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Sulaymaniyah 1,500 MW Combined Cycle Power Plant

In 2013 MGH – Mass Group Holding Ltd. signed an EPCC contract with ENKA to convert its Sulaymaniyah Independent Power Project (IPP) from simple-cycle to combined-cycle technology.

The existing simple cycle Sulaymaniyah Gas Power Station was developed by MGH – Mass Group Holding Ltd. with a capacity of 1,000 MW with eight GE – 9E gas turbines.

The combined-cycle gas turbines (CCGT) conversion added 500 MW to the project making the overall capacity of 1,500 MW, by using steam turbines manufactured by GE.

Sulaymaniyah Combined Cycle Power Project is designed to work on two types of fuel – natural gas as the primary and diesel as the secondary source and will utilize the exhaust heat produced by the existing Sulaymaniyah Gas Power Station.

Project Description

Sulaymaniyah 1,500 MW Combined Cycle Power Plant

  • Engineering
  • Procurement
  • Construction
  • Testing & Pre-Commissioning
  • Commissioning
  • Start-up

Project Features

Contract Type
Lump Sum Turn Key
Scope of Work
Engineering, Procurement, Construction, Testing & Pre-Commissioning, Commissioning, Start-up, Training of the personnel
MGH – Mass Group Holding Ltd.
ENKA İnşaat ve Sanayi A.Ş.
Key Quantities

Earthworks260,000 m³
Concrete45,000 m³
Structural Steel5,800 tons
A/G Piping2,000 tons
Cabling1,100,000 lm
Mech. Equipment 36,000 tons
Insulation & Paint 52,000 m²
Buildings 6,500 m²

Project Duration

Start Date01.07.2013
Finish Date27.07.2016
Duration37 Months


Sulaymaniyah, Iraq

The project consists of conversion of live simple cycle to a combined cycle power plant project under brown field conditions. ENKA worked under unstable grid conditions, nevertheless, the company successfully managed to minimize the negative impacts of the grid on the power plant by implementing tailor-designed control.

One of the major challenges of the project was to work under major civil unrest in the region. ENKA prepared and implemented a solid safety and security plan based on risk avoidance through careful planning and defensive protection measures to cope with the challenges. The company’s security approach consisted of good community relations, counter-measures to reduce the risk by deterring, detecting or delaying the threat, and an ever ready evacuation plan should any incident occur. Through this approach, ENKA minimized the potential risk factors and managed to work without interruption and with no effect to contract schedule.

Due to the circumstances, at times, shipments to the jobsite were interrupted and high labor turnovers were experienced causing ENKA to apply and obtain visas for the new workforce multiple times.

Similarly, a US based engineering subcontractor, European and Japanese vendors restricted their engineers to visit the jobsite due to security concerns. ENKA handled all of these challenges by true commitment of the project team to the project’s success, extensive planning, and careful recruiting program and by carrying adequate redundancy at each phase of the execution.

Flexible logistics management approach has been used during project execution by creating alternative shipping solutions and making timely and accurate decisions and adapting to the frequently changing Iraqi Customs regulations.


The major works under the contract are the design, engineering, procurement, shipment/delivery, installation construction, interconnection, pre-commissioning, commissioning and start-up of eight HRSG’s, two nominally rated 250 MW GE STG’s, two GSUs, an air cooled system and all other balance of plant equipment to convert the simple cycle plant into two blocks of 4x4x1 combined cycle configuration as well as demonstration of parallel operation with the grid at the required net output, performance testing, classroom training of the operating and maintenance personnel, and preparation of integrated operation and maintenance manuals. The scope also includes a 400 kV switchyard for which the interconnection point will be a dead-end structure to be erected by the Ministry of Electricity.

ENKA workforce reached to 1,285 employees during the peak periods of the project. ENKA also provided training for the O&M personnel who would be operating and maintaining the plant.

  • Sulaymaniyah Combined Cycle Power Project is designed to run on two types of fuel, mainly natural gas, and diesel fuel as standby. The natural gas reaches the station via pipelines from Khor Mor gas field station, while the diesel is transported to the plant via mobile trucks. Then the diesel is purified and treated before it can be used for the turbines.
  • 3 million work hours without a lost time incident.
  • Global Best Project of 2017 by Engineering News-Record (ENR) under the Power/Industrial category.
Type of PlantCombined Cycle Power Plant
Capacity1,500 MW
Type of FuelNatural gas as the primary and diesel as the secondary source
Steam Turbine GeneratorGeneral Electric, Unit: 2 Sets, Model: C7, Rating Per Unit: 252 MW
HRSGCMI, Unit: 8 Sets, Type: Vertical – Natural Circulation Cold Casing
Cooling TypeAir Cooled Condenser, GEA, Unit: 2 Sets, Type: Each with 40 cells


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