In the Psy. Ch., plot point o, r, h r = 51.0 kj/kg, h o = 85 kj/kg
|
|
- Thomas Murphy
- 6 years ago
- Views:
Transcription
1 & Marking Scheme (Page 1 of 8 ) 1. (a)(i) In the Psy. Ch., plot point o, r, h r = 51.0 kj/kg, h o = 85 kj/kg SHR = rs/rt = 63/70 = 0.9 Draw a line with SHR= 0.9 from r and intercept at s or cc in such a way that s is 95%RH. From the chart, t s = 14 C, h s = h cc = 38 kj/kg and v s = m 3 /kg (ii) (iii) Volume flow rate, V s = Q s *v s /( C pa (t r t s )) = 63*0.826/(1.02(25-14)) = m 3 /s Outdoor ventilation air required = 30 x 50 x = 0.75 m 3 /s t m = (V r * t r + V o * t o )/ V m, V r + V o =V m,v s =V m V r = V s - V o = = m 3 /s t m = (3.888* *32)/ = C h m = (3.888* *85)/ = kj/kg [Use of graphical methos is also accepted] (iv) (b)(i) (ii) Cooling Coil Load, Q cc = V s (h m h cc ) /v s = 4.638( )/0.826 = kw When the outdoor ventilation air is increased by 50%, no change in t o and h o. While, t m and h m will become higher and the cooling coil load Q cc will become higher. When the outdoor ventilation air condition is changed to 34 C and 80% relative humidity, t o and h o.will become higher. Also, t m and h m will become higher and the cooling coil load Q cc will become higher.
2 & Marking Scheme (Page 2 of 8 )
3 & Marking Scheme (Page 3 of 8) Question No. 2 (a) (b) Solar radiation and conduction through window, and conduction through external walls and roof. People, equipment, lighting and infiltration. [0.5 mark for each item] (i) From table, Zone types B, C and C for Solar, People/Equipment and Lighting respectively (ii) t O = 35 and t r = 23 t m = t o - (Daily range/2) = 35 (7/2) = 31.5 Correct Factor = (25.5-t r ) + (t m -29.4) = ( ) + ( ) = 4.6 (iii) (1) q = A x SCL x SC SCL = 523 W/m 2 = 40 x 523 x 0.65 = W (2) q = A x CLTDc x U CLTD = 9 = 80 x (9+4.6) x 3.5 = 3808 W (3) q = W F ul F al (CLF el ) CLF el = 0.92 = (500x20) x 1.0 x 1.2 x 0.92 = W (c) Heavier mass implies greater thermal storage leading to reduction in peak value and its occurrence shifting to some later time.
4 & Marking Scheme (Page 4 of 8 ) Question No. 3 (a) Sizing of Air Ducts Duct Section Flow Rate (L/s) Friction Loss (Pa/m) Duct Dia. (mm) Air Velocity (m/s) Length (m) OA AB CD DE EF EI FH FG GJ (b) Velocity Pressures and Dynamic Losses Junction Air Velocity (m/s) Velocity Pressure at Junctions Pv,c = 0.5 ρv2 Dynamic Loss Coefficient Dynamic Loss (Pa) A D E (C c,s ) F (C c,s ) G ΔP atraight duct from O to J = ( ) x 0.9 = 27.9 Pa ΔPO-A-B-C-D-E-F-G-J = ΔPO + ΔP (O to J) +ΔPA +ΔPD + ΔPE(Cc,s) + ΔPF(Cc,s) + ΔPG + ΔPJ = = Pa (c) Install volume control dampers at the non-critical paths O to I and O to H so that all the three paths have the same pressure loss..
5 & Marking Scheme (Page 5 of 8 ) Question No. 4(a) 4(b) (i)linear dimension, D served by an ceiling diffuser < < 8.7 m Along 38m length : 38/8.7 = nos Along 30m length : 30/8.7 = nos. So, no. of diffuser = 20 (5x4 arrangement) (ii) D1=38/5 = 7.6 D2 = 30/4 = 7.5 D max / D min = 7.6 / 7.5 = 1.01 < 1.3 (acceptable) Characteristic Length L for 38m length = 7.6 / 2 = 3.8m Characteristic Length L for 30m length = 7.5 / 2 = 3.75m For ceiling diffusers, T 0.25 / L = 0.8 for ADPI > 80% T 0.25 for 38m length = = 3.04 T 0.25 for 30m length = = 3 Assume equal load at each outlet, 3.59 / 20 = m 3 /s Processing 0.18 m 3 /s and T 0.25 (3.04; 3)-- 250x250 neck size is suggested. (NC=24; velocity= criteria check OK) Use ADPI as a tool Average velocity = 23.9 o C Point Temp Velocity θ OK OK OK OK OK OK OK Number of points where -1.7 o C θ 1.1 o C and velocity 0.35m/s = 14 ADPI = 7 /10 = 70% As ADPI < 80%, i.e. ineffective space air diffusion system
6 & Marking Scheme (Page 6 of 8 ) Question No. 5 (a) 5 (b) Superheat : to prevent liquid refrigerant from entering the compressor ; and to increase refrigeration effect; Subcooling : to ensure complete condensation; to increase refrigeration effect (i) Condenser Pressure : 1.2MPa Evaporator Pressure: 0.41MPa (ii) h 1 = 410 kj/kg h 3 = h 4, h 4 = 258 kj/kg R.E. = h 1 h 4 = = 152 kj/kg (iii) η = isentropic work h h = 1 actual work actual work 2 S 1 = S 2 (ideal compression), h 2 = 428 kj/kg ( ) Actual work = = 20 kj/kg 0.9 (iv) Refrigeration Capacity = RE m r = = 608 kw (v) The lower temperature of cooling water results in a lower condenser pressure. For a given evaporator pressure, the power input to the compressor will be reduced leading to an increase in COP. There will be an overall energy saving and improved in system performance.
