热网回水补热的多热源供暖系统分析  

Analysis of multi-source heating system withheat network backwater supplementation

作　　者：王顺 刘寅[1] 董岁具 孟照峰 闫俊海 张帆 吴飞骏 WANG Shun;LIU Yin;DONG Suiju;MENG Zhaofeng;YAN Junhai;ZHANG Fan;WU Feijun(School of Energy and Environmental,Zhongyuan University of Technology,Zhengzhou 450007,China;Zhengzhou Heating Group Co.Ltd.,Zhengzhou 450052,China)

机构地区：[1]中原工学院能源与环境学院,河南郑州450007 [2]郑州市热力总公司,河南郑州450052

出　　处：《区域供热》2023年第3期85-93,共9页District Heating

基　　金：住房和城乡建设部科学技术计划项目(2020-K-031);河南省重大科技专项(221100320100);河南省土木建筑学会科技指导计划项目(202120)。

摘　　要：为缓解市政热网压力、解决地源热泵土壤热失衡问题,设计了一套热网回水补热的太阳能-地源热泵复合供暖系统。对太阳能并联及串联地源热泵系统与该系统的土壤温度、蒸发器入口温度、太阳能热利用率、运行性能进行分析。结果表明:该系统土壤温度仅降低0.55℃,有效缓解了土壤热失衡问题;对比并联系统,蒸发器入口温度提高4℃,机组COP提升5%,太阳能全年热利用率提升24%;对比串联系统,功耗降低322 kW·h,制热量提高5025 kW·h,系统COP提高2%。热网回水补热系统地埋管数按照机组取热量的50%设计,更适用于地埋管钻孔面积受限的地区。当热网回水计量热价按照居民供热0.217元/kW·h收费时,相较于市政热网供暖方式,热网回水补热的多热源供暖系统的费用年值降低5500元。随着热网回水计量价格的降低,热网回水补热的多热源供暖系统的经济性将更具优势。In order to relieve the pressure of municipal heat network and solve the soil heat imbalance problem of ground source heat pump,a solar-ground source heat pump composite heating system with heat network backwater supplementation is bulit.The soil temperature,evaporator inlet temperature,solar heat utilization rate,and operational performance of the solar parallel,series ground source heat pump systems and this system are analyzed.The results show that:the soil temperature of this system only decreases by 0.55℃,effectively alleviating the soil heat imbalance problem.Compared with the parallel system,the evaporator inlet temperature increases by 4℃,the unit COP increases by 5%,and the solar heat utilization rate increases by 24%;Compared with the series system,the power consumption decreases by 322 kW·h,the heat production increases by 5025 kW·h,and the system COP increases by 2%.The buried pipe of this system is designed according to 50%of the heat extraction of the unit,which is more suitable for areas with limited drilling area.

关 键 词：热网回水 地源热泵 土壤热失衡 太阳能热利用率 

分 类 号：TU83[建筑科学—供热、供燃气、通风及空调工程]