针对日光温室供能用复合抛物面聚光装置（CPC）在非供能期间存在的接收体“过热”问题,设计一种新型复合抛物面聚光光热光电装置,通过在复合抛物面聚光装置（CPC）腔体内安装光伏组件,利用其对不同入射偏角下太阳光线的拦截功能,可减少向接收体汇聚的入射光线,达到缓减“过热”的设计要求。首先,利用TracePro仿真装置在不同入射偏角条件下的光线传输和汇聚轨迹,计算装置光学性能参数的变化趋势,并搭建复合抛物面聚光光热光电装置防“过热”性能测试实验台,对比研究装置的防“过热”性能。结果表明,装置的光学性能参数,均呈先减小后增加的变化趋势,且与同规格CPC相比,装置的光线接收率与聚光效率最大可降低26.4%和25.3%装置接收体表面最大能流密度为 9276.1 W/m2,相较于同规格CPC下降25.6%;在晴好天气条件下,装置接收体翅片温度在正午时达到最高,其中R1~R6号翅片最高温度分别为102.2、92.2、91.7、92.7、98.6 和100.3 ℃,分别比同规格CPC对应的翅片温度降低15.7、21.2、23.4、13.8、19.9和14.6 ℃;装置中Ⅰ号和Ⅱ号光伏组件最大输出功率分别为4.8 和3.8 W;经济性分析表明,该装置集成的供能系统为日光温室供热的静态投资回收期约为2 a。
Abstract
Aiming at the receiver overheating of the compound parabolic concentrator (CPC) for solar greenhouse heating during nonoperating periods, this study proposes a novel compound parabolic concentrator photovoltaic-thermal device, with PV modules installed inside the CPC cavity. By intercepting incident solar radiation at different incident angles, these PV modules reduce the amount of radiation concentrated on the receiver and thus mitigate the overheating risk. First, TracePro is used to simulate rays’ propagation and focusing paths of the device at different incident angles, and quantify the changing trends of its optical characteristic parameters. Based on these results, an experimental platform was established to evaluate the anti-overheating performance of the compound parabolic concentrator photovoltaic-thermal device and to compare its overheating prevention effect with that of a standard CPC. The results show that, optical parameters of the device decrease initially and rise subsequently. Compared with the standard CPC, the maximum reductions in the light acceptance rate and concentration efficiency of the device are 26.4% and 25.3%, respectively. The maximum energy flux density on the receiver surface is 9276.1 W/m2, which is 25.6% lower than that of the standard CPC. Under clear-sky conditions, the receiver fin temperature reaches a peak at noon. The maximum temperatures of fins R1 to R6 are 102.2, 92.2, 91.7, 92.7, 98.6, and 100.3 ℃, respectively. These values are 15.7, 21.1, 23.4, 13.8, 19.9, and 14.6 ℃ lower than those of the corresponding fins in the standard CPC. In addition, the maximum output power of PV module Ⅰ and PV module Ⅱ are 4.8 and 3.8 W, respectively. Economic analysis further indicates that the static investment payback period of a solar greenhouse heating system integrated with this device is approximately 2 years.
关键词
太阳能 /
日光温室 /
光热光电 /
复合抛物面 /
过热 /
光线接收率 /
能流密度
Key words
solar energy /
greenhouses /
photovoltaic-thermal /
compound parabolic concentrator /
overheating /
light acceptance rate /
energy flux density
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基金
国家自然科学基金（52466005）; 内蒙古自治区高校创新研究团队（NMGIRT2404）; 内蒙古自治区直属高校基本科研业务费研究生提升基本科研能力项目（ZTY2025004）; 内蒙古自治区“草原英才”滚动支持项目
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