Division 7 Seasonal space heating energy efficiency of heat pumps using internal combustion engine:

The seasonal space heating energy efficiency η_s,h shall be calculated on the basis of the seasonal primary energy ratio in heating mode SPER_h , corrected by contributions accounting for temperature control and, for water/brine-to-water heat pumps only, the electricity consumption of ground water pump(s).

The seasonal primary energy efficiency ratio in heating mode SPER_h shall be calculated on the basis of seasonal gas utilisation efficiency in heating mode SGUE_h , the seasonal auxiliary energy factor in heating mode SAEF_h taking into account the conversion coefficient for electricity CC.

The seasonal gas utilisation efficiency in heating mode SGUE_h shall be based on the part load for heating P_h (T_j ) divided by the bin-specific gas utilisation efficiency when heating at partial load GUE_h,bin , weighted by the bin-hours the bin conditions occurs, using the conditions set out below;

The SAEF_h shall be based on the reference annual heating demand Q_H and the reference annual energy consumption for heating Q_HE ;

The reference annual heating demand Q_H shall be based on the design heating load P_design,h multiplied by the annual equivalent active mode hours H_HE as set out in Table 29;

The annual energy consumption for heating Q_HE shall be calculated as the sum of:

1. (1)

   the ratio of the reference annual heating demand Q_H and the seasonal auxiliary energy factor in heating mode in active mode SAEF_h,on ; and

2. (2)

   the energy consumption during thermostat-off, standby, off and crankcase heater mode during the designated season;

The SAEF_h,on shall be based (insofar as relevant) on the part load for heating P_h (T_j ) and the auxiliary energy factor in heating mode at partial load AEF_h,bin , weighted by the bin-hours the bin conditions occurs using the conditions set out below;

The conditions to calculate the SGUE_h and the SAEF_h,on shall take into account:

1. (1)

   the reference design conditions set out in Table 24;

2. (2)

   the European average heating season set out in Table 26;

3. (3)

   if applicable, the effects of the degradation of the energy efficiency caused by cycling depending on the type of control of the heating capacity.