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1 Tel Fax Product documentation Solar collector Type Fercher F 3000 FERNETT ENERGY SOLUTIONS LLC, 661 Ashanti Farm Rd. - Gordonsville, VA 22942

2 FERNETT Dust Separator - Exhaust Airt - Wastewater - Energy Tel Fax info@mnettekinternational.com Fercher s* Solar Installation at the Hotel Europapark in Tirana / Albanien Project data: 200 m² Solar collector absorber area Type Fercher F3000 for the hotel s hot water preparation; the solar energy gain amounts to 1.2 million liters hot water with a temperature of 45 to 60 degree Celsius annually [113 to 140 degree Fahrenheit]. *Fercher is Fernett s European Partner Company Fernett Energy Solutions LLC Ashanti Farm Rd. - Gordonsville, VA 22942

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4 Data Sheet for Solar Collector Type Fercher* F 3000 Mounting hole LL = 2080mm=81.88 LA =ca. 2000mm=78.74 Rivet nut M8 B = 1006mm=39.60 E = 503mm=19.80 l = 783mm=30.83 BA = 945mm=37.20 BL = 946mm=37.24 a = 28mm=1.10 Copper pipe Diameter18 mm=0.70 Wall thickness 1 mm=0.03 h = 66mm=2.59 b = 70 L =2141mm=84.29 Rivet nut M8 F =26mm=1.02 H =95mm=3.74 Casing : Lenght L mm 1.5 mm Aluminiumblech gekantet, an den Ecken Width B mm 2.15 m 2 durchgehend geschweißt und purpurrot lackiert Height H 95 mm Light entry area : Lenght LL mm Highly transparent, impact proof, 4 mm strong one pane safety glas (2095 x 960 mm) Width BL 946 mm 1.97 m 2 Absorber area : Lenght LA mm High performance heat exchanger out of flat pressed Cu pipes (only flat pressed area) Width BA 945 mm 1.88 m 2 Mounting : Rivet nut M8 mm One aluminum form pipe welded per each face side Width E 503 mm Mounted by rivet nut M8 Height F 26 mm Collector connections : 2 copper pipe Æ 18 x 1 mm Connection length a 28 mm Connection pipe b 70 mm Height h 66 mm Pipe distance l 783 mm Total weight without fluids : ca lbs./ ca. 66 kg Fill volume : ca. 5,5 l Max. allowed operating pressure : 6 bar Normal idling temperature : 136 C Recommended heat transfer fluid : 1/3 Antifreeze, 2/3 Water Installation only in serial connection (max. 30 collectors) FERNETT Dust Separator - Exhaust Airt - Wastewater - Energy Calculation of the flow through amount in l/h in serial connection: Winter operation: Spring, autumn operation: Summer operation: Example for 10 collectors Winter Spring, autumn Summer : : : D = N. 7 D = N. 16 D = N. 30 D = = 70 l/h D = = 160 l/h D = = 300 l/h D... Flow through in l / h N... Number of collectors *Fercher is Fernett s European Partner Company Tel Fax info@mnettekinternational.com Fernett Energy Solutions LLC Ashanti Farm Rd. - Gordonsville, VA 22942

5 Temperature probe installation FERCHER Solar Collector Type F 3000 Sectional viewa-a Cable duct with strain relief Detail X 783mm=30.83 Connection pipe middle - middle 18x1mm= mm= mm=2.75 Temperature probe FKP6 135mm= mm= 1.18 Probe cable ca. 1.5m= mm=9.05 Detail X: Screw-in part Probe casing welded onto the underside of the flat pipes Sheet metal basin for collectors Temperature feeler RESOL Type FKP6: Probe cable ca. 1.5m=59.05 Probe cable ca. 1.5m=59.05 Rubber plate mm=1.77 A A Probe installation The cable duct with strain relief is already screwed into the collector basin. The screw-in part has to be loosened completely or taken off to enable the installation of the temperature probe. Make sure that the probe is fully inserted into the collector s probe casing. The screw-in part is now securely tightened, thus fixing the rubber plate by pressing down on the probe cable. FERNETT info@mnettekinternational.com Dust Separator - Exhaust Airt - Wastewater - Energy Fernett Energy Solutions LLC Ashanti Farm Rd. - Gordonsville, VA Tel Fax

