The power of the cube
Wärtsilä Corporation has introduced the PowerCubes to provide industrial customers, utilities and independent power producers with small power plants based on one to three generating sets.
The PowerCubes are complete single-engine power plants with all the auxiliaries and components needed to form a working power production unit. Each plant has a cube-like construction, with radiators on the roof and an exhaust gas stack close to or integrated within it.
The PowerCubes are based on the Wärtsilä 32 or Wärtsilä 20 engines in the oil fired Wärtsilä OilCube, and the Wärtsilä 34SG engine in the gas fired Wärtsilä GasCube, each providing up to 9 MW. The PowerCubes are delivered with all components and structures above ground.
The PowerCubes have a low voltage electrical and automation system inside, including plant PLC. The plant can be monitored and operated remotely or at freely placed working stations.
Its standardized cube design gives flexibility in optimizing the layout for the plant. Starting with a single PowerCube, customers can develop their power plant by adding new, easily interconnecting others as their demand for power grows.
Cummins gas engine emissions up to speed
Cummins Inc’s GTA8.3SLB gas compression driver is meeting the USA Environmental Protection Agency’s (EPA’s) proposed new source performance standards (NSPS) for stationary spark-ignited engines ahead of schedule.
The GTA8.3SLB meets the NSPS standard close tonine months ahead of the target promulgation date of 1 January 2008 for engines in the 25-500 hp (19-373 kW) power bands.
The Cummins GTA8.3SLB is rated at 175 hp (130 kW) and features a simple lean burn configuration that meets the 2-g nitrogen dioxides (NOx), 4-g cabon monoxide and 1-g non-methane hydrocarbon output-per-horsepower-hour EPA proposal, while providing performance and reliability through its simple design. The engine also meets the Four Corners Bureau of Land Management 2-g NOx requirements.
The GTA8.3SLB engine incorporates many of the same durable internal components, including the block, crankshaft, camshaft and connecting rods, as used in the Cummins C Series diesel engines. This “parts commonality” provides the advantage to the operator in terms of the proven reliability and long life of the components, familiar servicing and parts availability.
The reliability of the GTA8.3SLB is further enhanced through the use of Cummins air/fSAuel ratio control, an Altronic CD200 electronic ignition and a Woodward electronic governor. Furthermore, through Cummins expertise in controlling the combustion process, the GTA8.3SLB meets the 2-g engine-out level without the use of detonation sensors. With the addition of an oxidation catalyst, the GTA8.3SLB is able to meet many regional emissions standards.
Biodiesel engines to be unveiled
Perkins Engines has announced plans to use B20 biodiesel – 20 per cent dilution of biodiesel with standard diesel – across its range of 400D and 1100D Tier 3/Stage IIIA-compliant engines.
Engines compliant with B20 will gradually be released over the course of 2007, beginning with the 400D Series this month and the 1100D in May. Subsequent models will be unveiled throughout the rest of the year. Service intervals will remain at 500 hours, and two-year warranty operation remains unchanged.
Perkins has recently concluded a series of 12-month test programmes using B20 biodiesel to power Tier 3 engines, and has been working with a number of OEM customers to trial higher percentage blended fuels in their machines. Initial results point to trouble-free operation.
With the growing acceptance of biodiesel as a fuel source and the move towards higher percentage blends, Perkins believes this is a good time to inform OEMs and end users of its intentions, while offering guidance as to how to manage biodiesel use.