【摘要】 以太阳模拟器为光源，对平面吸热板和半圆柱吸热板热管式真空集热管测定了玻璃罩管内吸热板表面各点随光线入射角变化的相对太阳辐照强度分布，给出了平面与半圆柱吸热板平均相对太阳辐照强度随人射角变化的规律及三维拟合公式，并对两种情况的实验结果进行了初步分析。结果表明，半圆柱吸热板的全天得热量大于平面吸热板。更多还原

【Abstract】 or heat-pipe evacuated collector tubes with a flat absorber and a semicylindric absorber, relative solar irradiance changing with incident angles on various points of absorbers have been measured respectively by using a solar simulator. This paper has given regular patterns of average relative solar irradiance changing with incident angles and a corresponding three-dimensional regressive formula for both flat and cylindric absorbers, and also has made a preliminary analysis on experimental results for above mentioned two cases. The result shows that the heat gained by the semicylindric absorber over a day is more than that by the flat absorber.更多还原