Page 61 - Industrial Plant 2015
P. 61
n 2011, the Spig Group was awarded a contract condenser mounted on a hot dip galvanized steel
from Ansaldo Energia for the design, supply and support structure, was designed by Spig’s thermal and
construction of an air cooled steam condenser for mechanical engineering team to meet stringent
a 850 MW combined-cycle gas turbine power contractual performances for noise limits, wind &
earthquake impacts, thermal duty, plant layout
Iplant in Gebze, Turkey. The 42-cell, air cooled restrictions and vibrations control. In addition, the
condenser was designed by Spig to meet requirement was to complete the construction phase
stringent contractual performance for thermal duty, within a strict schedule.
noise limits, plant layout restrictions, vibrations, wind Being the plant nearby the city, the ACC could not
and earthquake impacts. exceed the prescribed noise values. In fact, it was
The 1 billion USD Combined Cycle Project (figure 1) developed in order to satisfy the overall noise emission
owned 60% by Unit and 40% by Ansaldo Energia, went limits. To minimize the level of noise, the ACC was
online in 2013, connected to the national grid, to equipped with wind cross solution for noise optimization,
provide power to the neighbouring industrial district as underneath the platform level (figure 3).
well as to cope with the electricity demand of 15 million The external perimeter of the condenser has been
households in Istanbul, complying with Turkey’s equipped with windwall, to minimize air recirculation.
emission requirements. The environmentally friendly Turkey is a highly seismic active area and during the
plant in 2+1 configuration uses the largest units
Fig. 2 – General
arrangement ACC
view
produced by Ansaldo Energia. This mainly Merchant design phase the seismic prescriptions were observed Fig. 3 – Wind cross
Plant, considered one of the cleanest of its kind in and implemented by Spig engineers, who had to solution
Turkey, is designed for heavy cycling with net efficiency consider both American Asce 7 and Turkish Tec 2007
Lower Heating Value, being one of the highest rates of standards.
its category. According to the project specific criteria, this flexible
In July 2011 the Spig Group was awarded a contract ACC has been designed for heavy cycling duty, for daily
from Italy’s leading builder of thermal power plants, start-stop (200 starts per year), daily variation from
Ansaldo Energia for the engineering, procurement and minimum to maximum technical load, fast start up, fast
construction of an air cooled condenser (ACC) for the load variation .
850 MW CCGT (Combined Cycle Gas Turbine) power
plant, in Gebze, Turkey (figure 2). The EPC Contractor
was a consortium of Ansaldo Energia & Yeni AEN
İnşaat A.Ş and the owner’s engineering, a consortium
of Tractebel Engineering & Coyne et Bellier.
In June 2013, the engineering, procurement, delivery
and construction were achieved, guaranteeing the
mechanical completion of the plant, in full compliance
with contractual milestones. In September 2013 Spig
carried out the commissioning and between December
2013 and February 2014 the performance test.
Technical features
The 42 cell, forced draught single row air cooled
Industrial Plants - May 2015
59
