Power Generation | NaturalGasEfficiency.org

Power Generation

On-Site Power Generation


Generating electric power on-site is as old as the industrial revolution. As central power plants became abundant and main stream, only the largest industrial facilities found it economical to continue to generate their own power on-site. Starting in the the mid-1970s, a new generation of smaller, engine-driven generators were developed for continuous operation. Federal legislation was passed and a whole new industry of on-site power generation was ‘re-born.’ Today, it is legal to connect to the electric grid for back-up/supplemental electric power and to even generate power back into the grid. However, the economics of doing it remain very challenging.

Energy Efficiency

There is no question that generating electric power on-site and capturing and using the waste heat off of the engine-genset is far more energy efficient than central power plants that dump all the waste heat to the environment. Central power plants generate electricity at about 30% efficient (large coal-fired boilers) or as high as about 60% if using combined-cycle fuel-fired turbines. They then loose up to 10% of that electricity in the Transmission and Distribution Grids getting it to the point of use. On-site power generators can get a combined efficiency of over 80% when using all of the electricity and waste heat. The challenge is doing it economically competitive with grid power and purchased natural gas for direct gas-fired applications.

If you have an application to use a simultaneous amount of electricity and waste heat for large portions of the year, then you should look further into on-site power generation. If you only need heat or only need electricity, then on-site power generation is not likely a viable economic option.

More Information

For a complete Tutorial and comprehensive manufacturer’s Product Guide of on-site electric power generation, (Cogeneration, CHP, DG) please go to our Distributed Generation Consortium web site at www.poweronsite.org


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