6 Serial connection 5 Fercher flat pipe film current collectors Use of the solar radiation per collector 73% 72% 70% 68% 65% Optical losses 20% Re-emission losses 10% Usable sun irridiation 70% Collector comparison Serial connection with parallel connection Serial connection - the big difference With the use of the serial connection, water from the solar circuit flows from the first collector into the second, from there to the third and so on. By this, the water is warmed up more and more each time: Since the first collector is cooler than for example the second, the first collector reemits less heat (reemission losses). Thus, more solar energy can be used in the first collector. The last collector uses the least amount of solar energy as this collector is already very hot and therefore reemmits a lot of heat. Parallel connection 5 conventional collectors Use of the solar radiation per collector 55% 55% 55% 55% 55% Optical losses 20% Re-emission losses 25% Usable sun irradiation 55% Parallel connection - the conventional system With the conventional parallel connection the water is led to all collectors at the same time. The solar energy heats the water in each collector to the same temperature. Thus, all collectors have the same temperature and re-emit the same amount of heat (re-emittance losses). Energy gain with serial connection To produce water at 60 C [140 F] in both cases, re-emittance losses are much lower using the serial connecting compared to the parallel connection. This results in an energy gain of 10-15% compared to the conventional parallel connection with highly selectively coated flat collectors. FERNETT info@mnettekinternational.com Dust Separator - Exhaust Airt - Wastewater - Energy Fernett Energy Solutions LLC Ashanti Farm Rd. - Gordonsville, VA Tel Fax

7 Translation of German language original School of Engineering Rapperswill HSR Oberseestrasse 10, CH-8640 Rapperswil Tel , Fax Memorandum Date: June 23, 1997 Total pages 2 From C. Müller-Schöll To Mr. J. Fercher SPF Rapperswil Company Fercher Moderne Energietechnik Re Comparative Fax No Calculation Comp.: 2 Ref. Address A-Villach Dear Mr. Fercher, You requested a comparative calculation between two different installations pursuant to the marginal conditions designated by you. The identical marginal conditions for both installations are: The installations provide warm water with a temperature of 60ºC and are operated under the continues flow heater principle. Outside temperature: 15ºC Radiation: 800 W/m 2 Collector field: 8.465m 2 absorber area. Collector field outlet temperature: 70ºC. Both collector circuits are operated with the same fluid: p= kg/l, c= 3,700 J/kgK. All processes are assumed as completely stationary for this comparative calculation. Specific conditions for the Fercher installation: 5 collectors type F30 in serial connection, ŋ 0 = 0.80, c1 = 4.94 W/m 2 K, c2 = W/m 2 K 2 (absorber coating: not solar selective solar coating) Output in the installation: 60 l/h (equals approx. 7 l/hm 2 ) Temperature increase in the collector field Fercher from 10ºC to 70ºC. Heat exchanger process water side: Input: 8ºC, output: 60ºC Heat exchanger collector circuit side: Input: approx 10ºC, output: approx 70ºC Page 1; June 23, 1997

