跨临界二氧化碳热泵喷射循环实验
发布时间：2018-09-13 11:13
【摘要】：在跨临界CO_2热泵热水器系统中引入优化设计的喷射器,对系统进行实验研究,分析了制热系数、引射比、升压比、喷射器效率等参数随热水体积流量和出口温度及高压侧压力的变化趋势以及优化设计的喷射器对系统的影响。实验结果表明:随着热水体积流量减小或其出口温度增加,引射比将逐渐减小,而喷射器效率逐渐升高;在测试工况范围内升压比基本保持不变,系统COPh最高将近3.5;系统高压侧的压力因优化喷射器的引入而明显降低,有利于系统的安全运行;跨临界二氧化碳热泵喷射循环系统存在一个最优运行压力,值得注意的是在最优运行压力下,热水出水温度虽未达到最高,但依旧超过55℃。系统稳定运行在最优高压侧压力下,不仅系统性能大幅度提高,而且保证了热水的出水温度。
[Abstract]:An optimized ejector was introduced into the transcritical CO_2 heat pump water heater system. The system was experimentally studied. The heating coefficient, ejection ratio and booster ratio were analyzed. The variation trend of ejector efficiency with the volume flow of hot water, outlet temperature and high pressure lateral pressure, and the influence of optimized ejector on the system. The experimental results show that with the decrease of the volume flow rate of hot water or the increase of outlet temperature, the ejection ratio will gradually decrease, while the ejector efficiency will gradually increase, and the booster ratio will remain basically unchanged in the range of test conditions. The maximum COPh of the system is about 3.5; the pressure on the high pressure side of the system is obviously reduced because of the introduction of the optimized ejector, which is beneficial to the safe operation of the system; there is an optimal operating pressure in the trans-critical carbon dioxide heat pump injection cycle system. It is worth noting that under the optimal operating pressure, the effluent temperature of hot water does not reach the highest, but still exceeds 55 鈩，
本文编号：2241008
[Abstract]:An optimized ejector was introduced into the transcritical CO_2 heat pump water heater system. The system was experimentally studied. The heating coefficient, ejection ratio and booster ratio were analyzed. The variation trend of ejector efficiency with the volume flow of hot water, outlet temperature and high pressure lateral pressure, and the influence of optimized ejector on the system. The experimental results show that with the decrease of the volume flow rate of hot water or the increase of outlet temperature, the ejection ratio will gradually decrease, while the ejector efficiency will gradually increase, and the booster ratio will remain basically unchanged in the range of test conditions. The maximum COPh of the system is about 3.5; the pressure on the high pressure side of the system is obviously reduced because of the introduction of the optimized ejector, which is beneficial to the safe operation of the system; there is an optimal operating pressure in the trans-critical carbon dioxide heat pump injection cycle system. It is worth noting that under the optimal operating pressure, the effluent temperature of hot water does not reach the highest, but still exceeds 55 鈩，
本文编号：2241008
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