Experimental Investigation on Farmer-Friendly Hybrid Dryer for Indoor Drying of Mushroom

Abstract

This investigation deals with thermal performance evaluation, techno-economic analysis and quality analysis of dried mushroom flakes in a developed hybrid system using both solar and electrical energy. Hybrid dryers are efficient and economic means of continuous drying of agricultural products which require drying at temperature range of 45–60 °C without compromising in the quality of the final product. Heat storage capacity of water is higher than air, so hot water is directly circulated in the drying chamber through a heat exchanger to generate heat inside the drying chamber resulting in substantial saving of electricity. Mushrooms are considered for the investigation as they are highly perishable agricultural products having good off seasonal utilization. They are a source of powerful nutrients and a leading source of essential antioxidant which are relished for their characteristic aroma and flavour. Hence, drying is must for proper storage of mushrooms to increase its shelf life. Mushroom flakes were dried within 8 h from the moisture content of 82.0% (w.b.) to 10.67% (w.b.). For mushrooms, besides the investigation of the drying times and rates, the product rehydration capacity and quality are also evaluated.