GE introduces medium speed diesel engines

GE has launched the V250 12- and 16-cylinder medium speed diesel engines for stationary power applications. The new engines are said to deliver fuel savings of up to 6.5 per cent compared to GE’s earlier models, while offering 25 per cent greater power density.

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The 250mm bore, 12-cylinder engine produces 3180kW at 1050 rpm, 3035 kW at 1000 rpm and 2732 at 900 rpm, and the 16-cylinder engine produces 4237 kW at 1050 rpm, 4038 kW at 1000 rpm and 3632 kW at 900 rpm. Both engines meet the USA Environmental Protection Agency Tier II emissions standards.

The new engines are claimed to improve reliability, life cycle and safety. The new three-ring, articulated piston meets weight requirements, and exceeds peak firing pressure requirements, while the skirt and pin boss are supported by the piston pin and optimized to improve lubrication and guidance.

The cylinder head has increased safety by way of a wall that is supported by the head gasket. GE addressed design requirements for oil film thickness and pressure via a combination of an increase in bearing width and a smaller oil groove in the bearing shell. The cylinder head, water jacket, cylinder liner, piston and conrod can be exhausted from the engine as one assembly by removing a minimum number of fasteners.

Ease-of-use mobile generators launched

Ingersoll Rand has launched seven new mobile generators with design features inspired through extensive market research to meet customers’ requirements. The new PowerSource generators are the G90, G145, G185, G240, G290, G450 and G570 models, ranging from 75 to 456 kW.

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The new line completes the PowerSource mobile generator line, which was introduced in 2005 with the G10 to G125 models (ranging from 10 to 125 kW). The new G90 and G145 will launch simultaneously as United States Environmental Protection Agency Tier III emissions-certified replacements for the G80 and G125.

All seven new models feature controls and connection points grouped at the rear of the unit in an ergonomic power pedestal designed to maximise operator convenience and safety. Ingersoll Rand claims that operators will prefer the large terminal board, which is set to make cable connection an easier task.

Furthermore, the controls have been designed for ‘at-a-glance’ monitoring with easy-to-read analogue gauges and LED indicator lamps. An easy-to-use engine controller, featuring remote automatic start/stop capability, has been incorporated on all three-phase models. The control panel layout is common across the PowerSource range, reducing complexity and simplifying operator training.

In addition to their convenient design features, the mobile generators include alternators with AREP (auxiliary regulation excitation principle) technology, which Ingersoll Rand says provides excellent voltage regulation ideal for powering applications such as compressors, pumps and other loads with high start-up demands.