The performance of forced convection greenhouse driers

Effect of mass on convective mass transfer coefficient during open sun and greenhouse drying of onion flakes

“…The dried crop can be stored for a considerable period without the fear of its deterioration. An advanced and alternative method to the traditional techniques is greenhouse drying (GHD), in which the product is placed in trays receiving solar radiation through the plastic cover, while moisture is removed by natural convection or forced air flow (Condorí & Luis, 1998). This double function, greenhouse and dryer, improves the rate of the initial investment (Condorí, Echazú , & Saravia, 2001), thus maintaining the good quality, increasing the storage capacity and reducing the wastage of the crop simultaneously (Tiwari, 2003).…”

Experimental investigation of forced convection and desiccant integrated solar dryer

“…The absence of control over drying temperature was acutely felt in open sun drying and the passive solar dryer, and then the later research tended to have a preference to the use of forced air circulation solar dryer. Several designs of forced convection solar dryers have been recently proposed for drying applications in developing countries and still a good deal of work is continuing in this direction [1][2][3][4][5][6][7]. Active solar dryers are designed incorporating external means like fans or blowers, for moving the solar energy in the form of heated air from the collector area to the drying beds.…”

A Review Paper on Solar Greenhouse Dryer

“…Results showed that double chamber greenhouse dryer is 87% more productive than single chamber for the same area. A new low cost design tunnel-type greenhouse dryer was constructed and tested [6].Wang et al presented experimental analysis of air speed distribution in a naturally ventilated greenhouse. The result showed due to 0.837 of the regression slope the calculated air speed was lower than measured value.…”