7 & Marking Scheme (Page 7 of 8 ) Question No. 5 (b)
8 & Marking Scheme (Page 8 of 8 ) Question No. 6 (a) 6 (b) Primary air fan coil system is preferred. It is because PAU can be used to carry out dehumidification of humid outdoor air and to reduce noise from outside by installing silencer. There will be less condensate at FCU/indoor, less water leakage problem and lower indoor noise level. Lw = log P + 10 log Ps Lw = log (30) + 10 log (200) = = db For backward curve fan, correction factor at 2kHz = -16 SWL = = db 6 (c) (i) SPLt = SPL d + SPLr = 10 Log(10^(55/10) +10^(58/10)) = db (ii) For a general office, NC 35 to 45 is required and hence SPL NC = 34 to 44 db at 2 khz. As the resultant SPL = db >34 to 44 db, the ventilation fan is not suitable for use in this general office. 6 (d) By Allen formula, SWL = SWL B D R + 10log(S w /A) S w = ( )*2 *8 = 16 m 2 A = (0.6) *(0.4) = 0.24 m 2 SWL = log(16/0.24) = db B
WC Engineering Corp Touchton Rd., Bldg. 100, Suite 150 Jacksonville, FL Attn: Michael Jones May 25, 2017
WC Engineering Corp. 4600 Touchton Rd., Bldg. 100, Suite 150 Jacksonville, FL 32246 Attn: Michael Jones May 25, 2017 Subject: HVAC Calculations per elegantcafedwg.pdf Quote #: QU-51217 Building area: 2,420
More informationTHE ENERGY 68,SAVING TDVI. exible Combine Modular 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44 HP 60, 62, 64, 66 HP
I N V E RT E R ion Range exible Combine Modular TDV I TDV I TDV I INVERTER INVERTER INVERTER 14, 16, 18, 20, 22 HP TDV I 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44 HP INVERTER INVERTER INVERTER TDV I INVERTER
More informationRefrigeration. 05/04/2011 T.Al-Shemmeri 1
Refrigeration is a process of controlled removal of heat from a substance to keep it at a temperature below the ambient condition, often below the freezing point of water (0 O C) 05/04/0 T.Al-Shemmeri
More informationR13 SET - 1 '' ''' '' ' '''' Code No RT21033
SET - 1 II B. Tech I Semester Supplementary Examinations, June - 2015 THERMODYNAMICS (Com. to ME, AE, AME) Time: 3 hours Max. Marks: 70 Note: 1. Question Paper consists of two parts (Part-A and Part-B)
More informationLecture 38: Vapor-compression refrigeration systems
ME 200 Termodynamics I Lecture 38: Vapor-compression refrigeration systems Yong Li Sangai Jiao Tong University Institute of Refrigeration and Cryogenics 800 Dong Cuan Road Sangai, 200240, P. R. Cina Email
More informationCooling of Electronics Lecture 2
Cooling of Electronics Lecture 2 Hans Jonsson Agenda Lecture 2 Introduction to Cooling of Electronics Cooling at different levels Cooling demand calculations Introduction to Cooling of Electronics Both
More informationNozzle diffuser. Dimensions
Nozzle diffuser GTI Dimensions Installation Ød Description GTI is a flexible supply air nozzle that is suitable for ventilation of large areas. The nozzle can be used for both heated and cooled air and
More informationMDSRC Proceedings, December, 2017 Wah/Pakistan. Cooling load analysis by CLTD and RLF. Sher ali nawaz 1 Muzammil shahbaz 2
Cooling load analysis by CLTD and RLF Sher ali nawaz 1 Muzammil shahbaz 2 Waqas Javid, M.Umer Sohail Department of mechanical engineering Wah engineering college University of wah sheralinawaz15@gmail.com,
More informationPyschrometric Sample Problem Pharmaceutical Engineering Graduate Program New Jersey Institute of Technology
Background A pharmaceutical company wishes to construct a manufacturing space which will require an HVAC system that functions within the following parameters: Space drybulb temperature = 70 F Space relative
More informationGreenhouse Steady State Energy Balance Model
Greenhouse Steady State Energy Balance Model The energy balance for the greenhouse was obtained by applying energy conservation to the greenhouse system as a control volume and identifying the energy terms.
