Volume No. 7 Issue No.: 4 Page No.: 1399-1406 April-June 2013




Kumar Anil, Prakash Om*1, Kaviti Ajay and Tomar Abhishek2

1. Department of Energy, Maulana Azad National Institute of Technology, Bhopal (INDIA)
2. Department of Mechanical Engineering, Sagar Institute of Science and Technology, Bhopal (INDIA)


Received on : December 08, 2012




The use of solar energy in recent years had reached a remarkable edge. The continuous research for an alternative power source due to the perceived scarcity of fuel fossils is its driving force. It had become even more popular as the cost of fossil fuel continues to rise. Among all the renewable sources of energy available, solar energy is the most abundant one and is available in both direct as well as indirect forms. In this paper, the performance of active and passive greenhouse dryer is evaluated under no-load in monsoon season. The hourly data for the ambient temperature, relative humidity, wind velocity, radiation intensity were taken inside and outside the greenhouse dryers.  These data are used for the determination of the performance of  both type of greenhouse dryer.  From the experimental results, it can be concluded that drying conditions in passive mode of greenhouse drying are not favorable as relative humidity inside the dyer is high. However, drying in active mode is more encouraging as relative humidity can be maintained through exhaust fan. Monsoon seasons were more unpredictable and resulted in poorer drying conditions. 


Keywords : Solar energy, Solar dryer, Efficiency, Seasonal performance, Monsoon