The Zest WEG Group, through subsidiary Zest Energy and its technology providers, successfully completed a benchmark steam turbo generator set contract at Mondi Richards Bay. The scope of work included the design, manufacture and delivery as well as complete installation and commissioning of the steam turbo generator set and associated equipment. OEM supervision services were also provided during installation and commissioning, with 24/7 on call support.
Zest Energy supplied the turbo generator set equipment and took the overall lead on the package, which included steam technology from TGM Turbinas of Brazil and generator technology from WEG Electric Machinery in the USA. Local subcontractor, Turbine Generator Services undertook the mechanical installation portion of the scope. Bosch Projects was the official EPCM contractor on the project.
Mondi already had a 38 MW extraction back pressure steam turbine and a 34,3 MW extraction condensing steam turbine, and required a new 48 MW multi-extraction condensing steam turbine to take up the additional high pressure steam from the plant at full load. The power generated is used on site with the excess exported to the national grid. “To install a complex system into an existing system that is equally complex to begin with is not an easy task, says Alastair Gerrard, general manager at Zest Energy. “Zest Energy’s experience in electrical infrastructure, substations and power generation, especially on both standby and continuous power plants, meant we could draw on all this experience and apply it to the Mondi Richards Bay project, with all the electrical integration scope carried out in-house, making us unique in the marketplace.”
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