三套管蓄能型热泵在非常定工况下的实验

Unconventional experimental investigation on the triple-sleeve energy exchanger based energy storage heat pump

摘要:

为制定三套管蓄能型热泵在极端工况下的运行策略,验证其在运行状态下切换换热设备的稳定性与可靠性,对一台2HP样机进行了室外高/低温及切换条件下的实验. 结果表明:在室外干球温度38～43 ℃工况下,三套管蓄能器与空气源热泵联合供冷的COP为2.8～2.4,较相同条件下的空气源热泵单独供冷COP高17%；在室外干球温度-17～-10 ℃工况下,太阳能辅助三套管蓄能器供热的COP为2.8,较相同条件下的空气源热泵单独供热COP高65%；样机在运行状态下切换换热器会造成运行参数的小幅度波动,但可于420 s内恢复稳定,证实了样机运行的可靠性.

Abstract:

To develop an operating strategy under unconventional conditions for the triple-sleeve energy exchanger (TRESE) based energy storage heat pump system, and to validate stability and reliability at heat exchangers switchover moment for an operating system, a series of unconventional experiments were carried out by using a 2HP prototype. Experimental results indicated that cooling COP of TRESE assisted air source heat pump was 2.8-2.4,7% higher than that of an air source heat pump alone, when ambient temperature was 38-43 ℃. Its heating COP with solar energy assisted could be 2.8 while ambient temperature was -17--10 ℃, 65% higher than that of an air source heat pump alone. On the other hand, switchover of heat exchangers triggered slight fluctuation of operation parameters for operating prototype, while the duration for restoration of stability was less than 420 s, which verified the reliability of the prototype.