Energy Labelling and Testing of Hot Water Stores, Collectors and Solar Thermal Systems
Abstract
The standing losses of two typical bivalent hot water stores have been determined according to three different standards (EN 12977-3:2012, EN 12897:2006, EN 15332:2007). The different test procedures of these three standards as well as an additional standard (EN 60379:2004) contain methods to provide the basis for the classification of hot water stores into energy efficiency classes. This classification is used to label the hot water stores according to the European Directive 2010/30/EU with different energy labels from either A to G or A+ to F. The results of the work performed show that, depending on the chosen standard or test procedure respectively, significantly different standing losses result. Therefore, a certain hot water store would be s of one standard, whereas the same store would be classified as values of the tested solar thermal system vary significantly.
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