冀南农村住宅太阳能辅助浅层地热能系统运行特性分析  

Analysis of the operation characteristics of solarassisted shallow geothermal energy systems in rural residential areas in southern Hebei Province

作　　者：王海敏 李建伟 贾文广[1] 王彤辉 王旭 鲍玲玲 Wang Hai-Min;Li Jian-Wei;Jia Wen-Guang;Wang Tong-Hui;Wang Xu;Bao Ling-Ling(The First Geological Brigade of Hebei Geology and Mineral Resources Exploration Bureau,Handan 056001,China;School of Energy and Environmental Engineering,Hebei University of Engineering,Handan 056038,China)

机构地区：[1]河北省地质矿产勘查开发局第一地质大队,邯郸056001 [2]河北工程大学能源与环境工程学院,邯郸056038

出　　处：《Applied Geophysics》2024年第2期384-401,422,共19页应用地球物理（英文版）

基　　金：Thanks for the support of the project of Shallow geothermal energy+Research and demonstration of combined utilization of solarenergy(13000021GLN70RYZ3AACF);sponsored by the Natural Science Foundation of Hebei Province(E2023402072).

摘　　要：浅层地热具有分布广泛、储量巨大的特点,但对于北方农村建筑冬季供暖热负荷远大于夏季冷负荷,容易出现土壤的热失衡问题。本文以冀南地区农村住宅为例,设计了一套太阳能辅助浅层地热能系统。与原有浅层地源热泵系统相比,首先分析了目标建筑的室内外温差变化。其次监测土壤温度场和供回水温差的变化。最后对辅助系统的初投资和运行成本进行分析。结果表明:冬季地温场平均温度明显上升,通过太阳能和地源热泵交替运行,减少了从地下提取的热量,缩短了冬季取热量和夏季排热量不平衡周期,缓解了全年土壤冷热负荷不平衡的问题。地埋管进出水温度和换热效率有较大的提高,应用了辅助系统的系统能效比从2020年的3.40提高到了4.17,提高了0.77。太阳能辅助浅层地热能系统最佳配比为12.80m^(2)太阳能集热面积和1个地埋孔。太阳能辅助浅层地热能系统冬季供暖运行成本为18.86元/m^(2)。与单一地源热泵系统相比可节约37%的采暖、制冷及热水全年运行费用,与传统供暖制冷模式相比可以节约40%-45%的全年运行费用。Shallow geothermal heat has the characteristics of wide distribution and huge reserves.However,for northern rural buildings,the heating load in winter is much greater than the cooling load in summer,and thermal imbalance of the soil is prone to occur.This paper takes rural residences in southern Hebei as an example and designs a solar-assisted shallow geothermal energy system.Compared with the original shallow ground-source heat pump system,the indoor and outdoor temperature differences of the target building were first analyzed.Second,the changes in the soil temperature fi eld and the diff erences in the supply and return water temperature were monitored.Finally,the initial investment and operating costs of the assisted system are analyzed.The results show that the average ground temperature field increases significantly in winter.Through the alternate operation of solar energy and ground-source heat pumps,heat extraction from the ground is reduced,and the imbalance cycle of heat extraction in winter and heat removal in summer is shortened.It alleviates the imbalance of the cold and heat loads for soil throughout the year.The inlet and outlet water temperature and heat exchange effi ciency of the buried pipes have been signifi cantly improved.The energy effi ciency ratio of the system using the assisted system has increased from 3.40 in 2020 to 4.17,an increase of 0.77.The optimal ratio of the solar-assisted shallow geothermal energy system is a 12.80 m^(2) solar heat-collection area and one buried hole.The winter heating operating cost of the solar-assisted shallow geothermal energy system is 18.86 CNY/m^(2).It can save 37%of the annual operating costs of heating,cooling,and hot water compared to a single ground-source heat pump system and 40%–45%compared to traditional heating and cooling modes.

关 键 词：浅层地热能 热平衡 太阳能 最佳配比 经济分析 

分 类 号：TU241.91[建筑科学—建筑设计及理论] TU18[动力工程及工程热物理—热能工程] TK529