本文選題：地源熱泵 + 地埋管換熱器�。� 參考：《化工學(xué)報(bào)》2016年S2期

【摘要】：垂直地埋管換熱器周圍地溫場(chǎng)的變化對(duì)地源熱泵的性能會(huì)產(chǎn)生重大影響。為長期準(zhǔn)確高效地預(yù)測(cè)地溫場(chǎng),提出了一種耦合地源熱泵系統(tǒng)COP的地溫場(chǎng)三維模型,考慮空氣邊界、地下水滲流和土壤分層帶來的影響。為降低計(jì)算負(fù)荷,將整個(gè)地埋管換熱器簡(jiǎn)化為一維線熱源。計(jì)算區(qū)域頂部設(shè)置第三類邊界條件,以模擬土壤與空氣的對(duì)流傳熱。采用交替方向隱式差分法離散非穩(wěn)態(tài)能量方程,以提高計(jì)算穩(wěn)定性。利用文獻(xiàn)中的數(shù)據(jù)對(duì)模型進(jìn)行驗(yàn)證,結(jié)果表明,所有溫度預(yù)測(cè)值的絕對(duì)誤差均小于±1.00℃,土壤內(nèi)部測(cè)點(diǎn)溫度尤其準(zhǔn)確(均小于±0.20℃),最大誤差出現(xiàn)在鉆孔外壁。因此,模型能夠準(zhǔn)確快速地預(yù)測(cè)地溫場(chǎng)的分布和地源熱泵系統(tǒng)的性能。該模型尤其適用于地下水滲流復(fù)雜、存在明顯土壤物性分層的地區(qū)。
[Abstract]:The variation of ground temperature field around vertical buried tube heat exchanger has great influence on the performance of ground source heat pump. In order to predict the ground temperature field accurately and efficiently for a long time, a 3D model of ground temperature field of coupled ground source heat pump system (COP) is presented, which takes into account the influence of air boundary, groundwater seepage and soil stratification. In order to reduce the calculation load, the whole buried tube heat exchanger is simplified to one dimensional line heat source. A third boundary condition is set at the top of the calculation area to simulate convective heat transfer between soil and air. The alternating direction implicit difference method is used to discretize the unsteady energy equation in order to improve the stability of the calculation. The results show that the absolute error of all temperature prediction values is less than 鹵1.00 鈩，

本文編號(hào)：1826930