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CPC在太阳能热利用中的应用 总被引:1,自引:0,他引:1
综述了CPC聚光器的光学原理、制作方法、优点和在太阳能领域的应用;分析了CPC由倒V型结构向W型结构发展的原因;阐述并提出了直通式CPC、热管式CPC、自聚光式CPC的结构和优点;设计了多种双层玻璃管式CPC结构。 相似文献
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我们研制了一种多功能的家用太阳能热利用装置,该装置采用高效率、低成本,长寿命的蜂窝太阳能集热器与适当设计的热水开水箱(兼蒸锅)构成。集热器能接收太阳直射辐射也能接收漫射辐射。整个系统结构简单,操作维护方便。兼具通常平板型热水器和CPC开水器的优点,又填补两者 相似文献
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基于CPC型集热器的发展现状,设计出新型CPC热管式集热器.介绍了该集热器的聚光面和接收器的结构设计计算过程,并对集热器进行了集热分析.采用MATLAB建模仿真技术对该集热器进行建模和动态仿真来预测该新型CPC热管式集热器的运行情况,得出新型CPC热管式集热器的有效输出能量、出口温度、瞬时集热效率的变化图.通过试验研究证实了新型CPC热管式集热器可以产生蒸汽,可用于制冷,尤其是热源品位要求较高的氨吸收式制冷,同时还可用于汽轮机发电和太阳能海水淡化等场合. 相似文献
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为研究复合抛物面聚光器(compound parabolic concentrator,CPC)在光伏/热(PV/T)太阳能系统中的应用特性,分析CPC-PV/T集热器内部的热传输机理,建立CPC-PV/T太阳能系统的光热、光电能量转换理论。并对系统的光热、光电转换特性进行研究,结果表明,CPC型聚光器在PV/T系统中的应用,一定程度上会导致系统光热转换性能的降低,但能有效提高系统光电转换效率。另外,设计无聚光PV/T太阳能系统样机和CPC型聚光PV/T太阳能系统样机,并对2种样机的光热、光电特性进行测试及对比分析。其中,CPC-PV/T样机的热效率为39.6%、输出电效率5.4%,无聚光PV/T样机热效率为44%、输出电效率仅为4.1%,实验结果与理论分析结果一致。 相似文献
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Fossil fuel based power generation is and will still be the back bone of our world economy, albeit such form of power generation significantly contributes to global CO2 emissions. Solar energy is a clean, environmental friendly energy source for power generation, however solar photovoltaic electricity generation is not practical for large commercial scales due to its cost and high-tech nature. Solar thermal is another way to use solar energy to generate power. Many attempts to establish solar (solo) thermal power stations have been practiced all over the world. Although there are some advantages in solo solar thermal power systems, the efficiencies and costs of these systems are not so attractive. Alternately by modifying, if possible, the existing coal-fired power stations to generate green sustainable power, a much more efficient means of power generation can be reached. This paper presents the concept of solar aided power generation in conventional coal-fired power stations, i.e., integrating solar (thermal) energy into conventional fossil fuelled power generation cycles (termed as solar aided thermal power). The solar aided power generation (SAPG) concept has technically been derived to use the strong points of the two technologies (traditional regenerative Rankine cycle with relatively higher efficiency and solar heating at relatively low temperature range). The SAPG does not only contribute to increase the efficiencies of the conventional power station and reduce its emission of the greenhouse gases, but also provides a better way to use solar heat to generate the power. This paper presents the advantages of the SAPG at conceptual level. 相似文献
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The specifics of a continuous hydrino reaction system design are presented. Heat from the hydrino reactions within individual cells provide both reactor power and the heat for regeneration of the reactants. These processes occur continuously and the power from each cell is constant. The conversion of thermal power to electrical power requires the use of a heat engine exploiting a cycle such as a Rankine, Brayton, Stirling, or steam-engine cycle. Due to the temperatures, economy goal, and efficiency, the Rankine cycle is the most practical and can produce electricity at 30–40% efficiency with a component capital cost of about $300 per kW electric. Conservatively, assuming a conversion efficiency of 25% the total cost with the addition of the boiler and chemical components is estimated at $1064 per kW electric. 相似文献
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It is well known that the price per unit of generated electrical energy decreases with increasing size of the generator, which implies longer transmission lines and hence larger transmission losses. Considering both these facts, the optimum size of a thermal power station has been obtained by using life-cycle costing analysis; the demand is proposed to be met by a base load generator and a peak load generator. The dependence of the investment ratio (the ratio of present worth of net income to the capital investment) on relevant parameters has been studied. It is seen that there exist optimum sizes of base load generator and peak load generator of a power station, for a given load density. The effect of electricity price, coal price and escalation rates on the optimum sizes has also been investigated. The analysis has been made for constant demand as well as for growing demand. The effect of the ratio of base load to peak load on the economics has also been investigated. The cost data from a recent study in India have been used. 相似文献
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The technology parameter which represents the ratio of fractional change of an investment to fractional change in cost of electrical energy has been computed for thermal power stations. The value lies below ten which signifies that the is good scope for additional investment (bigger power stations). 相似文献