8 School of Engineering Rapperswill HSR Oberseestrasse 10, CH-8640 Rapperswil Tel , Fax Specific conditions for the comparative installation: Fictitious collectors with: ŋ 0 = 0.795, c1 = 3.75 W/m 2 K, c2 = 0.01 W/m 2 K 2 (corresponds with a typical flat collector with solar selective absorber coating) Output in the installation: l/h (equals approx. 60 l/hm 2 ) Temperature increase in the collector field of the comparative installation: 63.7ºC to 70ºC. Heat exchanger process water side: Input: 8ºC, output: 60ºC Heat exchanger collector circuit side: Input: approx 63.7ºC, output: approx 70ºC Performance comparison The performance of the installations are calculated per P = c * dm/dt * T The Fercher installation puts out: P = 3,700 J/kgK * (60 l/h / 3,600 s/h) * kg/l * ( ) K = kw The comparison installation puts out: P = 3,700 J/kgK * (507.9 l/h / 3,600 s/h) * kg/l * ( ) K = kw In this operational status and with the described configuration, the Fercher installation puts out 10% more thermal performance than the compared system. It has to be noted that the two installations are constructed and operated differently. The Fercher installation is a Low flow concept with 7 l/hm 2 and an efficient heat exchanger. By contrast, the comparative installation is a concept with a high specific output of 60 l/hm 2 and a high medium collector circuit temperature. This document shall only be reproduced or otherwise used with its complete content. SPF-Solartechnik [signature] Ueli Frei Managing Director [signature] C. Müller-Schöll Test Engineer Page 2; June 23, 1997

9 Institute Rapperswill HSR Oberseestrasse 10, CH-8640 Rapperswil Tel , Fax Web: spf@solarenergy.ch Customer Translation of German language original Fercher Moderne Energietechnik GmbH Mr. J. Fercher, Graduate Engineer Bichlweg 2 A-9500 Villach Tel. +43 (04242) Tel. +43 (04242) Test report No. C345LPEN Contents Page 1 Description of the collectors Technical data of the examination subject Schematic of the collector Photograph of the collector Schematic of collector mounting Test Method and Results Test circuit Efficiency curve General observations Degree of efficiency Angle factor Pressure decrease (loss) Graphic pressure loss dependant on volume flow Table of measure values in Pa Graphic pressure loss dependant on temperature Time constant Effective thermal capacity Stagnation temperature Power output per collector Remarks... 8 Annex: Summary... 9 c345lpen.doc Page 1 of 9

10 1 Description of the collectors 1.1 Technical data of the examination subject Product data Manufacturer Fercher Moderne Energietechnik GmbH Model F3000 Type (Flat/Ev/Subat) Flat Collector Serial product Yes Drawing number EK 12DA01 Serial number /178 Manufacturing date October 98 Characteristics Gross length m Gross width m Gross height m Gross area 2.15 m 2 Aperture area 1.97 m 2 Absorber area m 2 Empty weight with cover 66 kg Empty weight without cover -- Fluid content 5.5 l Set up Collector type Flat collector Number of pipes/ 35 Absorber strips Absorber partition m Number of thermal covers in 1 serial connection Materials of covers One-panel safety glass (ESG) Strength of covers 4 mm Heat transfer medium Type Water-glycol Remarks -- Absorber Absorber materials copper Absorber strips length 1.930m Absorber strips width m Absorber strips strength - Absorber strips strength - Coating M40Li Absorber manufacturing type Flat pipe absorber Installation Sloping roof set up Yes Sloping roof installation Yes Flat roof set up Yes Flat roof installation No Flat roof set up with stand Yes Casing and insulation Casing material Aluminum Sealing material UV resistant glue Insulation material Mineral wool Strength 60 m Aperture mass 2.078m * m Operating restrictions Highest operating temperature -- Highest operating pressure 6 bar Other -- Test process Test regulation pren 12975, outdoor test Receipt test subject Dec. 17, 1998 Test start April 16, 1999 Test end May 25, 1999 Remarks regarding collector construction Flat collector with flat pipe absorber c345lpen.doc Page 2 of 9

11 1.2 Schematic of the collector Legend 1 Hydrolic connection 2 UV stable glue 3 Protection band against falling rocks 4 Cover 5 Absorber 6 Heat insulation 7 Casing basing 8 Ventilation hole 9 Collector mounting, blind hole M6 1.3 Photograph of the collector 1.4 Schematic of collector mounting Remarks Roof installation Sheet metal tiles in the mounting area c345lpen.doc Page 3 of 9

