含相变材料的充填体内置采热管群热压性能研究
Thermal and pressure performance of heat collection tube group in backfill body added with phase change material
张小艳 1杜强强 2刘浪 3许慕妍 4柯亚萍 1王雪丽1
作者信息
- 1. Energy School,Xi'an University of Science and Technology,Xi'an 710054,China
- 2. School of Architecture and Civil Engineering,Xi'an University of Science and Technology,Xi'an 710054,China
- 3. Energy School,Xi'an University of Science and Technology,Xi'an 710054,China;Key Laboratory of Western Mines and Hazards Prevention,Ministry of Education,Xi'an 710054,China
- 4. Shenzhen iTeaQ Network Power Technology Co.,Ltd.,Shenzhen 518110,China
- 折叠
摘要
通过将采热管群与充填采矿技术相结合可提取矿井中的地热能,有效缓解高地热带来的热害问题.本文以采热管群为研究对象,分析了充填体放热过程中传热流体的温度、速度和压力分布,讨论了雷诺数、管径、管间距和管排方式对采热管群性能的影响.结果表明:当雷诺数从100增加到5000时,换热量从2.24×103 kJ增加到16.78×103 kJ,综合评价因子从0.087增加到1.31.当管径从4 mm增加到 6 mm时,换热量从15.07×103 kJ增加到17.11×103 kJ,综合评价因子从1.157增加到1.388.当管间距从130 mm增加到170 mm时,换热量从14.24×103 kJ增加到16.25×103 kJ,综合评价因子从1.013增加到1.263.此外,四路并联布置可以保证较高的换热量和较低的压降,从而获得较高的综合评价因子.该研究为充填体中采热管群的设计和优化提供了理论参考.
Abstract
Combined with the backfill mining,the heat collection tube group(HCTG)in the backfill body can extract geothermal energy,which can effectively alleviate heat damage caused by high ground temperature.This paper takes the HCTG as research object,the temperature,velocity and pressure distribution of the heat transfer fluid(HTF)during the heat release process of the backfill body were analyzed,and the influences of Re,tube diameter,tube spacing and tube arrangement on the performance of the HCTG were discussed.The results show that the heat transfer capacity increases from 2.24×103 kJ to 16.78×103 kJ and the comprehensive evaluation factor increases from 0.087 to 1.31 for Re from 100 to 5000.The heat transfer capacity increases from 15.07×103 kJ to 17.11×103 kJ and the comprehensive evaluation factor increases from 1.157 to 1.388 for tube diameter from 4 mm to 6 mm.The heat transfer capacity increases from 14.24×103 kJ to 16.25×103 kJ and the comprehensive evaluation factor increases from 1.013 to 1.263 for tube spacing from 130 mm to 170 mm.In addition,the four-way parallel arrangement can ensure higher heat transfer capacity and lower pressure drop,and obtain a higher comprehensive evaluation factor.The research provides a theoretical reference for the design and optimization of HCTG in the backfill body.
关键词
采热管群/充填体/换热/压降/综合性能Key words
heat collection tube group/backfill body/heat transfer/pressure drop/comprehensive performance引用本文复制引用
基金项目
国家自然科学基金(51974225)
国家自然科学基金(52274063)
国家自然科学基金(52304154)
国家自然科学基金(52104148)
Natural Science Basic Research Program of Shaanxi Province of China(2022JQ-401)
Scientific Research Project of Youth Innovation Team Construction of Shaanxi Provincial Department of Education(21JP077)
出版年
2024
NETL
NSTL
万方数据