FORSCHUNGS- UND TESTZENTRUM FÜR SOLARANLAGEN Institut für Thermodynamik und Wärmetechnik Universität Stuttgart in Kooperation mit Professor Dr. Dr.-Ing. habil. H. Müller-Steinhagen Information Sheet Thermal Performance of a Factory Made Thermal Solar Domestic Hot Water System based on test report 09SYS81, ITW, University of Stuttgart, January 8 th 2010 Stuttgart, January 11 th 2010 Client Manufacturer Brand name Energie, est Zona Industrial de Laúndos, Lote 48 4570-311 Laúndos Póvoa de Varzim, Portugal Energie, est Eco 300IS Year of production 2009
Information Sheet based on test report No. 09SYS81 page 2 of 8 1 General specifications (acc. to manufacturer) Manufacturer Energie est Zona industrial de Laúndos, Lote 48, 45730-311 Laúndos Póvoa de Varzim, Portugal Contact person Type Serial product or prototype Tiago Costa Tel.: + 351-252-600230 Fax: + 351-252-600239 E-Mail: tiagocosta@energie.pt Eco 300IS Serial no. 12234 year of production 2009 serial product Description of the system 1) Absorber 2) Hot water store 3) Soloar loop heat exchanger 4) Auxiliary emergency heater 5) Compressor 6) Accumulator for refrigerant 7) Thermostatic expansion valve 8) Magnesium anode The system under investigation is a solar domestic hot water system in which the solar loop operates on the principle of a heat pump. It is composed of two unglazed absorber with 3.20 m² total aperture area, an insulated, stainless steel hot water store (300 l), a so-called thermoblock, which comprises the electrical powered compressor, the thermostatic expansion valve, the electrical heating element and the controller. The heat transfer fluid in the solar loop is the refrigerant R134a. The refrigerant is passing the absorber and evaporates while collecting energy from the surroundings. The evaporated refrigerant is sucked by the compressor which raises the pressure. In the condenser, which is integrated as an immersed solar-loop heat exchanger in the lower part of the store, the refrigerant condenses while transferring its condensing heat to the domestic water in the store. Before the refrigerant is returning to the absorber, a thermostatic expansion valve is reducing the pressure. As emergency heater an electrical heating element is located in the lower part of the store at the height of the solar-loop heat exchanger.
Information Sheet based on test report No. 09SYS81 page 3 of 8 Total store volume No. of collectors or absorbers respectively 300 l 2 Total collector area (aperture) 3.20 m² 2 Thermal performance characterisation Based on the results of the thermal performance characterization indicated in the test report 09SYS81, ITW, University of Stuttgart, January 8 th 2010 the following performance indicators can be determined using the equation specified below: Solar fraction Coefficient of Performance () Seasonal Performance Factor () Energy amount from renewable energy (solar irradiation, ambient heat) to cover the hot water demand () f sol L L d L par par s, a L par
Information Sheet based on test report No. 09SYS81 page 4 of 8 Draw-off: 100 %, 6 hours after solar noon on annual base for a demand volume of 200 l/d 11056 10669 4217 1018 96.5 2.77 2.53 6453 10601 10511 4016 1100 99.1 2.89 2.62 6495 11995 11382 4502 889 94.9 2.73 2.53 6879 8239 8239 2856 1214 100.0 3.31 2.88 5383 8632 8632 2833 1208 100.0 3.47 3.05 5799 on annual base for a demand volume of 250 l/d 13820 13206 4993 926 95.6 2.83 2.64 8213 13252 13078 4821 1023 98.7 2.93 2.71 8258 14993 14001 5217 760 93.4 2.83 2.68 8784 10298 10298 3428 1177 100.0 3.35 3.00 6870 10791 10790 3421 1170 100.0 3.50 3.15 7369
Information Sheet based on test report No. 09SYS81 page 5 of 8 on annual base for a demand volume of 300 l/d 16583 15188 5507 838 91.6 2.91 2.76 9681 15902 15100 5372 945 95.0 2.99 2.81 9728 17992 15884 5604 654 88.3 2.95 2.83 10281 12358 12074 3879 1136 97.7 3.41 3.11 8195 12949 12619 3881 1128 97.5 3.54 3.25 8738 on annual base for a demand volume of 400 l/d 22111 16240 5730 792 73.4 2.97 2.83 10510 21203 16241 5630 901 76.6 3.04 2.88 10610 23989 16786 5738 606 70.0 3.03 2.93 11049 16477 13279 4144 1108 80.6 3.47 3.20 9135 17265 13824 4147 1098 80.1 3.60 3.33 9677
Information Sheet based on test report No. 09SYS81 page 6 of 8 Draw-off: at 7 00 : 40 %; at 12 00 : 20 %; at 19 00 : 40% on annual base for a demand volume of 200 l/d 11056 10699 4110 1057 96.8 2.86 2.60 6589 10601 10524 4000 1122 99.3 2.91 2.63 6524 11995 11349 4230 953 94.6 2.91 2.68 7118 8239 8239 2789 1221 100.0 3.39 2.95 5450 8632 8632 2867 1211 100.0 3.43 3.01 5766 on annual base for a demand volume of 250 l/d 13820 13275 4866 1053 96.1 2.94 2.73 8409 13252 13106 4708 1119 98.9 3.02 2.78 8398 14993 13990 4897 945 93.3 3.05 2.86 9093 10298 10298 3324 1210 100.0 3.46 3.10 6974 10791 10791 3379 1198 100.0 3.55 3.19 7411
Information Sheet based on test report No. 09SYS81 page 7 of 8 on annual base for a demand volume of 300 l/d 16583 15807 5520 1032 95.3 3.05 2.86 10288 15902 15675 5362 1111 98.6 3.13 2.92 10313 17992 16506 5443 910 91.7 3.20 3.03 11063 12358 12358 3771 1223 100.0 3.60 3.28 8587 12949 12949 3728 1212 100.0 3.80 3.47 9220 on annual base for a demand volume of 400 l/d ** ** ** 22111 20668 6843 916 93.5 3.15 3.02 13825 21203 20761 6771 1026 97.9 3.22 3.07 13990 23989 21261 6681 784 88.6 3.30 3.18 14580 16477 16477 4691 1204 100.0 3.77 3.51 11786 17265 17265 4727 1189 100.0 3.90 3.65 12537