摘要
设计一种V型腔体式吸收器并将其应用在槽式太阳能集热器上用来产生中高温蒸汽。针对不同天气情况,对该系统产生蒸汽的效率进行实验研究和理论分析。结果表明晴朗天气条件下其系统效率为45.54%,平均瞬时效率为51.20%;多云天气条件下系统效率为32.25%,平均瞬时效率为48.97%。太阳能吸收器的热损失极大程度上决定着槽式蒸汽系统的热性能。分析V型腔体吸收器的热损,建立热损理论模型,理论计算结果与实验结果比较吻合,吸收器的主要热损来自辐射和对流热损。研究结果表明在0.15 MPa范围内V型腔体吸收器具有低热损和高效率。
A novel V-shaped cavity absorber was designed, which was used in the parabolic trough solar concentrator for generating high temperature steam. The efficiency of steam generation in the system was studied by experiment and theory at different weather conditions. The results show that the system efficiency is 45.54%, average transient efficiency is 51.20% in the sunny days and system efficiency is 32.25%, average transient efficiency is 48.97% in cloudy days. The thermal performance of the system for direct steam generation was determined by the heat loss, so the model of heat loss for the cavity absorber was established. It is found that the experiment results are consistent with theory calculation results. The heat losses of the radiation and the convection are the primary heat losses of the cavity absorber. The cavity absorber has low heat loss and high efficiency with the pressure intensity no more than 0.15 MPa.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2016年第6期1453-1460,共8页
Acta Energiae Solaris Sinica
基金
国家自然科学基金云南联合基金重点项目(U1137605)
国家国际科技合作项目(2011DFA60460)
关键词
槽式太阳能集热器
腔体吸收器
直接产生蒸汽
效率
热损失
parabolic trough solar concentrator
V-shaped cavity absorber
direct steam generation
efficiency
heat loss
