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IEA Solar Heating and Cooling Programm - NachhaltigWirtschaften.at

IEA Solar Heating and Cooling Programm - NachhaltigWirtschaften.at

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<strong>IEA</strong> SHC Task 38 <strong>Solar</strong> Air Conditioning <strong>and</strong> Refriger<strong>at</strong>ion Subtask A Report, D<strong>at</strong>e: 06/2011<br />

17%<br />

5% air conditioning<br />

space he<strong>at</strong>ing support<br />

<strong>and</strong> DHW<br />

air conditioning <strong>and</strong><br />

space he<strong>at</strong>ing support<br />

50%<br />

only air conditioning<br />

28%<br />

air conditioning<br />

<strong>and</strong> DHW<br />

Figure 7: Use of solar he<strong>at</strong>ing <strong>and</strong> cooling plants<br />

The back up str<strong>at</strong>egies also varies significantly (see Figure 8). Most of evalu<strong>at</strong>ed plants use<br />

hot side back up. Based on the experiences of monitoring it is the most critical configur<strong>at</strong>ion<br />

in terms of achieving high primary energy savings.<br />

11%<br />

hot side back up<br />

17%<br />

cold side back up<br />

55%<br />

no back up<br />

17%<br />

hot <strong>and</strong> cold side<br />

back up<br />

Figure 8: Back up str<strong>at</strong>egy of solar he<strong>at</strong>ing <strong>and</strong> cooling plants<br />

2.2.4 Planning <strong>and</strong> install<strong>at</strong>ion<br />

The install<strong>at</strong>ion period of the evalu<strong>at</strong>ed plants varies as well. It was finished in some cases<br />

within three days <strong>and</strong> reaches in some cases up to three month (see Figure 9). It is quite<br />

interesting th<strong>at</strong> it is already possible to install a solar he<strong>at</strong>ing <strong>and</strong> cooling plant within three<br />

days <strong>and</strong> a short install<strong>at</strong>ion time should be one goal for pre-engineered systems.<br />

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