【摘要】 建立了一种太阳能双吸收式热变换器的数学模型,研究了设计工况以及不同环境因素影响下的系统热力性能,分析了太阳辐射强度、环境温度、集热温度、吸收/蒸发温度和温升对系统热效率和制热功率的影响。研究结果表明:系统存在最佳的吸收/蒸发温度;辐射强度增加时系统性能明显提高,辐射强度从0.3 k W/m2变化到1.0k W/m2时,系统热效率提高了10.9%,制热功率增加了10.6倍;随环境温度或集热温度的升高,系统性能呈现了先升后降的趋势,在环境温度为26℃或集热温度为82℃时,系统性能分别达到最佳;最佳集热温度随着辐射强度的增大和环境温度的升高呈升高趋势。更多还原

【Abstract】 A mathematic model of a solar double absorption heat transformer is developed in this paper. Based on this model,the thermodynamic performance of the system has been studied under various conditions,including the solar radiation intensity,the ambient temperature,collector temperature, absorber/evaporator temperature and gross temperature lift. The results show that,first,the absorber/evaporator temperature has an optimal value when the system works in a certain condition. Second,the system performance improves with the rising of solar radiation intensity.When solar radiation intensity rises from 0.3 to 1.0 k W/m2, the system coefficient of performance improves by 0.109 and the heating capacity increases by 11.6 times. Third,with the ambient temperature or collector temperature increased,the system performance increases first and then drops. The optimal ambient temperature and collector temperature are 26 ℃ and 82 ℃ respectively.The best collector temperature increases with the increase of radiation intensity and ambient temperature.更多还原