一种真空管集热器的入射角修正系数获取方法

A METHOD TO OBTAIN INCIDENCE ANGLE MODIFIER OF EVACUATED TUBE COLLECTOR

提出了一种获得真空管集热器入射角修正系数的方法。该方法在不同入射角条件下,通过有效得热的实测和模拟结果比较修正TRNSYS自带的适用于平板集热器的二维入射角修正系数,最终得到适用于真空管集热器的入射角修正系数。实测验证表明该方法可行,具体的修正系数至少适用于北京地区秋分到第二年春分的真空管集热器热性能预测,但在其它季节和地区,具体的入射角修正系数表是否有变化尚需实测验证。

A method to obtain incidence angle modifier of evacuated tube collector was put forward in this paper. By comparing the measured effective heat gain with the simulated result, and modifying two dimensional incidence angle modifier in TRNSYS, which is suitable for flat collector, incidence angle modifier for evacuated tube collector then was obtained. The test showed that the method is feasible, the exact modifier can at least be applied to predict the thermal performance of evacuated tube collector in Beijing area from Autumn Equinox to next Spring Equinox. But for other seasons and areas, a further test is needed to see if there is change in modifier table.