流体机械

2017, v.45;No.542(08) 48-52+47

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环境温度对空气源热泵热水器系统性能的影响
The Effect of Ambient Temperature on the Performance of Air-source Heat Pump Water Heater System

袁朝阳;陶乐仁;虞中旸;黄理浩;
YUAN Zhao-yang;TAO Le-ren;YU Zhong-yang;HUANG Li-hao;University of Shanghai for Science and Technology;

摘要(Abstract):

工况的变化对空气源热泵系统的优化提出了更高要求,环境温度作为重要影响参数,需要通过大量试验找寻其对空气源热泵热水器的影响规律,从而做出相应的控制策略。本文模拟不同环境温度对空气源热泵热水器进行试验,结果表明:(1)随环境温度的降低过热度逐渐减小,系统的制热量受过热度影响,过热度越低制热量越大,当过热度为0℃时制热量开始逐渐下降;(2)环境温度越低,系统的压比越大、排气温度越高、过热度越小,压缩机更易湿压缩加剧耗功的增长,但能有效降低排气温度;(3)随着环境温度的降低,系统的平均能效比COPa是逐渐减小的,环境温度越低系统整体制热效果越差,加热运行的时间越长。
The change of working condition puts forward higher requirements to the optimization of air source heat pump system, and the ambient temperature as an important influence parameter need a large number of experiments to find its influence rule to the air source heat pump water heater to make the corresponding control strategy. In this paper, air-source heat pump water heater experiment is carried out in different simulated ambient temperature. It could be concluded by analyzed the result that the superheat temperature decreases with the decreasing of ambient temperature, the heating capacity of the system is related to the superheat degree. The lower the superheat temperature is, the larger the heating capacity is. The heating capacity begins to drop when the superheat temperature is 0℃. Moreover, as the ambient temperature decreases, the pressure ratio of the system increases, the exhaust gas temperature rises and the superheat temperature decrease. Compressor suction liquid entrainment will increase the power consumption, but it can effectively reduce the exhaust temperature. Furthermore, the average COP of COPa is decreased with the decrease of ambient temperature. In sum, the lower the temperature is, the worse the heating effect is, and the longer the heating time is.

关键词(KeyWords): 空气源;环境温度;过热度;系统性能;试验研究
air source;ambient temperature;superheat temperature;system performance;experimental study

Abstract:

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基金项目(Foundation): 上海市动力工程多相流动与传热重点实验室项目(13DZ2260900);; 博士启动经费项目(1D-16-301-007)

作者(Author): 袁朝阳;陶乐仁;虞中旸;黄理浩;
YUAN Zhao-yang;TAO Le-ren;YU Zhong-yang;HUANG Li-hao;University of Shanghai for Science and Technology;

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