More informationFundamentals of WUFI-Plus WUFI Workshop NTNU / SINTEF 2008
Fundamentals of WUFI-Plus WUFI Workshop NTNU / SINTEF 2008 Simultaneous Calculation of Transient Hygrothermal Conditions of Indoor Spaces and Building Envelopes boundary conditions Building envelope Outdoor
More informationInverter Multi-Split System
Inverter MultiSplit System Specifications Inverter MultiSplit Fan coil unit Fan Coil Unit Model RAVMS3KCVT RAVMS3KCVT RASMS3KCVT RAVM22S3KCVT RAVM24S3KCVT Standard Cooling Capacity (btu/hr) 9,212 12,624
More informationSubject: Principles of Refrigeration and Air Conditioning Lecturer: Assistant Professor Dr. Waheed Shaty Mohammed
Subject: Principles of Refrigeration and Air Conditioning Lecturer: Assistant Professor Dr. Waheed Shaty Mohammed Refrences: 1-A. R. Trott and T. Welch " Refrigeration and Air conditioning ",Third Edition
More informationMARIA COLLEGE OF ENGINEERING AND TECHNOLOGY
MARIA COLLEGE OF ENGINEERING AND TECHNOLOGY ATTOOR ENGINEERING THERMODYNAMICS (TWO MARK QUESTION BANK) UNIT 1 (BASIC COMCEPTS AND FIRST LAW) 1. Define the term thermal engineering. Thermal engineering
More information4 Way Reversing Valve
STANDARD 4 Way Reversing Valve SHF series four-way reversing valves are applicable for heat pump systems such as central, unitary and room air conditioners to realize switching between cooling mode and
More informationSection 2 of 6 Applied Psychrometrics
Section 2 of 6 Applied Psychrometrics Psychrometric chart - your energy map Key psychrometric variables for humidity Predicting building condensation Hot weather Cold weather Predicting moisture sorption
More informationToday s A/C systems include:
* www.sgvenergywise.org Replac ing your A/C system REQUIRES a permit from your c ity - it s important. WHY? Because A/C (air conditioning) is a SYSTEM, not just one piece of equipment. The thermostat,
More informationS.E. (Chemical Engineering) (Second Semester)EXAMINATION, 2012 THERMODYNAMICS-I (2008 PATTERN) Time : Three Hours Maximum Marks : 100
Total No. of Questions 12] [Total No. of Printed Pages 7 Seat No. [4162]-189 S.E. (Chemical Engineering) (Second Semester)EXAMINATION, 2012 THERMODYNAMICS-I (2008 PATTERN) Time : Three Hours Maximum Marks
More informationSEM-2017(03HI MECHANICAL ENGINEERING. Paper II. Please read each of the following instructions carefully before attempting questions.
We RoU No. 700095 Candidate should write his/her Roll No. here. Total No. of Questions : 7 No. of Printed Pages : 7 SEM-2017(03HI MECHANICAL ENGINEERING Paper II Time ; 3 Hours ] [ Total Marks : 0 Instructions
More informationIntroduction to Heat and Mass Transfer
Introduction to Heat and Mass Transfer Week 16 Merry X mas! Happy New Year 2019! Final Exam When? Thursday, January 10th What time? 3:10-5 pm Where? 91203 What? Lecture materials from Week 1 to 16 (before
More informationVRF Technical Data Book
VRF Technical Data Book DVM S for Euro_ET (R4A, Hz, HP) Model : Premium (Compact / Energy Efficiency) Type Standard Type History Version Modification Date Remark Ver. 1. Release DVM S (R4A, Hz, HP) for
More informationSHORTCUT CALCULATIONS AND GRAPHICAL COMPRESSOR SELECTION PROCEDURES
APPENDIX B SHORTCUT CALCULATIONS AND GRAPHICAL COMPRESSOR SELECTION PROCEDURES B.1 SELECTION GUIDE FOR ELLIOTT MULTISTAGE CENTRIFUGAL COMPRESSORS* * Reprinted from a 1994 Elliott Company sales bulletin.
