- Notes:
- Values for base air ratio given in this table are for the air ratio measured at the boiler outlet at combustion at a fixed load under stable conditions after regular inspection.
- The load factor is that of the turbine for facilities installed to generate electricity, and the load rate of the boiler for other facilities.
- The air ratio is calculated by the following formula, and the result is rounded to one decimal place where the number of significant digits of the base air ratio extends to two decimal places, and to two decimal places where the number of significant digits extends to three decimal places.
- air ratio = 21 / (21 - oxygen concentration of exhaust gas (percent))
- The base air ratio for solid fuel fixed-bed boilers fueled by powdered coal shall be 1.15-1.3 for electricity supply business, and 1.2-1.3 for other provided that such facilities have an evaporation capacity of from 30 tons per hour or from 10 tons to under 30 tons per hour.
- For multifuel boilers combusting multiple types of fuel, the base air ratio for the fuel with the highest fuel ratio, based on heat value; the same shall apply hereafter.
- Values for base air ratio given in the table shall not apply to the air ratios of the following boilers:
- (1)Small boilers provided for in Article 1.4 of the Occupational Safety and Health Law Enforcement Ordinance
- (2)Boilers modified after installation for fuel conversion
- (3)Multifuel boilers combusting wood waste, tree bark, sludge, and other industrial waste with fuel
- (4)Boilers combusting black liquor
- (5)Boilers combusting waste tires
- (6)Single-fuel boilers fueled by byproduct gas with a heat value of no more than 3,800 kJ per normal cubic meter
- (7)Boilers processing toxic gas
- (8)Boilers using waste heat
- (9)Boilers using a heat medium other than water
- (10)Boilers not in operation at regular inspection or otherwise not in regular operation, and boilers used for development, research, or trial production
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