摘要
太阳能热气流发电技术是目前国际太阳能研究领域的热点之一,但对带有蓄热层的太阳能热气流发电系统的研究并不多。该文分别建立了集热棚、烟囱和蓄热层的流动与传热数学模型。以西班牙试验电站模型为例进行的非稳态耦合数值计算结果表明:土壤具有较强的蓄热作用且能很好调整系统昼夜发电峰谷差;太阳辐射强度对系统散热损失的影响相当显著,太阳辐射越强,散热量越大;集热棚的顶棚是系统散热损失的主要部件,散热热流密度约为太阳辐射的10%。
The solar chimney power generation system is one of the hotspots in the world solar energy research at the current time, but there is few study on the solar chimney power plant systems coupled with energy storage layer. Different mathematical models of flow and heat transfer for the the collector, the chimney and the energy storage layer were developed. Unsteady conjugate numerical simulation results for the solar chimney prototype in Spain show that the soil has the effect of energy storage and can modulate the difference of output power of the solar chimney power plant system between day and night, and that the solar radiation intensity has a significant effect on the energy loss from the system which will increase with the increasing of the solar radiation, and that the canopy of the collector is the main part of energy loss through the system, with a heat-transfer rate per unit area about 10% the amount of the solar radiation.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2008年第5期90-95,共6页
Proceedings of the CSEE
基金
教育部重点研究基金项目(104127)
关键词
太阳能热气流发电系统
自然对流
蓄热层
集热棚
烟囱
solar chimney power plant system
natural convection
energy storage layer
collector
chimney
