ชื่อประเทศ
The dryer can also be used with an auxiliary heat source with the
dryer when adverse weather conditions exist. Using the water tank
with the solar dryer, about 15 C can be stored in water during the
time of sun-shine. During the night, the system transfers the stored
heat from the water to the air inside the solar dryer and controls
the air temperature through the drying process at night. The colour,
aroma and texture of the solar dried products were better than
the sun drying products.