折面形抛物柱聚光器的设计与分析

设计了针对圆管吸收器的折面形抛物柱反射镜,太阳光按32′角度入射计算。计算了聚光器的焦距、吸收管径和反光镜尺寸等参数,研究了折面尺寸对聚光性能的影响,推导了不同折面尺寸所对应的吸收管径的大小以及在特定的相对口径比下的最大聚光比,得到了聚光比在7～10时为最佳结构的结论,为低成本折面形抛物柱管式吸收聚光器的设计提供了参考和依据。

基于吸热管反射成像法测量抛物槽式太阳能聚光器的面形误差

为提高抛物槽式太阳能聚光器的聚光效率,需要对聚光器的整体面形进行检测和调整。提出采用吸热管反射成像法检测槽式聚光器各子镜的安装位置及倾斜角度,进而获得聚光器的整体面形信息。通过测量相机与被测聚光器的相对位置,可计算吸热管在待检测子镜中的成像位置及形状,并推导了吸热管在聚光器中的理论成像位置计算公式。进行了吸热管反射成像法检测槽式聚光器面形的实验。通过调整聚光器子镜的安装位置和倾斜角度,使吸热管在子镜中的实际成像位置与理论位置重合,验证了检测方法的正确性和可行性。

Optical Design of a Solar Parabolic Concentrating Collector Based on Trapezoidal Reflective Petals

In this paper, detailed optical of the solar parabolic dish concentrator is presented. The system has diameter D = 2,800 mm and focal length f = 1,400 mm. The efficient conversion of solar radiation in heat at these temperature levels requires a use of concentrating solar collectors. In this paper, detailed optical design of the solar parabolic dish concentrator is presented. The parabolic dish of the solar system consists from 12 curvilinear trapezoidal reflective petals. This paper presents optical simulations of the parabolic solar concentrator unit using the ray-tracing software TracePro. The total flux on receiver and the distribution of irradiance for absorbed flux on center and periphery receiver are given. The total flux at the focal region is 4,031.3 W. The goal of this paper is to present optical design of a low-tech solar concentrator, that can be used as a potentially low-cost tool for laboratory-scale research on the medium-temperature thermal processes, cooling, industrial processes, solar cooking and polygeneration systems, etc.