多能互补的热泵系统全天供热性能实验研究

Experimental Study on All-day Heating Performance of Heat Pump System Driven with Compound Energy

根据太阳能和空气热能全天24h的分布特点,当空气温度较低时,由太阳热能与品味较低的空气热能组成复合热源,将翅片式空气换热器与盘管式换热器并联组成复合蒸发器,建立了一套多能互补的热泵系统.系统在兰州地区11月份连续运行24h,通过对试验数据分析,初步揭示了系统对3种能源的利用程度以及节能特性,定量分析双热源模式系统制热量提升机理,并从用能成本的角度得出结论:系统白天采用空气源,夜间采用双热源模式运行有其合理性.

According to the distribution of solar and air heat all day in 24 hours,when the air temperature is low,the low air thermal energy and solar heat are used as a composite heat source.A finned air heat exchanger and a coil heat exchanger were arranged in parallel as a composite evaporator;a heat pump system driven with compound energy was established.The system was in a continuous operation for 24 hours in November at Lanzhou.Through the analysis of experimental data,the degrees of utilization of the three kinds of energy and energy-saving features were initially revealed;the mechanism of enhancement of heating capacity when the system operates with the dual-source model was quantitatively analyzed.At last we made a conclusion from the perspective of the cost of energy utilization that the system running with air source in the daytime and double heat source at night is reasonable.