IEA Solar Heating and Cooling Programm - NachhaltigWirtschaften.at
IEA Solar Heating and Cooling Programm - NachhaltigWirtschaften.at IEA Solar Heating and Cooling Programm - NachhaltigWirtschaften.at
IEA SHC Task 38 Solar Air Conditioning and Refrigeration Subtask A Report, Date:… 1 Technical description of the plant The thermally driven adsorption SOL ACS 08 - manufactured by Sortech AG in Halle a.d.S./ Germany - generates cold water with a nominal capacity of 7,5 kW (see Figure 1). The adsorption chiller is a new development and applies innovative coating, compact construction, optimized subsystem including dry heat rejection unit, which has EC-fan technology and an additional fresh water spray mode implemented. In order to provide solar energy to the adsorption chiller 12 flat-plate collectors, with an overall gross area of 32,4 m², are mounted on a garage roof, facing south with an inclination of 40 degree. The hydraulic scheme of the overall system design shown in Figure 2 contains two thermal storages, hot water storage (2000 l) as well as cold water storage (800 l). In summer fan coils unit extract heat from several office rooms in order to control the room temperature. The three pumps around the adsorption chiller (cold water pump, heat rejection pump, hot water pump) are not designed for automatic speed level control; they have three levels of switching, which can be changed only by hand. AIT had direct access to the plant management system for changing set points and analyzed their impact on the system performance.
IEA SHC Task 38 Solar Air Conditioning and Refrigeration Subtask A Report, Date:… 2 Recording of monitoring data The solar cooling plant was installed in spring 2009 and the system operation was monitored in summer 2009 and 2010. In summer 2009 the monitoring data transfer contained gaps for the duration of some hours to several days, caused by the used monitoring recording software. Therefore, a new monitoring server was installed at AIT for summer 2010 which led to a continuous recording of monitoring data in the second summer. Approximately 75% of the monitoring data from the summer 2009 were recorded. This data represents all relevant weather conditions for Vienna. As a result, it was possible to make a first evaluation of the energy performance of the solar cooling plant. Due to the new monitoring server at AIT there weren´t any losses of monitoring data in summer 2010.
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<strong>IEA</strong> SHC Task 38 <strong>Solar</strong> Air Conditioning <strong>and</strong> Refriger<strong>at</strong>ion<br />
Subtask A Report, D<strong>at</strong>e:…<br />
1 Technical description of the plant<br />
The thermally driven adsorption SOL ACS 08 - manufactured by Sortech AG in Halle a.d.S./<br />
Germany - gener<strong>at</strong>es cold w<strong>at</strong>er with a nominal capacity of 7,5 kW (see Figure 1). The<br />
adsorption chiller is a new development <strong>and</strong> applies innov<strong>at</strong>ive co<strong>at</strong>ing, compact<br />
construction, optimized subsystem including dry he<strong>at</strong> rejection unit, which has EC-fan<br />
technology <strong>and</strong> an additional fresh w<strong>at</strong>er spray mode implemented. In order to provide solar<br />
energy to the adsorption chiller 12 fl<strong>at</strong>-pl<strong>at</strong>e collectors, with an overall gross area of 32,4 m²,<br />
are mounted on a garage roof, facing south with an inclin<strong>at</strong>ion of 40 degree. The hydraulic<br />
scheme of the overall system design shown in Figure 2 contains two thermal storages, hot<br />
w<strong>at</strong>er storage (2000 l) as well as cold w<strong>at</strong>er storage (800 l). In summer fan coils unit extract<br />
he<strong>at</strong> from several office rooms in order to control the room temper<strong>at</strong>ure. The three pumps<br />
around the adsorption chiller (cold w<strong>at</strong>er pump, he<strong>at</strong> rejection pump, hot w<strong>at</strong>er pump) are not<br />
designed for autom<strong>at</strong>ic speed level control; they have three levels of switching, which can be<br />
changed only by h<strong>and</strong>. AIT had direct access to the plant management system for changing<br />
set points <strong>and</strong> analyzed their impact on the system performance.
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