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Table 6 COP of heat pump for DHW production at 50 °C and evaporator in external air

From: Planned energy-efficient retrofitting of a residential building in Italy

  Frequency [Hz]
T e °C 110 90 70 50 30
−7 2.19 2.22 2.19 2.06 1.79
2 2.64 2.71 2.70 2.57 2.25
7 2.97 3.06 3.04 2.94 2.57
12 3.36 3.49 3.49 3.37 2.97
20 4.15 4.35 4.36 4.24 3.74
25 4.69 4.89 4.93 4.76 4.22
30 5.21 5.44 5.47 5.29 4.66
35 5.71 5.97 6.00 5.81 5.14