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IEA SHC Task 38 Solar Air Conditioning and Refrigeration Subtask A Report, Date: November 2010 2 System Design In Figure 2 the hydraulic scheme of the installed system in Gröbming is shown. There are two solar collector fields, one on the ground with 30.2 m 2 and the second is integrated in the façade with 15.8 m 2 . From the solar collectors the heat flows through a heat exchanger to the hot water storage. Three 1500 liter water storages connected in series are used to store the solar energy. Depending on the return temperature from the heat exchanger the medium is stratified to the hot medium or cold storage. In winter the return flow from the distribution systems is delivered into storage 1 and in summer, when the cooling mode is running, into storage 3. Out of storage 3 the hot water can be distributed to different recipients, the domestic hot water station, the absorption chiller, the swimming pool as well as the space heating for the building. This can also be done alternatively from storage 1 or 2 if the temperature is sufficient. Figure 2: Hydraulic scheme of the solar cooling system in Gröbming From the central distribution station the hot water is spread to the different recipients. In summer time, when the cooling mode is enabled, the chilled water is also distributed through the same central distributor station. The recooling water loop connects the absorption chiller directly to the wet cooling tower. The absorption chiller PSC-12 is located outside the building. As a consequence of this location, twice a year a maintenance worker has to discharge and charge the hydraulic cycles of the absorption chiller as well as of the cooling tower before and after the winter period to avoid freezing damages. page 4
IEA SHC Task 38 Solar Air Conditioning and Refrigeration Subtask A Report, Date: November 2010 All in all nine auxiliary pumps as well as five distribution pumps are installed in the system. To control the plant two Technische Alternative (TA) UVR1611 controllers are included. The monitoring task is done by separate devices installed by the company RKG. This system design was chosen because of the easy and cheap integration feasibility in the solar combi system. The solar system and even the cold distribution system were there anyway, only the cold production had to be added. The main problems encountered were caused by the solar system. It was designed originally as a low-flow-system. To drive the absorption chiller higher volume flows are necessary to reach the nominal power. Therefore the pumps of the solar pumping station had to be changed and the loading strategy for the buffer tanks had to be optimized. Figure 3: View of the utility room [upper left, Bachler], the outside situation with the wet cooling tower and the absorption machine [upper right, Bachler] and the inside of the cooling machine [lower left / right, Pink] page 5
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Endbericht Solare Kühlung und Klim
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Task 38 Solar Air-Conditioning and
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IEA SHC Task 38 Solar Air Condition
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3.1 Adsorption Systems Table 1: Ads
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4 Heat Rejection There is a number
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IEA SHC Task 38 Monitoring Procedur
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Table of tables Table 1 List of ele
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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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Cuestionario para propietarios de i
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Questions to Package Solution Provi
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9. Maintenance o What type of maint
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Grundprinzip Solare Wärme thermisc
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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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Liste der Systeme im Monitoring von
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Marletta, L., Evola, G. and Sicurel
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Ellehauge & Kildemoes Vestergade 48
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Tekniker Centro Tecnológico Teknik
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IEA Solar Heating and Cooling Programm - NachhaltigWirtschaften.at

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