METI/ECCJ/AOTS Training Program

Indonesia

Effect of air preheating

If the heat contained in the exhaust gas is recovered by installing an air preheater, the temperature of the exhaust gas is lowered and the required fuel is reduced.

Criteria for exhaust gas temperature
(the Law Concerning Rational Use of Energy)

Criteria for boilers, Standard / target exhaust gas temperature

Type	Solid fuel		Liquid fuel	Gaseous fuel	Blast furnace gas, etc. Byproduct gas
Type	Fixed bed	Fluidized bed	Liquid fuel	Gaseous fuel	Blast furnace gas, etc. Byproduct gas
Electric utility service	-	-	145/135	110/110	200/190
Other service (Quantity of evaporation, tons/h)
30-	200/180	200/170	200/160	170/140	200/190
10-30	200/180	200/170	200/160	170/140
5-10	-	- /300	220/180	200/160
-5	-	- /320	250/200	220/180

Summary of note

After periodical inspection / 20°C at air feeder inlet, load factor at 100%, boiler outlet (heat recovery, flue gas treatment facility outlet)
Additional notes on pulverized coal combustion on fixed beds, use the fuel of higher mixing ratio in case of mixed fuel combustion, the target temperature for black liquor combustion being 180°C
Exemption:
Small boilers specified by the Labour and Health Law, boilers for which the fuel has been changed after installation, boilers burning an industrial waste with fuel
Boilers burning either black liquor or a poisonous gas for treatment purpose
Boilers for the purpose of using waste heat, using a heating medium, operating unsteadily, or for the purpose of development, research and test manufacturing

Criteria for factories
(the Law Concerning Rational Use of Energy)

The "criterion" should be observed to the extent economically and technically possible.
The "target" is the objective to pursue to achieve a reduction of energy unit consumption of 1 (one) percent per year (average).

Subjects of criteria (matters concerning standards)

Rationalization of fuel combustion.
Rationalization of heating, cooling and heat transfer.
Prevention of heat loss by radiation, conduction, etc.
Recovery of waste heat.
Rationalization of heat conversion into power, etc.
Prevention of electricity loss by resistance, etc.
Rationalization of conversion of electricity into power, heat, etc.

Quantitatively specified item of criteria (standard value, target value)

Air ratio for boilers
Air ratio for industrial furnaces
Outer wall temperature of industrial furnaces
Exhaust gas temperature for boilers
Waste heat recovery rate of industrial furnaces
Facility for which power factor should be improved
Target efficiency of high-efficient totally-enclosed electric motors (02 to 37kw)

Energy Conservation Improvements
Case Presentation Activity of ECCJ Participation on Case Presentation Activity Examples of Improvements Example 1:Power Reduction by Process Modification Example 2:Dust Removal System in Foundry Example 3:Manufacturing process improvement ---Eliminating heating process Small Group Improvement Approaches Case Presentation Meeting	---2 ---3 ---4 ---6 ---7 ---8 ---9

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