Modeling the Feasibility of Using Solar Thermal Systems for Meeting the Heating Requirements at Corn Ethanol Production Facilities

Figure 10

Modeled cumulative cost savings and payback period for a flat plate array in Maricopa, AZ, with four different percent price increases for natural gas. Model input values: = 0.72, = 4.5 W/m²-°C, = 30°C, = $220/m².