Study on numerical modeling and operating characteristics of air source heat pump systems for low-temperature and high-humidity environments

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer Pub Date : 2025-10-16 DOI:10.1016/j.icheatmasstransfer.2025.109856

Fu Liang , Peng Liu , Pingding Li , Yuan Li , Kang Yang , Nianyan Jian

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Abstract

In this paper, a numerical model of an air source heat pump (ASHP) system for low-temperature and high-humidity environments was developed, considering the effects of atmospheric pressure, ambient air temperature (T_a), and relative humidity (φ) on the thermophysical properties of atmospheric air. The model was solved using the trial method and validated against measured data. The effects of T_a, φ, and temperature difference between supply and return water (DT) on the performance of the ASHP system were analyzed. The results show that the relative error (RE) between the measured and simulated values of heating capacity remains within ±10 %, and over 90 % of the RE values of power consumption are also within ±10 %. Under the same operating conditions or when φ exceeds 50 %, the power consumption increases as temperature decreases. When T_a exceeds 6 °C, an increase in φ leads to a decrease in the power consumption. The mean COP of the ASHP system increases with increasing DT, however, when DT exceeds 5.3 °C, the increase in mean COP is less than 0.1 %. This paper can provide a theoretical basis for exploring the operating characteristics of the ASHP system in low-temperature and high-humidity environments.

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低温高湿环境下空气源热泵系统数值模拟及运行特性研究

本文建立了低温高湿环境下空气源热泵（ASHP）系统的数值模型，考虑了大气压力、环境空气温度（Ta）和相对湿度（φ）对大气热物性的影响。用试验方法求解了模型，并对实测数据进行了验证。分析了Ta、φ、供回水温差（DT）对系统性能的影响。结果表明，热容量的实测值与模拟值的相对误差（RE）保持在±10%以内，超过90%的电耗RE值也在±10%以内。在相同工作条件下或φ大于50%时，功耗随温度的降低而增加。当Ta大于6℃时，φ增大，功耗降低。空气源热泵系统的平均COP随DT的增加而增加，但当DT超过5.3°C时，平均COP的增加小于0.1%。本文可为研究低温高湿环境下空气源热泵系统的运行特性提供理论依据。

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

International Communications in Heat and Mass Transfer 工程技术-力学

CiteScore

11.00

自引率

10.00%

发文量

648

审稿时长

32 days

期刊介绍： International Communications in Heat and Mass Transfer serves as a world forum for the rapid dissemination of new ideas, new measurement techniques, preliminary findings of ongoing investigations, discussions, and criticisms in the field of heat and mass transfer. Two types of manuscript will be considered for publication: communications (short reports of new work or discussions of work which has already been published) and summaries (abstracts of reports, theses or manuscripts which are too long for publication in full). Together with its companion publication, International Journal of Heat and Mass Transfer, with which it shares the same Board of Editors, this journal is read by research workers and engineers throughout the world.