Heating - Solar air heater - Process - Crop drying

Template assignment

Base Case

• Natural gas fired system provides 6,200 m³/h of warm air at 40 °C
• Operates 24 hours/day, 7 days/week
• Seasonal efficiency is 70%
• Fuel rate is $0.40/m³

Proposed case

• Supplement during daytime with black transpired plate solar air heating system
• 144 m² on completely exposed vertical wall 20° east of south, high temperature rise application
• Assume a 0.70 wind sheltering coefficient (this could be done by multiplying each of the wind speed values by 0.70 in the climate data section of the Start worksheet)
• Cost is $20,000

Solution

The worked-out solution is the data file selected from within the RETScreen Project Database. The user automatically downloads the Project Database file while downloading the RETScreen software.