More information8.21 The Physics of Energy Fall 2009
MIT OpenCourseWare http://ocw.mit.edu 8.21 The Physics of Energy Fall 2009 For information about citing these materials or our Terms of Use, visit: http://ocw.mit.edu/terms. 8.21 Lecture 10 Phase Change
More informationAir Diffusion Designing for Comfort
Air Diffusion Designing for Comfort Occupant Comfort Air Diffusion Selection ADPI Air Diffusion Performance index Ventilation Effectiveness Induction Room Space Induction Design Criteria ISO7730 ASHRAE
More informationHomework #4 Solution
Homework #4 Solution Problem 6.4 Determine the design winter heat loss tough each of the following components of a building located in Minneapolis, Minnesota: (a) Wall having 648 ft 2 of area and construction
More informationDEVELOPMENT OF COOLING LOAD TEMPERATURE DIFFERENTIAL VALUES FOR BUILDING ENVELOPES IN THAILAND
DEVELOPMENT OF COOLING LOAD TEMPERATURE DIFFERENTIAL VALUES FOR BUILDING ENVELOPES IN THAILAND Somsak Chaiyapinunt*, Khemmachart Mangkornsaksit, and Boonyarit Phueakphongsuriya ABSTRACT This article describes
More informationCZECH TECHNICAL UNIVERSITY IN PRAGUE FACULTY OF MECHANICAL ENGINEERING DEPARTMENT OF ENVIRONMENTAL ENGINEERING
CZECH TECHNICAL UNIVERSITY IN PRAGUE FACULTY OF MECHANICAL ENGINEERING DEPARTMENT OF ENVIRONMENTAL ENGINEERING APPLICABILITY OF CHILLED BEAM-SYSTEM IN THE MIDDLE EAST BACHELOR THESIS JACQUES MATTA 2 EE
More informationThe diagram below. to the by the. outlet into. calculation. Since TRANSMISSION VIA STRUCTURE. Vibration Via Supports Duct Breakout
NOISE CONTROL IN VENTILATING SYSTEMS INTRODUCTION The diagram below shows the various noise sources and transmission paths of plant rooms and ventilation systems. For the ventilation system this can be
More informationA State Space Approach for the Dynamic Analysis of Automotive Air Conditioning System
Purdue University Purdue e-pubs International Refrigeration and Air Conditioning Conference School of Mechanical Engineering 010 A State Space Approach for the Dynamic Analysis of Automotive Air Conditioning
More informationDevelopment of Economic Impact Models for RTU Economizer Faults
Purdue University Purdue e-pubs International Refrigeration and Air Conditioning Conference School of Mechanical Engineering 2014 Development of Economic Impact Models for RTU Economizer Faults Andrew
More informationTHE VAPOR COMPRESSION REFRIGERATION PROCESS
SUSTAINABLE ENERGY UTILIZATION - COMPUTER LAB 2 SEU-CL2 THE VAPOR COMPRESSION REFRIGERATION PROCESS OBJECTIVES The primary objective of this computer lab is to develop a simple model of the vapour compression
More informationCOMMERCIAL HEAT GAIN - HEAT LOSS CALCULATION LOAD FORM
COMMERCIAL HEAT GAIN - HEAT LOSS CALCULATION LOAD FORM Job Name: Address: Phone/Fax/Email: Contractor: Address: Phone/Fax/Email: Heat Gain Summary Sensible Heat (Btu/h) Latent Heat (Btu/h) Total Heat Gain
More informationHeating, Ventilating, Air Conditioning and Refrigerating, Sixth Edition, First Printing ERRATA
1 Heating, Ventilating, Air Conditioning and Refrigerating, Sixth Edition, First Printing ERRATA (Items in blue added August 14, 2007; previous revision was December 3, 2004) Inside Front Cover: Conversion
More informationS.E. (Chemical) (Second Semester) EXAMINATION, 2011 HEAT TRANSFER (2008 PATTERN) Time : Three Hours Maximum Marks : 100
Total No. of Questions 12] [Total No. of Printed Pages 7 [4062]-186 S.E. (Chemical) (Second Semester) EXAMINATION, 2011 HEAT TRANSFER (2008 PATTERN) Time : Three Hours Maximum Marks : 100 N.B. : (i) Answers
More informationAir distribution systems. Linear whirl outlet WL...
Air distribution systems Linear whirl outlet WL... DS 0 E 1.013 Preliminary remarks Mode of operation The linear whirl outlet generates turbulent mixing ventilation. It can be installed on or in a wall
More information1D-HAM. Coupled Heat, Air and Moisture Transport in Multi-layered Wall Structures. Manual with brief theory and an example. Version 2.
1D-HAM Coupled Heat, Air and Moisture Transport in Multi-layered Wall Structures. Manual with brief theory and an example. Version 2.0 30 t=70 days (1680 h) 100 Temperatures ( C) v (g/m³) 25 20 15 10 5
More informationT718. c Dr. Md. Zahurul Haq (BUET) HX: Energy Balance and LMTD ME 307 (2018) 2/ 21 T793
HX: Energy Balance and LMTD Dr. Md. Zahurul Haq Professor Department of Mechanical Engineering Bangladesh University of Engineering & Technology (BUET) Dhaka-000, Bangladesh http://zahurul.buet.ac.bd/
More informationNEGST. New generation of solar thermal systems. Advanced applications ENEA. Comparison of solar cooling technologies. Vincenzo Sabatelli
NEGST New generation of solar thermal systems Advanced applications Comparison of solar cooling technologies Vincenzo Sabatelli ENEA vincenzo.sabatelli@trisaia.enea.it NEGST Workshop - Freiburg - June
More informationSEM-2016(03)-II MECHANICAL ENGINEERING. Paper -11. Please read each of the following instructions carefully before. attempting questions.
