本文關鍵詞：蘭州地區(qū)太陽能供熱系統(tǒng)研究　出處：《蘭州理工大學》2013年碩士論文　論文類型：學位論文

  更多相關文章： 窗墻面積比 太陽能供熱系統(tǒng) 系統(tǒng)設計 建筑模擬

【摘要】：蘭州地區(qū)氣候干燥,氣溫日溫差較大,光照充足,太陽輻射強,光能潛力巨大。城市建筑以多高層建筑為主,人均占有面積小,大部分居住建筑已安裝天然氣管道,使用方便。采用太陽能輔助天然氣的供暖和生活熱水技術,既可以充分利用蘭州地區(qū)豐富的太陽輻射資源,節(jié)約能源,保護環(huán)境,又能彌補太陽輻射能的不穩(wěn)定性和間斷性等特點。 首先,在太陽輻射理論計算的基礎上,建立了水平面、垂直面和傾斜面上的太陽輻射強度計算模型,為分析建筑的圍護結構或集熱系統(tǒng)吸收太陽輻射能建立基礎。 其次,針對蘭州地區(qū)居住建筑普遍增大南向外窗面積以獲取太陽輻射熱量,輔助提高房間冬季采暖溫度的現(xiàn)象,以蘭州地區(qū)某典型建筑為例建立仿真模型,依據蘭州地區(qū)太陽輻射強度參數,利用DeST軟件對南向窗墻面積比對房間室內溫度的影響進行仿真模擬,分析室內溫度的變化規(guī)律,總結得到蘭州地區(qū)的窗墻面積比取值為0.4-0.6最佳,過小會浪費太陽能資源,過大會加劇室內溫度波動,還會造成過熱現(xiàn)象。由于利用外窗得熱不能充分利用太陽能資源,并會造成溫度波動和過熱等現(xiàn)象,提出太陽能輔助天然氣供暖和生活熱水系統(tǒng),介紹了系統(tǒng)的主要組成部分和運行原理,對集熱器,儲熱水箱和低溫地板輻射系統(tǒng)等主要部件的性能和優(yōu)化設計進行了理論分析。 接著,以蘭州地區(qū)典型多層建筑為例,依據上述理論分析,進行了集中集熱-分戶儲熱式太陽能輔助天然氣供暖和生活熱水系統(tǒng)的優(yōu)化設計。為驗證所設計系統(tǒng)的性能,利用TRNSYS軟件對該系統(tǒng)建立仿真模型進行模擬計算,并繪制出房間采暖溫度,采暖負荷,集熱器效率,太陽能保證率和太陽能供熱量等曲線,分析了該建筑的用熱情況和系統(tǒng)的實際運行效果。 最后,對所設計的太陽能供熱系統(tǒng)的節(jié)能效益進行分析計算,結果證明蘭州地區(qū)太陽能利用的節(jié)能效益顯著,為蘭州地區(qū)推廣應用太陽能供熱技術提供依據。
[Abstract]:Lanzhou has a dry climate, large daily temperature difference, sufficient light, strong solar radiation, great potential of light energy. Urban buildings are mainly multi-high-rise buildings, the per capita area is small. Most residential buildings have installed natural gas pipeline, easy to use. The use of solar assisted natural gas heating and domestic hot water technology, not only can make full use of the abundant solar radiation resources in Lanzhou area, saving energy. Protection of the environment, but also to compensate for solar radiation energy instability and discontinuity and other characteristics. Firstly, based on the theoretical calculation of solar radiation, the calculation models of solar radiation intensity on horizontal plane, vertical plane and inclined plane are established. This paper establishes a foundation for analyzing the solar radiation energy absorbed by the building's enclosure or heat collecting system. Secondly, in view of the phenomenon that living buildings in Lanzhou region generally increase the area of exterior window to obtain solar radiation heat and increase the room heating temperature in winter, a typical building in Lanzhou area is taken as an example to establish a simulation model. According to the parameters of solar radiation intensity in Lanzhou area, the influence of the area ratio of the south window wall to the room temperature is simulated by using DeST software, and the variation law of indoor temperature is analyzed. It is concluded that the area ratio of window and wall in Lanzhou area is the best 0.4-0.6, which will waste solar energy resources and aggravate indoor temperature fluctuation. As the use of external windows can not make full use of solar energy resources, and will cause temperature fluctuations and overheating phenomena, solar assisted natural gas heating and domestic hot water system is put forward. The main components and operation principle of the system are introduced. The performance and optimization design of the main parts such as collector, hot water tank and low temperature floor radiation system are analyzed theoretically. Then, the typical multi-storey buildings in Lanzhou area as an example, according to the above theoretical analysis. The optimization design of the centralized heat collection and household heat storage solar assisted natural gas heating and domestic hot water system was carried out to verify the performance of the designed system. The simulation model of the system is established by TRNSYS software, and the curves of room heating temperature, heating load, collector efficiency, solar energy guarantee rate and solar energy supply are drawn. The use of heat of the building and the actual operation effect of the system are analyzed. Finally, the energy-saving benefits of the designed solar heating system are analyzed and calculated. The results show that the energy-saving benefits of solar energy utilization in Lanzhou area are remarkable, which provides the basis for the popularization and application of solar energy heating technology in Lanzhou area.
【學位授予單位】：蘭州理工大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TU832.17

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