岩石热源热泵系统的设计及实验分析  

Design and Experimental Analysis of Rock Heat Source Heat Pump System

作　　者：唐青松 武海滨 车建平 董涛 刘建 李洋 TANG Qingsong;WU Haibin;CHE Jianping;DONG Tao;LIU Jian;LI Yang

机构地区：[1]新奥(中国)燃气投资有限公司,北京100000

出　　处：《煤气与热力》2019年第9期1-9,J0041,共10页Gas & Heat

摘　　要：目前中深层地热资源利用方式以直接抽取地热水为主,很难做到100%同层回灌,将带来生态环境问题,因此,中深层地热利用受到限制。为了更好地利用中深层地热资源,提出一种中深层地热利用方案--岩石热源热泵技术,即建立密闭的地下换热器,利用循环水进入地下换热器吸热,吸热后的循环水用作供暖热源。介绍岩石热源热泵的原理,其由地下换热器、热泵机组、水泵等设备及控制系统构成。岩石热源热泵的运行模式根据热泵机组是否开启分为直供模式和热泵模式。介绍直供模式及热泵模式的工艺流程、地下换热器的类型,分析U形、L形及同轴套管式3种地下换热器的优缺点,指出在1 500~2 500 m深度范围内,同轴套管式地下换热器技术更成熟且经济性更好,更适合岩石热源热泵。结合新乡示范项目,进行技术验证,介绍示范项目的岩石热源热泵的工艺流程设计、设备选型,制定实验方案、数据采集及处理方案并进行实验,分析直供模式及热泵模式热源侧平均制热性能系数。示范项目实验结果显示,任何时段直供模式热源侧平均制热性能系数均大于9,热泵模式热源侧平均制热性能系数为3.1~3.8,热源侧供暖期制热性能系数(简称HSPF)为4.07,比土壤源热泵HSPF高35.6%,节能效果十分显著,该技术适合北方地区清洁供暖。增加直供模式运行时间可以提升岩石热源热泵HSPF,因此,运行时在满足用户供暖需求的情况下应尽可能多地使用直供模式。示范项目也暴露出热泵机组本身制热性能系数不高、智能化运行水平低等问题,有待进一步改进。文末附有岩石热源热泵的视频,可扫二维码观看。At present,middle and deep geothermal resources are mainly utilized by directly extracting geothermal water,but it is difficult to recharge100%of the geothermal resources in the same layer,which will bring ecological and environmental problems.Therefore,the utilization of middle and deep geothermal resources is limited.In order to make better use of middle and deep geothermal resources,a middle and deep geothermal utilization scheme,rock heat source heat pump system technology,is proposed,namely,a sealed underground heat exchanger is built,the circulating water is used to enter the heat exchanger to absorb heat,and the circulating water after heat absorption is used as heat source for heating.The principle of rock heat source heat pump is introduced,which consists of underground heat exchanger,heat pump unit,water pump,other auxiliary equipment and control system.The operation mode of rock heat source heat pump is divided into direct supply mode and heat pump mode according to whether the heat pump unit is turned on.The process flow of direct supply mode and heat pump mode and the types of underground heat exchanger are introduced.The advantages and disadvantages of three underground heat exchangers,U-shaped,L-shaped and coaxial bushing type are analyzed.In the range of 1 500 to 2 500 m depth,coaxial bushing type underground heat exchanger is more mature in technology and economical,which is more suitable for rock heat source heat pump.Combined with Xinxiang demonstration project,technical verification is carried out.The process design and equipment selection of the rock heat source heat pump for the demonstration project are introduced.The experimental scheme,data acquisition and processing scheme are developed,and the experiment is carried out.The average heating performance coefficients of heat source side of direct supply mode and heat pump mode are analyzed.The experimental results of the demonstration project show that the aver-age heating performance coefficient of heat source side of direct supply mode at

关 键 词：中深层地热 岩石热源热泵 直供模式 热泵模式 地下换热器 

分 类 号：TU833.3[建筑科学—供热、供燃气、通风及空调工程]