考虑环境风时碟式太阳能热发电系统用腔式吸热器的热性能模拟  

THERMAL PERFORMANCE SIMULATION OF CAVITY RECEIVER FOR DISH CSP SYSTEMS CONSIDERING AMBIENT WIND

作　　者：王晓文 屠楠 方嘉宾 王驰宇 刘晓群 刘家琛 Wang Xiaowen;Tu Nan;Fang Jiabin;Wang Chiyu;Liu Xiaoqun;Liu Jiachen(School of Mechanical and Electrical Engineering,Xi’an Polytechnic University,Xi’an 710600,China;School of Chemical Engineering and Technology,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安工程大学机电工程学院,西安710600 [2]西安交通大学化学工程与技术学院,西安710049

出　　处：《太阳能》2023年第5期29-38,共10页Solar Energy

基　　金：陕西省秦创原“科学家+工程师”队伍建设项目(2022KXJ-179);西安市现代智能纺织装备重点实验室建设项目(2019220614SYS021CG043)。

摘　　要：吸热器是碟式太阳能热发电系统中集热系统的关键部件,为了探究环境因素对吸热器热性能的影响,利用光线追踪和数值计算的方法,在考虑环境风的情况下,对腔式吸热器进行了不同工况时的热性能模拟,讨论分析了太阳高度角、环境风风向、风速及传热工质进口状态对腔式吸热器热性能的影响。结果表明:太阳高度角越小,腔式吸热器对流热损失越大;随着环境风风向角的增大,无论风速如何,腔式吸热器的热损失都呈现先减小后增大的趋势,当风向角为135°时的热损失最小,风向角小于45°时的热损失较大;任何风向下,腔式吸热器的热损失都随着环境风风速的增大而增大,且在0°和45°风向角下,腔式吸热器对于风速变化较为敏感;传热工质进口流量的增加会提升腔式吸热器的热性能,进口温度的提高则会降低腔式吸热器的热性能,且对其影响的规律呈线性。The receiver is a key component of the heat collection system in the dish CSP system.In order to explore the impact of ambient factors on the thermal performance of receiver,this paper uses ray tracing and numerical calculation methods to simulate the thermal performance of the cavity receiver under different working conditions,considering ambient wind.The infiuences of solar elevation angle,ambient wind direction,wind speed and inlet state of heat transfer working fiuid on the thermal performance of the cavity receiver are discussed and analyzed.The results show that the smaller the solar elevation angle is,the greater the convective heat loss of the cavity receiver is.As the wind direction angle of the ambient wind increases,regardless of the wind speed,the heat loss of the cavity receiver shows a trend of flrst decreasing and then increasing.When the wind direction angle is 135°,the heat loss is the smallest,and when the wind direction angle is less than 45°,the heat loss is greater.Under any wind direction,the heat loss of the cavity receiver increases with the increase of the ambient wind speed,and the cavity receiver is more sensitive to changes in wind speed at 0° and 45° wind direction angles.An increase in the inlet fiowrate of the heat transfer working fiuid will improve the thermal performance of the cavity receiver,while an increase in the inlet temperature will reduce the thermal performance of the cavity receiver,and the law of its impact is linear.

关 键 词：太阳能热发电 碟式 腔式吸热器 螺旋盘管 环境风 传热特性 热性能 

分 类 号：TK513.3[动力工程及工程热物理—热能工程]