Experimental Research of the Effect of Inlet Structure on the Discharge Performance of Heat Pump Water Heater

Qin Luwen; Du Minghao; Shen LiDi; Li Shuhong

doi:10.3969/j.issn.0253-4339.2022.03.115

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Experimental Research of the Effect of Inlet Structure on the Discharge Performance of Heat Pump Water Heater

更新时间：2024-07-18

- Experimental Research of the Effect of Inlet Structure on the Discharge Performance of Heat Pump Water Heater
- Journal of Refrigeration Vol. 43, Issue 3, (2022)
- 作者机构：
  
  东南大学能源与环境学院
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0253-4339.2022.03.115
  CLC：
- Published：2022
- 稿件说明：
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Qin Luwen, Du Minghao, Shen LiDi, et al. Experimental Research of the Effect of Inlet Structure on the Discharge Performance of Heat Pump Water Heater[J]. Journal of refrigeration, 2022, 43(3).
DOI：

Qin Luwen, Du Minghao, Shen LiDi, et al. Experimental Research of the Effect of Inlet Structure on the Discharge Performance of Heat Pump Water Heater[J]. Journal of refrigeration, 2022, 43(3). DOI： 10.3969/j.issn.0253-4339.2022.03.115.

摘要

为提高空气源热泵热水器释能过程热水输出率与能效比，本文设计了一种弧形挡板型进口结构，搭建了热泵热水器实验台，以热水输出率和系统COP为评价指标，对比实验了含新型挡板进口结构的热泵热水器与直接型和侧进型进口结构热泵热水器的性能，获得弧形挡板进口对热泵热水器释能过程运行性能的影响特性。结果表明：弧形挡板型进口结构能显著改善水箱沿高度方向的热分层现象；当进口流量在5~10 L/min之间变化时，弧形挡板型进口结构比直接型进口结构热水输出率提升52.87%~96.60%，系统COP提升7.14%~7.40%；比侧进型进口结构热水输出率提升38.37%~76.99%，系统COP提升3.22%~5.53%。随着进口流量的增加，性能提升越显著。弧形挡板型进口结构在给定的三种进口流量下始终优于另外两种进口结构，可实现热水输出率和系统COP双高效的运行效果。

Abstract

A curved baffle-type inlet structure was designed for a water storage tank to improve the performance of an air-source heat pump water heater system. A heat pump water heater test bench was set up to compare the extraction efficiency and COP of the curved baffle inlet structure to the direct-entrance and side-entrance inlet structures. The experimental results showed that the thermal stratification of water along the height direction was effectively released by the curved baffle-type inlet structure. Compared to the direct-entrance inlet structure water heater

the extraction efficiency increased from 52.87% to 96.60% with a curved baffle-type inlet heat pump water heater when the inlet flow rate ranged from 5 L/min to 10 L/min

and the COP improved from 7.14% to 7.40%. Contrary to the side-entrance inlet structure water heater

the extraction efficiency increased from 38.37% to 76.99% with a curved baffle-type inlet heat pump water heater when the inlet flow rate ranged from 5 to 10 L/min

and the COP improved from 3.22% to 5.53%. The performance improvement increased as the inlet flow rate increased. The curved baffle-type inlet structure of the heat pump water heater simultaneously increased the extraction efficiency and the system’s COP.

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