The conditions

The conditions for measurements in a laboratory and in field differ with respect to various factors e.g. the boundary conditions. SPF1 in field measurements includes the electrical energy from the heat source brine pump, while “average COP” and “SCOPnet” only includes the head losses. This could make the electrical energy use a little larger for the field measurements, but on the other hand “average COP” and “SCOPnet” also contain head losses for the heat sink side which SPF1 does not. The electrical energy from the heat sink pump for SPF1 is included in SPF3.