Roll No. Candidate should write his/her Roll No. here. Total No. of Questions : 7 No. of Printed Pages : 8 SEM-2016(03)-II MECHANICAL ENGINEERING Paper -11 Time : 3 Hours ] [ Total Marks : 300 Instructions
More informationOn-Line Models for Use in Automated Fault Detection and Diagnosis for HVAC&R Equipment
On-Line Models for Use in Automated Fault Detection and Diagnosis for HVAC&R Equipment H. Li and J.E. Braun, Purdue University ABSTRACT To improve overall fault detection and diagnostic (FDD) performance,
More informationSolenoid valve Types CSV 2 - CSV 22 (NC) and solenoid coil
Data sheet Solenoid valve s CSV 2 - CSV 22 (NC) and solenoid coil CSV is a direct or servo-operated solenoid valve for liquid, suction, and hot gas lines with fluorinated refrigerants. CSV valves are for
More informationSpring_#7. Thermodynamics. Youngsuk Nam.
Spring_#7 Thermodynamics Youngsuk Nam ysnam1@khu.ac.kr You can t connect the dots looking forward; you can only connect them looking backwards. So you have to trust that the dots will somehow connect in
More informationTwo mark questions and answers UNIT I BASIC CONCEPT AND FIRST LAW SVCET
Two mark questions and answers UNIT I BASIC CONCEPT AND FIRST LAW 1. What do you understand by pure substance? A pure substance is defined as one that is homogeneous and invariable in chemical composition
More informationCHAPTER 4 MATHEMATICAL MODELING AND SIMULATION
49 CHAPTER 4 MATHEMATICAL MODELING AND SIMULATION 4.1 INTRODUCTION Mathematical modeling is an approach in which, practical processes and systems can generally be simplified through the idealizations and
More informationValidation of IDA Indoor Climate and Energy
Technical report: Validation of IDA Indoor Climate and Energy 4.0 build 4 with respect to ANSI/ASHRAE Standard 140-2004 April 2010 Equa Simulation AB Råsundavägen 100 169 57 Solna Sweden Contents 1 Introduction
More informationMAE 11. Homework 8: Solutions 11/30/2018
MAE 11 Homework 8: Solutions 11/30/2018 MAE 11 Fall 2018 HW #8 Due: Friday, November 30 (beginning of class at 12:00p) Requirements:: Include T s diagram for all cycles. Also include p v diagrams for Ch
More informationSupply air nozzle. Dimensions. DAD-0 With flange for mounting on a wall or duct side.
A imensions A-0 With flange for mounting on a wall or duct side. Ø ( ) 0 Ø F Ø Nom 0 0 Ø A Ø B Ø E escription A is an adjustable supply air nozzle suitable for ventilation of large areas where long throws
More informationSECOND ENGINEER REG. III/2 APPLIED HEAT
SECOND ENGINEER REG. III/2 APPLIED HEAT LIST OF TOPICS A B C D E F G H I J K Pressure, Temperature, Energy Heat Transfer Internal Energy, Thermodynamic systems. First Law of Thermodynamics Gas Laws, Displacement
More informationEXPERIMENTAL INVESTIGATION OF NOISE PARAMETERS IN HVAC SYSTEMS
The 40 th International Conference on Mechanics of Solids, Acoustics and Vibrations & The 6th International Conference on Advanced Composite Materials Engineering ICMSAV2016& COMAT2016 Brasov, ROMANIA,
More informationNozzles. About Lindab. Comfort and Design. Product overview / symbols. Theory. Ceiling diffusers. Ceiling diffusers - visible.
Nozzles About Lindab Comfort and Design Product overview / symbols Theory Ceiling diffusers Ceiling diffusers - visible Plenum boxes Wall diffusers Nozzles Ventiduct Grilles Displacement diffusers VAV
More informationSINGLE. Technical Data Book. Big Ceiling for Europe (R410A, 50Hz, H/P) Model : AC***JNCDEH (ODU: AC***JXAD*H)
SINGLE Technical Data Book Big for Europe (R4A, Hz, H/P) Model : AC***JNCDEH (ODU: AC***JXAD*H) History Version Modification Date Remark Ver.1. Release SINGLE Big for Europe.4.3 Ver.1.1 Modification for
More informationSupply air beam. Contact, Overview, Index. Guideline heating and cooling. Plexus. Professor / Professor Plus. Premum / Premax / Solus.
Contact, Overview, Index Guideline heating and cooling Plexus Professor / Professor Plus Premum / Premax / Architect Polaris I & S Plafond Podium Celo Cabinett Capella Carat Fasadium Atrium / Loggia Regula
More informationHEAT CONTENT DECREASES U D R HEAT CONTENT INCREASESO. Btu/lb
Pressure (psia) LINES OF CONSTANT ENTHALPY PRESSURE P R E S S U R E R I S E S P R E S S HEAT CONTENT DECREASES U R E D R HEAT CONTENT INCREASESO P S Btu/lb Heat Content Pressure (psia) SATURATION CURVE
More informationLesson 37 Transmission Of Air In Air Conditioning Ducts
Lesson 37 Transmission Of Air In Air Conditioning Ducts Version 1 ME, IIT Kharagpur 1 The specific objectives of this chapter are to: 1. Describe an Air Handling Unit (AHU) and its functions (Section 37.1).
