本文選題：地源熱泵系統(tǒng)　切入點：動態(tài)負荷　出處：《太原理工大學》2013年碩士論文　論文類型：學位論文

【摘要】：中國城市化和工業(yè)化的飛速發(fā)展以及人們對生活水平的高要求直接導致建筑能耗占總商品能耗比例的增加,能源供應(yīng)越來越緊張,因此建筑節(jié)能已成為各行各業(yè)關(guān)注的熱點。而建筑節(jié)能又應(yīng)以調(diào)整建筑運行能耗、提高暖通行業(yè)能源利用率為重點。地源熱泵技術(shù)作為暖通空調(diào)新技術(shù),以可再生能源為冷熱源,既節(jié)能又環(huán)保,被認為是最有發(fā)展?jié)摿Φ墓?jié)能技術(shù)之一。地下?lián)Q熱部分是地源熱泵系統(tǒng)區(qū)別于傳統(tǒng)空調(diào)系統(tǒng)的地方,地下?lián)Q熱器通過與土壤之間的熱量交換達到調(diào)整室內(nèi)熱濕環(huán)境的目的。室內(nèi)冷熱負荷的動態(tài)變化導致地埋管換熱器換熱性能的動態(tài)變化,這種動態(tài)變化反過來又會影響到地源熱泵機組的運行狀況。因此室內(nèi)末端、地源熱泵機組及地埋管換熱器之間能否合理正確的匹配關(guān)系到整個系統(tǒng)能否正常運行。本文以某收費站所使用的地源熱泵系統(tǒng)為研究對象,通過輸入建筑逐時動態(tài)負荷來分析其動態(tài)變化特性。首先,在建筑熱環(huán)境模擬軟件包DeST中建立模型,并模擬了全年逐時動態(tài)負荷；然后,考慮到地埋管換熱器進出水管的不同換熱狀態(tài),提出了沿深度方向的三區(qū)換熱理論；利用該理論分析了動態(tài)負荷對地埋管換熱器換熱性能的影響；最后,使用多元線性回歸法分析了地埋側(cè)和負荷側(cè)各參數(shù)之間的耦合關(guān)系,得到了耦合公式,并驗證了公式的可靠性。為了更好的分析地埋管換熱器的換熱性能,在實驗研究的基礎(chǔ)上,應(yīng)用FLUENT軟件對單U型地埋管換熱器的土壤溫度場進行了三維數(shù)值模擬,結(jié)合實測溫度數(shù)據(jù)對模型的可靠性進行了驗證；接著對單U型管的換熱性能的模擬結(jié)果進行了分析,同時還分析了進水溫度和流量兩個因素對換熱性能的影響。
[Abstract]:The rapid development of urbanization and industrialization in China and people's high demand for living standards directly lead to the increase of building energy consumption as a proportion of total commodity energy consumption, and the energy supply is becoming increasingly tight. Therefore, building energy conservation has become a hot spot in various industries, and building energy saving should focus on adjusting building operation energy consumption and improving energy efficiency of HVAC industry. Ground source heat pump technology is a new HVAC technology. Taking renewable energy as the source of cold and heat, it is considered to be one of the most promising energy saving technologies. The underground heat transfer is the difference between the ground source heat pump system and the traditional air conditioning system. The heat exchange between underground heat exchanger and soil can adjust the indoor heat and humidity environment. The dynamic change of indoor heat and cold load leads to the dynamic change of heat transfer performance of underground heat exchanger. This dynamic change will, in turn, affect the operation of ground-source heat pump units. The reasonable and correct matching between ground source heat pump unit and ground buried tube heat exchanger is related to the normal operation of the whole system. In this paper, the ground source heat pump system used in a toll collection station is taken as the research object. The dynamic characteristics of buildings are analyzed by inputting hourly dynamic load. Firstly, the model is established in the building thermal environment simulation software package DeST, and the year-round hourly dynamic load is simulated. Considering the different heat transfer states of the inlet and outlet pipes of the underground tube heat exchanger, the three-zone heat transfer theory along the depth direction is put forward, and the influence of the dynamic load on the heat transfer performance of the ground buried tube heat exchanger is analyzed. The coupling relationship between the parameters of buried side and load side is analyzed by using multivariate linear regression method, and the coupling formula is obtained, and the reliability of the formula is verified. On the basis of experimental research, the soil temperature field of single U-type buried tube heat exchanger was simulated by FLUENT software, and the reliability of the model was verified with the measured temperature data. Then the simulation results of the heat transfer performance of single U tube are analyzed, and the influence of influent temperature and flow rate on the heat transfer performance is also analyzed.
【學位授予單位】：太原理工大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TU83

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