Benefits
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Solar drying systems are simple installations that can be easily retrofitted onto existing facilities and connected to existing air drying fans and air handling equipment. The payback for a solar drying system can be from 2-5 years. Costs range from $100-$250/m2 and can replace conventional wall or roof cladding. Solar drying reduces the risk of burning or food damage associated with the use of steam or burning fuels. Solar drying reduces the cost for fuel, reduces air pollution from burning fuels for drying and reduces the risk of ground pollution from fuel spills. They can be designed with photovoltaic systems to power electric fans to ensure operation when there is no grid electricity. Perforated-plate collectors are durable and have a lifespan over 20 years or more. Solar drying systems are virtually maintenance free, with regular maintenance requirements for the dryer fans. Using solar energy for crop drying is ideal for tea, coffee, fruit, beans, rice, spices, rubber, cocoa, and timber. http://www.canren.gc.ca/tech_appl/index.asp?CaID=5&PgID=302
Modified: 02-13-2008
