【作者】 陈志豪；

【导师】 李新国；

【作者基本信息】 天津大学 ， 热能工程， 2006， 硕士

【摘要】 针对目前我国能源短缺和环境问题,本文提出了利用太阳能和其他辅助能源,既能为家庭提供生活热水又能用于采暖的太阳能采暖/热水组合系统。并将太阳的辐射能分为高、中、低三个层次,辐射量高时太阳能直接供热,为中时将太阳能作为热泵的低温热源,采用热泵辅助,为低时采用电加热辅助,做到能量的梯级利用。对太阳能供暖/热水组合系统进行模拟,分析不同的集热器面积,供热/蓄热水箱体积,供暖面积下,系统的不同运行性能和耗能。分析各参数的取值对系统性能的影响。进行有生活热水负荷时水箱温度变化情况下的模拟,分析热水负荷对采暖稳定性的影响。根据模拟计算的结论,并结合天津地区的气候特点和用户使用情况,建立一套太阳能供暖/热水组合实验系统及数据采集系统。对组合系统的整体运行性能进行实验研究。得到冬季供暖时:系统水箱温度的变化;室内温度的变化;还有太阳能所提供的能量,辅助加热所消耗的能量及各自所占比例。由于太阳能能量密度低、昼夜及季节性规律变化,存在间隙性、不可靠性等问题,使它的应用受到很大的限制。针对以上问题,本文还对太阳能的热存储特性进行研究。太阳能热存储可扩大太阳能热利用的时间范围,提高太阳能利用效率。更多还原

【Abstract】 This paper introduced a solar combisystem providing space heating as well as domestic hot water for the inhabitants of the building. In order to know the running performance of solar combisystem, simulation and experiments were carried out.First, simulation on solar combisystem was carried out. The performances and energy consumption were analyzed under different conditions including different area of solar collector, different volume of water tank for heating or energy storage, and different room area etc. The influence of the domestic hot water load was also be considered, which made the water temperature in the tank decreased and led to not enough energy for space heating.Based on the result of simulation and weather condition in Tianjin, an experimental system was set up. And some data about system performance were acquired, such as the water temperature variation in tank, the indoor temperature, the solar energy and auxiliary energy consumption. The feasibility of solar combisystem in Tianjin was analyzed.Because the radiation flux of solar energy is quite low, different between day and night, summer and winter, the uncontinuity is a big problem in the utilization of solar energy. In order to solve this problem, heat storage in solar heating system was investigated. The storage of solar energy made it possible to use solar energy after the sunset. So more solar energy could be used in the system and the performance was improved.更多还原