More informationSection A 01. (12 M) (s 2 s 3 ) = 313 s 2 = s 1, h 3 = h 4 (s 1 s 3 ) = kj/kgk. = kj/kgk. 313 (s 3 s 4f ) = ln
0. (a) Sol: Section A A refrigerator macine uses R- as te working fluid. Te temperature of R- in te evaporator coil is 5C, and te gas leaves te compressor as dry saturated at a temperature of 40C. Te mean
More informationChapter 5. Mass and Energy Analysis of Control Volumes. by Asst. Prof. Dr.Woranee Paengjuntuek and Asst. Prof. Dr.Worarattana Pattaraprakorn
Chapter 5 Mass and Energy Analysis of Control Volumes by Asst. Prof. Dr.Woranee Paengjuntuek and Asst. Prof. Dr.Worarattana Pattaraprakorn Reference: Cengel, Yunus A. and Michael A. Boles, Thermodynamics:
More informationChemical Engineering Thermodynamics Spring 2002
10.213 Chemical Engineering Thermodynamics Spring 2002 Test 2 Solution Problem 1 (35 points) High pressure steam (stream 1) at a rate of 1000 kg/h initially at 3.5 MPa and 350 ºC is expanded in a turbine
More informationWISE Damper. Active damper for Swegon s WISE System for demand-controlled ventilation QUICK FACTS
Active damper for Swegon s WISE System for demand-controlled ventilation QUICK FACTS Variable or constant flow regulation or constant pressure regulation Wireless communication via radio Integrated sensor
More informationSolenoid valves Type EVUL
Data sheet Solenoid valves EVUL EVUL solenoid valves are designed to fit into compact refrigeration systems. Available in servo operated versions they can be applied in liquid, suction, and hot gas lines.
More informationUBMCC11 - THERMODYNAMICS. B.E (Marine Engineering) B 16 BASIC CONCEPTS AND FIRST LAW PART- A
UBMCC11 - THERMODYNAMICS B.E (Marine Engineering) B 16 UNIT I BASIC CONCEPTS AND FIRST LAW PART- A 1. What do you understand by pure substance? 2. Define thermodynamic system. 3. Name the different types
More informationDEPARTMENT OF MECHANICAL ENGINEERING ME6301-ENGINEERING THERMODYNAMICS
SYED AMMAL ENGINEERING COLLEGE (Approved by the AICTE, New Delhi, Govt. of Tamilnadu and Affiliated to Anna University, chennai) Established in 1998 - An ISO 9001:2008 Certified Institution Dr. E.M.Abdullah
More informationGlide Effect on Performance
Glide Effect on Performance ASHRAE, January 2016 Bachir Bella Regis Leportier* ASERCOM Azeotropic Mixtures The azeotropic (refrigerant) mixtures are usually binary mixtures that behave like a pure fluid
More informationFeasibility Study of Replacing Steam Ejector with Liquid Ring Vacuum Pump (LRVP) in 210 MW Plant of Vijayawada Thermal Power Station (V.T.P.
Feasibility Study of Replacing Steam Ejector with Liquid Ring Vacuum Pump (LRVP) in 210 MW Plant of Vijayawada Thermal Power Station (V.T.P.S) V.SAIRAM M.Tech student, Department of Mechanical Engineering
More informationThermodynamics Introduction and Basic Concepts
Thermodynamics Introduction and Basic Concepts by Asst. Prof. Channarong Asavatesanupap Mechanical Engineering Department Faculty of Engineering Thammasat University 2 What is Thermodynamics? Thermodynamics
More information2.0 KEY EQUATIONS. Evaporator Net Refrigeration Effect. Compressor Work. Net Condenser Effect
2.0 KEY EQUATIONS Evaporator Net Refrigeration Effect Q net refrigeration effect [] = (H 1 H 4 ) lb (Refrig Flow Rate) (60) min lb min hr H 1 = leaving evaporator enthalpy lb ; H 4 = entering evaporator
More informationPerformance Comparison in Retrofit
Influence of Heat Transfer Fluid Conditions in an Evaporator on Refrigerant Performance Comparison in Retrofit (Part 2: Evaporator) Influence of Heat Transfer Fluid Conditions in an Evaporator on Refrigerant
More informationEngineering Noise Control
Engineering Noise Control Theory and practice Second edition David A. Bies and Colin H. Hansen Department of Mechanical Engineering University of Adelaide South Australia E & FN SPON An Imprint of Chapman
More informationSTUDY ON THE THERMAL PERFORMANCE AND AIR DISTRIBUTION OF A DISPLACEMENT VENTILATION SYSTEM FOR LARGE SPACE APPLICATION
