The temperature controlled indirect solar dryer
is designed in Quetta by using simple available stuffs in the market to dry the
agricultural products for its longer shelf life. The dryer consists of drying
cabinet, solar cell, electrical fan and collector. Inside the cabinet there are
four trays at equally distance from each other, each tray receive uniformly
heated air from the collector to dry the agricultural product. During the
drying process temperature and relative humidity inside the cabinet is measured
with help of digital hygrometer. Tomatoes, mint leaves, eggplant and onion were
dried in newly low cost designed dryer. The drying time, color and quality of
these products are compared with open sun drying. The result shows that the
product dried in the newly dryer is good in quality and dry faster than open
sun drying method. The drying occurs in falling rate period. Uniformity of the
dryer in each tray was also checked by placing vegitable slices of same size
and weight in each tray, the drying time for each tray was same. By increasing
the size of vegitable slices increase the drying time, result also shows that
increasing in drying air temperature also increase the drying time.
Low cost dryer sawtooth wave absorber plate Uniform heated air dryer Tomatoes Mint leaves Eggplant Onion
Birincil Dil | İngilizce |
---|---|
Konular | Mühendislik |
Bölüm | Original Research Articles |
Yazarlar | |
Yayımlanma Tarihi | 30 Eylül 2018 |
Kabul Tarihi | 30 Eylül 2018 |
Yayımlandığı Sayı | Yıl 2018 Cilt: 1 Sayı: 1 |