| dc.description.abstract | Greenhouse Effect (GHE) Solar Dryer is a transparent wall structure, consists of absorber plate as solar heat collector, product holders (rack, tray or batch) and fans to discharge moisture from the drying product. GHE Solar dryer is one of the alternative for the farmer and merchants to improve the quality of dried products. Direct sun drying is still popular choice by farmers because it is cheap and simple. However, the method is greatly dependent on the existence of solar irradiation, and the product is contaminated very easily by pollution and dirt. The general constraint in designing artificial dryer is the problem of nonuniformity of final moisture content of product, especially for the rack type dryer. This is influenced by three important parameters of drying; temperature, relative humidity (RH) and airflow velocity of drying air. Therefore, in this study, such problem was approached by conducting flow simulation within the drying structure using computational fluid dynamics (CFD) to determine the proper position of drying air inlet and outlet, location and capacity of the heat exchanger unit as well as the position and capacity of the fan, and finally to obtain the uniformity of temperature, RH and airflow velocity. | en |
