太阳能热水和热泵复合热源的辐射供暖系统的优化设计研究

发布时间：2018-01-12 11:41

  本文关键词：太阳能热水和热泵复合热源的辐射供暖系统的优化设计研究　出处：《东南大学》2015年硕士论文　论文类型：学位论文

  更多相关文章： 太阳能 供暖系统 优化 经济性 节能环保

【摘要】：为满足我国生态文明建设的发展需求,本文研究了一种采用太阳能和热泵作为热源的建筑辐射供暖系统,以南京地区的一栋供暖面积为335.740m2的三层别墅型住宅建筑为研究对象,通过系统建模和模拟分析的方法展开研究工作,主要研究成果包括以下五个方面：1、利用DeST软件模拟建筑逐时负荷,得到供暖期的建筑总能耗为65047.869MJ。设计采用舒适、节能环保的太阳能热水和热泵复合热源的辐射供暖系统,对系统中的太阳能集热器、蓄热水箱和空气源热泵进行理论分析和数学模型建立,并对部分设备进行了选型。2、根据理论计算模型得出7组典型设计参数,以蓄热水箱体积与集热面积的比值(VAR)表示分别为0.027m,0.033m,0.041m,0.053m,0.073m,0.115m和0.235m。3、利用TRNSYS软件建立系统模型,根据以上7组参数进行系统模拟研究,结果显示：VAR在0.027-0.235m范围内变化时,平均集热效率在0.373～0.488之间,日平均有效集热量在278.996-295.506MJ之间,供暖期热泵的耗电量在2718～2905kWh之间。4、根据TRNSYS软件模拟结果,优化研究太阳能集热系统的集热面积、蓄热水箱体积和集热温度。从系统投资(费用年值法)、蓄热水箱中水温的变化情况以及太阳能保证率方面研究,结果表明：VAR在0.053～0.073m范围内时,系统费用年值较低,此时集热过程中蓄热水箱内的平均水温可达42y47℃,能够满足辐射末端供水温度的要求,供暖期太阳能保证率在53.258%左右,VAR的变化对系统的太阳能保证率影响小于5.750%。设计研究以VAR=0.053m为例,Ac=64m2,Vw=3.403m3,建筑供暖面积与集热面积的比值为5.2：1,供暖期的太阳能保证率为53.104%。5、根据优化后的设计参数从经济效益、节能环保效益方面,对太阳能热水和热泵复合热源的供暖系统与燃油锅炉、燃气锅炉、电辅助太阳能供暖系统进行对比分析。结果显示：太阳能热水和热泵复合热源的供暖方案的费用年值最低,为10246元／年,且该系统每年可节省标准煤为2.555吨,二氧化碳减排量为6.801吨。本文模拟研究了太阳能热水和热泵复合热源的供暖系统的运行和应用特性,对南京地区太阳能供暖系统设计和设备选型具有借鉴作用。
[Abstract]:In order to meet the development needs of ecological civilization construction in China, this paper studies a building radiation heating system using solar energy and heat pump as heat source. Taking a three-story villa residential building with a heating area of 335.740m2 in Nanjing area as the research object, the research work is carried out through the method of system modeling and simulation analysis. The main research results include the following five aspects: 1, using DeST software to simulate the hourly load of buildings, the total energy consumption in heating period is 65047.869 MJ. the design is comfortable. The solar energy collector, storage tank and air source heat pump in the system are analyzed theoretically and the mathematical model is established for the radiation heating system of solar water heating and heat pump combined with heat pump with energy saving and environmental protection. According to the theoretical calculation model, 7 groups of typical design parameters are obtained, which are expressed as 0.027 m by the ratio of the volume of storage tank to the area of collecting heat. The system model was established by using TRNSYS software. According to the system simulation of the above 7 groups of parameters, the results show that the average heat collection efficiency is between 0.373 and 0.488 when the VAR varies in the range of 0.027-0.235m. The average daily effective heat collection is between 278.996-295.506MJ, and the energy consumption of heat pump during heating period is between 27185kWh and 2905kWh. According to the simulation results of TRNSYS software, the area of solar energy collector, the volume of storage tank and the collection temperature are optimized. The variation of water temperature in the storage tank and the solar energy guarantee rate are studied. The results show that the annual cost of the system is lower when the VAR is within the range of 0.053 ~ 0.073 m. At this time, the average water temperature in the storage tank can reach 42 y47 鈩，

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