槽式太阳能腔体式集热管热性能研究

摘要

详细分析了椭圆形腔体式集热管在过冷区和过热区中的温度分布规律.结果表明该椭圆形腔体式集热管有两个温度极值点.在过冷区,当腔体长轴为b=63mm时,最高温度最大,出现在集热管的-35 mm处;在长轴为b=67mm时,最高温度最小,出现在-9mm处.在过热区最小温升出现在集热管-13.88mm处.该研究可为腔体式集热管设计、试验和应用提供理论参考.%It analyzes a elliptic cavity collector and its temperature distribution of absorber tube in liquid phase and vapor phase.Results show that the elliptic cavity has two temperature extreme points,when b =63mm in the liquid phase,the highest temperature appears in the-35mm of the collector;when b =67mm,the highest temperature appears in the-9mm of the collector.The smallest rise of the temperature appears in the -13.88mm.This research provides the reference to design and build the test bench.