12 2 Test Method and Results 2.1 Test circuit Pic. 2.1: Test circuit for efficiency testing 2.1 Efficiency curve General observations Flow through rate in the test 198 l/h Measuring fluid 33.3 vol.% Ethylene glycol Test method Steady state Geographic position of the test area 42.2 N / 8.8 O, 417 m above sea level Collector s tilt angle Adjusted (45±5)º Collector s azimuth Adjusted (0±48)º Definition of the degree of efficiency Ŋ = Q / (A G) With: Output declaration of the collector Q And: radiation power received A G With: reference area A And: radiation power G Equation of efficiency curve Ŋ = Ŋ 0 a 1 T * *2 m -a 2 G T m With: reduced temperature difference * T m = (T m T a ) / G With: average collector temperature T m And: ambient temperature T a Global radiation power for the demonstration of the curves G = 800 W/m 2 c345lpen.doc Page 4 of 9

13 2.1.1 Degree of efficiency Graphic: Pic. 2: Degree of efficiency at G = 800 W/m 2 Parameters for equation of characteristic curves Reference area Absorber area Aperture area Gross area Ŋ 0 (-) a 1 (W/m 2 K) a 2 (W/m 2 K) c345lpen.doc Page 5 of 9

14 2.2 Angle factor Measurement values 0º 10º 20º 30º 40º 50º 60º 70º 80º 90º K e (longitudinal) K e (transversal) Pressure decrease (loss) Graphic pressure loss dependant on volume flow Pic. 2.3: Pressure loss as a function of volume flow Table of measure values in Pa T (ºC) V (l/h) ºC ºC ºC c345lpen.doc Page 6 of 9

15 Graphic pressure loss dependant on temperature 2.4 Time constant Was not measured 2.5 Effective thermal capacity Was not measured 2.6. Stagnation temperature Stagnation temperature at G = 1000 W/m 2 and t a = 30ºC T Stag = 133ºC Remark: Temperature probes attached from behind to an absorber pipe. 2.7 Power output per collector tm - ta 400 W/m 2 Global radiation 700 W/m W/m 2 10 K 504 K 989 K W 20 K 190 W 676 W W 50 K - W 325 W 810 W c345lpen.doc Page 7 of 9

16 3 Remarks This report shall not be reproduced in extracts without explicit written authorization. The test methods use fulfill the requirements of the regulations pren 12975, ISO , DIN 4757T4. The test results apply only to the tested collector. The report complies with the requirements pursuant to pren The report corresponds with the specifications pursuant to EN Rapperswil, August 20, 1999 [signature] Ueli Frei, Graduate Engineer Department Head Test Facility [signature] C. Müller-Schöll, Graduate Engineer Test Engineer c345lpen.doc Page 8 of 9

17 Annex: Summary (pursuant to pren12975 Annex E) Collector identification Manufacturer Fercher Moderne Energietechnik GmbH F3000 Flat collector Model Type (Flat/Ev/Subat) Serial number /178 Drawing number EK 12DA01 Dimensions Gross length m Gross width m Gross height m Gross area 2.15 m 2 Aperture area 1.97 m 2 Absorber area m 2 General information Weight 66 kg Heat transfer medium Water glycol Flow through rate (segment) l/h Pressure loss at l/h -- Operating pressure 6 bar Degree of efficiency based on aperture area Ŋ a a Degree of efficiency based on absorber area Ŋ a a Output per collector Global radiation tm - ta G = 400 W/m 2 G = 700 W/m 2 G = 1000 W/m 2 10 K 504 W 989 W W 30 K 190 W 676 W W 50 K - W 325 W 810 W Test by: SPF Solartechnik, CH-8640 Rapperswil Date: August 20, 1999 c345lpen.doc Page 9 of 9

