冷凝热回收技术在区域能源站中的应用研究

Research on Application of Condensing Heat Recovery Technology in Regional Energy Station

本文针对广东某区域能源站需要长期进行供冷和供应生活热水的需求,设计了一种基于冷凝热回收技术的离心式水源热泵蓄热供热系统,该系统通过回收区域能源站夜间进行蓄冰的冰蓄冷双工况主机冷却侧散热量作为水源热泵的热源,制取高温热水进行蓄热供热,实现低品位冷凝热向可再生能源的转化,结合峰谷电价有效降低系统运行费用,并通过全年逐时能耗仿真计算,对比分析了采用空气源热泵供热系统和电热锅炉供热系统的经济性及节能水平。结果表明,冷凝热回收的系统全年能效可达3.75,相对于空气源热泵系统实现节能50.9%,节费72.4%,相对于电热锅炉系统节能77.9%,节费87.6%;冷凝热回收系统的能源成本降低至0.11元/kWh,相对于空气源热泵系统降低72.3%,相对于电热锅炉系统降低87.5%。

Aiming at the demand of a regional energy station in Guangdong province for long-term cooling and domestic hot water supply,this paper designs a centrifugal water source heat pump heat storage and heating system based on condensation heat recovery technology.The system recyles the heat dissipated by the cooling side of the main engine under the ice storage and cooling condition of the regional energy station at night as the heat source of the water source heat pump to produce high temperature hot water for heat storage and heating.To realize the conversion of low-grade condensing heat to renewable energy,combined with the peak and valley electricity price to effectively reduce the operating cost of the system,and through the annual hourly energy consumption simulation calculation,the economy and energy saving level of the air source heat pump heating system and the electric boiler heating system are compared and analyzed.The results show that the annual energy efficiency of the condensing heat recovery system can reach 3.75,saving 50.9%and 72.4%compared with the air source heat pump system,and saving 77.9%and 87.6%compared with the electric boiler system.The energy cost of the condensing heat recovery system is reduced to 0.11 yuan/kWh,72.3%lower than that of the air source heat pump system and 87.5%lower than that of the electric boiler system.