论文部分内容阅读
一、截光曲面的选择截光面又称采光面,它是太阳灶获得太阳辐射能的接收面。截光面尺寸选取是否合理与太阳灶的效率、功率有密切的关系。早期制作的太阳灶大都应用旋转抛物面聚光原理,设计成对称的灶面,这种灶在太阳高度角较大时,能获得较好的聚光效果,但当太阳高度角较小时,则有相当部分反射光线不能汇聚到锅底。国内自1975年起对截光曲面的选取进行了研究,曾陆续提出一些设计理论和方法,如偏轴设计,正抛轴外聚光、有效面分析图表等。这些理论和方法对提高聚
First, the choice of cut-off surface Cut-off surface, also known as lighting surface, it is the solar kitchen solar radiation to receive the surface. Cutter size selection is reasonable and solar cookers efficiency, power is closely related. Most of the early production of solar cookers using the principle of rotating parabolic concentrator, designed as a symmetrical cooktop, this stove at a high solar angle, get better condenser effect, but when the solar elevation angle is small, then there are A considerable part of the reflected light can not converge to the bottom of the pot. Domestic research on the selection of cut-off surfaces has been carried out since 1975, and some design theories and methods have been put forward one after another, such as off-axis design, outer-throwing plus-throwing and effective surface analysis charts. These theories and methods to improve poly