共查询到11条相似文献,搜索用时 56 毫秒
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大力开发和应用太阳能,是当今许多国家极为关注的课题,节能技术的研究也是我国能源政策的重要组成部分。利用太阳能不仅可以在节能方面有很大益处,而且在减轻环境污染方面也很有意义。本文主要就太阳能烟囱发电技术的产生背景,研究现状和发展,太阳能烟囱发电技术原理,太阳能烟囱发电技术的特点进行介绍。并对太阳能烟囱发电技术进行设计及相应的数据分析。 相似文献
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A large number of researchers have paid great attention to solar chimney (SC) power generating technology, but only a few have studied the chimney configuration. Taking a 10 MW SC system as an example, the physical and mathematical models illustrating the fluid flow, heat transfer and output power features of the system are established. Based on constraints such as equal chimney bottom section area or equal chimney surface area, the impact of several sizes of three different chimney configurations upon the chimney outlet air temperature and velocity, system output power and efficiency is analyzed and the influence of the height‐to‐diameter ratio (H/D) of the cylindrical chimney on system performance is studied as well. After a comprehensive analysis of system output power and efficiency, it is proved by the numerical simulation that the cylindrical chimney would be the best choice among the three basic configurations, whose optimum H/D value ranges from 6 to 8. Copyright © 2011 John Wiley & Sons, Ltd. 相似文献
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Richard Petela 《Solar Energy》2009,83(1):94-107
A simplified model of solar chimney power plant (SCPP) consists of a heating air collector, turbine and chimney. Thermodynamic interpretation of processes occurring in these SCPP components is based on the derived energy and exergy balances. The examples of the energy and exergy flow diagrams show how the SCPP input of 36.81 MW energy of solar radiation, corresponding to 32.41 MW input of radiation exergy, is distributed between the SCPP components. Responsive trends to the varying input parameters are studied. Additionally, the concept of mechanical exergy (ezergy) of air is applied and it allowed for quantitative determination of the effect attributed to the terrestrial gravity field on the component processes of the SCPP. 相似文献
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文章以西班牙太阳能烟囱电站为原型,采用太阳射线追踪法加载太阳辐射,对太阳能烟囱电站和风力增压型太阳能烟囱电站进行三维数值模拟,探讨烟囱阴影下系统的流场特性和太阳入射角度对系统性能的影响。研究结果表明:烟囱阴影区蓄热层表面、集热棚表面温度突降,导致热气流与蓄热层表面、集热棚表面进行对流换热,造成热量损失;随着太阳入射角增加,系统轴功率和集热棚效率均明显下降;风力增压装置形成的出口负压可以削弱阴影所造成的气流掺混等不利影响,因而风力增压型太阳能烟囱电站涡轮机轴功率的变化幅度相对常规太阳能烟囱电站较为平缓。 相似文献