用于深层地热井的新型井下热交换器的设计和性能分析:实验和现场测试

IF 9 1区 工程技术 Q1 ENERGY & FUELS Renewable Energy Pub Date : 2024-11-05 DOI:10.1016/j.renene.2024.121779
Dongxi Liu , Di Gu , Wei Zhang , Shuntao Hu , Maoqin Hu , Tianyi Sun , Chuanshan Dai
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引用次数: 0

摘要

本研究解决了地热能源系统中 "抽热不抽水 "的难题,这是可持续资源利用的关键要求。为提高紧凑型地热单井系统的热交换效率,设计了一种新型井下热交换器(NDHE)。这项研究采用了理论分析、实验研究和现场测试。该热交换器采用了地热水单通流和地面循环水双通流,在实验室条件下,热传导系数达到 2200-3200 W/(m2-K),最大热提取功率为 32 kW。在实地应用中,该系统的汲取热量功率为 185 kW,比现有技术高出 38-58%,足以满足建筑物 155 kW 的供热需求。在满负荷情况下,预计最大功率可达 555 千瓦,是目前单井系统性能的四倍多。这种创新的热交换器大大提高了热提取效率和可扩展性,为地热能源技术的广泛应用铺平了道路。
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Design and performance analysis of a novel downhole heat exchanger for deep geothermal wells: Experimental and field tests
This study addresses the challenge of "extracting heat without extracting water" in geothermal energy systems, which is a key requirement for sustainable resource utilization. A novel downhole heat exchanger (NDHE) was designed to increase the heat exchange efficiency in compact geothermal single-well systems. This research employed theoretical analysis, experimental studies, and field tests. The heat exchanger, which incorporates a single-pass flow for geothermal water and a dual-pass flow for ground loop water, achieved a heat transfer coefficient of 2200–3200 W/(m2·K) and a maximum heat extraction power of 32 kW under laboratory conditions. In field applications, the system demonstrated a heat extraction power of 185 kW—38–58 % higher than that of existing technologies—sufficient to meet the 155 kW heating demand for buildings. Under full load, the predicted maximum capacity reached 555 kW, more than quadrupling the performance of current single-well systems. This innovative heat exchanger significantly enhances both heat extraction efficiency and scalability, paving the way for broader adoption of geothermal energy technologies.
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来源期刊
Renewable Energy
Renewable Energy 工程技术-能源与燃料
CiteScore
18.40
自引率
9.20%
发文量
1955
审稿时长
6.6 months
期刊介绍: Renewable Energy journal is dedicated to advancing knowledge and disseminating insights on various topics and technologies within renewable energy systems and components. Our mission is to support researchers, engineers, economists, manufacturers, NGOs, associations, and societies in staying updated on new developments in their respective fields and applying alternative energy solutions to current practices. As an international, multidisciplinary journal in renewable energy engineering and research, we strive to be a premier peer-reviewed platform and a trusted source of original research and reviews in the field of renewable energy. Join us in our endeavor to drive innovation and progress in sustainable energy solutions.
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