泡沫金属平板式太阳能集热器传热性能的研究
翟桂珍,陈威
摘要(Abstract):
主要研究泡沫金属对平板式太阳能集热器内传热情况的影响。考虑固体骨架与流体之间的传热温差,建立二维瞬态局部热不平衡的能量双方程模型,运用数值分析的方法求解控制方程。分别研究不同泡沫金属块高度与孔隙率对太阳能集热器排管内传热的影响,并分析不同情况下的Nu数、压降和综合节能性能。结果表明:与传统的平板式太阳能集热器相比,在集热器排管内填充泡沫金属能显著增强管内传热;随着泡沫金属块高度的增加和孔隙率的减小,Nu数增大的同时压降也随之增大。在应用中,以节能性能因子对泡沫金属结构进行优化。
关键词(KeyWords): 平板式太阳能集热器;泡沫金属;数值模拟;泡沫金属高度;孔隙率
基金项目(Foundation): 上海市教委创新科研课题(14ZZ142);; 交通部应用基础项目(2013319810150)资助
作者(Author): 翟桂珍,陈威
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