STUDY ON THE THERMAL PERFORMANCE AND AIR DISTRIBUTION OF A DISPLACEMENT VENTILATION SYSTEM FOR LARGE SPACE APPLICATION K Sakai 1*, E Yamaguchi 2, O Ishihara 3 and M Manabe 1 1 Dept. of Architectural Engineering,
More informationThermal behavior and Energetic Dispersals of the Human Body under Various Indoor Air Temperatures at 50% Relative Humidity
Thermal behavior and Energetic Dispersals of the Human Body under Various Indoor Air Temperatures at 50% Relative Humidity Hakan CALISKAN Usak University, Department of Mechanical Engineering, Usak, Turkey
More informationc Dr. Md. Zahurul Haq (BUET) Thermodynamic Processes & Efficiency ME 6101 (2017) 2 / 25 T145 = Q + W cv + i h 2 = h (V2 1 V 2 2)
Thermodynamic Processes & Isentropic Efficiency Dr. Md. Zahurul Haq Professor Department of Mechanical Engineering Bangladesh University of Engineering & Technology (BUET Dhaka-1000, Bangladesh zahurul@me.buet.ac.bd
More informationTOLERANCES AND UNCERTAINTIES IN PERFORMANCE DATA OF REFRIGERANT COMPRESSORS JANUARY 2017
TOLERANCES AND UNCERTAINTIES IN PERFORMANCE DATA OF REFRIGERANT COMPRESSORS JANUARY 017 111 Wilson Blvd, Suite 500 Arlington, Virginia 01 USA +001 (703) 54-8800 Published by: TABLE OF CONTENTS SECTION
More informationDuct Design and Air Distribution Systems
Duct Design and Air Distribution Systems Introduction The chief requirements of an air conditioning duct system are: It should convey specified rates of air flow to prescribed locations It should be economical
More informationAvailable online at ScienceDirect. Procedia Engineering 121 (2015 )
Available online at www.sciencedirect.com ScienceDirect Procedia Engineering 121 (2015 ) 2176 2183 9th International Symposium on Heating, Ventilation and Air Conditioning (ISHVAC) and the 3rd International
More informationECE309 INTRODUCTION TO THERMODYNAMICS & HEAT TRANSFER. 13 June 2007
ECE309 INTRODUCTION TO THERMODYNAMICS & HEAT TRANSFER 13 June 2007 Midterm Examination R. Culham This is a 2 hour, open-book examination. You are permitted to use: course text book calculator There are
More informationEfficient Low-Lift Cooling with Radiant Distribution, Thermal Storage, and Variable-Speed Chiller Controls Part I: Component and Subsystem Models
2009, American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. (www.ashrae.org). Published in HVAC&R Research, Vol. 15, No. 2, March 2009. For personal use only. Additional reproduction,
More informationSHRI RAMSWAROOP MEMORIAL COLLEGE OF ENGG. & MANAGEMENT
B.Tech. [SEM III (ME-31, 32, 33,34,35 & 36)] QUIZ TEST-1 Time: 1 Hour THERMODYNAMICS Max. Marks: 30 (EME-303) Note: Attempt All Questions. Q1) 2 kg of an ideal gas is compressed adiabatically from pressure
More informationChapter 5. Mass and Energy Analysis of Control Volumes
Chapter 5 Mass and Energy Analysis of Control Volumes Conservation Principles for Control volumes The conservation of mass and the conservation of energy principles for open systems (or control volumes)
More informationNon- Iterative Technique for Balancing an. Air Distribution System
Non- Iterative Technique for Balancing an Air Distribution System Mauro Small Thesis presented to the Faculty of Virginia Polytechnic Institute and State University in partial fulfillment of the requirements
More informationMathematical Modelling for Refrigerant Flow in Diabatic Capillary Tube
Mathematical Modelling for Refrigerant Flow in Diabatic Capillary Tube Jayant Deshmukh Department of Mechanical Engineering Sagar Institute of Research and Technology, Bhopal, M.P., India D.K. Mudaiya
More informationSimplified calculation of sugar juice evaporator and examples of its optimisation
PL - Production lines - example Pavel Hoffman Ú 218-2002 Simplified calculation of sugar juice evaporator and examples of its optimisation Given data: Design an evaporator with 4 effects for thin juice
More informationTHERMODYNAMICS, FLUID AND PLANT PROCESSES. The tutorials are drawn from other subjects so the solutions are identified by the appropriate tutorial.
