GE has developed the world’s first two-stage turbocharged gas engine and is applying this game-changing technology to its Jenbacher J624 gas engine.

The new engine provides significant output and efficiency increases compared to the single turbocharged version and is particularly well-suited for operation in hot environments and combined heat and power (CHP) applications. The new engine will be available to customers worldwide by the summer of 2011.

“We are proud to be the pilot customer for this new J624 gas engine with two-stage turbocharging,” says Jaap Noordam, owner of Red Harvest. “The new engine not only provides us with higher efficiency, but also offers us higher flexibility for our CHP operations.”

With the new system, which GE developed with specialists from ABB Turbo Systems Ltd, the J624 achieves approximately ten per cent higher output, increasing from 4 MW to 4.4 MW and offers an electrical efficiency of 46.5 per cent, an increase of about one percentage point. Improved efficiency is critical for the competitive cost of electricity and for the reduction of CO2 emissions in a carbon-constrained environment.

“With this technology breakthrough, GE continues to lead innovation in gas engines and has become the first gas engine manufacturer using two-stage turbocharging technology, enabling us to offer our customers significant performance improvements. While this technology initially is being applied to our largest gas engine, the J624, eventually it will be offered with other engines in our portfolio,” said Prady Iyyanki, CEO-gas engines for GE Power & Water.

Introduced by GE in 2007, the J624 is the world’s first 24-cylinder gas engine for commercial power generation, used in various applications.

“The J624 two-stage turbocharged is a real-game changer, especially for applications in countries with hot and humid conditions,” Iyyanki added. “The advanced boost pressure allows us to significantly push the gas engine operating range and maintain full output and efficiency at high ambient temperatures and high elevations. We view this enabling technology as a key for future success in the gas engine business.”

The two-stage turbocharging offers a much higher charging efficiency, which significantly contributes to the engine’s overall increased efficiency. In addition to the higher charging pressure, this technology also significantly improves the power density of the engine allowing it to run beyond 22 bar BMEP (brake mean effective pressure).

Applications for the new two-stage turbocharged gas engine include Independent Power Producer, CHP, trigeneration and special applications using natural gas fuel, as well as a wide range of non-natural gas fuels.



Rolls-Royce wins power systems orders worth over $200m

Rolls-Royce, the global power systems company, has announced orders worth over $200m for electrical power generation equipment from customers in Australia, Bangladesh, Spain, Venezuela and Yemen.

Announcing the new orders at the POWER-GEN Europe conference in Amsterdam, Charlie Athanasia, Rolls-Royce, Executive Vice President Power Generation, said: “We are very pleased to announce these new contracts which demonstrate the growing confidence power generators have in our technology and track record of delivery. Rolls-Royce Bergen products remain extremely competitive and we have now sold Trent units to operators in 19 countries. Rolls-Royce is not only delivering the extra power our customers need, but our advanced technology also creates lower emissions levels, benefiting the environment.”

The new orders consist of 25 Bergen diesel engines, five Bergen gas engines and six Trent 60 gas turbines, which in total are capable of producing over 560 MW of electrical energy for the five new customers.

The largest contract announced today, valued at $75m, is from Bangladesh’s largest EPC Company, Energypac Power Generation Limited for 24 Rolls Royce Bergen B32:40,16 cylinder diesel engines to be owned by the Bangladesh Power Development Board. Sixteen engines will provide 100 MW of power at the Gopalgunj power station and eight engines will provide 50 MW of electrical power at Faridpur following entry into service in August 2011.

All the engines will run on heavy fuel oil and will supply electricity to the country at times of peak demand as part of a significant power development programme initiated by the country’s Prime Minister Sheikh Hasina who is also in charge of the Ministry for power.

Contracts from Australia and Venezuela will see a total of six Rolls-Royce Trent 60 gas turbine electrical generating packages delivered with a value of $110m.

In Darwin, Australia, the Power and Water Corporation has selected two Trent 60 packages to deliver 116 MW at their Channel Island power station, helping provide electricity to a region where power demand is increasing by four per cent per year. The two Trent units will increase the generation capacity by about 25 per cent.

More Power Engineering International Issue Articles
Power Engineering International Archives
View Power Generation Articles on