With the
Medium Combustion Plant Directive (MCPD) now European law, Kevin Houlden,
Industrial and Commercial Specialist at Calor, advises on the steps that
operators can take to upgrade their existing boiler plant.
The MCPD
became European law on 19th December
2017, setting emissions limit values (ELVs) to reduce levels of harmful sulphur
dioxide (SO2) nitrogen oxides (NOX) and particulates in exhaust gases from all
combustion plant rated between 1 MW and 50 MW thermal input.
All new
plants that are first operated after 20 December 2018 must be registered with
the Competent Authority and comply with new ELVs from that date.
However,
currently only five of the 43 Air Quality Zones in the UK meet the requirements
for NOx emissions levels laid out in the directive, with slow progress forecast
over the next twenty years. The MCPD rules also allow the Competent Authority
to change these limits because of poor local air quality should they choose to
do so, meaning the finished regulation in the UK is still to be determined,
particularly in relation to further restricting emissions in areas that do not
meet certain air quality requirements (Directive 2008/50/EC).
For
existing heavy fuel oil-fired boilers in particular, it is clear that this fuel
source cannot meet future ELVs. As a result, operators considering upgrading or
switching their boiler plant in order to ensure compliance with the MCPD need
to consider carefully the long-term implications if these ELVs are reduced even
further in the future.
The change
is expected to affect around 150,000 medium combustion plants across Europe, of
which 17,000 are located in the UK, using systems such as boilers, turbines and
electricity generators.
In
addition, there are around 250,000 businesses located off the mains gas network
in the UK. This means that there are a significant number of operators who will
face the additional challenge of choosing the cleanest, most
economically-viable energy solution when their boiler needs replacing.
The ELVs set in the MCPD will have to be applied from
20 December 2018 for new plants and by 2025 or 2030 for existing plants,
depending on their size. With the average lifespan of a commercial
boiler between 10-15 years, it pays to think carefully now about new capital
equipment investment, to ensure that any boiler plant specified will be capable
of meeting the new standard.
Unfortunately,
heavy-fuel oil installations will not meet the new ELVs for SO2 or particulates without abatement. This may
make some operators more cautious about investing in oil-fired technologies.
Switching
to liquefied natural gas (LNG) or liquefied petroleum gas (LPG) can enable
operators to ensure their installation meets the demands of the MCPD. Both
fuels already meet standards for SO2
and NOX and particulate emissions as
well as offering reduced CO2 output,
with margin to handle some tightening of ELVs in the future.
Burning
gas emits less CO2 in comparison to
some oil types, with LNG being the cleanest burning of all fossil fuels
available off-grid, offering a further step change in carbon reductions.
These
clean burning properties also enable improved boiler efficiencies, which can
exceed 90 per cent as well as reduced maintenance, both of which contribute to
long term reduction in operational costs.
One
success story is C&D Foods, a premium dry pet food manufacturer, which has
saved in excess of £50,000 and more than halved its CO2 emissions since converting its boiler fuel from oil to LPG from
Calor.
LNG and
LPG offer a cost-effective energy supply with cleaner-burning, lower carbon
outputs to oil. With a mature market of boiler and burner technologies readily
available, the fuels are ready and able to meet the challenging emissions
limits of the MCPD – if and when they change in the future.
