CO2跨临界水-水热泵系统实验研究

对CO2跨临界水-水热泵系统进行研究,并搭建实验台进行测试:系统中添加回热器与否的两种情况下,通过改变蒸发温度、冷冻水的流量和温度、冷却水的流量和温度,测试系统的制热系数COPh和制冷系数COP。结果表明,蒸发温度升高,系统的COPh、COP也随之增加;而冷冻水流量增加,系统的COPh、COP增加不明显;增加回热器后随着冷冻水温度升高,系统COPh和COP上升趋势显著;冷却水流量增加对系统性能的影响很大;随着冷却水温度的升高,系统的换热量降低,导致系统的COPh和COP随之降低。通过以上实验证明在相同的工况下,添加回热器可提高系统的性能。

Experimental study on transcritical CO2 water to water heat pump system

In this paper, transcritical CO2water to water heat pump system was experimentally studied and an experimental bench was set up for experimental testing. In the case of a regenerator and no regenerator in the system, the heating coefficient COPh and the COP of the system were tested by changing the evaporation temperature, chilled water flow, chilled water temperature, cooling water flow and cooling water temperature. The experimental results show that as the evaporation temperature increases, the system COPh and COP also increase;With the increase of chilled water flow, there is no obvious increase in COPh and COP of the system;As the temperature of chilled water increases, the COPh and COP increase significantly after the system increases the regenerator;The increase of the cooling water flow has a great influence on the system performance, the system heating and cooling capacities increase significantly;With the increase of the cooling water temperature, the heat exchange capacity of the system decreases, resulting in a decrease of the COPh and COP of the system. Through the above experiments, under the same working conditions, adding a regenerator can improve the performance of the system.