第三種太陽(yáng)能灶是拋物面式爐具。這種爐具有著圓形的墻壁，直接將太陽(yáng)光聚焦到爐具的底部。
摘要：Sacramento，Kenya
The food is inside a separate container of plastic or glass that traps heat energy. People can build panel cookers quickly and with very few supplies. They do not cost much. In Kenya, for example, panel cookers are being manufactured for just $2. The third kind of solar oven is a parabolic cooker. …
把食物放入一個(gè)單獨(dú)的、收集熱量的塑料或玻璃容器內(nèi)。人們可以用很少的材料快速做成板式爐具，而且花費(fèi)也不多。比如在肯尼亞，制造板式爐具只需2美元。 第三種太陽(yáng)能灶是拋物面式爐具。這種爐具有著圓形的墻壁，直接將太陽(yáng)光聚焦到爐具的底部。在拋物面式爐具上煮食速度很快，然而，這些炊具很難制造。它們必須經(jīng)常校準(zhǔn)以…