| 摘要: |
| 本文以R417A为工质，在冷凝器不同进水温度、不同进水体积流量时，测试了空气源热泵热水器的运行性能及螺旋套管冷凝器的换热特性，为制冷空调及热泵系统的工质替代提供参考。实验工况为：冷凝器入口水温20~55 ℃，冷凝器进水体积流量为0.6~1.0 m3/h，环境温度分别为15、29 ℃。结果表明：冷凝器进水体积流量一定时，随入口水温的升高，冷凝器总换热量、总传热系数减小，压缩机排气压力、输入功率增大，热泵热水器制热量、制热性能系数COP下降。冷凝器入口水温一定时，随进水体积流量的增加，冷凝器总换热量、总传热系数增大，压缩机排气压力、输入功率减小，热泵热水器制热量、COP增大。实验工况范围内，与环境温度为15 ℃相比，环境温度为29 ℃时的冷凝器总换热量、总传热系数、排气压力、吸气压力、输入功率、制热量、COP均较高。 |
| 关键词: 热泵热水器 螺旋套管冷凝器 换热特性 |
| DOI： |
| 投稿时间：2017-08-08
|
| 基金项目:国家自然科学基金(51504188)资助项目。 |
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| Study on Performance of R417A Heat Pump Water Heater and Heat Transfer of Spiral Tube Condenser |
|
Zhang Xiaoyan, Xia Xiang
|
| (School of Engineering, Xi'an University of Science and Technology) |
| Abstract: |
| In the study, the operation performance of air source heat pump water heater and heat transfer performance of spiral casing condenser were examined by using R417A as a refrigerant. The experimental conditions are as follows: inlet water temperature of the condenser is 20–55 ℃, influent flow rate of the condenser is 0.6–1.0 m3/h, and environmental temperatures are 15 ℃ and 29 ℃. The experimental results indicate that when the water flow is constant, increases in the entrance temperature result in the decrease in the total heat transfer rate and total heat transfer coefficient of performance (COP), the increase in the discharge pressure and input power of the compressor, and the decrease in the heating capacity and heating coefficient of the heat pump water heater. When the condenser entrance water temperature is constant, with increases in the water flow, the total heat transfer rate and the total heat transfer coefficient are increased, discharge pressure and the input power of the compressor are reduced, and heating capacity and heating COP of the heat pump water heater are increased. When the ambient temperature is 29 ℃, total heat transfer, total heat transfer coefficient, exhaust pressure, suction pressure, input power, heating capacity, and heating COP of the condenser exceed those when the ambient temperature is 15 ℃. |
| Key words: heat pump water heater spiral tube condenser heat transfer performance |
