Government of Canada / Gouvernement du Canada
Symbol of the Government of Canada

Search

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

Regulations are current to 2020-10-21 and last amended on 2020-09-21. Previous Versions

PART 1Boilers and Heaters (continued)

Main Requirements (continued)

Marginal note:Exception — impossibility

  •  (1) The NOx emission intensity of a class 80 or class 70 boiler or heater that undergoes a major modification that involves the use of combustion modification techniques must, as of its recommissioning date following the major modification, not — for each hour during which at least 50% of the input energy in its combustion chamber results from the introduction of gaseous fossil fuel — exceed the limit of 50% of its classification NOx emission intensity, if

    • (a) before the major modification is carried out, a responsible person for the boiler or heater provides to the Minister

      • (i) the name of the manufacturer of the boiler or heater, along with its serial number, make and model and the information referred to in section 1 of Schedule 6,

      • (ii) documents, provided to the responsible person by a person who is independent of them, that establish that the NOx emission intensity of the boiler or heater could not be at most 26 g/GJ when it operates under

        • (A) any circumstances that include the use of combustion modification techniques, and

        • (B) the conditions set out in subsection 27(2),

      • (iii) a signed certificate, provided to the responsible person by another person who is independent of both the responsible person and the independent person referred to in subparagraph (ii), that indicates that that other person has reviewed the documents described in subparagraph (ii) and agrees that the documents establish that the NOx emission intensity of the boiler or heater could not be at most 26 g/GJ when it operates under the circumstances and conditions described in subparagraph (ii), and

      • (iv) documents that establish that each of the independent persons referred to in subparagraphs (ii) and (iii)

        • (A) is an engineer who is, under the laws of the province in which the boiler or heater is located, authorized to practise engineering in relation to combustion modification techniques, or

        • (B) has demonstrated knowledge of, and at least five years’ experience as the technical lead of projects that involved, the design of combustion modification techniques; and

    • (b) after that recommissioning date, the NOx emission intensity of the boiler or heater is more than 26 g/GJ.

  • Marginal note:Major modification before registration

    (2) The NOx emission intensity of a class 80 or class 70 boiler or heater referred to in clause 34(1)(b)(i)(B) that has undergone a major modification that involved the use of combustion modification techniques must, as of the day that is 12 months after the day on which these Regulations are registered, not — for each hour during which at least 50% of the input energy in its combustion chamber results from the introduction of gaseous fossil fuel — exceed the limit of 50% of its classification NOx emission intensity, if

    • (a) before that day, a responsible person for the boiler or heater provides the Minister with the information set out in subparagraphs (1)(a)(i) to (iv); and

    • (b) after the boiler’s or heater’s recommissioning date, the NOx emission intensity of the boiler or heater is more than 26 g/GJ.

  • Marginal note:Combustion modification techniques

    (3) For the purpose of this section, combustion modification techniques are techniques to reduce the formation of thermal NOx in the combustion chamber of a boiler or heater by modifying the combustion process. They include the use of low-NOx burners and of flue gas recirculation.

Quantification

Elements of Requirements

Marginal note:Input energy from gaseous fossil fuel

 The percentage of the input energy in a boiler’s or heater’s combustion chamber resulting from the introduction of gaseous fossil fuel, for a given hour while the boiler or heater is in a steady state, must be determined by the formula

(Ecng + Egff)/(Ecng + Egff + Eo + Es) × 100

where

Ecng
is the input energy resulting from the introduction of commercial grade natural gas for the given hour, determined by the formula

Qcng × HHVcng

where

Qcng
is the quantity of the commercial grade natural gas combusted during the given hour, as measured by a flow meter on the input, expressed in standard m3, and
HHVcng
is the higher heating value of the commercial grade natural gas combusted during the given hour, expressed in GJ/standard m3, being
  • (a) the higher heating value determined in accordance with any of the required HHV methods set out in section 22 that apply, or

  • (b) 0.03793;

Egff
is the input energy resulting from the introduction of gaseous fossil fuel, other than commercial grade natural gas, for the given hour, determined by the formula

Qgff × HHVgff

where

Qgff
is the quantity of the gaseous fossil fuel, other than commercial grade natural gas, combusted during the given hour, as measured by a flow meter on the input, expressed in standard m3, and
HHVgff
is the higher heating value of the gaseous fossil fuel, other than commercial grade natural gas, combusted during the given hour, expressed in GJ/standard m3, determined in accordance with any of the required HHV methods set out in section 22 that apply;
Eo
is the input energy resulting from the introduction of a fuel other than gaseous fossil fuel during the given hour, determined by the formula

Σi(Qi × HHVi)

where

Qi
is the quantity of the ith fuel other than gaseous fossil fuel combusted during the given hour as measured by a flow meter on the input, expressed in a given unit,
HHVi
is the higher heating value of the ith fuel other than gaseous fossil fuel combusted during the given hour, expressed in GJ/the given unit, being
  • (a) the higher heating value determined in accordance with any of the required HHV methods set out in section 22 that apply, or

  • (b) the default higher heating value set out in column 2 of the applicable table to Schedule 3 for the type of fuel set out in column 1 of that table, and

i
is the ith fuel other than gaseous fossil fuel combusted, where i goes from 1 to n and where n is the number of those fuels combusted; and
Es
is the input energy, expressed in GJ, that originates from a source other than the combustion of fuel in the boiler’s or heater’s combustion chamber during the given hour, determined in accordance with generally accepted engineering principles.

Type of Gas

Marginal note:Percentage of methane

  •  (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

    [(CH4 ng × Qng) + (CH4 alt × Qalt)] × 100/(Qng + Qalt)

    where

    CH4 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;
    Qng
    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 m3;
    CH4 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
    Qalt
    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 m3.
  • Marginal note:Gas introduced into combustion chamber

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

    • (a) for commercial grade natural gas, either

      • (i) to be determined in accordance with ASTM D1945-03 or ASTM D1946-90, or

      • (ii) fixed as 95%; and

    • (b) for any other gaseous fossil fuel, to be determined in accordance with ASTM D1945-03 or ASTM D1946-90, whichever applies.

Marginal note:Fixed HHV of commercial grade natural gas

 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 HHVi in that paragraph.

Thermal Efficiency

Marginal note:Modern boiler

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

100% – Ldfg – Lw – Lrc – Lo

where

Ldfg
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;
Lw
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;
Lrc
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

      • (A) the rated capacity of the boiler within the applicable range of rated capacities as between two consecutive rows of rated capacities set out in column 1 of Schedule 4, and

      • (B) the percentage of loss of thermal efficiency at which the boiler operates during that hour as set out in

        • (I) the range between the percentages set out in columns 2 and 3 of Schedule 4, if it operates between 100% and 80% of its rated capacity, or

        • (II) the range between percentages set out in columns 3 and 4 of that Schedule, if it operates between 80% and 60% of its rated capacity,

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

  • (c) in any other case, 1%; and

Lo
is the percentage of loss of thermal efficiency due to other sources, which is deemed to be 0.1%.
 
Date modified: