(3BL Media / theCSRfeed) Pontiac, MI - February 3, 2012 -Engineers at General Motors’ Pontiac Engineering Center are powering parts of the facility with excess energy produced from testing engines.

Since Pontiac began the energy efficiency project following a 2008 renovation, the facility has regenerated more than 26.7 million kilowatt hours of energy to power internal processes. This is the equivalent of the electricity consumed by 2,326 U.S. households in one year.

储蓄绝非偶然。通用汽车工程师在四年前对该设施进行了翻新和扩展时，以这种能力进行了建造。

“Pontiac was a brownfield project, which meant parts of it were in existence already, but other wings of the facility had to be built from the ground up,” said Dave Gunnels, engineering manager for Pontiac test facilities. “The benefit of building from scratch was that we were able to bake in energy efficiency aspects directly into the system, rather than trying to retrofit.”

The energy generated from engine testing powers air conditioning and lighting in the laboratory area. Besides lowering the overall energy output, it allowed GM designers to downsize the transformers and network architecture -- similar to a motherboard in a computer -- because not as much original energy would be needed.

Gunnels说：“我们在设计升级系统时提出的所有内容都是基于再生能力的可用性，例如我们从发动机中汲取的功能。”“如果我们没有重新使用功能，我们的公用事业成本将会更高。”

The facility also cleans the remaining engine exhaust before it is released into the atmosphere. A common ductwork system collects engine exhaust and helps it travel through thermal oxidizers outside the plant before being released into the air. The “destruction efficiency” is 96 percent, meaning all but 4 percent of hydrocarbons and other constituents are removed before release.

Pontiac has four thermal oxidizers at its disposal, used only on an as-needed basis.

“If we’re running fewer test engines within the facility, we might only have one or two units operating,” Gunnels said. “We don’t want to consume more energy than we need to.”

For more information on GM’s environmental commitment, visit itssustainability reportandenvironmental blog.

General Motors Co.(NYSE:GM, TSX: GMM) and its partners produce vehicles in 30 countries, and the company has leadership positions in the world's largest and fastest-growing automotive markets. GM’s brands include Chevrolet and Cadillac, as well as Baojun, Buick, GMC, Holden, Isuzu, Jiefang, Opel, Vauxhall and Wuling. More information on the company and its subsidiaries, including OnStar, a global leader in vehicle safety, security and information services, can be found athttp://www.gm.com.

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