摘要
提出一种冲缝型吸热板结构,并对采用该结构的普通玻璃和真空玻璃盖板式冲缝型空气集热器的热性能进行研究。建立两种集热器的数学模型,并在实验的基础上,以空气出口温度和热效率作为评价指标,模拟研究不同参数对集热器热性能的影响。结果表明,在该文参数范围内,两种集热器的空气出口温度和热效率均随冲缝当量直径和室外风速增大而减小,随平均冲缝间距和环境温度增大而增大;空气出口温度随集热器送风量增大而减小,随空气进口温度升高而增大;热效率随集热器送风量增大而增大,随空气进口温度升高而减小;受真空玻璃透射率较低的影响,在室外环境条件良好时,真空玻璃盖板式集热器的热性能低于普通玻璃盖板式集热器。
An absorber with slit-like perforation was proposed. It was used in two transpired air collectors respectively with common cover glasses and vacuum cover glasses. After verifying mathematical model of the two collectors by experiment,the outlet air temperature and thermal efficiency as target function was used to study their thermal performance. Simulated results showed that outlet air temperature and thermal efficiency of the two collectors decrease with perforation equivalent diameter and outdoor velocity,and increase with average perforation pitch and ambient temperature. Outlet air temperature of the two collectors decreases with increasing air flow and increases with increasing inlet air temperature. Thermal efficiency of the two collectors increases with increasing air flow and decreased with increasing inlet air temperature. Meanwhile, in good environmental conditions, thermal performance of collector with vacuum cover glasses was lower than that of collector with common cover glasses. It was because of lower transmittance of vacuum glasses.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2014年第5期779-787,共9页
Acta Energiae Solaris Sinica
基金
天津市科技支撑计划重点项目(13ZCZDNC01400)
国家星火计划(2013GA610005)
关键词
冲缝型吸热板
空气集热器
真空玻璃盖板
热效率
absorber with slit-like perforation
air collecfor
vacuum cover glasses
thermal efficiency
