Agricultural solar air collector made from low- cost plastic packing film

摘要

Special attention has been paid to build a simple solar air heater from cheap plastic wrapping film with air bubbles, for use in drying operations on a farm (grain, fruit, fish, etc.). The model used was a single-sheet cylindrical collector and, after it had gained some heat, another layer of the plastic wrapping films with air bubbles was added in a later stage to decrease convection heat losses to the surroundings.