摘要
提出了一种高效储能平板集热器模型。该平板集热器中采用相变材料作为储能介质,不需储能水箱及防冻保护装置,因此节约了空间和费用。建立了太阳平板集热器内相变材料(石蜡)二维相变传热及自然对流模型,运用显热容法模拟了平板集热器内泡沫铝中石蜡相变融解传热过程。与平板集热器内填充纯相变石蜡的融解传热过程进行比较发现,泡沫铝可极大地提高相变石蜡的相变传热性能。计算结果为高效储能型平板集热器的开发提供了理论指导。
A high efficiency solar flat-plate collector with energy storage was proposed. The collector has a phase change material （paraffin） integrated into it as the storage mechanism. The paraffin-integrated solar collector eliminates the need of conventional storage tanks and anti-freeze protection is not required in cold areas, thus saving cost and space. A two dimensional numerical model of phase change heat transfer and natural convection of phase change material integrated solar flat-plate collector was established in this paper. Apparent heat capacity method is used to simulate the melting heat transfer process of phase change paraffin with aluminum foams in flat-plate collector. The simulation results showed that the phase change heat transfer of paraffin with aluminum foams in flat-plate collector is greatly improved compared with that of paraffin without aluminum foams in flat-plate collector. The results are helpful for the design of high efficiency solar flat-plate collector with energy storage.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2009年第7期911-915,共5页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(No.50776015)
关键词
太阳能
传热
数值模拟
相变材料
泡沫铝
solar energy
heat transfer
numerical simulation
phase change material
aluminum foams
