lower power input. Here, the original fixed-speed, 11 kV, 5.5 MW motor could be replaced with a 3 kV, 3.5 MW unit controlled via a variable speed drive. Power will be reduced from 4.5 MW to 1.8 – 2.0 MW, depending on operating conditions, while motor efficiency will increase from 96.4% to 96.9%, providing considerable energy savings. This reduces carbon footprint, important when governments are imposing environmental taxes based on carbon emissions. Measure twice, fit once The reduction in motor power and discharge head enabled many original components to be retained, but a new lateral analysis of the de-staged unit was conducted, confirming the pump rotor stability throughout the operating speed range. Due to the reduced speed of the new electric motor, the lube oil system output had to increase. A modification of the lube oil pump increased output by 30%, satisfying the demand of the pump, gearbox and motor. Pipework also needs to be approached carefully to avoid costly reworks on site. This can be achieved cost-effectively by using pipework with ‘green ends’ allowing it to be cut and welded in position on site, achieving a perfect fit. An alternative is to deliver the pipe and fittings to all the pipework to be fabricated on site. Taking advantage of retrofit Using updated equipment that fits back into the original footprint and performs at the best efficiency point has clear benefits. In many cases, time is of the essence and with refits being completed in dry docks, it’s important to minimize the project time. A well-planned retrofit project can be completed within six weeks and minimizes changes to surrounding pipework and infrastructure. There are also environmental advantages. Retaining most of the components means the original asset isn’t disposed of, producing less waste. In the previous case study, the electrical motor was the only major item that wasn’t reused and instead recycled. Moreover, retrofits require much less energy and materials, maximising sustainability and contributing to environmental, social and corporate governance (ESG) goals. 0114 349 0766 • info@plascompo.com • www.plascompo.com ECO RANGE OF PROTECTIVE CAPS & PLUGS Made entirely from second-life plastic Available now… Retrofits offer significant benefits compared to procuring replacement pumps. The most obvious is the financial saving – approximately 10% of the cost of a new pump.
RkJQdWJsaXNoZXIy MjQ0NzM=