發(fā)布時(shí)間：2019-06-04 05:48

【摘要】：建立了模擬嚴(yán)寒地區(qū)土壤熱失衡狀態(tài)下地源熱泵冬季運(yùn)行情況的實(shí)驗(yàn)裝置,實(shí)驗(yàn)研究了地埋管周圍土壤凍結(jié)區(qū)域的分布特征,給出了凍結(jié)相變鋒面的平均移動(dòng)速度。結(jié)果表明,土壤凍結(jié)區(qū)域呈不對(duì)稱性分布,流體進(jìn)口溫度為-15℃時(shí),埋深為350、700、1 050mm,熱響應(yīng)區(qū)在40~60mm段,凍結(jié)鋒面的平均移動(dòng)速率分別為5、5、6.67mm/h,熱響應(yīng)區(qū)在60~80mm段,凍結(jié)鋒面的平均移動(dòng)速率分別為1.54、1.82、1.82mm/h;土壤凍結(jié)在一定程度上有利于地埋管與周圍土壤之間的換熱,在嚴(yán)寒地區(qū)地源熱泵的設(shè)計(jì)中應(yīng)考慮土壤凍結(jié)現(xiàn)象。
[Abstract]:An experimental device was established to simulate the operation of ground source heat pump in winter under the condition of soil thermal imbalance in severe cold region. The distribution characteristics of soil freezing area around the buried pipe were studied, and the average moving speed of frozen phase change front was given. The results show that the frozen area of soil is asymmetrical. When the inlet temperature of the fluid is-15 鈩，

本文編號(hào)：2492517