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            暖通空調雜志社>期刊目次>2021年>第6期

            中深層地熱能供暖地埋管換熱器傳熱分析

            medium-deep geothermal energy, ground heat exchanger, heat transfer, heat extraction, thermal influence radius, circulating fluid, underground rock and soil

            關春敏[1] 趙樹旺[2] 張文科[3] 孫炳巖[3] 王建華[3] 孫知曉[3] 方肇洪[4]
            [1]山東建筑大學 [2]山東中瑞新能源科技有限公司 [3]山東建筑大學 [4]山東中瑞新能源科技有限公司

            摘要:

            介紹了中深層地熱能套管式換熱器的結構和工作原理,建立了換熱管內循環流體及鉆孔周圍巖土介質的能量控制方程。以某地源熱泵工程項目為例,分析了鉆井深度、循環液流量及大地熱流對地埋管換熱器名義取熱量的影響,以及循環液進出口溫度的變化、地埋管換熱器的熱影響半徑、鉆孔壁的溫度分布,揭示了項目運行時取熱量、循環液及地下巖土相關參數的變化。

            關鍵詞:中深層地熱能,地埋管換熱器,傳熱,取熱量,熱影響半徑,循環液,地下巖土

            Abstract:

             Presents the structure and working principle of medium-deep geothermal energy double tube heat exchangers, and establishes the energy control equations for the circulating fluid in the heat exchange tubes and the rock and soil media around the borehole. Taking a ground source heat pump project as an example, analyses the effects of drilling depth, circulating fluid flow and geothermal flow on the nominal heat extraction of ground heat exchangers, as well as the changes of both the inlet and outlet temperatures of the circulating fluid, the thermal influence radius of ground heat exchangers, and the temperature distribution of the borehole wall. Reveals the changes of the heat extraction and the relevant parameters of circulating fluid and underground rock and soil during project operation.

            Keywords:Heattransferanalysisofgroundheatexchangersformedium-deepgeothermalenergyheating

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