0 6 ful t ,077 haf 35 t 100 t 0 (E 14) In the same way, crossing point of minimum capacity operation line and load line, tp, is given by equation (E.15). t p = 6 ful t 100 t 0+6 min 35 t 100 t 0 +0, min 35 t 100 t 0 6 ful t ,077 min 35 t 100 t 0 (E 15) ANNEX AA (Foreword) COMMITTEE COMPOSITION Refrigeration and Air Conditioning Sectional Committee, MED 03 Organization Indian Institute of Technology, Roorkee Annapurna Electronics and Services Ltd, Hyderabad Bureau of Energy Efficiency, New Delhi Carrier Aircon Ltd, Gurgaon Central Power Research Institute, Bangalore Consumer Education and Research Centre, Ahmedabad Danfoss Industries Pvt. Ltd., Gurgaon Directorate of Quality Assurance (Engg. Div.), Pune Representative (s) PROF (DR) RAVI KUMAR (Chairman) SHRI G.K. PRASAD SHRI J.S. SASTRY (Alternate) SHRI SAURABH DIDDI SHRI MANJEET SINGH (Alternate) SHRI BIMAL TANDON SHRI D. BHATTACHARYA (Alternate) SHRI A.R. RAVIKUMAR SHRI GUJJALA B.BALARAJA (Alternate) MS. SWETA MAHAJAN SHRI DEEPAK VERMA SHRI K.L. NAGAHARI (Alternate) SHRI J P TIWARI LT COL MAHENDRA PRASA (Alternate) 31

35 Electrical Research and Development Association, Vadodara SHRI GAUTAM BRAHMBHATT SHRI RAKESH PATEL (Alternate) Electronic Regional Test Laboratory, New Delhi Emerson Climate Technologies(India) Pvt. Ltd, Karad SHRI ASHOK KUMAR SHRI DAMAN KUMAR GULATI (Alternate) SHRI CHETHAN THOLPADY SHRI D.P.DESPANDE (Alternate) Honeywell International India Pvt Ltd, Gurgaon Indian Institute of Chemical Engg, Kolkata Indian Society of Heating, Refrigerating and Air Conditioning Engineers (ISHRAE), New Delhi International Copper Association India, Mumbai Intertek India Pvt Ltd, New Delhi LG Electronics India Pvt Ltd, New Delhi National Horticulture Board, Ministry of Agriculture, Gurgaon National Thermal Power Corporation, Noida Nirma University of Science & Technology, Ahmedabad SHRI SUDHIR KAVALATH DR NITIN KARWA (Alternate) DR D.SATHIYAMOORTHY DR. SUDIP K DAS (Alternate) DR JYOTIRMAY MATHUR SHRI ASHISH RAKHEJA SHRI SANJEEV RANJAN SHRI SHANKAR SAPALIGA (Alternate) SHRI BALVINDER ARORA SHRI C.M. PATHAK (Alternate) SHRI GAURAV KOCHHAR SHRI S.T. HAQUE FARIDI (Alternate) DR R. K. SHARMA SHRI BRAJENDRA SINGH (Alternate) SHRI D.K. SURYANARAYAN SHRI S.K. JHA (Alternate) DR. VIKASH J LAKHERA Refrigeration & Airconditioning Mfr Association, New Delhi Samsung India Electronics Pvt Ltd, Noida Spirotech Heat Exchanger Pvt Ltd., Bhiwadi SRF Ltd SHRI GURMEET SINGH SHRI R.K. MEHTA (Alternate) SHRI GAURAV CHOUDHARY SHRI KALICHARAN SAHU (Alternate) SHRI SUNIL BHARDWAJ SHRI DWIJESH GAUTAM (Alternate) SHRI RABINDEER N. KAUL Symphony Ltd, Mumbai The Chemoours India Pvt Ltd., Gurgaon The Energy and Resources Institute, New Delhi UL India Pvt Ltd, Bengaluru Voltas Ltd, Mumbai SHRI P. BHATTACHARYA SHRI AMIT RAMI (Alternate) SHRI VIKAS MEHTA SHRI NISHIT SHAH (Alternate) SHRI P S. CHIDAMBARAM SHRI GIRISH SETHI (Alternate) SHRI V. MANJUNATH SHRI SATISH KUMAR (Alternate) SHRI RITESH SINGH SHRI A.D. KUMBHAR (Alternate) 32

36 Voluntary Organizationn in Interest of Consumer Voice, New Delhi In personal capacity (H.No. 03, Savita Vihar, Delhi) SHRI H. WADHWA SHRI B.K. MUKHOPADHYAY (Alternate) SHRI J.K. AGRAWAL In personal capacity (506/2, Kirti Apartments, Mayur Vihar, Phase -1 Extension, Delhi) BIS Directorate General SHRI P.K. MUKHERJEE SHRI RAJNEESH KHOSLA, SCIENTIST E AND Head (MED) [Representing Director General (Ex-officio)] Member Secretary Ms Khushbu Jyotsna Kindo Scientist B (MED), BIS 33