寒区路基地源热泵型供热装置运行特性及能效优化  

Study on operation characteristics and energy efficiency optimization of ground-source heat pump heating device for embankment in cold regions

作　　者：胡田飞 张峻洋 郭磊 孙天泽 Hu Tianfei;Zhang Junyang;Guo Lei;Sun Tianze(State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Suzhou Metro Line 1 Co.,Ltd.,Suzhou 215000,China;School of Science,Changchun University of Science and Technology,Changchun 130022,China)

机构地区：[1]石家庄铁道大学省部共建交通工程结构力学行为与系统安全国家重点实验室,河北石家庄050043 [2]苏州轨道交通市域一号线有限公司,江苏苏州215000 [3]长春理工大学理学院,吉林长春130022

出　　处：《可再生能源》2022年第10期1325-1333,共9页Renewable Energy Resources

基　　金：国家自然科学基金(No.42001059);中央引导地方科技发展资金项目(226Z5402G);河北省自然科学基金(No.E2020210044);河北省高等学校科学技术研究项目(No.QN2020180)。

摘　　要：文章针对寒区路基工程广泛面临的冻害问题,基于地源热泵技术,构建一种主动温控式路基。通过模型试验,对比了热泵在不同运行模式下的换热特性,结果表明:在连续运行模式下,热泵供热温度最高达95.9℃,吸热温度低至-8.5℃,可以有效防治冻胀。热泵定时运行模式的换热效率优于定温模式,定温模式的启停循环次数多、压缩机能耗大;在定时模式下,随着启停比的增大,供热温度逐渐升高,而吸热温度先降低、后升高,启停比为2∶1时,换热效果最优;面向单线铁路路基冻胀抢险时,建议热泵间距取1.5~3.0 m,热泵功率宜取1.0~2.0 kW,根据冻胀程度动态地控制启停比例。In order to improve the frost heave problem of railway and highway subgrade in cold regions,an active temperature-control type subgrade was proposed combined with ground source heat pump.The heat transfer characteristics of heat pump under different operation modes were compared through model tests.The results show that the heating temperature can reach 95.9℃and the minimum heat-absorbing temperature is-8.5℃,which can effectively prevent subgrade frost heaving.The heat exchange efficiency of the fixed-time intermittent operation mode is better than that of the constant-temperature operation mode.There are too many start-stop cycles in constanttemperature operation mode,which is not conducive to the energy consumption.With the increase of the start-stop ratio,the heating temperature increases gradually,while the heat-absorbing temperature first decreases and then increases,and the heat transfer effect is best at a start-stop ratio of 2∶1.When dealing with subgrade frost heaving of single-track railway,it was suggested that the heat pump spacing valued 1.5~3.0 m,the heating capacity valued 1.0~2.0 kW.The startstop time ratio of heat pump should be controlled dynamically according to frost heaving degree.

关 键 词：路基冻胀 地源热泵 启停比 热作用半径 制热系数 

分 类 号：TK523[动力工程及工程热物理—热能工程] TU442[建筑科学—岩土工程]