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            暖通空調雜志社>期刊目次>2021年>第6期

            嚴寒地區太陽能-地埋管地源熱泵系統耦合性能研究

            Coupling performance of solar-ground source heat pump systems in severe cold zone

            劉逸[1] 陳培強[1] 成慶林[2] 許國鋒[2] 徐瑩[2]
            [1]哈爾濱商業大學 [2]東北石油大學 [3]哈爾濱商業大學

            摘要:

            為解決嚴寒地區采用地埋管地源熱泵系統供暖引起的土壤熱失衡問題,以太陽能輔助地埋管地源熱泵耦合系統為研究對象,分析了地埋管換熱器供能性能、系統運行1 a和10 a后的土壤溫度變化特性及土壤初始溫度與集熱器面積的關系,擬合得到了土壤初始溫度與單位建筑面積下最優集熱器面積的數學表達式,采用費用年值法對該耦合系統與常規燃煤鍋爐供暖系統進行了經濟性比較分析。結果表明:在冬季利用該耦合系統供暖且采用蓄熱水箱出口與地埋管出口溫差為10 ℃控制太陽能集熱系統輔助供暖的方案,耦合系統運行1 a后,土壤平均溫度升高0.09 ℃,土壤    熱平衡率為101%;10 a后土壤平均溫度升高0.35 ℃,土壤熱平衡率為104%;該耦合系統供暖經濟性優于傳統燃煤鍋爐供暖系統。

            關鍵詞:太陽能-地埋管地源熱泵,嚴寒地區,土壤初始溫度,集熱器面積,土壤熱平衡率

            Abstract:

            In order to solve the problem of soil heat imbalance caused by ground source heat pump system heating in severe cold zone, taking the solar-assisted ground source heat pump coupling system as the research object, analyses the energy supply performance of ground heat exchangers, the soil temperature variation characteristics after the system operating for one year and ten years respectively, and the relationship between the initial soil temperature and the collector area. Obtains the mathematical expression of the initial soil temperature and the optimal collector area per unit building area by fitting. Uses the annual cost method to compare the economy between the coupling system and the conventional coal-fired boiler heating system. The results show that when the coupling system is used for heating in winter and the temperature difference between the outlet of the hot water storage tank and the buried pipe is 10 ℃ to control the solar heating system for auxiliary heating, the average soil temperature increases by 0.09 ℃ and the soil heat balance rate is 101% after one year operation, and the average soil temperature increases by 0.35 ℃ and the soil heat balance rate is 104% after ten-year operation. The heating economy of the coupling system is better than that of the conventional coal-fired boiler heating system.

            Keywords:solar-groundsourceheatpump,severecoldzone,initialsoiltemperature,collectorarea,soilheatbalancerate

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