Abstract
IN order to realize the energy saving potential of natural water sources, a complex system of low temperature surface water cooling and water source heat pump is proposed. Taking the actual project as an example, a LCC calculation model for engineering evaluation was established. DeST-c was used to simulate the annual energy consumption of the engineering example. The relationship between load changes of FCU and AHU is analysed when the outdoor climate and the use of building changed. The calculation of LCC was based on performance curves of water source heat pump unit and variable frequency pump. Comparing the LCC components with the hybrid system, conventional system and water source heat pump, it was found that the LCC of hybrid system was 70% of conventional system and 83% of water source heat pump. The hybrid system of low temperature surface water cooling and water source heat pump has great energy saving potential and economic benefits.
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