Heat pump supported by heat pipe solar collector

The solar heat pump supported by a heat pipe was investigated, the evaporaters of heat pipes were connected to a flat plate collector. The heat pipe condenser was constructed as an insulated pipe which had 150 mm diameter. The heat pump evaporater coil was placed into the heat pipe condenser. Ethanol was used as working fluid in the heat pipe and R12 was used in the heat pump cycle. An insulated test room was 3 constructed with 0.86x1.1x1 m dimensions and heated by heat pump having solar collector with heat pipe. The coefficient 2 of performance (R) of the heat pump having aim area collector, was evaluated.