CAJ | 학술논문

基于流场、温度场多场问题的有限元方法，对非等温管道流动的浅层地源热泵这一工程技术进行了数值模拟分析。首先，在假定的基础上给出了地源热泵多场问题的数学控制方程，然后利用COMSOL Multiphysics有限元软件建立了相应数值模型，对地源热泵的相关施工参数影响进行了分析。结果表明：随埋深增加，地埋管出水温度增加，每延米管长换热功率减少；地埋管内径越小，其出水温度越低，每延米管长换热功率也减小。两管靠得越近，两者之间的热阻就越小，导致热短路现象，进而影响进水管温度。随着导热系数的增大，出水温度将降低，每延米管长换热功率将增大，在回填材料导热系数小于或略大于岩土体导热系数时，使用好的导热系数回填材料在提高每延米管长换热功率效果方面比较明显，这种效果在进一步提高回填材料导热系数时将趋缓。
기우류장、온도장다장문제적유한원방법，대비등온관도류동적천층지원열빙저일공정기술진행료수치모의분석。수선，재가정적기출상급출료지원열빙다장문제적수학공제방정，연후이용COMSOL Multiphysics유한원연건건립료상응수치모형，대지원열빙적상관시공삼수영향진행료분석。결과표명：수매심증가，지매관출수온도증가，매연미관장환열공솔감소；지매관내경월소，기출수온도월저，매연미관장환열공솔야감소。량관고득월근，량자지간적열조취월소，도치열단로현상，진이영향진수관온도。수착도열계수적증대，출수온도장강저，매연미관장환열공솔장증대，재회전재료도열계수소우혹략대우암토체도열계수시，사용호적도열계수회전재료재제고매연미관장환열공솔효과방면비교명현，저충효과재진일보제고회전재료도열계수시장추완。
In view of the engineering technology of the ground source heat pump based on the non‐isothermal pipe flow ,finite element method based on flow field and temperature field is used to simulate it .Firstly ,these control equations for the ground source heat pump's problems are presented . Then , a related model is established by using finite element software called COMSOL Multiphysics . And the influence of construction parameters are analyzed . The research results show that with the increase of buried depth ,temperature of water coming from tubes increases and the thermal power per linear meter decreases .When distance between the two pipes gets closer ,the thermal resistance gets smaller ,w hich leads to thermal short‐circuiting , affecting the temperature of the inlet pipe . With the increase of the coefficient of thermal conductivity ,the temperature of outlet water decreases while the thermal power per linear meter increases .When the backfill material's coefficient of thermal conductivity is less than or slightly higher than that of rock soil mass ,using backfill materials w hich have high coefficient of thermal conductivity can greatly improve thermal power per meter .But this effect will slow dow n w hen further improving the backfill material's coefficient of thermal conductivity .