| 摘要: |
| 隧道地源热泵是目前解决地铁隧道热污染难题的有效技术之一。目前，该技术仍未形成系统的设计方法。毛细管换热器（CHE）因其抗腐蚀、易弯曲、换热性能好、节省空间等优点，被用作隧道地源热泵系统的前端换热器。本研究拟对隧道衬砌内CHE在间歇运行下的传热性能进行分析。首先基于示范工程建立了CHE流-热耦合传热模型，其次在TRNSYS平台中搭建了CHE仿真系统，最后对比分析了CHE在连续和间歇运行工况下的传热性能。结果表明，间歇运行能显著提高换热器的传热性能，并有助于缓解隧道围岩环境恶化的问题。研究可为隧道地源热泵技术的工程设计应用提供理论基础。 |
| 关键词: 可再生能源 热泵 毛细管 间歇运行 传热性能 |
| DOI： |
| 投稿时间：2022-12-08修订日期：2023-04-28 |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| Heat transfer performance of capillary heat exchangers in circular tunnel lining during intermittent operation |
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| Abstract: |
| Tunnel ground source heat pump is one of the effective technologies to solve the problem of subway tunnel thermal pollution. At present, this technology has not formed a systematic design method. The capillary heat exchanger (CHE) is used as the front-end heat exchanger of the tunnel ground source heat pump system because of its corrosion resistance, easy bending, good heat transfer performance and space saving. This study intends to analyze the heat transfer performance of CHE in tunnel lining under intermittent operation. Firstly, the CHE fluid-thermal coupling heat transfer model was established based on the demonstration project. Secondly, the CHE simulation model was built on the TRNSYS platform. Finally, the heat transfer performance of CHE under continuous and intermittent operating conditions was compared and analyzed. The results show that intermittent operation can significantly improve the heat transfer performance of the heat exchanger and help alleviate the deterioration of tunnel surrounding rock environment. The research can provide a theoretical basis for engineering design and application of tunnel ground source heat pump technology. |
| Key words: renewable energy heat pump capillary intermittent operation heat transfer performance |
