Division BAT 31 In order to increase the energy efficiency of HFO and/or gas oil combustion in reciprocating engines, BAT is to use an appropriate combination of the techniques given in BAT 12 and below.

United Kingdom

Technique	Description	Applicability
a.	Combined cycle	See description in Section 8.2	Generally applicable to new units operated ≥ 1 500 h/yr. Applicable to existing units within the constraints associated with the steam cycle design and the space availability. Not applicable to existing units operated < 1 500 h/yr

Technique

Description

Applicability

Combined cycle

See description in Section 8.2

Generally applicable to new units operated ≥ 1 500 h/yr.

Applicable to existing units within the constraints associated with the steam cycle design and the space availability.

Not applicable to existing units operated < 1 500 h/yr

Table 17

BAT-associated energy efficiency levels (BAT-AEELs) for the combustion of HFO and/or gas oil in reciprocating engines

Type of combustion unit	BAT-AEELs^f1
These BAT-AEELs do not apply to units operated < 1 500 h/yr.
Net electrical efficiency BAT-AEELs apply to CHP units whose design is oriented towards power generation, and to units generating only power.
These levels may be difficult to achieve in the case of engines fitted with energy-intensive secondary abatement techniques.
This level may be difficult to achieve in the case of engines using a radiator as a cooling system in dry, hot geographical locations.
	Net electrical efficiency (%)^f2
	New unit	Existing unit
HFO- and/or gas-oil-fired reciprocating engine — single cycle	41,5–44,5^f3	38,3–44,5
HFO- and/or gas-oil-fired reciprocating engine — combined cycle	> 48^f4	No BAT-AEEL

Annotations

f1: These BAT-AEELs do not apply to units operated < 1 500 h/yr.
f2: Net electrical efficiency BAT-AEELs apply to CHP units whose design is oriented towards power generation, and to units generating only power.
f3: These levels may be difficult to achieve in the case of engines fitted with energy-intensive secondary abatement techniques.
f4: This level may be difficult to achieve in the case of engines using a radiator as a cooling system in dry, hot geographical locations.