ANNUAL REPORT - HSE

TEŠ's Unit 6, 600 MW
Considering the requirements for increasing electricity
production due to ever greater consumption by end
users, the existing units of TEŠ will be upgraded by
additional production capacity – Unit 6 with projected
power of 600 MW. Parallel to that, older units whose
life span is nearing the end or which are technologically
obsolete will be replaced.
The importance of this project not only for the company
but also for Slovenia is demonstrated by the fact that
the project has been included in the National Development
Project Resolution 2007–2023. Using 4 million
tonnes of coal, TEŠ’s annual electricity output, which
now amounts to 3,600 GWh, would increase to 4,700
GWh if the project is implemented. The fact that the impact
on the environment is reduced thanks to the improved
efficiency of modern plants is also significant.
The construction of Unit 6 is planned to be financed
from several sources. In September 2007, an agreement
was signed with the EIB on a long-term loan of
€ 350 million.
The Official Journal of the EU in March 2008 published
a tender for supply of a flue gas desulphurisation device
and in September 2008 a tender for the supply
and installation of a 400 kV GIS switchyard. Tender
documentation for the supply of a cooling water system
is being prepared – construction and preparatory
work – for the purpose of setting up the cooling tower
and implementing other preparatory work. In June
2008 an agreement was signed on the supply of the
main technological equipment.
The project investor is TEŠ.
The main advantage of new technology is better utilisation
of the energy source. Unit 6 will instead of 4 use
3 million tonnes of lignite to produce the same quantity
of electricity as generated by Units 1–5 in 2007.
CO 2
emissions per unit of energy produced will be reduced
from 1.2 kg/kWh to 0.85 kg/kWh. Owing to even
more efficient flue gas desulphurisation devices, SO 2
emissions will be reduced by two thirds, amounting to
less than 2,000 tonnes per year, whereas NO x
emissions
will equal no more than one fourth of the current
figure, also not exceeding 2,000 tonnes per year.
The consumption of process water will almost halve,
resulting in smaller fluctuation of the water level in
Družmir Lake. Noise levels in the environment will go
down by as much as 70%. Moreover, less ash will be
generated per unit of electricity produced.
As the construction will be complex and extensive, it
will be divided into several phases. The construction
work is planned to start with the demolition of the
cooling towers of Units 1–2 and 3 in 2010. Unit 6 is
projected to start operating on a trial basis in 2014.
Planned construction schedule:
• 2009 – construction of the new telecommunications
centre;
• 2010 – demolition of cooling towers 1–2 and 3;
• 2010 – start of Unit 6 construction;
• 2012 – installation of equipment;
• 2014 – trial operation;
• 2015 – regular operation.
Upgrade of TEŠ's
Units 4 and 5
The installation of two gas turbines at Units 4 and 5 increased
the rated capacity of the units by a total of 84
MW. The investment resulted in higher electricity production,
while consuming the entire planned quantity
of coal, and a lower CO 2
emission factor per kWh.
Work on the project to upgrade Units 4 and 5 through
the installation of gas turbines progressed as planned.
ANNUAL REPORT HSE | BUSINESS REPORT
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