Regulation 7 Calculation of reckonable energy from combined heat and power stations : non-renewable fuelF4I1

Reckonable energy from a combined heat and power station F1which exclusively burns non-renewable fuel must be calculated by reference to the gross calorific value of the commodity burned to produce it.

Where part of the energy from a combined heat and power station is used in a place, the formulae set out in paragraphs (3) to (5) must apply for calculating the reckonable energy from the station in relation to that place.

The following formula applies in respect of electricity from the combined heat and power station which is used in that place—

where—

• RE is the reckonable energy in respect of electricity from the combined heat and power station which is used in that place;

• EC is the total energy content of the relevant commodities burned in the combined heat and power station calculated by reference to the gross calorific value of each commodity;

• EP is the quantity of electricity produced by the combined heat and power station which is used in that place;

• ET is the total quantity of electricity produced by the combined heat and power station which is used in that place and elsewhere; and

• HT is the total quantity of heat produced by the combined heat and power station which is used in that place and elsewhere.

If no electricity from the combined heat and power station is put into public supply, the following formula applies in respect of heat which is used in that place—

where—

• RHN is the reckonable energy in respect of heat from the combined heat and power station which is used in that place;

• EC is the total energy content of the relevant commodities burned in the combined heat and power station calculated by reference to the gross calorific value of each commodity;

• HP is the quantity of heat produced by the combined heat and power station which is used in that place;

• ET is the total quantity of electricity produced by the combined heat and power station which is used in that place and elsewhere; and

• HT is the total quantity of heat produced by the combined heat and power station which is used in that place and elsewhere.

If electricity from the combined heat and power station is put into public supply, the following formula applies in respect of heat which is used in that place—

F2RHS = [(EC x HP) / (2ET+HT)] - [((HP×ES)/HT) x (2.1 - (2EC / 2ET+HT))]

where—

• RHS is the reckonable energy in respect of heat from the combined heat and power station which is used in that place;

• EC is the total energy content of the relevant commodities burned in the combined heat and power station calculated by reference to the gross calorific value of each commodity;

• HP is the quantity of heat produced by the combined heat and power station which is used in that place;

• ES is the quantity of electricity produced by the combined heat and power station and put into public supply;

• ET is the total quantity of electricity produced by the combined heat and power station which is used in that place and elsewhere; and

• HT is the total quantity of heat produced by the combined heat and power station which is used in that place and elsewhere.

For the purposes of paragraphs (4) and (5), electricity from a combined heat and power station is put into public supply when it—

In paragraph (6)(b)—

• “CHP qualifying power output” has the meaning given by the relevant CHPQA standard;

• “CHPQA scheme”, in relation to a combined heat and power station, means the scheme in relation to which the station’s CHPQA certificate was issued;

• “CHPQA standard” means the Combined Heat and Power Quality Assurance Standard, Issue 7, promulgated by the Department for Energy Security and Net Zero, or its predecessor standards;

• “relevant CHPQA standard”, in relation to a combined heat and power station, means the CHPQA standard which is applicable to the station’s CHPQA scheme.