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IEA SHC Task 38 Solar Air Conditioning and Refrigeration Subtask A Report A2, November 2009 In solar cooling systems a thermally driven sorption chiller is applied for the provision of useful cooling. In this case the heat generated by the solar thermal system serves as driving force for the thermally driven chiller. Taking into account the supply of useful cooling and the transfer of the chiller’s reject heat to the ambient, a system with three subsystems is formed, as shown in Figure 2: - The solar thermal system provides heat to the desorber G of the chiller. - Reject heat of condenser (C) and absorber or adsorber (A) are released via cooling water loop and cooling tower. - Useful cooling is provided by the evaporator (E) and supplied to the consumer via the chilled water loop. solar collector heat exchanger heat storage backup hot side T T solar system 45C° T T G cooling tower heat rejection TM T cooling water C A load cold side chilled water E sorption chiller Figure 2: Basic solar cooling system: Thermally driven chiller coupled to solar thermal system, cooling water loop, and chilled water loop. 3. Composition of generic systems In order to cope with different ambient conditions, specific demand characteristics of heating and cooling, and the room-side appliances for heating and cooling, in real applications a variety of technical options is available for all three sub-systems. The different options are presented on basis of a standardized system topology according to the basic structure of the “generic system” discussed above as shown in Figure 3. For each sub-system a structural template has been defined containing placeholders for the integration of additional components. In detail, the following options are to be specified in the three sub-systems. Solar sub-system: - Solar collector page 3
IEA SHC Task 38 Solar Air Conditioning and Refrigeration Subtask A Report A2, November 2009 - Heat exchanger - Heat storage - Backup-heater Heat rejection sub-system: - Main cooler - Auxiliary cooler - Heat exchangers for separation of primary and secondary cooling loop Chilled water sub-system: - Load: Room-side cooling appliance - Distribution of chilled water to the cooling appliances - Cold (chilled water) storage - Backup chiller solar collector heat exchanger heat storage backup hot side T T 45C° T G T main cooler heat exchanger auxiliary cooler heat exchanger TM heat rejection C T A load distribution cold storage backup cold side E Figure 3: Generic system: standardized system topology with placeholders for the integration of optional system components. In the following sections, typical constellations and alternative components for the three sub-cycles are presented. For each placeholder all relevant options together with a characterisation of technical and operational aspects are given. page 4
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Endbericht Solare Kühlung und Klim
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Task 38 Solar Air-Conditioning and
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Pompe évaporateur + compteur C3 Dr
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80 70 Temperature (°C) 60 50 40 3
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Power (kW) 20 19 18 17 16 15 14 13
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Power (kW) 20 19 18 17 16 15 14 13
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79 Spain Private House Olivares-Sev
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Questionnaire for Owners of Small-S
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Grundprinzip Solare Wärme thermisc
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Hintergrund Operating Agent: Hans-M
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- Leistungsvergleich von verfügbar
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Subtask A: Pre-engineered systems f
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Abb. 3: Das Bürogebäude in St. Sc
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Beispiele realisierter großer Syst
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a) b) c) Abb. 9: Installation eines
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Subtask C: Modelling and fundamenta
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Liste der Systeme im Monitoring von
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Tekniker Centro Tecnológico Teknik
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IEA Solar Heating and Cooling Programm - NachhaltigWirtschaften.at

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