本文選題：地源熱泵　切入點：綜合導(dǎo)熱系數(shù)　出處：《可再生能源》2017年12期 　論文類型：期刊論文

【摘要】：為了探究利用加權(quán)平均估算方法來評估分層巖土體綜合導(dǎo)熱系數(shù)的合理性,以及提高評估結(jié)果的準(zhǔn)確性,文章基于不同巖土層導(dǎo)熱系數(shù)在加權(quán)平均估算方法中的權(quán)重差異,提出了權(quán)系數(shù)改良方法,并通過實例對權(quán)系數(shù)改良前后的加權(quán)平均估算方法進(jìn)行比較。研究結(jié)果表明:由于地埋管沿程換熱特性的影響,巖土體分層導(dǎo)熱系數(shù)對綜合導(dǎo)熱系數(shù)的影響權(quán)重沿深度方向近似呈現(xiàn)出線性減小的變化趨勢;利用簡單加權(quán)平均估算方法得到的巖土體綜合導(dǎo)熱系數(shù)與本文模擬結(jié)果之間的相對誤差δ1不超過11.9%,并且利用該估算方法只能得到巖土體綜合導(dǎo)熱系數(shù)的大致范圍;利用改良加權(quán)平均估算方法得到的巖土體綜合導(dǎo)熱系數(shù)與本文模擬結(jié)果之間的相對誤差δ2低于δ1,且二者的最大差值為4%。綜上可知,改良加權(quán)平均估算方法的估算結(jié)果更加準(zhǔn)確。
[Abstract]:In order to explore the rationality of using weighted average estimation method to evaluate the comprehensive thermal conductivity of layered rock and soil mass, and to improve the accuracy of the evaluation results, the paper bases on the weight difference of the thermal conductivity of different rock and soil layers in the weighted average estimation method. The method of weight coefficient improvement is put forward, and the weighted average estimation method before and after the improvement of weight coefficient is compared by an example. The results show that the influence of the heat transfer characteristics of buried pipes along the course is the result of the comparison of the weighted average estimation method before and after the improvement of weight coefficient. The influence of stratified thermal conductivity of rock and soil on the comprehensive thermal conductivity the weight shows a linear decreasing trend along the depth direction. The relative error (未 _ 1) between the comprehensive thermal conductivity of rock and soil and the simulation results obtained by using the simple weighted average method is not more than 11.9. and the approximate range of the comprehensive thermal conductivity of rock and soil can only be obtained by using this method. The relative error between the comprehensive thermal conductivity of rock and soil and the simulated results of this paper is lower than 未 1, and the maximum difference between the two is 4. In summary, it can be seen that the estimation results of the modified weighted average method are more accurate.
【作者單位】： 山東省地礦工程集團(tuán)有限公司;天津大學(xué)機(jī)械工程學(xué)院中低溫?zé)崮芨咝Ю媒逃恐攸c實驗室;
【基金】：國家自然科學(xué)基金項目(41672234)
【分類號】：TU83

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