18 Collector Test No. 345 Fercher Moderne Energietechnik GmbH, F The following test were conducted Test Tested? Section Comprehensive report* Quality test per ISO No 3 Quality test per pren No 3 Measurement of stagnation temperature Yes 3.1 C345ST Measurement of degree of efficiency per SPF Yes 4.1 LTS C345 Measurement of degree of efficiency per ISO, DIN, pren Yes 4.1 C345LPEN Angle factor (IAM) Yes 4.4 Measurement of pressure loss Yes 4.5 Measurement of heat capacity No 4.6 Measurement of time constant No 4.6 *request from manufacturer! 2. Collector description Contact Fercher Moderne Energietechnik GmbH, A-9500 Villach Tel. +43 (04242) , Fax +43 (04242) Distributed in * CH, DE, AT, *EU* Collector construction type Flat collector Collector type 1 cover, non-selective absorber Possible installations * Sloping roof installation, sloping roof set up, flat roof set up, flat roof set up with stand, façade installation Nominal volume flow * l/h Absorber coating * M40 Li Areas (absorber, aperture, gross) m 2, m 2, 2.150m 2 Gross L x W x H (in m) x x Weight with cover * 66 kg * Manufacturer s data Legend: 1 Hydraulic connection 2 UV resistant glue 3 Protection band against falling rocks 4 Cover 5 Absorber 6 Heat insulation 7 Casing basing 8 Ventilation hole 9 Collector mounting, blind hole M6 3 Quality test and quality label The collector was not quality tested. 3.1 Stagnation temperature Norm values per ISO and pren ºC / 1000 W/m 2 133ºC On behalf of the Swiss Federal Office for Energy (BFE) Page 1 of 2

19 Collector Test No Performance data (test volume flow: 198 l/h) 4.1 Characteristic curve for the degree of efficiency Measurement with wind exposure (per ISO, DIN, pren) Measurement without wind exposure (per ISO, DIN, pren) Reference area Absorber Aperture Gross Reference area Absorber Aperture Gross Ŋ 0 (-) c 0 (-) a 1 (W/m 2 K) c 1 (W/m 2 K) a 2 (W/m 2 K) c 2 (W/m 2 K) Ŋ 0 (T* m) = Ŋ 0 a 1 T* m a 2 G T* m [T* m = (t m t a)/g] Ŋ(x) = c 0 c 1 x = c 1 G x 2 [x = (t m t a)/g] t m: medium fluid temp., t a: ambient temp., G: radiation strength t m: medium fluid temp., t a: ambient temp., G: radiation strength 4.2 Characteristic values of degrees of efficiency (vertical radiation, G = 800 W/m 2 ) Reference area Absorber Aperture Gross Reference area Absorber Aperture Gross Ŋ (T* m = 0.00) Ŋ (x = 0.00) Ŋ (T* m = 0.05) Ŋ (x = 0.05) Ŋ (T* m = 0.10) Ŋ (x = 0.10) Output table (output per collector in watt, vertical, direct radiation) 400 W/m W/m W/m W/m W/m W/m 2 t m - t a= 10K t m - t a= 10K t m - t a= 30K t m - t a= 30K t m - t a= 50K t m - t a= 50K Angle factor (IAM) 0º 10º 20º 30º 40º 50º 60º 70º 80º 90º K (Ɵ), long K (Ɵ), trans Pressure loss in Pa (test media 33.3% Ethylene glycol) 100 l/h 200 l/h 300 l/h 400l/h 500 l/h 20ºC ºC ºC SPF Institute Rapperswil HSR 4.6 Heat capacity and time constant Heat capacity (kj/k) Time constant (s) Oberseestr. 10 CH-8640 Rapperswil On behalf of the Swiss Federal Office for Energy (BFE) Page 2 of 2

20 Collector Test No. 345 ANNEX: Gross heat gain, Switzerland, wind on collector level < 1.5 m/s (per SPF measuring specifications) Location Rapperswil (SG) 417 MASL North, 8.82 East All values in kwh/m 2 absorber area GH [kwh/m 2 ]: Global radiation amount, horizontal; DH [kwh/m 2 ]: Diffuse radiation amount horizontal; T a [ºC]: medium ambient temperature; HK [kwh/m 2 ]: Hemispheric radiation on collector level BWE [kwh/m 2 absorber area]: Gross heat gain of the collector at a medium collector temperature = Tm Calculation model: BWE, version 5.98 On behalf of the Swiss Federal Office for Energy (BFE) Collector No. 345 Annex

