Theoretical analysis and practice about comprehensive energy utilizing systems of lake water source heat pump

In this paper the advantages and disadvantages of both air source heat pump and traditional water source heat pumps are analyzed, and the systems of synthetical energy utilizing of lake water source heat pump are derived from practice. Cooling water of air conditioning in summer, heat water of air conditioning in winter, bathing water and swimming water in all seasons are obtained by this system. The principle and type of this system is expounded. Mathematical models of lake water temperature are established. Experiment of the system of synthetical energy utilizing of lake water source heat pump has been carried out in Liaocheng, Shandong Province, China. Pattern and operating condition of this system is discussed. Primary cost and operating expenses between this system and the traditional heat pumps system are compared. The result of this study is of great interest to the people working in the field of lake water source heat pump.