【作者】 郭春杰；

【导师】 魏新利； 孟祥睿；

【作者基本信息】 郑州大学 ， 化工过程机械， 2013， 硕士

【摘要】 利用清洁可再生且蕴藏量丰富的太阳辐射能实现供暖,是缓解能源紧张问题和减少环境污染的有效措施之一,也是实现可持续发展的必经之路。集热器作为太阳能供暖系统的核心部件,提高其热性能对推进太阳能供暖技术的发展具有重要意义。集热器热性能的影响因素除了其自身结构外,还包括系统风量、太阳辐射强度和室外环境温度等运行参数。为探究系统风量对集热器热性能的影响,本文搭建了太阳能空气集热器实验台并进行了实验研究,利用CFD软件建立了集热板性能数值模拟计算模型并对其热性能参数进行了影响因素分析,根据模拟数据得出了相应工况下单位面积集热板上的最佳运行风量,本文的主要研究内容如下：搭建了由太阳辐射模拟装置、集热器和实验测试系统三部分组成的太阳能空气集热器实验台,并对0.94m3/h、1.41m3/h和1.87m3/h三种风量下集热器热性能的变化规律进行了实验研究,结果表明：在三种风量下稳定运行时,集热板表面温度分别为39.74℃、36.99℃和35.19℃,空气温升分别为22.45℃、17.57℃和14.37℃,集热效率分别为38.56%、45.13%和49.06%。利用CFD软件建立了集热板性能数值模拟计算模型并对其进行了验证,在此基础上对300W／m2≤I≤700W／m2、6℃≤Tamb≤12℃范围内各工况下流经集热板的压力损失、集热板表面温度、出口空气温度和空气温升、集热效率和换热效率等热性能参数进行了影响因素分析,根据各工况下的模拟数据得出了相应工况下单位面积集热板上的最佳运行风量,从而为实际工程中运行风量的选取提供参考依据,为太阳能空气集热器的设计与经济运行提供借鉴意义。更多还原

【Abstract】 The solar radiation energy is clean, renewable and abundant, so using it to realize heating is one effective way to ease the energy shortage problem and reduce the environment pollution, also it is the only way to achieve the sustainable development. As the core component of the whole solar heating system, improving the thermal performance of the solar collector has the important significance to promote the development of the solar heating technology. In addition to its own structure, the factors of collector’s thermal performance also include the air operationg flow, the solar radiation, ambient air temperarure and other operating parameters.To explore the thermal performance of air operating flow, a solar air collector system experimental platform was set up and the experimental study was carried out. Also the the numerical simulation model of collector plate’s performance was built by the CFD software and the simulation was done to analyse the factors influence on thermal performance parameters, the optimal operating flow were obtained according the simulation results of the thermal performance parameters under the corresponding conditions. The main research work are as follows:A solar air collector system experimental platform was built in this article, which consists of a solar radiation simulation device, solar collector and the test system. The experiment was done to get the thermal performances of the collector under the three air flow of0.94m3/h,1.41m3/h and1.87m3/h. The results demonstrated that the temperature of the solar collector plate were respectively39.74℃,36.99℃and35.19℃, the rise of air temperature were respectively22.45℃,17.57℃and14.37℃, and the thermal efficiency were respectively38.56%,45.13%and49.06%in the steady state of the three kinds of air flow.The numerical simulation model of collector plate’s performance was set up by the CFD software. By using the obtained experimental results, the author validated the numerical simulation model, and the simulation was carried out to get the thermal performance parameters under different conditions which the solar radiation was from300W/m2to700W/m2and the ambient temperature was from6℃to12℃were obtained by using the numerical simulation model According to the simulation results of performance parametres, such as the pressure loss of flow air, the temperature of collector plate’s surface, the outlet air temperature and the rise of air temperature, the thermal efficiency and the heat exchange effectiveness, the optimal operating flow of collector plate’s per unit area under corresponding conditions were obtained, which provided a reference for the selection of opertaing flow in the practical engineering, the design and economical operation of the solar air collector.更多还原