Numerical simulation and experimental study of medium and deep ground source heat pump system in a cold and arid region

IF 6.4 2区工程技术 Q1 THERMODYNAMICS Case Studies in Thermal Engineering Pub Date : 2024-11-14 DOI:10.1016/j.csite.2024.105473

Hongwei Feng, Hui Xu, Hongtu Feng, Ying Gao

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Abstract

Although medium and deep ground source heat pump system are more advantageous for heating compared to other heat pump systems in winter, there has been limited researches on medium and deep ground source heat pump system in a cold and arid region. In order to study the heating performance of the system and address heating issues in a cold and arid region, the experimental tests were conducted from November 1, 2021, to March 31, 2022, and the results showed that the heating system operates stably, maintaining indoor heating above 18 °C throughout the day. The average coefficient of performance (COP) is 5.67, and the cumulative power consumption is 185971 kWh. Additionally, this study established a new three-dimensional numerical model of a medium and deep borehole heat exchanger (MDBHE) and validated it with experimental test results. The numerical simulation analyzed the impact of different insulation layers, well diameters, flow rate and well depths on the heat pump performance and heating effectiveness. This experimental research and numerical simulation are significant to promote the development of low-carbon as soon as possible.

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寒冷干旱地区中深层地源热泵系统的数值模拟和实验研究

虽然与其他热泵系统相比，中深层地源热泵系统在冬季供暖方面更具优势，但在寒冷干旱地区对中深层地源热泵系统的研究还很有限。为了研究该系统的供暖性能，解决寒冷干旱地区的供暖问题，2021 年 11 月 1 日至 2022 年 3 月 31 日进行了实验测试，结果表明供暖系统运行稳定，全天室内供暖温度保持在 18 ℃ 以上。平均性能系数（COP）为 5.67，累计耗电量为 185971 kWh。此外，本研究还建立了一个新的中深孔热交换器（MDBHE）三维数值模型，并通过实验测试结果进行了验证。数值模拟分析了不同隔热层、井径、流量和井深对热泵性能和加热效果的影响。这项实验研究和数值模拟对尽快推动低碳发展具有重要意义。

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来源期刊

Case Studies in Thermal Engineering Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

8.60

自引率

11.80%

发文量

812

审稿时长

76 days

期刊介绍： Case Studies in Thermal Engineering provides a forum for the rapid publication of short, structured Case Studies in Thermal Engineering and related Short Communications. It provides an essential compendium of case studies for researchers and practitioners in the field of thermal engineering and others who are interested in aspects of thermal engineering cases that could affect other engineering processes. The journal not only publishes new and novel case studies, but also provides a forum for the publication of high quality descriptions of classic thermal engineering problems. The scope of the journal includes case studies of thermal engineering problems in components, devices and systems using existing experimental and numerical techniques in the areas of mechanical, aerospace, chemical, medical, thermal management for electronics, heat exchangers, regeneration, solar thermal energy, thermal storage, building energy conservation, and power generation. Case studies of thermal problems in other areas will also be considered.