21 Collector Test No. 345 ANNEX: Gross heat gain, Switzerland, wind on collector level < 1.5 m/s (per SPF measuring specifications) Location Davos 1556 MASL 46.8 North, 9.83 East All values in kwh/m 2 absorber area GH [kwh/m 2 ]: Global radiation amount, horizontal; DH [kwh/m 2 ]: Diffuse radiation amount horizontal; T a [ºC]: medium ambient temperature; HK [kwh/m 2 ]: Hemispheric radiation on collector level BWE [kwh/m 2 absorber area]: Gross heat gain of the collector at a medium collector temperature = Tm Calculation model: BWE, version 5.98 On behalf of the Swiss Federal Office for Energy (BFE) Collector No. 345 Annex

22 Collector Test No. 345 ANNEX: Gross heat gain, Germany, wind on collector level < 1.5 m/s (per SPF measuring specifications) Location Freiburg 269 MASL 48 North, 7.85 East All values in kwh/m2 absorber area GH [kwh/m 2 ]: Global radiation amount, horizontal; DH [kwh/m 2 ]: Diffuse radiation amount horizontal; T a [ºC]: medium ambient temperature; HK [kwh/m 2 ]: Hemispheric radiation on collector level BWE [kwh/m 2 absorber area]: Gross heat gain of the collector at a medium collector temperature = Tm Calculation model: BWE, version 5.98 On behalf of the Swiss Federal Office for Energy (BFE) Collector No. 345 Annex

23 Collector Test No. 345 ANNEX: Gross heat gain, Germany, wind on collector level < 1.5 m/s (per SPF measuring specifications) Location Potsdam 81 MASL North, East All values in kwh/m 2 absorber area GH [kwh/m 2 ]: Global radiation amount, horizontal; DH [kwh/m 2 ]: Diffuse radiation amount horizontal; T a [ºC]: medium ambient temperature; HK [kwh/m 2 ]: Hemispheric radiation on collector level BWE [kwh/m 2 absorber area]: Gross heat gain of the collector at a medium collector temperature = Tm Calculation model: BWE, version 5.98 On behalf of the Swiss Federal Office for Energy (BFE) Collector No. 345 Annex

24 Collector Test No. 345 ANNEX: Gross heat gain, Austria, wind on collector level < 1.5 m/s (per SPF measuring specifications) Location Graz, 369 MASL North, East All values in kwh/m 2 absorber area GH [kwh/m 2 ]: Global radiation amount, horizontal; DH [kwh/m 2 ]: Diffuse radiation amount horizontal; T a [ºC]: medium ambient temperature; HK [kwh/m 2 ]: Hemispheric radiation on collector level BWE [kwh/m 2 absorber area]: Gross heat gain of the collector at a medium collector temperature = Tm Calculation model: BWE, version 5.98 On behalf of the Swiss Federal Office for Energy (BFE) Collector No. 345 Annex

25 Collector Test No. 345 ANNEX: Gross heat gain, Austria, wind on collector level < 1.5 m/s (per SPF measuring specifications) Location Rauris, 950 MASL North, 13 East All values in kwh/m 2 absorber area GH [kwh/m 2 ]: Global radiation amount, horizontal; DH [kwh/m 2 ]: Diffuse radiation amount horizontal; T a [ºC]: medium ambient temperature; HK [kwh/m 2 ]: Hemispheric radiation on collector level BWE [kwh/m 2 absorber area]: Gross heat gain of the collector at a medium collector temperature = Tm Calculation model: BWE, version 5.98 On behalf of the Swiss Federal Office for Energy (BFE) Collector No. 345 Annex

