Theoretical and Experimental Study on Drying Performance and Prediction Model of Heat Pump Clothes Dryer

Cao Zheng; Gao Keke; Xue Weichao

doi:10.12465/j.issn.0253-4339.2025.02.155

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Theoretical and Experimental Study on Drying Performance and Prediction Model of Heat Pump Clothes Dryer

更新时间：2025-04-15

- Theoretical and Experimental Study on Drying Performance and Prediction Model of Heat Pump Clothes Dryer
- Journal of Refrigeration Vol. 46, Issue 2, Pages: 155-161(2025)
- 作者机构：
  
  美的集团中央研究院　佛山　 528311
- 作者简介：
  
  Gao Keke, male, Ph. D., Midea Corporate Research Center, 86-15091151673, E-mail: gaokk@midea.com. Research fields: low carbon and high energy efficiency heat pump system, high power density rotating machinery, low noise design.
- 基金信息：
- DOI：10.12465/j.issn.0253-4339.2025.02.155
  CLC： TB651;TQ051.5
- Received：13 September 2023，
  
  Revised：09 November 2023，
  
  Accepted：2024-01-29，
  
  Published：16 April 2025
- 稿件说明：
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Cao Zheng, Gao Keke, Xue Weichao. Theoretical and Experimental Study on Drying Performance and Prediction Model of Heat Pump Clothes Dryer[J]. Journal of refrigeration, 2025, 46(2): 155-161.
DOI：

Cao Zheng, Gao Keke, Xue Weichao. Theoretical and Experimental Study on Drying Performance and Prediction Model of Heat Pump Clothes Dryer[J]. Journal of refrigeration, 2025, 46(2): 155-161. DOI： 10.12465/j.issn.0253-4339.2025.02.155.

摘要

热泵干衣机烘干过程具有强耦合、时变性、集成性等复杂特性，为理论分析热泵干衣机系统参数对烘干性能的影响研究带来了很大难度。基于一定简化，分析了不同压缩机能力，不同风机风量对热泵干衣机单位能耗除湿量SMER、单位时间除湿量MER的影响。研究发现：对于闭式热泵干衣机，在同一风量下，冷凝器出风温度在20~80 ℃，蒸发器出风温度在10~50 ℃，干衣机SMER随着冷凝器出风和蒸发器出风温度的升高均先增大再减小。对于半载5 kg衣服负载的热泵干衣机，理论计算其存在最优的冷凝器出风温度为53 ℃、蒸发器出风温度为27 ℃，使干衣机SMER最大。其最优的冷凝器出风温度和蒸发器出风温度与热泵系统COP及滚筒内衣物的传热传质有关；在同一蒸发器出风、冷凝器出风温度下，系统风量在0.02~0.08 kg/s，SMER随着风量的增大先增大再减小，存在最优的工作风量0.047 kg/s使干衣机SMER最大。其最优风量与滚筒功率及整机风阻特性有关；并根据干衣机性能测试标准，通过实验验证了理论分析结果与实验测试基本一致，最大SMER对应的风量与工况温度也与理论分析接近。

Abstract

The drying process of a heat pump clothes dryer (HPCD) has complex characteristics such as strong coupling (the thermal cycle of the refrigerant side is coupled with the drying cycle of the air side)

time variation (the system operating parameters change with drying time)

and integration (limited space integrating evaporator

condenser

fan

compressor

etc.)

and such complexity makes theoretical analysis of the drying performance of HPCD difficult. Based on certain simplifications

this study analyzes the effects of different compressor capacities and fan airflows on the moisture extraction rate per unit time (MER) and moisture extraction rate per unit energy consumption (SMER) of the HPCD. Under the same airflow

the SMER increases first and then decreases with the condenser discharge air temperature and evaporator discharge air temperature

when the discharge air temperature of the condenser is between 20 ℃ to 80 ℃ and the discharge air temperature of the evaporator is between 10 ℃ to 50 ℃. For the HPCD analyzed in this paper

when drying a half load (5 kg) of clothes

theoretical calculations identified an optimal condenser discharge air temperature of 53 ℃ and an evaporator discharge air temperature of 27 ℃ that maximized the SMER. The optimal temperatures are related to the COP of the heat pump system and the mass and heat transfer capacity of air with clothes. Under the same evaporator discharge and condenser discharge temperatures

within the airflow range of 0.02~0.08 kg/s

the SMER first increases and then decreases with the airflow. There is an optimal working airflow of 0.047 kg/s that maximizes the SMER

which is related to the drum power and the airflow resistance characteristic of the clothes dryer. According to methods for measuring the performance of tumble dryers for household use

testing verified that the theoretical analysis results were consistent with experimental tests. This research method and its conclusions provide theoretical guidance for the design and optimization of HPCD.

关键词

Keywords

references

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