Input to the calculations

Input to the calculations The test method for testing the heat pump refers to best testing practice e.g. EN 14511 (see document 7) except for some deviations. The test points are similar to the test points in EN14511:2007, but the temperatures of the return/feed temperature differs, se table IV.2 in the standard. In LOT 1 the temperature difference between Treturn and Tfeed gets larger the higher temperature of the Tfeed. Only three test points are necessary to calculate the seasonal energy efficiency by using this model.  
The calculation uses a temperature bin method to evaluate the seasonal energy efficiency, etas. There are three different climates to chose among, warmer (+2°C), average (-10°C) and colder (-22°C), see table I.1, LOT 10.  Each bin describes the equivalent number of hours corresponding to the bin temperature with a resolution of one bin/K. Input data