26 Collector Test No. 345 ANNEX: Gross heat gain, Switzerland, wind on collector level < 2.4 m/s (per EN ) Location Rapperswil (SG), 417 MASL North, 8.82 East All values in kwh/m 2 absorber area GH [kwh/m 2 ]: Global radiation amount, horizontal; DH [kwh/m 2 ]: Diffuse radiation amount horizontal; T a [ºC]: medium ambient temperature; HK [kwh/m 2 ]: Hemispheric radiation on collector level BWE [kwh/m 2 absorber area]: Gross heat gain of the collector at a medium collector temperature = Tm Calculation model: BWE, version 5.98 On behalf of the Swiss Federal Office for Energy (BFE) Collector No. 345 Annex

27 Collector Test No. 345 ANNEX: Gross heat gain, Switzerland, wind on collector level < 2.4 m/s (per EN ) Location Davos 1556 MASL 46.8 North, 9.83 East All values in kwh/m 2 absorber area GH [kwh/m 2 ]: Global radiation amount, horizontal; DH [kwh/m 2 ]: Diffuse radiation amount horizontal; T a [ºC]: medium ambient temperature; HK [kwh/m 2 ]: Hemispheric radiation on collector level BWE [kwh/m 2 absorber area]: Gross heat gain of the collector at a medium collector temperature = Tm Calculation model: BWE, version 5.98 On behalf of the Swiss Federal Office for Energy (BFE) Collector No. 345 Annex

28 Collector Test No. 345 ANNEX: Gross heat gain, Germany, wind on collector level < 2.4 m/s (per EN ) Location Freiburg, 269 MASL 48 North, 7.85 East All values in kwh/m2 absorber area GH [kwh/m 2 ]: Global radiation amount, horizontal; DH [kwh/m 2 ]: Diffuse radiation amount horizontal; T a [ºC]: medium ambient temperature; HK [kwh/m 2 ]: Hemispheric radiation on collector level BWE [kwh/m 2 absorber area]: Gross heat gain of the collector at a medium collector temperature = Tm Calculation model: BWE, version 5.98 On behalf of the Swiss Federal Office for Energy (BFE) Collector No. 345 Annex

29 Collector Test No. 345 ANNEX: Gross heat gain, Germany, wind on collector level < 2.4 m/s (per EN ) Location Potsdam 81 MASL North, East All values in kwh/m 2 absorber area GH [kwh/m 2 ]: Global radiation amount, horizontal; DH [kwh/m 2 ]: Diffuse radiation amount horizontal; T a [ºC]: medium ambient temperature; HK [kwh/m 2 ]: Hemispheric radiation on collector level BWE [kwh/m 2 absorber area]: Gross heat gain of the collector at a medium collector temperature = Tm Calculation model: BWE, version 5.98 On behalf of the Swiss Federal Office for Energy (BFE) Collector No. 345 Annex

30 Collector Test No. 345 ANNEX: Gross heat gain, Austria, wind on collector level < 2.4 m/s (per EN ) Location Graz 369 MASL North, East All values in kwh/m2 absorber area GH [kwh/m 2 ]: Global radiation amount, horizontal; DH [kwh/m 2 ]: Diffuse radiation amount horizontal; T a [ºC]: medium ambient temperature; HK [kwh/m 2 ]: Hemispheric radiation on collector level BWE [kwh/m 2 absorber area]: Gross heat gain of the collector at a medium collector temperature = Tm Calculation model: BWE, version 5.98 On behalf of the Swiss Federal Office for Energy (BFE) Collector No. 345 Annex

31 Collector Test No. 345 ANNEX: Gross heat gain, Austria, wind on collector level < 2.4 m/s (per EN ) Location Rauris 950 MASL North, 13 East All values in kwh/m2 absorber area GH [kwh/m 2 ]: Global radiation amount, horizontal; DH [kwh/m 2 ]: Diffuse radiation amount horizontal; T a [ºC]: medium ambient temperature; HK [kwh/m 2 ]: Hemispheric radiation on collector level BWE [kwh/m 2 absorber area]: Gross heat gain of the collector at a medium collector temperature = Tm Calculation model: BWE, version 5.98 On behalf of the Swiss Federal Office for Energy (BFE) Collector No. 345 Annex