Cummins approves B20 biodiesel for 19- to 78-litrehigh horsepower engines

Cummins Inc. has announced the approval of B20 biodiesel blend for use with 19- to 78-litre high horsepower engine platforms manufactured after 1 January 2008.

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This approval provides a significant expansion of Cummins engine compatibility with B20 usage, bringing the environmental benefits of using a 20 per cent renewable fuel blend to high-horsepower applications in mining, oil and gas, rail, industrial and power generation markets.

Cummins high horsepower engines approved for use with B20 biodiesel include the Quantum Series engine platforms from the QSK19 to the QSK78, covering a wide 506- to 3500-hp range (377 to 2610 kW). Cummins K Series engine platforms from the K19 to the K2000E are also approved for use with B20 biodiesel across a 450- to 2000-hp range (336 to 1491 kW).

These high-horsepower engines will join Cummins EPA Tier 3 and EU Stage IIIA industrial engines already B20-approved down to the 80-hp (60 kW QSB3.3). “All the necessary components in our high-horsepower engine platforms built after 1 January 2008, are biodiesel compatible, enabling our customers an easy transition to biodiesel blends up to B20 with a few simple procedures,” said Jim Trueblood, Cummins’ vice-president, High-Horsepower Engineering.

“Following extensive review and fuel testing with B20 on these engines over the last couple of years, we can ensure that the same durability and reliability our customers depend on today using petroleum-based diesel fuel will be unaffected when switching to B20 biodiesel,” Trueblood added.

Cummins requires that biodiesel fuel blends above B5 and up to B20 used in all Cummins engines are purchased from BQ-9000-certified suppliers and meet both the revised ASTM D6751 and the new ASTM D7467 standards or equivalent international specifications.

“We are delighted to provide our customers with the option of using B20 biodiesel as an alternative and renewable fuel for high-horsepower applications,” said Edward Lyford-Pike, chief engineer, Cummins’ Alternative Fuel Programme.

“Biodiesel is a manufactured fuel produced from vegetable oils derived from organic sources and animal fats. Because biodiesel uses renewable resources as its origin, this provides the opportunity to reduce carbon emissions and helps to reduce dependence on petroleum-based diesel fuel.

“Cummins understands these environmental benefits and consequently we have worked diligently in completing all necessary testing and evaluations to ensure approval of B20 usage in our engines,” added Lyford-Pike.

Cummins continues participation in industry efforts aimed to improve the consistent quality of biodiesel. The availability of biodiesel from BQ-9000 accredited producers and certified marketers has increased significantly.

Working closely with the American Society of Testing Materials has resulted in an improved B100 specification (ASTM D6751) that now requires a cold soak test and a new B20 specification (ASTM D7467) that includes an oxidation stability requirement.

GE Energy unveils enhanced Jenbacher gas engines

GE Energy is introducing a next-generation, ultra-efficient Jenbacher ‘Type 6’ gas engine to help European Union member states comply with a directive to install new industrial, commercial and residential cogeneration systems that boost energy efficiency while reducing local fossil fuel consumption and greenhouse gas emissions.

Evaluated in ‘pilot’ combined heat and power (CHP) plants supporting two commercial horticultural greenhouse sites in the Netherlands, GE’s new ‘6F’ gas engines recently reached a critical performance milestone of 10 000 operating hours.

Even more impressive for customers: the new 3.3 MW 6F units demonstrated an increased output of up to 10 per cent and a crucial 1 per cent hike in electrical efficiency over existing systems.

For the pilot projects, Netherlands growers Kwekerij Baarenburg and Kwekerij de Kabel B.V. installed GE’s proven Jenbacher standardized greenhouse application (cogeneration with CO2 fertilization) à‚— each powered by a J612 6F unit à‚— to optimize energy efficiency and crop production.

The Baarenburg greenhouse is commercially cultivating roses, whereas the latter greenhouse previously had installed three of GE’s J616 Jenbacher gas engines at the same location, being a member of the Prominent Growers Association à‚— a leading Netherlands horticultural cooperative for tomato growers that has adopted GE’s Jenbacher CHP technology at a number of sites in recent years.

The operators of the Baarenburg and Prominent Kabel greenhouses have signed a full customer service contract with GE for the two 6F CHP plants that will cover the units up to their first major overhaul which is needed at 60 000 operating hours. The units feature electrical efficiency ratings of 44.1 per cent and 44.8 per cent, respectively.

The 6F design benefitted from GE’s development of the J624, as GE’s engineers were able to adapt the more powerful J624’s optimized combustion system to the new 1500 rpm Type 6F version engine models.

The key to the 6F’s increased performance is the capability to run the engine at a higher break mean effective pressure of 22 bar, enabling technologies such as steel pistons with optimized geometry, which have higher peak pressure capability compared to aluminum pistons.

A new-generation turbocharger with higher pressure ratio allows for optimized valve timing (so-called Miller) to further improve combustion, thus pushing the knocking limit. As a result of this optimized combustion, the unburned hydrocarbons are reduced.

Yanmar combines small size with big power in new diesel engine series

Yanmar announces the new ‘MM’ series diesel power solution for lawn and garden equipment, small agricultural machines, utility vehicles and compact generators.

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The 3TNM68 model is the first in this series to be released. This 784cc threeà‚—cylinder Tier IV compliant engine utilizes Yanmar’s proprietary indirect injection technology to achieve low fuel consumption and low emissions levels.

The engine block for this ultra compact and high performance power plant employs Yanmar’s latest structural technology to achieve low vibration, noise and size.

Thanks to a brand new, compact cylinder block design, Yanmar has been able to achieve higher output levels relative to the compact size of the engine. Due to the compact footprint, the MM is a perfect fit for applications that have tight space requirements and that demand high, reliable power output. Additionally, the universal base attachment design means the MM is perfectly suited to replace competitive engines.

High rigidity is achieved by incorporating a ‘ladder frame’ structure in the cylinder engine block. This reinforcement allows the MM to operate with low noise and vibration.

The MM incorporates Yanmar’s new proprietary MC type injection pump to achieve low fuel consumption and low emissions. This engine is already compliant with EPA Tier 4 regulation.

In addition to the TNV series, the new MM series will be released with the 3TNM68 model, and then later followed by the larger 3TNM72. Both engines in this series will be built at the Yanmar engine manufacturing facility in Shiga, Japan.

50 MW rental power project: KESC starts commercial operations

Karachi Electric Supply Company (KESC) has started commercial operations of its 50 MW rental power project for Karachi, Pakistan.

The project was completed in less than six months after its announcement in September 2008, and provides additional capacity to Karachis grid, aimed at providing relief to the consumers by minimizing power shortfall in the city.

The project, which marks the fastest-ever addition of capacity to Karachis power grid, was completed in two phases of 25 MW each. Installations have been made at two strategic sites of the city, with the current addition having been made in the West Wharf industrial area, while the initial 25 MW has been added at the Haroonabad site.

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