In this paper, a solar air heater were tested based on ASHRAE Standard 93-2010, The test results show that, the
resistance of the improved solar heater’s decrease to 400 Pa. Then, a solar drying system was designed and
experimental investigated base on the new designed solar air heater, the test results showed that there are more than 320kg wet wool and carpet could be dried in 7.5 hours in Lhasa Tibet, when the average intensity of solar irradiation
got to 800 W/m2
, and the average thermal efficiency of the solar air field can reach to 48%.