# Multi-Sector Air Pollutants Regulations (SOR/2016-151)

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Regulations are current to 2020-05-17

## PART 1Boilers and Heaters (continued)

### Quantification (continued)

#### Type of Gas

Marginal note:Percentage of methane

**16**(1) The percentage of methane in the gaseous fossil fuel introduced into the combustion chamber of a boiler or heater, for a given hour, must be determined, by volume, as a weighted average by the formula[(CH

_{4 ng}× Q_{ng}) + (CH_{4 alt}× Q_{alt})] × 100/(Q_{ng}+ Q_{alt})where

- CH
_{4 ng} - is the concentration of methane, determined in accordance with subsection (2), in the natural gas introduced into the combustion chamber during the given hour, expressed as a decimal fraction;
- Q
_{ng} - is the quantity of the natural gas introduced into the combustion chamber during the given hour, as measured by a flow meter on the input, expressed in standard m
^{3}; - CH
_{4 alt} - is the concentration of methane, determined in accordance with subsection (2), in the alternative gas introduced into the combustion chamber during the given hour, expressed as a decimal fraction; and
- Q
_{alt} - is the quantity of the alternative gas introduced into the combustion chamber during the given hour, as measured by a flow meter on the input, expressed in standard m
^{3}.

- CH
Marginal note:Gas introduced into combustion chamber

(2) The concentration of methane in the gaseous fossil fuel introduced into the combustion chamber is

Marginal note:Fixed HHV of commercial grade natural gas

**17** If the concentration of methane in the commercial grade natural gas introduced into the combustion chamber is fixed as 95%, in accordance with subparagraph 16(2)(a)(ii), the higher heating value of the commercial grade natural gas must, for the purpose of paragraph 29(b), be fixed as 0.03793 in accordance with subparagraph (a)(ii) of the description of HHV_{i} in that paragraph.

#### Thermal Efficiency

Marginal note:Modern boiler

**18** The thermal efficiency of a modern boiler, for a given day, must be determined by the formula

100% – L_{dfg} – L_{w} – L_{rc} – L_{o}

where

- L
_{dfg} - is the percentage of loss of thermal efficiency due to the thermal energy contained in the boiler’s flue gas determined on a dry basis for an hour in the given day, determined in accordance with section 19;
- L
_{w} - is the percentage of loss of thermal efficiency due to the thermal energy contained in the water in the boiler’s flue gas for an hour in the given day, determined in accordance with section 20;
- L
_{rc} - is the percentage of loss of thermal efficiency due to radiation and to convection of the boiler’s surfaces for an hour in the given day, being
(a) for a watertube boiler, the percentage of loss of thermal efficiency that is

(i) set out in, as applicable, column 2, 3 or 4 of Schedule 4, if the boiler operates during that hour at, respectively, 100%, 80% or 60% of its rated capacity, for the rated capacity of the boiler set out in column 1 of that Schedule and for that percentage , or

(ii) interpolated on a linear basis from

(b) for a firetube boiler, 0.5%, and

(c) in any other case, 1%; and

- L
_{o} - is the percentage of loss of thermal efficiency due to other sources, which is deemed to be 0.1%.

Marginal note:Determination of L_{dfg}

**19** L_{dfg} referred to in section 18 must be determined for an hour in the given day by the formula

1.005 × (T_{g} – T_{i})/HHV_{m} × M_{g} × 100

where

- T
_{g} - is the average temperature, expressed in °C, of the flue gas, as measured in the stack, during that hour;
- T
_{i} - is the average temperature , expressed in °C, of the air introduced into the combustion chamber during that hour;
- HHV
_{m} - is the higher heating value of the fuel combusted during that hour, expressed on a mass basis in kJ/kg, being
- M
_{g} - is the average ratio of the mass of the flue gas to the mass of the fuel combusted, expressed in kg/kg, during that hour, determined by the formula
0.962 × [1 + %O

_{2}/(20.9 – %O_{2})] × M_{s}where

- %O
_{2} - is the percentage of oxygen, determined by volume on a dry basis, in the flue gas, determined in accordance with EPA Method 3A or ASTM D6522-11,
- M
_{s} - is the ratio of the stoichiometric mass of the flue gas to the mass of the fuel combusted, expressed in kg/kg, being
(a) for commercial grade natural gas,

(b) in any other case, the ratio determined by the formula:

12.492C + 26.296H + N + 5.305S – 3.313O

where the concentration of each of the following constituents of the fuel combusted is determined in accordance with subsections 23(1) and (2) and

- C
- is the concentration of carbon in the fuel combusted, expressed in kg of carbon per kg of that fuel,
- H
- is the concentration of hydrogen in the fuel combusted, expressed in kg of hydrogen per kg of that fuel,
- N
- is the concentration of nitrogen in the fuel combusted, expressed in kg of nitrogen per kg of that fuel,
- S
- is the concentration of sulphur in the fuel combusted, expressed in kg of sulphur per kg of that fuel, and
- O
- is the concentration of oxygen in the fuel combusted, expressed in kg of oxygen per kg of that fuel.

- %O

Marginal note:Determination of L_{w}

**20** L_{w} referred to in section 18 must be determined for an hour of the given day by the formula

8.94H × [2450 + 1.989(T_{g} – T_{i})]/HHV_{m} × 100

where

- H
- is the concentration of hydrogen in the fuel combusted during that hour, expressed in kg of hydrogen per kg of that fuel, being
- T
_{g} - is the average temperature, expressed in °C, of the flue gas, as measured in the stack during that hour;
- T
_{i} - is the average temperature, expressed in °C, of the air introduced into the combustion chamber during that hour; and
- HHV
_{m} - is the higher heating value of the fuel combusted during that hour, expressed on a mass basis in kJ/kg, being

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