玻璃孔板-多孔介质太阳能吸热器耦合传热特性研究  

COMBINED HEAT TRANSFER PERFORMANCES OF VOLUMETRIC SOLAR ABSORBER WITH QUARTZ GLASS PERFORATED PLATES

作　　者：戴贵龙 陈雪淇 王孝宇 Dai Guilong;Chen Xueqi;Wang Xiaoyu(Key Laboratory of New Energy and Energy-saving in Building,Fujian Province University,Fujian University of Technology,Fuzhou 350118,China)

机构地区：[1]福建理工大学建筑新能源与节能福建省高校重点实验室,福州350118

出　　处：《太阳能学报》2025年第1期704-709,共6页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(52176181,51806037)。

摘　　要：为降低多孔介质吸热器的红外辐射散热损失,设计一种石英玻璃孔板与多孔介质吸收系数阶梯增加双层吸热器。通过高温传热实验和耦合传热模型,对双层吸热器的聚集太阳光热转换特性进行研究。结果表明:由于石英玻璃孔板对多孔介质红外热辐射的回收,与单层多孔介质吸收器相比,双层吸热器热效率提高10%;受石英玻璃孔板太阳光低吸收和流体的射流作用,双层吸热器前端的石英玻璃孔板固体温度较空气流体的出口质量平均温度低近300 K,双层吸热器具有明显的容积吸热效应。瞬态传热计算结果表明,固体域升温过程大概持续20 min,而流体出口温度需50 min进入稳态。研究结论为高效率多孔介质吸热器的设计与技术发展提供参考依据。To minimize the re-radiation loss emitted from the solar receiver,a double-layer solar receiver that comprises quartz glass perforated plates and silicon carbide porous material was designed,manufactured,and experimentally tested.The proposed double-layer solar receiver can achieve an increasing absorption effect and improve thermal efficiency.Results show that the double-layer solar receiver offered 10%more efficiency than the single-layer porous solar receiver through the re-radiation recycling of the quartz glass perforated plates.The mass-weighted averaging outlet temperature of the working fluid approximates 300 K higher than the inlet wall temperature of the quartz glass perforated plates,leading to a significant volumetric effect.Moreover,the heating up time of the solid phase was about 20 minutes,while the working fluid needed 50 minutes to get the steady state.The conclusions support developing porous volumetric solar receivers in advanced power cycles.

关 键 词：太阳能 吸热器 热流密度 温度控制 热效率 

分 类 号：TK513.5[动力工程及工程热物理—热能工程]