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:… 5 Monitoring Results 5.1 Annual / Monthly Data As figure 5 shows the specific collector yields as well as the collector efficiency tend to be slightly higher in 2010 than the monthly values in 2009. A reason for this tendency can be a reduced shading of the collector in 2010 compared to 2009. In 2009 a scaffold shaded the collector. 2009 / 2010 Monthly specific collector yield*; Collector efficiency* Yield 2009 Yield 2010 Coll. efficiency 2009 Coll. efficiency 2010 80 40 Collector yield [ kWh/m² ] 70 60 50 40 30 20 10 35 30 25 20 15 10 5 Collector efficiency [ % ] . 0 0 0 2 4 6 8 10 12 14 Monthly Irradiation Sum (collector plane) [ MWh ] Figure 5: Monthly values of the specific collector yield and the collector efficiency in 2009 and 2010 (up to and including October 2010) plotted against the monthly irradiation sum on the collector plane. The values refer to the heat which the collector supplied to the storage; * includes returned heat to collector; no storage losses considered. Source: Fraunhofer ISE
IEA SHC Task 38 Solar Air Conditioning and Refrigeration Subtask A Report, Date:… 2009 / 2010 Monthly thermal COP AbCh 1, 2009 AbCh 1, 2010 AbCh 2, 2010 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 Monthly cold production [ MWh ] Figure 6: Monthly values of the thermal COP of the absorption chillers plotted against the monthly produced cold in 2009 and until September 2010. The cold which was produced by the absorption chiller 2 in June and September 2010 was very low. In June the chiller 2 started its proper operation at the end of the month and in September there was only little cooling load. Source: Fraunhofer ISE 2009 Collector efficiency* [%] Share of solar heat returned to collector [%] Share of solar heat on total heat input*** [%] COP thermal absorption chiller 1 [-] COP electric absorption chiller 1 [-] January 11.5 57.4 4.1 --- --- February 26.9 20.6 16.5 --- --- March 37.0 6.7 48.7 --- --- April 29.2 9.4 100 --- --- May 29.7 5.0 92.8 0.39 2.9 June 25.2 7.1 100 0.55 4.6 July 28.7 4.3 100 0.56 5.4 August 31.1 3.5 100 0.53 5.0 September 31.5 4.7 100 0.58 5.6 October 26.5 12.6 29.8 0.37 2.4 November 14.0 39.5 5.1 --- --- December < 0 ** 165.2 < 0 ** --- --- Annual 27.7 10.8 40.6 0.53 4.7 * includes returned heat to collector; no storage losses considered ** collector yields slightly below heat for freezing protection *** corrections in winter due to measurement error in heat input from gas boiler Table 1: Monthly and annual balances for some system operation data of 2009. In the heating season when the gas boiler is in operation the share of solar heat is based on an estimate because the heat input of the boiler into the storage was measured incorrectly due to pollution in the hydraulic circuit. The values were adjusted by fixing the monthly hot water storage losses at 10% in winter. Source: Fraunhofer ISE
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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 />
5 Monitoring Results<br />
5.1 Annual / Monthly D<strong>at</strong>a<br />
As figure 5 shows the specific collector yields as well as the collector efficiency tend to be<br />
slightly higher in 2010 than the monthly values in 2009. A reason for this tendency can be a<br />
reduced shading of the collector in 2010 compared to 2009. In 2009 a scaffold shaded the<br />
collector. <br />
2009 / 2010<br />
Monthly specific collector yield*;<br />
Collector efficiency*<br />
Yield 2009 Yield 2010 Coll. efficiency 2009 Coll. efficiency 2010<br />
80<br />
40<br />
Collector yield<br />
[ kWh/m² ]<br />
70<br />
60<br />
50<br />
40<br />
30<br />
20<br />
10<br />
35<br />
30<br />
25<br />
20<br />
15<br />
10<br />
5<br />
Collector efficiency<br />
[ % ] .<br />
0<br />
0<br />
0 2 4 6 8 10 12 14<br />
Monthly Irradi<strong>at</strong>ion Sum (collector plane) [ MWh ]<br />
Figure 5: Monthly values of the specific collector yield <strong>and</strong> the collector efficiency in 2009<br />
<strong>and</strong> 2010 (up to <strong>and</strong> including October 2010) plotted against the monthly irradi<strong>at</strong>ion sum on<br />
the collector plane. The values refer to the he<strong>at</strong> which the collector supplied to the storage;<br />
* includes returned he<strong>at</strong> to collector; no storage losses considered. Source: Fraunhofer ISE
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