GE Introduces the new J920, a larger power-generation engine with pioneering gas technology

Source: GE

GE’s (NYSE: GE) Jenbacher announces the development of a new, larger, power-generation gas engine—the J920 engine. With electrical efficiency of 48.7 percent and an output of 9.51 megawatts (MW), the new J920 engine is the most efficient in its class and it extends GE’s technical leadership in power generation gas engines. The J920 gas engine provides enough energy for 18,500 average European households. It was introduced at a ceremony held today at GE’s facility in Jenbach, Austria.

The new, power-dense engine is highly attractive from both a customer and environmental perspective as its higher efficiency not only reduces lifecycle costs due to lower fuel consumption, but also simultaneously cuts greenhouse gas emissions. In comparison with commercially available gas engines in the same output range, the operation of one J920 can prevent about 1,500t of CO2 emissions annually. This corresponds with the emissions from about 800 average European cars. In the same period, fuel savings of more than €217,000 (US$298,117) can be achieved due to lower gas consumption.

The J920 is especially suitable for decentralized, independent power supply in remote, hot or high-altitude regions for use in combined heat and power applications and the stabilization of power grids. The prototype of the engine has been undergoing successful testing on a purpose-built test bench at GE’s Jenbacher manufacturing facilities in Austria since late summer.

A large-scale pilot program is next, during which the new engine will be put into operation for the first time at the “Stadtwerke” (the municipal utility company) of the town of Rosenheim, Germany. Following this test phase, serial production is scheduled to begin, and the new engine should be available for use in applications in 50 and 60 Hz countries in 2012.

The electrical efficiency of the J920, which is an important indicator of the economic and environmental impacts of an engine, has been raised by more than 2 percentage points to 48.7 percent. Thus, the new 20-cylinder engines attain the highest value of all the engines that are commercially available worldwide in this class.

Through this innovative gas engine, GE is set to continue its successful technological run, which is based on more than 50 years of experience in the design and manufacture of power generation gas engines in tandem with systematic innovation. In June of this year, GE achieved another technological advancement with the world’s first gas engine with two-stage turbocharging. This new technology has been used to raise the output of the J624, which to date was the largest Jenbacher gas engine, from 4 MW to 4.4 MW and to increase its electrical efficiency to a notable 46.5 percent.

From a technical standpoint, the pioneering design of the J920 is based on proven core elements from the combustion systems used in Jenbacher 6 series. Moreover, the J920 employs an innovative three-module concept, which results in a top quality, standardized generator-set comprised of the engine itself, a generator and an auxiliary module produced at GE’s Jenbacher plant. In addition, like the recently presented J624 engine, the new J920 is equipped with the innovative two-stage turbocharging system.

Particularly high efficiency levels of 90 percent and more can be achieved when the J920 is utilized for combined heat and power. In this case, the J920 module provides fuel savings of more than 130 million kWh of primary energy (76,000 barrels of oil), while preventing more than 7,800t of CO2 emissions2. Therefore, the J920 corresponds precisely with the objectives of GE’s global ecomagination initiative, within the scope of which, the company promotes innovative technologies for the reduction of all types of emissions.

Another benefit for customers is the high power density of the new engine in ratio to comparatively low investment costs. As a result of the use of the new GE two-stage turbocharging concept, the J920 also is suitable for operations in hot and humid environments, as well as high-altitude regions. This means that a stable, reliable and decentralized power supply can be ensured even under extreme conditions.

The fact that the engine reaches full output in only five minutes also increases its attractiveness for use as cover for demand peaks. Short delivery times, fast and easy installation, simple servicing and maintenance and high levels of operational flexibility represent further advantages. The latter relates to the fact that any number of J920 modules can be combined with a powerhouse concept in standardized power plant solutions. Highly standardized interfaces and the proven Jenbacher DIA.NE® XT 3 control system provide additional benefits.

J920 – Features at a glance

Output

* 9.5 MWel
* Corresponding to the power requirements of 18,500 European households

Electrical Efficiency

* 48.7%

Total Efficiency (CHP)

* 90% and more

Annual CO2 Savings

* 1,500 tons CO23
* 7,800 tons CO2 as CHP application4

Key Applications


* Independent power supply (IPP)
* Combined heat & power
* Hot and high-altitude regions
* Power grid stabilization, e.g. backup wind parks

Benefits

* High power density at low investment costs
* Quick start-up of 5 minutes
* Fast, easy installation and maintainability
* Full plant flexibility with any multiple engine installation

Commercially available


* From 2012 on for 50 and 60 Hz countries



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