太阳能跨季节蓄能供热系统在中原地区的模拟研究

发布时间：2018-08-20 18:39

【摘要】：能源一直是人们赖以生存的资本,日益严重的能源危机给世界人们敲响了警钟,也促使各国大力推广可再生能源。太阳能跨季节蓄能是一种新兴的太阳能利用形式,可以有效提高太阳能利用率。但是这种环保节能的太阳能系统在中原地区的研究较少,鉴于此,本课题对太阳能跨季节蓄能供热系统建立模型,对该系统在中原地区的应用性能进行分析。本文首先介绍了太阳利用的相关背景并进行了理论分析,并对常见太阳能跨季节蓄能系统形式进行介绍,文中选择以热水形式储存太阳能能量。基于郑州地区一栋200m2的住宅作为系统分析模型建筑,使用De ST软件计算了该建筑的逐时热负荷,以此为基础对系统各部件进行初步选型。接着在太阳能跨季节蓄能供热系统运行原理的基础上,基于TRNSYS软件建立了系统的仿真模型,并对该模型进行验证,保证所建立模型的准确性;利用建立的模型,对太阳能跨季节蓄能供热系统中集热器面积、水池体积、水池高径比对系统的蓄热性能进行分析研究,研究表明:系统的蓄热量随高径比的增加整体呈现增加的趋势,在1.6~1.8之间达到最大值;在郑州市的气象条件下,系统较适宜的集热器面积为35~40m2,相对应的水池体积为50~60m3。在此条件下,太阳能跨季节蓄能供热系统的蓄热量为36~39GJ,系统的太阳能保证率为63%~72%,此时该系统在寿命期内共节省了18362元,系统的回收期为9年。最后在对中原地区性能分析基础上,基于建筑热工分区,选取四个代表性城市哈尔滨、长春、南京、福州,并对跨季节蓄能供热系统在这四个地区的运行性能进行了适用性分析,得到这四个地区的太阳能保证率分别为49%、51%、77%、55%,为该系统在我国的大面积产业化推广应用奠定了理论基础。
[Abstract]:Energy has always been the capital on which people depend for survival. The increasingly serious energy crisis has sounded the alarm bell for people all over the world and urged countries to vigorously promote renewable energy. Cross-seasonal solar energy storage is a new form of solar energy utilization, which can effectively improve solar energy utilization. However, there are few researches on this kind of solar energy system in Central Plains. In view of this, this paper establishes a model of solar energy storage heating system, and analyzes its application performance in Central Plains. In this paper, the background of solar energy utilization and its theoretical analysis are introduced, and the common solar energy storage system is introduced. In this paper, hot water is chosen to store solar energy. Based on a 200m2 residential building in Zhengzhou area as a system analysis model building, the hourly heat load of the building is calculated by using de ST software, based on which the initial selection of the system components is carried out. Then on the basis of the operation principle of solar energy cross-season energy storage heating system, the simulation model of the system is established based on TRNSYS software, and the model is verified to ensure the accuracy of the established model. The heat storage performance of collector area, pool volume and tank height to diameter ratio in solar energy cross-season energy storage heating system is analyzed. The results show that the heat storage capacity of the system increases with the increase of the ratio of height to diameter. Under the meteorological conditions in Zhengzhou, the optimum collector area is 35 ~ 40 m ~ (2) and the corresponding tank volume is 50 ~ (60) m ~ (3). Under this condition, the heat storage capacity of the solar energy storage heating system is 360.39GJ, and the solar energy guarantee rate of the system is 63.720.In this case, the system saves 18362 yuan in the lifetime, and the recovery period of the system is nine years. Finally, based on the performance analysis of the Central Plains, based on the building thermal zoning, four representative cities, Harbin, Changchun, Nanjing, Fuzhou, are selected. The applicability analysis of the cross-season energy storage heating system in these four regions has been carried out, and the solar energy guarantee rate of the four regions has been obtained, which is 49 / 51/ 7777 / 5555, respectively, which lays a theoretical foundation for the popularization and application of the system in China's large-scale industrialization.
【学位授予单位】：中原工学院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU832

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