跨临界CO_2循环制冷系统的实验研究

Experimental Study on the Performances of the Transcritical CO_2 Refrigeration System

本文通过搭建跨临界CO2循环制冷系统实验台,研究在冷却水出口温度为55℃的时候,系统的COP随高压侧压力的变化趋势。研究结果表明:在一定的蒸发温度下,随着高压侧压力的升高,系统的性能系数呈现出先升高后降低的趋势,且系统的COP存在一个最大值。因此,在某一蒸发温度下,存在一个最优高压侧压力使系统的性能系数达到最大值。

A transcritical CO2 refrigeration system is set up to study the trend of the COP with the high side pressure increasing under a certain evaporating temperature when the outlet temperature of the cooling water is 55 ℃.The results of the experiment show that the COP of the system increases at first and then decreases with the high side pressure increasing,and a maximum COP exists.Therefore,under a certain evaporating temperature,there exists an optimum high side pressure which leads to the best COP of the system.