ตู้อบแห้งแสงอาทิตย์ชนิดอากาศร้อนไหลลงแบบกะทัดรัด

Abstract

Abstract

The present paper presented the thermal performance of   a compact solar cabinet dryer based on downdraft design. To increase the thermal performance, the solar dryer is designed including with the special design of preheating of ambient air before flow through the solar collector house and flow arrangement of hot air based on hot air distribution technique to control flowing of hot air through out the solar collector house. The results showed that preheating of ambient air before passing through the solar collector house can boost the temperature up to 30 percent.  The hot air temperature passes through the solar drying house is higher than the ambient air around 37 percent. Moreover the results showed that with the special design of hot air distribution, the temperature within the solar dryer house at the position of five plates is no significant difference.