IEA Solar Heating and Cooling Programm - NachhaltigWirtschaften.at

IEA SHC Task 38 Solar Air Conditioning and Refrigeration Subtask A Report A-D3b, Date: December 2010
After a decrease in performance during the first operation months (inert gasses), the chiller
ACS05 was newly evacuated in August 2008. Apart from this, the operation was very
reliable. The new chiller (ACS08) did not require any service in the operation period nor
showed any degradation in its performance. The system concept is promising: no cooling
tower is required, and a fraction of the rejected heat in summer in the borehole may be
available in the low-temperature heat source during the heat pump operation mode in winter.
Another advantage is the noiseless operation of the chiller. The use of the solar resource
could be improved by using the solar heat in winter directly instead of driving the adsorption
machine. This would be advantageous as lower temperatures could be used.
Photos
22m 2 of Solvis flat-plate
collectors on the instute's
rooftop
SorTech ACS 05 chiller unit
Fraunhofer ISE institute
building. In the foreground:
installation of ground tubes
Monitoring Data
Measured period
Monitoring level (according to Task 38
procedure)
Person responsible for monitoring
Aug 2008 – July 2009 (ACS05);
Nov. 2009 – Sept. 2010 (ACS08)
3
Tomas Núez (Fraunhofer ISE, Germany)
Phone: +49 761 4588 5533
Email: tomas.nunez@ise.fraunhofer.de
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