Design and experimental study of a novel solid desiccant heat pump system based on dual cooling sources

IF 10.9 1区工程技术 Q1 ENERGY & FUELS

Energy Conversion and Management Pub Date : 2025-09-16 DOI:10.1016/j.enconman.2025.120523

Lurong Ge, Xinyu Zhou, Yaohui Feng, Tianshu Ge

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引用次数: 0

Abstract

Air conditioning systems play an irreplaceable role in human thermal comfort, but also account for a large portion of building energy consumption in modern society. Solid desiccant heat pump (SDHP) systems based on desiccant-coated heat exchangers (DCHEs) have significantly improved the coefficient of performance (COP) of the traditional vapor compression cycle by increasing the evaporation temperature and recovering condensation heat to drive the dehumidification. However, the frequent reversal of the refrigerant causes extra energy consumption and brings instability to the system. Herein, a novel SDHP system based on dual cooling sources (DCS-SDHP) is proposed and experimentally investigated, which decouples the dehumidification and cooling and introduces a natural cooling source to the adsorption process. The dynamic characteristics revealed that the DCS-SDHP system can improve the stability of the supply air temperature/humidity ratio and reduce the heat losses during switchovers while maintaining high system performance. Influential mechanisms of key parameters such as switching time, compressor frequency, and cooling water temperature are studied. Under typical ARI humid conditions with optimized parameters, the DCS-SDHP system achieves a COP of 6.2, demonstrating a 26.5% improvement compared with the conventional SDHP system. This research validates the feasibility and applicability of the proposed system, offering new avenues for efficient dehumidification and cooling.

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基于双冷源的新型固体干燥剂热泵系统的设计与实验研究

空调系统在人体热舒适方面发挥着不可替代的作用，在现代社会的建筑能耗中也占有很大的比重。基于干燥剂包覆换热器（DCHEs）的固体干燥剂热泵（SDHP）系统通过提高蒸发温度和回收冷凝热来驱动除湿，显著提高了传统蒸汽压缩循环的性能系数（COP）。但是，频繁的制冷剂反转会造成额外的能量消耗，给系统带来不稳定性。本文提出了一种基于双冷却源的新型SDHP系统（DCS-SDHP），并对其进行了实验研究，该系统将除湿和冷却分离，并在吸附过程中引入自然冷却源。动态特性分析表明，DCS-SDHP系统在保持较高系统性能的同时，提高了送风温湿度比的稳定性，减少了换热损失。研究了开关时间、压缩机频率、冷却水温度等关键参数的影响机理。在典型ARI湿度条件下，优化参数后，DCS-SDHP系统的COP值为6.2，比传统SDHP系统提高了26.5%。本研究验证了所提出系统的可行性和适用性，为高效除湿和冷却提供了新的途径。

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 Conversion and Management 工程技术-力学

CiteScore

19.00

自引率

11.50%

发文量

1304

审稿时长

17 days

期刊介绍： The journal Energy Conversion and Management provides a forum for publishing original contributions and comprehensive technical review articles of interdisciplinary and original research on all important energy topics. The topics considered include energy generation, utilization, conversion, storage, transmission, conservation, management and sustainability. These topics typically involve various types of energy such as mechanical, thermal, nuclear, chemical, electromagnetic, magnetic and electric. These energy types cover all known energy resources, including renewable resources (e.g., solar, bio, hydro, wind, geothermal and ocean energy), fossil fuels and nuclear resources.