THERMODYNAMICS, FLUID AND PLANT PROCESSES The tutorials are drawn from other subjects so the solutions are identified by the appropriate tutorial. THERMODYNAMICS TUTORIAL 2 THERMODYNAMIC PRINCIPLES SAE
More informationME6301- ENGINEERING THERMODYNAMICS UNIT I BASIC CONCEPT AND FIRST LAW PART-A
ME6301- ENGINEERING THERMODYNAMICS UNIT I BASIC CONCEPT AND FIRST LAW PART-A 1. What is meant by thermodynamics system? (A/M 2006) Thermodynamics system is defined as any space or matter or group of matter
More informationIMPROVING THE PERFORMANCE OF AN AC UNIT USING CFD
3 rd HVAC Contracting Conference Evolution of HVAC Industry International Hotel Doha The City November 25-26, 2018 IMPROVING THE PERFORMANCE OF AN AC UNIT USING CFD F. Moualled Mechanical Engineering Department
More informationThe Choice of Supply Design Conditions
6 The Choice of Supply Design Conditions 6.1 Sensible heat removal If there is a continuous source of heat having an output of Q in a hermetically sealed room the temperature within the room, tr, will
More informationEUROVENT 8/12 SOUND TEST METHOD FOR DUCTED FAN COIL UNITS. FCP 2008 testing procedures FCP acoustical test method pag. 1
EUROVENT 8/12 SOUND TEST METHOD FOR DUCTED FAN COIL UNITS FCP 2008 testing procedures FCP acoustical test method pag. 1 CONTENTS 1 - PURPOSE... 3 2 - NORMATIVE REFERENCES... 3 3 - DEFINITIONS... 3 3.1
More informationME 354 THERMODYNAMICS 2 MIDTERM EXAMINATION. Instructor: R. Culham. Name: Student ID Number: Instructions
ME 354 THERMODYNAMICS 2 MIDTERM EXAMINATION February 14, 2011 5:30 pm - 7:30 pm Instructor: R. Culham Name: Student ID Number: Instructions 1. This is a 2 hour, closed-book examination. 2. Answer all questions
More informationANSI/AHRI Standard (Formerly ARI Standard ) 2006 Standard for Performance Rating of Desuperheater/Water Heaters
ANSI/AHRI Standard 470-2006 (Formerly ARI Standard 470-2006) 2006 Standard for Performance Rating of Desuperheater/Water Heaters IMPORTANT SAFETY DISCLAIMER AHRI does not set safety standards and does
More information5. Thermal Design. Objective: Control heat flow to: Maintain comfortable indoor conditions
5. Thermal Design Objective: Control heat flow to: 2. Maintain comfortable indoor conditions 3. Reduce heating/cooling loads, which reduces operating costs 4. Control vapor movement/condensation 5. Design
More informationSwirl diffusers, Variable swirl diffusers Swirl diffusers
IMP Klima, Variable swirl diffusers Swirl diffuser OD- Fixed grille For air supply or exhaust Recommended temperature difference between supplied and internal air in the room is between 0 to 0 K Low static
More information7. (2) Of these elements, which has the greatest number of atoms in a mole? a. hydrogen (H) b. oxygen (O) c. iron (Fe) d. gold (Au) e. all tie.
General Physics I Exam 5 - Chs. 13,14,15 - Heat, Kinetic Theory, Thermodynamics Dec. 14, 2010 Name Rec. Instr. Rec. Time For full credit, make your work clear to the grader. Show formulas used, essential
More informationVentilation. 6 Heat Exchangers. Air-conditioning processes. Vladimír Zmrhal (room no. 814)
Ventilation 6 Heat Exchangers Vladimír Zmrhal (room no. 814) http://users.fs.cvut.cz/~zmrhavla/index.htm Dpt. Of Environmental Engineering 1 Air-conditioning processes comfort 2 1 Dimensioning of air-conditioning
More informationA Simulation Tool for Radiative Heat Exchangers
Purdue University Purdue e-pubs International Refrigeration and Air Conditioning Conference School of Mechanical Engineering 2012 A Simulation Tool for Radiative Heat Exchangers Yunho Hwang yhhwang@umd.edu
More informationMAHARASHTRA STATE BOARD OF TECHNICAL EDUCATION (Autonomous) (ISO/IEC Certified) SUMMER 17 EXAMINATION
Important Instructions to examiners: 1) The answers should be examined by key words and not as word-to-word as given in the model answer scheme. 2) The model answer and the answer written by candidate
More informationWALL D*TA PRINT-OUT. 3 nmth ZONE
T A B L E A 4. 3 G L A S S D A T A P R I N T - O U T H T C L».>qth» H e ig h t n u «b»r C L A S S D A T A P R I N T O U T it************************************ 1*q o v»rh # n g recm oi*ion*l orient n
More informationThermodynamics I Spring 1432/1433H (2011/2012H) Saturday, Wednesday 8:00am - 10:00am & Monday 8:00am - 9:00am MEP 261 Class ZA
Thermodynamics I Spring 1432/1433H (2011/2012H) Saturday, Wednesday 8:00am - 10:00am & Monday 8:00am - 9:00am MEP 261 Class ZA Dr. Walid A. Aissa Associate Professor, Mech. Engg. Dept. Faculty of Engineering
More informationTtioning cooling load for sizing cooling equipment and a general
CHAPTER 28 NONRESIDENTIAL COOLING AND HEATING LOAD CALCULATIONS COOLING LOAD PRINCIPLES... 28.1 Space Cooling Load Calculation Techniques... 28.2 Initial Design Considerations... 28.4 Heat Gain Calculation
More informationThe Effects of Friction Factors on Capillary Tube Length
The Effects of Friction Factors on Capillary Tube Length M.A. Akintunde, Ph.D. Department of Mechanical Engineering, Federal University of Technology, P.M.B. 7, Akure, Nigeria. E-mail: ajyinka@yahoo.com
More informationData Analysis and Mechanical System Performance. Denver Art Museum August 15-16, 2012
Data Analysis and Mechanical System Performance Denver Art Museum August 15-16, 2012 Data Analysis Reading graphs Overlay of indoor and outdoor dew point graphs What you can learn about your mechanical
More informationLecture 35: Vapor power systems, Rankine cycle
ME 00 Thermodynamics I Spring 015 Lecture 35: Vapor power systems, Rankine cycle Yong Li Shanghai Jiao Tong University Institute of Refrigeration and Cryogenics 800 Dong Chuan Road Shanghai, 0040, P. R.
More information