共查询到18条相似文献,搜索用时 46 毫秒
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利用太阳能制冷空调不外有两种方法,一是先实现光—电转换,再以电力推动常规的压缩式制冷机制冷;二是进行光—热转换,以热能制冷。前者系统比较简单,但以目前的价格计算,其造价约为后者的3—4倍。因此国内外的太阳能空调系统至今仍以第二种为主。太阳能光—热转换利用已经有了很大的发展,特别是在解决生活的需要方面,如生活热水、采暖、太阳房等。但这些应用在需求上其实与大自然的赐予并不完全一致:当天气越冷、人们越需要温暖的时候,太阳能量的提供往往不足。而太阳能空调的应用则正好与太阳能的供给大体上保持很好的一致性:… 相似文献
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太阳能溴化锂吸收式制冷技术的研究进展 总被引:1,自引:0,他引:1
介绍了太阳能澳化锂吸收式制冷循环的工作原理和系统构成,具体阐述了该制冷循环的几种典型结构,包括单效、双效、两级以及三效涣化锂吸收式制冷循环,分析了各种制冷循环的优缺点以及目前研究进展;进一步讨论了太阳能澳化锂吸收式制冷机组的性能特点受冷媒水出口温度、冷却水进口温度、加热蒸汽温度、污垢系数及不凝性气体等诸多因素的影响;提出了太阳能溴化锂吸收式制冷技术现存问题,最后指出,随着科学技术的发展和绿色建筑的兴起,太阳能溴化锂吸收式制冷将会有非常大的发展前景。 相似文献
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本文介绍了用于夏季室内空调的太阳能驱动溴化锂吸收式制冷装置的优化设计。分别就高、低两种驱动热水设计温度进行了优化计算,得出了装置的结构参数和各自的运行参数,编制的优化设计程序不仅可用于装置结构参数和运行参数的优化,还可用于预示不同驱动热水温度下装置的性能。 相似文献
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《Energy》1999,24(11):971-977
By employing the energetic optimization technique, the optimal performance of a focusing collector-driven, an irreversible Carnot cogeneration system for air conditioning and refrigeration is investigated. A minimum value for the total solar insolation needed to overcome internal irreversibilities for start-up of the system is defined and the effect of the collector design parameters on this value is investigated. 相似文献
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The relative advantages of a single-stage, lithium bromide-water absorption air conditioner heated from a flat-plate solar collector are compared theoretically to those for an ammonia-water system, and the lithium bromide system is selected as the preferred one. Double-stage absorption systems with their improved performance are described and are shown theoretically to require generator temperatures that are too great to make them attractive for use with flat-plate collectors. Dual, series-connected systems which require no cooling tower for heat rejection are shown by analysis to have a low coefficient of performance. Systems utilizing refrigerant storage and a heat rejection buffer between a cooling tower and the absorber and condenser are discussed along with the computer simulation describing them. They are shown to require smaller cooling towers than conventional units. Operation with an air heat exchanger rather than the cooling tower in such a system is shown to yield acceptable system performance with a small reduction in the fraction of the cooling load which can be met with solar energy. 相似文献
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A solar powered air conditioning system using liquid desiccant is proposed. A solar air heater containing a porous material is used for regeneration purpose in the proposed system. The honeycomb desiccant rotary wheel is constructed from iron wire and clothes layer impregnated with calcium chloride solution, in honeycomb form, is utilized for the regeneration and absorption processes. The effect of airflow rate and solar radiation intensity on the system regeneration and absorption processes are studied. The obtained results show that the system is highly effective in the regeneration process. An empirical equation to calculate the removed moisture as a function of air flow rate at solar noon is obtained. Also empirical equation for wheel effectiveness as a function of air flow rate for regeneration and absorption process was obtained. 相似文献
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太阳能在制冷空调中的应用及关键技术 总被引:4,自引:0,他引:4
太阳能制冷应用于制冷领域可谓是节能环保一举两得。文章较系统地介绍了几种主要的太阳能制冷技术的原理和特点,并结合学校的一些研究成果,提出了太阳能制冷技术研究状况和发展所面临的问题。 相似文献