IEA Solar Heating and Cooling Programm - NachhaltigWirtschaften.at

IEA SHC Task 38 Solar Air Conditioning and Refrigeration
Subtask A Report, Date:…
5.2 Thermal COP
The Thermal COP can be calculated and followed every two minutes thanks to an efficient
monitoring. It is then possible to draw the thermal COP during one day.
The Figure 3 shows the thermal COP of the Chambery installation on the 14 th July 2009.
Figure 3: Thermal COP of the Chamberry installation on 14/07/2009
Looking at this day the Rotartica chiller exhibited an excellent (high and stable) coefficient of
performance.
The chiller started on 14/07/2009 at about 12:50 and stopped in the evening around 5:10pm.
During this time as the installation was producing cold, the internal thermal COP of the chiller
was about 0,8 which is an excellent value even for an absorption chiller.
If the overall working period is studied, the thermal COP can be calculated month by month,
and are showed on Table 3and on Figure 4:
Table 3: Thermal COP of the Chambery installation during the working period
May Jun Jul Aug Sep Oct May Jun Jul
2009 2009 2009 2009 2009 2009 2010 2010 2010
0,68 0,68 0,73 0,70 0,73 0,75 0,75 0,72 0,72