注入温度对增强型地热系统性能的影响研究  

STUDY ON IMPACT OF INJECTION TEMPERATURE ON PERFORMANCE OF ENHANCED GEOTHERMAL SYSTEMS

作　　者：王昌龙 黄志甲[1] 李欢 鲁进利[1] 黄新杰[1] 甘琳 Wang Changlong;Huang Zhijia;Li Huan;Lu Jinli;Huang Xinjie;Gan Lin(School of Civil Engineering and Architecture,Anhui University of Technology,Ma'anshan 243002,China)

机构地区：[1]安徽工业大学建筑工程学院,马鞍山243002

出　　处：《太阳能学报》2021年第3期179-183,共5页Acta Energiae Solaris Sinica

基　　金：安徽省自然科学基金(1808085QE178)。

摘　　要：基于考虑增强型地热系统(EGS)流体损失的三维传热传质数值模型,将热提取速率定义为与注入温度无关的函数,对比分析注入温度对以CO_(2)为工质的EGS(CO_(2)-EGS)和以水为工质的EGS(H2O-EGS)的性能的影响。结果发现:对于CO_(2)-EGS,较高的注入温度抑制热开采和CO_(2)损失(即CO_(2)封存);对于H2O-EGS,较高的注入温度促进热开采,同时导致较大的水损失。当热提取速率被大部分研究者定义为与注入温度相关的函数时,注入温度对CO_(2)-EGS和H2O-EGS的热开采性能的影响将分别被高估和低估。Based on a 3 D thermal-hydrologic numerical model considering fluid losses for enhanced geothermal systems(EGS),heat extraction rate is defined as a function independent of injection temperature,and the CO_(2)-EGS(EGS with CO_(2)as the working fluid)and the H2O-EGS(EGS with water as the working fluid)are compared for different injection temperatures. The results show that higher injection temperature restrains heat extraction and CO_(2)losses(i.e. CO_(2)sequestration)for the CO_(2)-EGS,and that higher injection temperature enhances heat extraction but leads to more water losses for the H2O-EGS. When heat extraction rate is defined by most researchers as a function dependent of injection temperature,the influence of injection temperature on heat extraction performance would be overestimated and underestimated for the CO_(2)-EGS and the H2O-EGS,respectively.

关 键 词：地热能 增强型地热系统(EGS) 热开采 CO2封存 水损失 注入温度 

分 类 号：TK521[动力工程及工程热物理—热能工程]