本文關(guān)鍵詞：利用窮舉搜索法準(zhǔn)確確定地下熱物性參數(shù)　出處：《工程熱物理學(xué)報(bào)》2017年04期 　論文類型：期刊論文

  更多相關(guān)文章： 巖土 熱物性參數(shù) 測量 窮舉搜索法

【摘要】：利用窮舉搜索法結(jié)合參數(shù)估計(jì)方法確定地下巖土熱物性參數(shù),通過模擬驗(yàn)證該方法的可靠性,并用于實(shí)際工程測量,且與優(yōu)化方法計(jì)算結(jié)果進(jìn)行對比分析。結(jié)果表明窮舉搜索法可以在搜索區(qū)域得到目標(biāo)函數(shù)方差和最小值,基于此得到熱物性參數(shù)值可靠性較高;而優(yōu)化方法得到的目標(biāo)函數(shù)方差和為局部區(qū)域的極小值,其確定的土壤導(dǎo)熱系數(shù)可靠性較高,但鉆孔內(nèi)熱阻和容積比熱計(jì)算結(jié)果可信度相對較低。
[Abstract]:The parameters of thermal properties of underground rock and soil are determined by exhaustive search method combined with parameter estimation method. The reliability of the method is verified by simulation and used in practical engineering measurement. The results show that the exhaustive search method can obtain the variance and minimum value of the objective function in the search area, and the reliability of the obtained thermal physical parameters is high. However, the variance of the objective function obtained by the optimization method is the minimum value of the local region, and the reliability of the soil thermal conductivity determined by the optimization method is relatively high, but the reliability of the calculation results of the thermal resistance and volume specific heat in the borehole is relatively low.
【作者單位】： 山東建筑大學(xué)熱能工程學(xué)院;可再生能源建筑利用技術(shù)教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金項(xiàng)目(No.51176104) 國家重點(diǎn)研發(fā)計(jì)劃(No.2016YFC0700803)
【分類號】：TU831
【正文快照】： 0引言地源熱泵地?zé)釗Q熱器w利用泵功使循環(huán)水在地 的導(dǎo)熱系數(shù)、容積比熱容等熱物性參數(shù)[7】。常用的埋管中循環(huán)流動,把地下淺層土壤作為熱源,利用 傳熱模型有線熱源模型181、空心柱熱源模型實(shí)其溫度隨季節(jié)變化浮動較小的特點(diǎn),將循環(huán)水作為 心柱熱源模型i1Qi等,計(jì)算土壤熱物性，

本文編號：1384407