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首页> 外文会议>2010 the 5th IEEE Conference on Industrial Electronics and Applications >Experimental study of optimum heat rejection pressure for a CO2 heat pump water heater
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Experimental study of optimum heat rejection pressure for a CO2 heat pump water heater

机译：CO 2 热泵热水器最佳排热压力的实验研究

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摘要

As an environmentally friendly refrigerant, CO2 is seen as one of the best fluids for a heat pump water heater application system. To investigate the relationships between optimum heat rejection pressure and other related operating parameters, an experimental research has been conducted for a transcritical CO2 heat pump water heater with two throttling valves. It proved that it is relatively reliable to control the heat rejection pressure of the CO2 system with two throttling valves; there exists an optimal heat rejection pressure, under which the system can reach the maximum heating coefficient of performance. Meanwhile, the research also reveals that the optimal heat rejection pressure chiefly depends on the outlet refrigerant temperature of the gas cooler, and in the next place, the evaporating temperature; on the other hand, the superheat degree of CO2 at the inlet of the compressor was found to have little to do with the optimum heat rejection pressure.
机译：作为一种环保型制冷剂，CO 2 被视为热泵热水器应用系统中的最佳流体之一。为了研究最佳排热压力与其他相关运行参数之间的关系，对具有两个节流阀的跨临界CO 2 热泵热水器进行了实验研究。实践证明，用两个节流阀控制CO 2 系统的排热压力较为可靠。存在一个最佳的排热压力，在该压力下，系统可以达到最大的加热性能系数。同时，研究还表明，最佳排热压力主要取决于气体冷却器的出口制冷剂温度，其次取决于蒸发温度。另一方面，发现压缩机入口处的CO 2 的过热度与最佳排热压力无关。

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