蓄热技术在太阳能-地源热泵中的应用及模拟

从太阳能-地源热泵系统中蓄热技术的运行方式入手,通过对太阳能显热蓄热过程的模拟,指出了邯郸地区的太阳能-地源热泵采用无相变蓄热技术时,存在的问题和解决方法。同时,对相变蓄热技术在太阳能-地源热泵应用进行了探讨,并对蓄热体的蓄热过程进行了模拟与分析,结果表明:蓄热材料发生相变的时间与蓄热体半径密切相关,在实际应用时可以通过改变后者来控制前者;离外边界越远,相邻点温差越小;由于相变边界点一直低于流体温度,这将导致在8h内具有热流的存在,从而可延缓水温升高速度。

Application of heat storage in solar-assisted ground-source heat pump system and numerical simulation

The operation way of the experimental system was obtained by according to simulating the sensible heat storage of solar energy.The way to solving problem existing was pointed out when SAGSHPs have no heat storage of PCM.The application of heat storage of PCM in SAGSHPs was introduced and the procedure of heat storage of the heat storage body was simulated.The conclusion is that the time of phase change is in touch with the radius of the heat storage body,so it can be controlled later.More farther from outside,more lower the temperature difference of the point is.Because the temperature of the point outside of PCM is lower than fluent,this can produce heat flow within 8 hours,these can postpones the velocity of the temperature elevating.