Which one of the oil and gas steam generators costs less to use?

Fuel gas steam generator can be divided into three kinds of fuel for combustion use, you can use liquefied petroleum gas, natural gas, diesel fuel, of which the cost of natural gas will be a little lower, if the local natural gas 1 cubic meter an hour 4 yuan or so, a ton of oil-fired gas steam generator to produce 1 ton of steam needs 70 cubic meters of natural gas, that is to say, every hour of natural gas operating costs to produce a ton of steam probably need 280 Money; a ton of oil-fueled gas steam generator to produce 1 ton of steam requires liquefied petroleum gas 60 kg, according to the liquefied petroleum gas per kilogram of 6 yuan or so, the cost of a ton of steam in the 360 yuan or so; diesel fuel local prices are different, there are high and low, we calculate according to the middle of the price of oil-fueled gas steam generator to produce 1 ton of steam requires diesel fuel 66L, diesel fuel in the calculation of 6 yuan per liter or so, the cost of a ton of steam in the 400 dollars or so. Overall, the cost of natural gas is still relatively low.