A novel comprehensive frosting characteristic index jointly considering the refrigerant and configuration of air source heat pumps

IF 7.1 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Energy and Buildings Pub Date : 2025-10-08 DOI:10.1016/j.enbuild.2025.116558

Shiquan Wang , Wenzhe Wei , Jianfei Luo , Wei Wang , Yuying Sun , Zhaoyang Li , Wanpeng Zhu , Shiming Deng

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引用次数: 0

Abstract

The refrigerant and configurations represent pivotal elements in the development process of the air source heat pumps (ASHPs), exerting a considerable influence on the formation of frosting. Nevertheless, the refrigerant influence mechanism on the frosting performance remains unclear. To comprehensively quantify the frosting performance for different refrigerants, a detailed theoretical analysis of ASHPs was conducted on the outdoor exchanger heat transfer process. The essential physical parameters of the refrigerant and the configuration that affects the frosting performance of ASHPs were determined. Then, a novel frosting characteristic index (CICOR) was proposed, considering the joint influence of these physical parameters. Moreover, the frosting experiments were conducted using four experimental ASHPs, and the empirical numerical relationships among CICOR, frosting driving force and frosting duration were established. The results indicate that an elevated CICOR value is associated with enhanced frosting suppression capability. The frosting duration can be predicted by calculating the CICOR. With an increase in the CICOR value from 11.26 × 10⁻² to 52.68 × 10⁻² (s·m⁵)/kJ², the frosting duration increased from 21 min to 122 min for ASHPs utilizing R410A. Meanwhile, when the value of CICOR increased from 14.46 × 10⁻² to 54.82 × 10⁻² (s·m⁵)/kJ², the frosting duration increased from 23 min to 69 min for ASHPs using R32.

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一种综合考虑冷媒和空气源热泵配置的结霜特性指标

制冷剂和配置是空气源热泵发展过程中的关键因素，对结霜的形成有相当大的影响。然而，制冷剂对结霜性能的影响机制尚不清楚。为了全面量化不同制冷剂的结霜性能，对室外换热器的传热过程进行了详细的理论分析。确定了冷媒的基本物理参数和影响空气源热泵结霜性能的配置。然后，考虑这些物理参数的共同影响，提出了一种新的结霜特征指数（CICOR）。利用4种实验空气源热泵进行了结霜试验，建立了CICOR、结霜驱动力和结霜持续时间之间的经验数值关系。结果表明，CICOR值的升高与抑制结霜能力的增强有关。通过计算CICOR可以预测结霜时间。当CICOR值从11.26 × 10−2增加到52.68 × 10−2 (s·m5)/kJ2时，使用R410A的空气源热泵结霜时间从21 min增加到122 min。同时，当CICOR值从14.46 × 10−2增加到54.82 × 10−2 (s·m5)/kJ2时，使用R32的空气源热泵结霜时间从23 min增加到69 min。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Energy and Buildings 工程技术-工程：土木

CiteScore

12.70

自引率

11.90%

发文量

863

审稿时长

38 days

期刊介绍： An international journal devoted to investigations of energy use and efficiency in buildings Energy and Buildings is an international journal publishing articles with explicit links to energy use in buildings. The aim is to present new research results, and new proven practice aimed at reducing the energy needs of a building and improving indoor environment quality.