With the economy in Malaysia growing at 7.7 per cent and demand for electricity growing at the same rate, Malaysia Sabah Electricity Sdn Bhd (SESB) realised they were going to have to ramp up their energy output.
They had plans to build a 300 MW independent power plant, but knew they were going to have outages, particularly during peak demand, before the new plant could hang its ''Open for Business'' sign. They needed to manage power consumption during peak hours, and they needed to do it straight away.
We were chosen because we had the shortest lead time of any supplier. Our rapid response time, along with our extensive experience in rental installations and short-term power packages, convinced SESB we were the best people for the job.
We built a 15 MW 20 kV power package with generator transformers, bulk fuel tanks, and a control room in just three weeks. The package was operated by our technicians at full capacity for 12 hours a day during the peak time, and in standby mode for the other 12.
It was a win-win situation: SESB reduced their operating costs as they no longer had to supply peak amounts of power during high-load working hours. Local users could save on electricity bills by managing their consumption and shifting their electricity demands to cheaper, off-peak periods.
The predicted outages were avoided allowing local businesses to go about their daily activities and the economy to continue its growth path. Our package also allowed SESB to concentrate on long term plans, while we managed power consumption on their behalf.
Corvus Energy is pleased to announce that we have been selected by National Oilwell Varco (NOV) to supply the Energy Storage System (ESS) for another PowerBlade™ installation. PowerBlade is an innovative energy storing unit developed by NOV that receives and provides energy based on operational needs on board offshore drilling units.
PowerBlade is used in two ways to move towards a cleaner and more efficient future for offshore drilling: energy regeneration and peak shaving, each of which is explored below.
Energy Regeneration and Storage
Operations involving frequent and cyclic hoisting of heavy loads require high levels of energy from power systems to lift the loads. Until now, drilling units have not typically been able to make use of the regenerated energy created when lowering a load.
"Offshore drilling units perform advanced operations in uniquely challenging environments that involve waves, winds, and currents. Capitalizing on energy regenerated during heave compensation or tripping operations on offshore drilling units can be challenging," says Oddbjørn Øye, Product Responsible Energy Recovery Systems – Robotic Control Drive Tech & Winch at NOV.
PowerBlade works by absorbing the braking energy emitted when a drillstring is lowered, storing it in the ESS, and then reusing that energy for the next hoist of the drillstring.
"With our first PowerBlade installation, we determined that an energy storage system can reduce power consumption by the drawworks onboard a rig by up to 80% in active heave compensation mode compared to traditional design."
Peak Shaving for Optimal Generator Loading
On an offshore rig, the drilling drawworks places the heaviest burden on the rig''s energy supply by causing a wide variation in energy consumption over large power peaks.
"Typically, six to eight large diesel generators account for the rig''s total energy supply. An energy storage system smooths the load, levels out the power peaks of the lifting system, and provides the generator system a uniform load, improving equipment performance, enabling the generators to run at optimal load, and reducing wear and tear. By enabling some of the generators to shut down and run the remaining in high load, the ESS increases fuel efficiency and reduces emissions. A generator set running on high load consumes approximately 15% less energy compared to two generator sets when producing an equivalent total power. PowerBlade enables the operator to rely on a higher, optimum sustained generator load," explains NOV''s Øye.
Notable Emissions Savings
The impressive savings were shown ina study of the PowerBladeinstallation and other energy optimization projects onboard the drilling rig Deepsea Atlantic. Estimated savingson this specific drilling rig for the entire project, includingthe PowerBlade installation, were6.5 tonnes of diesel, 20 tonnes of CO2, and 300 kg of NOx per day compared to log data prior to the project.
Commitment to Reducing Carbon Footprint in Oil & Gas Production"We are proud to support the oil and gas industry in their increasing commitment to investing in the green technologies that will help reduce the carbon footprint of their operations," says Efraim Kanestrøm, VP Sales Oil, Gas & Renewables at Corvus Energy. "Corvus batteries combined with NOV''s flywheel technology gives a robust and efficient solution for reducing emissions and the cost of drilling rig topside operations."
He continues: "In light of the impressive results of the first NOV installation on the Deepsea Atlantic, we expect a large increase in offshore drilling rigs using energy storage technology for energy optimization in the future."
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