การประยุกต์ใช้วัสดุพรุนในเทคโนโลยีการอบแห้ง

Abstract

The objective of this study is to apply the advantages of porous media for drying technology. In this study, the porous oven was designed and manufactured to use for drying and cooking process. The radiation energy will be enhanced by porous media in the oven without flue gas touching on the product. The rice husk of 0.5 kg is used as fuel in this test.  Effect of porous media installation inside the oven on heat exchanger phenomena along the oven were examined in this preliminary test.  It was found that the temperature distribution inside the drying chamber in case of installing porous media inside the oven was more quite uniform than that in case of without porous media inside the oven. Although, the maximum average temperature inside the drying chamber in case of installing porous media was less than that in case of not installing porous media. The oven efficiency and the specific moisture extraction rate (SMER) in case of installing porous media and not installing porous media is 57.32 % and 52.42 % and 0.243 kg/MJ and 0.222 kg/MJ, significantly. The payback period is 0.72 year or 8 months with 20 days and 1.09 years or 13 months with 3 days for installing porous media and not installing porous media, significantly.