本文選題：建筑節(jié)能 + 地源熱泵��； 參考：《湖南大學(xué)》2015年碩士論文

【摘要】：隨著我國(guó)城市化進(jìn)程的加快,每年新增建筑面積約18億~20億m2,預(yù)計(jì)到2020年底,我國(guó)新增建筑面積將達(dá)到300億m2。如此大規(guī)模的新增建筑,建筑能耗無(wú)疑也是巨大的。目前我國(guó)建筑業(yè)與工業(yè)、交通一起被列為重點(diǎn)節(jié)能行業(yè),并且建筑將超越工業(yè)、交通等其他行業(yè)居于社會(huì)能源消耗的首位,因此建筑節(jié)能也日益重要。而地源熱泵技術(shù)的應(yīng)用對(duì)緩解建筑能耗具有重大意義。地源熱泵在我國(guó)已經(jīng)有一定的使用規(guī)模,但是在地源熱泵系統(tǒng)設(shè)計(jì)和運(yùn)行過(guò)程中仍然存在一些問(wèn)題值得設(shè)計(jì)人員注意。本文結(jié)合岳陽(yáng)市宏潤(rùn)家園的空調(diào)與衛(wèi)生熱水工程,對(duì)地源熱泵系統(tǒng)設(shè)計(jì)過(guò)程中的一些問(wèn)題做以下研究:1.對(duì)于大型住宅建筑在負(fù)荷計(jì)算時(shí),由于空調(diào)使用的不確定性大,有必要考慮同時(shí)使用系數(shù)。在埋管總長(zhǎng)度的計(jì)算上,規(guī)范中理論計(jì)算得到的結(jié)果與通過(guò)土壤性測(cè)試后計(jì)算得到的結(jié)果有一定的誤差,因此對(duì)于大型的地源熱泵系統(tǒng)做土壤熱物性測(cè)試很有必要。就地源熱泵系統(tǒng)的埋管深度建立數(shù)學(xué)模型,得出在單位井深換熱量和地埋管側(cè)進(jìn)出水溫差一定,埋管深度必須大于一定的數(shù)值時(shí)才能滿足規(guī)范規(guī)定的地埋管內(nèi)的最低流速要求。另外在廣大夏熱冬冷地區(qū),通常夏季的冷負(fù)荷遠(yuǎn)大于冬季的熱負(fù)荷,為平衡土壤的冷熱量采用冷卻塔輔助散熱。對(duì)于本文負(fù)荷較大的建筑,在部分負(fù)荷及滿負(fù)荷狀態(tài)下就地源熱泵機(jī)組和冷卻塔的運(yùn)行控制提出了一種高效可行的控制策略。2.在生活熱水系統(tǒng)的選擇上,設(shè)計(jì)了太陽(yáng)能熱水與地源熱泵熱水相結(jié)合熱水供應(yīng)方式。對(duì)于生活熱水熱泵機(jī)組與空調(diào)熱泵機(jī)組聯(lián)合運(yùn)行時(shí),夏季生活熱水機(jī)組從土壤中取熱,而空調(diào)機(jī)組則向土壤中釋熱。本文對(duì)這種復(fù)合式地源熱泵系統(tǒng)的夏季運(yùn)行提出兩種運(yùn)行策略,并分析了這兩種運(yùn)行策略的可靠性。從而得出在這兩種運(yùn)行策略下,系統(tǒng)的效率都有所提高。3.對(duì)目前太陽(yáng)能系統(tǒng)中常用的分層蓄熱水箱進(jìn)行介紹和分析。通過(guò)分析得出分層蓄熱水箱具有啟動(dòng)快、加熱循環(huán)周期長(zhǎng)、效率高等優(yōu)點(diǎn)。對(duì)于集中熱水供應(yīng)系統(tǒng)的建筑建議采用分層蓄熱水箱,這將為建筑節(jié)省相當(dāng)可觀的熱水能耗。
[Abstract]:With the acceleration of urbanization in our country, the new building area is about 1.8 billion ~ 2 billion m2 per year. It is estimated that by the end of 2020, the new building area will reach 30 billion m2. Such a large scale of new buildings, building energy consumption is undoubtedly huge. At present, the construction industry, industry and transportation in our country are listed as the key energy saving industries together, and the construction will surpass the industry, and the traffic and other industries will occupy the first place in the social energy consumption, so the building energy saving is becoming more and more important. The application of ground source heat pump technology is of great significance to alleviate building energy consumption. Ground-source heat pump (GSHP) has been used on a certain scale in China, but there are still some problems in the design and operation of GSHP system. In this paper, combined with the air conditioning and sanitary hot water engineering of Hongrun Home in Yueyang City, some problems in the design of ground-source heat pump system are studied as follows: 1. For large residential buildings, it is necessary to consider the coefficient of simultaneous use due to the uncertainty of the use of air conditioning in load calculation. In the calculation of the total length of buried pipe, the results obtained by the theoretical calculation in the code have some errors compared with the results obtained after the soil test. Therefore, it is necessary for the large-scale ground-source heat pump system to test the soil thermal properties. The mathematical model of buried pipe depth of local source heat pump system is established. It is concluded that when the heat exchange in the unit well depth and the temperature difference between the inlet and outlet water on the side of the buried pipe are constant, the buried pipe depth must be greater than a certain value to meet the minimum velocity requirement in the underground pipe specified in the code. In addition, in the hot summer and cold winter areas, the cooling load in summer is much larger than the heat load in winter, and cooling tower is used to balance the cooling heat of soil. An efficient and feasible control strategy of local source heat pump unit and cooling tower under partial load and full load condition is proposed for the buildings with large loads in this paper. In the choice of the domestic hot water system, the hot water supply mode of the combination of solar hot water and ground source heat pump hot water is designed. For the combined operation of domestic hot water heat pump unit and air conditioning heat pump unit, the domestic hot water unit takes heat from the soil in summer, while the air conditioning unit releases heat into the soil. This paper presents two operational strategies for the summer operation of this hybrid ground-source heat pump system and analyzes their reliability. Thus, under these two strategies, the efficiency of the system has been improved. 3. 3. This paper introduces and analyzes the stratified storage water tank commonly used in solar energy system. The results show that the stratified storage tank has the advantages of fast starting, long cycle and high efficiency. For the building of centralized hot water supply system, stratified water storage tank is recommended, which will save considerable energy consumption of hot water for the building.
【學(xué)位授予單位】：湖南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TU83

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