Q_ck

Q_w

COP

EER

T_Hout T_Hin

T_Lout T_Lin

W

LMTD

T_L T_H

τ

q_R

K

A

H

the cooling capacity (kW)

the sanitary water heating capacity (kW)

coefficient of performance

energy effect ratio

the temperature of Fluid H at outlet or inlet (K)

the temperature of Fluid L at outlet or inlet (K)

the power of input (kW)

the logarithmic mean temperature difference (K)

the temperature of Fluid H/L (K)

the time (s)

the flow of refrigerant (kg/s)

the coefficient of heat transfer (w/(m²·K))

the area of heat transfer (m²)

the enthalpy of the working fluid (kJ/kg)