現状は政府が設定した石油の価格は あくまでガソリンスタンドで販売する車両 用燃料で工業用ボイラー燃料はこの 政府発表の値段よりも高くなっております。 地域により差があるようですがボイラー用 SOLAR燃料は既に２０００ルピア・リッター を上回っているところが多くなっております。

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

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