At present, oil fuel for boiler is being sold much higher than the oil fuel sold through gasoline station. Above price of Solar listed at the gasoline station at Rp1,650 per liter is for public use and the same solar fuel for industry are being distributed through different channels by the government Pertamina at about Rp2,100-/per liter.(Solar=Diesel Oil)

Fuel Consumption ( 1 ton steam )  Q = 1000 Kg/hr       heat output  T = 179 deg.C       saturated steam  P = 10 Kg/cm2      steam pressure  Tf = 100 deg C.    feedwater temperature  hs = 663 Kcal/Kg   total heat of steam  hf = 65 Kcal/kg   heat from feedwater  Hv = 5700 Kcal/kg   Low calorie coal a.r.  Hv = 6200 Kcal/kg   High calorie coal a.r.  Eff= 0.8     Boiler efficiency  Fc = Heat output x (total heat - heat in water)         Eff x Fuel heating Value  Fc = Q x (hs-hf)         Eff x Hv  LOW CALORIE COAL CONSUMPTION  Fc = 1000 X (663 - 65)     =131.14 Kg         0.8 x 5700  HIGH CALORIE COAL CONSUMPTION  Fc = 1000 X (663 - 65)     =120.56 Kg         0.8 x 6200

Let us calculate how much is the cost of steam from various kind of fuels in this chart.

KIND OF FUEL			KCAL	UNIT	PRICE(RP)DELIVERED	COST/KCAL	CONSUMPTION per ton steam	COST OF STEAM Rp/ton of steam
SOLAR(DIESEL)			9,063	LITER	1700	0.18758	77.89 Liter	Rp128,519/ton
I.D.O.			9,270	LITER	1700	0.18339	76.15 Liter	Rp125,648/ton
RESIDUE OIL			9,766	LITER	1560	0.16598	72.77 Liter	Rp113,521/ton
SOLAR(for industry)			9,063	LITER	2100	0.231711	77.89 Liter	Rp163,569/ton
COAL HI-CALORIE 20-50 mm			6,200	KG	345	0.05565	120.56 Kg	Rp41,593/ton
COAL LOW-CALORIE 0-50 mm			5,700	KG	288	0.05052	131.14 Kg	Rp37,768/ton
COAL HI-CALORIE 0-20 mm			6,200	KG	275	0.04435	120.56 Kg	Rp33,154/ton

You can maximize your saving up to 74.2% by using FINE COAL