太阳能热气流发电系统透平发电及其能量损失  

Solar chimney power generation and its energy loss

作　　者：时笑阳[1] 明廷臻[1] 许国良[1] 胡立业[2] 李钰[1] 雷俊[1] 

机构地区：[1]华中科技大学能源与动力工程学院,武汉430074 [2]华东电力试验研究院有限公司,上海200437

出　　处：《华东电力》2009年第4期665-668,共4页East China Electric Power

基　　金：教育部重点研究基金(104127)

摘　　要：对包含蓄热层、透平的太阳能热气流发电系统的流动及传热及发电特性进行数值模拟,建立了太阳能热气流发电系统的流动与传热数学模型,分析了太阳辐射和透平压降对系统透平发电输出功率以及系统各部件能量损失的影响。计算结果表明:当太阳辐射为800 W/m2、透平压降为400 Pa时,系统输出功率可达160 kW;此外,大流量的流体流出烟囱成为造成系统能量损失的主要因素,集热棚顶棚也造成了大量的能量损失。Numerical simulations of flow, heat transfer, and power generation characteristics of the solar chimney generation system with the energy storage layer and the turbine were carried out, and the mathematical models of flow and heat transfer were built. The effects of solar radiation and pressure drop across the turbine on the output power and energy loss of the solar chimney generation system were analyzed. Numerical simulation results showed that when the solar radiation is 800 W/m^2 and the pressure drop across the turbine is 400 Pa, the output of the system can reach 160 kW; in addition, large mass flow rate of air flowing through the chimney may become the main factor of energy loss in the system, while the canopy of the collector may also cause large energy loss.

关 键 词：太阳能热气流发电系统 集热棚 蓄热层 烟囱 透平 

分 类 号：TK515[动力工程及工程热物理—热能工程]