【摘要】：傳統(tǒng)土壤源熱泵的理論、應(yīng)用研究已經(jīng)十分成熟,并且在我國的使用得到了快速的增長。本文在傳統(tǒng)土壤源熱泵的基礎(chǔ)上,提出了一種新的使用方法。即在過渡季節(jié)或者濕度滿足的條件下,關(guān)閉冷水機組,采用雙U型地埋管換熱器將土壤冷能直接供入室內(nèi),并在室內(nèi)采用地板輻射進行供冷。本文以地埋管換熱理論中的二維有限長線熱源模型為基礎(chǔ),建立了雙U型地埋管換熱的非穩(wěn)態(tài)數(shù)學(xué)模型,并對數(shù)學(xué)方程進行了離散,為了求解穩(wěn)定性的需要,采用隱式差分的方式進行計算。針對室內(nèi)側(cè)地板輻射供冷,建立了完整的非穩(wěn)態(tài)數(shù)學(xué)模型,該模型考慮了室外氣象條件對于室內(nèi)的影響,同樣采用隱式差分的方式進行計算。上述數(shù)學(xué)模型均利用Visual Basic 6.0工具進行求解。通過對采用該系統(tǒng)的天津市天友建筑設(shè)計辦公建筑的實測,驗證了數(shù)學(xué)模型的正確性。本文利用所建立的數(shù)學(xué)模型對土壤冷源直供地板輻射供冷系統(tǒng)的運行特性進行了模擬研究。首先研究了直接供冷系統(tǒng)的供冷能力,建立了表征直接供冷系統(tǒng)供冷能力的指標(biāo)及水泵模型,在此基礎(chǔ)上研究了地埋管水流量、土壤平均溫度、地埋管埋設(shè)深度對單井埋深取冷量的影響,以及土壤平均溫度、供水溫度對季節(jié)供冷系數(shù)的影響;然后研究了直接供冷模式和開啟冷水機組模式下的土壤溫度場隨時間的變化情況;之后對所選的房間模型研究了影響地板表面平均溫度的因素,研究了地板表面平均溫度對人體熱舒適的影響,研究分析了系統(tǒng)供冷小時數(shù)的影響因素;最后對直接供冷模式和開啟冷水機組模式下的能耗進行模擬,結(jié)果表明直接供冷模式比開啟冷水機組模式節(jié)能54%,為土壤冷源直供地板輻射供冷系統(tǒng)的運行特性及策略等方面的研究提供了技術(shù)儲備和理論支持。
[Abstract]:The theory and application of traditional ground source heat pump (GSHP) is very mature, and its application in China has been increasing rapidly. Based on the traditional ground source heat pump, a new method is proposed in this paper. That is to say, under the condition of transitional season or humidity satisfied, the chiller is closed, and the soil cooling energy is directly supplied into the room by double U-type buried tube heat exchanger, and the floor radiation is used for cooling in the indoor. Based on the two-dimensional finite line heat source model in the theory of buried pipe heat transfer, the unsteady mathematical model of double U type buried pipe heat transfer is established, and the mathematical equations are discretized to solve the need of stability. Implicit difference method is used to calculate. A complete unsteady mathematical model is established for indoor floor radiation cooling. The model takes into account the influence of outdoor meteorological conditions on the indoor, and the implicit difference method is also used to calculate the model. All the above mathematical models are solved by Visual Basic 6.0. The correctness of the mathematical model is verified by measuring the office buildings designed by Tianyou architecture in Tianjin. In this paper, the mathematical model is used to simulate the operating characteristics of the radiant cooling system for soil cooling directly supplied by the floor. Firstly, the cooling capacity of the direct cooling system is studied, and the indexes and pump models are established to characterize the cooling capacity of the direct cooling system. On the basis of this, the water flow rate of the buried pipe and the average temperature of the soil are studied. The influence of buried pipe depth on the cooling rate of single well, and the influence of soil average temperature and water supply temperature on seasonal cooling coefficient; Then, the variation of soil temperature field with time in direct cooling mode and open chiller mode is studied, and then the factors influencing the average temperature of floor surface are studied for the selected room model. The influence of the average floor surface temperature on the thermal comfort of the human body was studied, and the factors affecting the cooling hours of the system were analyzed. Finally, the energy consumption in the direct cooling mode and the open chiller mode was simulated. The results show that the direct cooling mode can save 54% energy compared with the open chiller mode, which provides technical reserve and theoretical support for the study of the operating characteristics and strategy of the radiant cooling system of soil cooling directly supplied by the floor.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU83

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