Cummins launches new low-BTU genset

Cummins Power Generation has introduced a new low-BTU generator set series that is specifically designed to run on the dilute methane gas mixture produced by natural decay in landfills, sewage digesters, or methane emitted from coal seams. The new GQ series of gensets produce a continuous 1570 kW (50 Hz) or 1750 kW (50 and 60 Hz) running on low-BTU gas.

The GQ range operates on low-BTU gases produced by landfills, sewage digesters and emitted from coal seams
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Multiple units can be paralleled for higher power production at large landfill sites. Minimum pre-treatment is required for the landfill gas to remove particulate matter and excess water vapour. Any additional pre-treatment is dependent on the quality of the gas at a site, and project economics.

Powered by modified versions of the model QSV81G 16-cylinder and QSV91G 18-cylinder natural gas reciprocating engines, the new GQ series gensets feature an enlarges fuel delivery system, double safety gas shutoff valves, and special coatings and bearing materials to withstand the corrosive contaminants typical in landfill gas.

A Cummins low-BTU generator at a landfill site in Shrewsbury, UK, has accumulated more than 5700 hours of operation. Future installations include a wastewater digester site in the Canary Islands, and the Viridor Waste Management landfill near Edinburgh, UK. At Viridor, Cummins is developing a complete turnkey 3.5 MW power plant using two low-BTU generator sets.

A leapfrog to new controls

Dale Power Solutions has completed a complex upgrade to the diesel generator plant at UK-based Sutton and East Surrey Water’s largest works without interruption to the treatment process.

All four standby generators at the Cheam waterworks were migrated one by one to a new state-of-the-art control system, ensuring that they could still work together in the event of a mains power failure. Dale also upgraded the air start system, and installed a new engine room ventilation/acoustic system to limit noise emissions. Every part of the standby system was replaced except the original generators.

The waterworks serves the predominantly residential Sutton area, and was built in 1977 to meet increasing demand for water. Even then, peak summer demand was well above the national average and this trend continues with the growing local affluence. For the water company, it had to be a high capital cost and high maintenance waterworks because of the site’s residential location and use of hydrochloric acid to meet the company’s statutory obligation to soften the water.

The Mirlees Blackstone diesel generators remain in good order but the original control system had become increasingly unreliable. Dale’s engineers have now ‘leapfrogged’ the generator plant to the latest control technology, increased its reliability and taken it to full automation. SESW is also assured of availability of spare parts in the future.

Ener-G drives carbon emissions reduction

UK-based Ener-G has completed the installation and commissioning of a tri-generation packaged energy system for the Driver Vehicle and Licensing Agency (DVLA) in Swansea, UK. The new system will help the site to reduce its energy consumption and carbon dioxide (CO2) emissions in line with the government’s commitment to promote ‘green’ energy.

Ener-G has completed the installation and commissioning of a tri-generation packaged energy system for the UK’s DVLA
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The DVLA consulted with Ener-G to find a more efficient way of running the on-site building services for all six of its administrative buildings at its Morriston site in an effort to meet government targets on reducing CO2 emissions.

Specified following a competitive tender, Ener-G provided a fully containerized tri-generation system featuring a 1 MW combined heat and power unit and a 700 kW absorption chiller. These systems operate seven days a week providing electricity, medium temperature hot water and chilled water to the site.

The Ener-G 1150 natural gas CHP unit recovers heat from both the engine cooling circuit and the exhaust gases, enabling it to provide 1400 kW of heat at full output. The unit delivers 1150 kW of electric power at 100 per cent output and is configured to match the electrical demand of the site.

Olympic power

As the world’s largest sporting event got underway in Athens in August, GE Energy’s rental business was helping to ensure that the lights stayed on. As an official supplier to the 2004 Games, GE Energy provided the temporary and backup energy services for the 2004 Olympic Games, August 13-29, and the Paralympic Games, September 17-28.

Rental equipment and services from GE offered backup power to a total of 45 Olympic sites including all competition venues, the International Broadcast Center, the Main Press Center, the Olympic Village which houses more than 10 000 athletes from over 200 countries, and seven media villages. In addition, GE supplied the NBC broadcast of the Games, three Athens Olympic Broadcasting secondary compounds and 50 per cent of the lighting power needs for 35 sports venues.

“We are honored to be an official supporter to the Athens Olympic Games. Our world-class team of skilled engineers, technicians and support staff is playing a significant role in supporting these successful Games,” said Luis Ramirez, president of GE Energy’s rental business.

GE Energy’s rental equipment deployment included 375 diesel generators, 24 transformers ISO-rated at 300 kVA, 1100 distribution panels, and over 290 km of electrical cables and distribution and protection systems.