Products
Mini Infrared Asphalt Patchers
By Heat Design Equipment
Operation Costs
HDE TECHNICAL TIP 2: Operating cost P200
Because of the particular design of the HDE heater, the actual gas usage can be predicted accurately, since the design follows standard gas formulae. Field tests have shown that the actual gas usage is within 6% of theoretical. WE can estimate the fuel cost of each configuration of HDE infrared heaters. For example HDE P200 patcher
HDE HEATER OPERATING COST
The BTU input rating of an HDE infrared heater is based on the pressure the system works under, and the size of the orifice that allows the pressurized gas into the heating chamber.
Although the HDE heater can work at varying pressures the standard operating pressure recommended is 35 psi. The orifice size is .039 inches in diameter. Standard gas tables show that the gas inflow at this setting is 39.5 cubic feet per hour.
At 60 degrees F there are 2516 BTU of heat per cubic foot of propane.
The rating of the heater is then 39.5 x 2516= 99,382 BTU/ hr
HEATER PROPANE USE HDE P200
The heater has 2 heaters, so the gas input is approximately 200,000 BTU
Each Imperial gallon of propane gas yields 110,000 BTU
The gas usage per hour would 200,000/110,000= 1.81 gallons
There are 4.546 litres/ gallons of gas
The gas usage per hour would be 1.81 X 4.546 = 8.22 litres
Assuming a cost of 40 cents Canadian per litre
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