CAJ | 학술논문

真空管式太阳能集热器在日出后和日落前的一段时间存在各根真空管内管的相互遮阴现象，从而影响有效集热面积和集热量，该文建立了倾斜集热面上管间遮阴的数学模型和太阳辐射模型，进而计算得到了一日内遮阴面积百分比随时间的变化关系、一年内遮阴时长百分比随日期的变化关系、倾角及方位角对遮阴时长的影响、一日内被遮阴辐射量随时间的变化关系、一年内被遮阴辐射量百分比随日期的变化关系。模拟结果表明，管间遮阴对能量采集率的影响最大不超过3.5%，全年平均约为2%，因此工程计算中可以略去不计。
진공관식태양능집열기재일출후화일락전적일단시간존재각근진공관내관적상호차음현상，종이영향유효집열면적화집열량，해문건립료경사집열면상관간차음적수학모형화태양복사모형，진이계산득도료일일내차음면적백분비수시간적변화관계、일년내차음시장백분비수일기적변화관계、경각급방위각대차음시장적영향、일일내피차음복사량수시간적변화관계、일년내피차음복사량백분비수일기적변화관계。모의결과표명，관간차음대능량채집솔적영향최대불초과3.5%，전년평균약위2%，인차공정계산중가이략거불계。
There exists the inter-tube overshadow problem on the Vacuum tube solar thermo-collector around the sunrise and sunset. It may have influence on the effective collecting area and collected heat. In this paper, a mathematic model of inter-tube overshadow on a slope collecting surface,together with a solar radiation model, was established and used to calculate the shadow area proportion changing in a day with the time, the shadow period proportion in a year changing with the date, the influences of slope angle and the orientation angle on the shadow period, the shadowed solar radiation in a day changing with the time, and the proportion of the shadowed solar radiation in a year changing with the date. The result showed, due to the inter-tube overshadow, the collected thermo-energy can be reduced by 3.5% at most, or annual averaged by about 2%. In the common engineering calculations, the problem could be neglected.