Dubai's Dewa claims world record for outage duration during overhaul

Authority reengineers the SGT-4000F gas turbine at Jebel Ali Power and Desalination Complex in 11 days instead of 30

Dubai's Dewa completed the overhaul in 11 days.
Dubai's Dewa completed the overhaul in 11 days.

Dubai Electricity and Water Authority (Dewa) is said to have broken the world record for major inspection outages by reengineering the gas turbine SGT-4000F overhaul process at its Jebel Ali Power and Desalination Complex, completing the inspection outage within 11 days instead of 30, allowing for a 63% decline in outage duration and increasing the availability of its gas turbines.

Dewa’s managing director and chief executive officer, Saeed Mohammed Al Tayer, said the gas turbines and steam turbines in the same train provide 63.2% of Dewa’s gas plant power generation capacity.

They also serve 55% of the total thermal energy needed to produce the desalinated water that Dewa provides to Dubai.

According to UAE state news agency, Wam, 461 similar units are active around the world, with 46 in the UAE.

The project to reduce inspection outages started in October 2018, with a 200-strong team, including 176 field staff, reducing the major inspection outage time of the GTK53 unit at K Station to 11 working days from 20.

Dewa’s executive vice president of generation, Nasser Lootah, said the same outage period was also achieved on GTK52 of K Station in April 2019.

Major inspection outage periods are, over the next 12 years, expected to increase the availability of high-efficiency units and use time by 756 days, according to Wam’s report.

Commenting on the project, Al Tayer said: “[The achievements] show the strategic importance of the project to Dewa. In order to ensure its success, a Project Charter was initiated with a clear vision and strategic objectives in line with Dewa’s vision of being a globally leading sustainable innovative corporation."

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