rem Engineering, Inc., P.O. Box 1955, Roswell GA 30077, (770) 594-9393, Fax: (770) 594-9368

CASE STUDIES

APS SELECTS rem ENGINEERING FOR RENEWABLE POWER PROJECT

Arizona Public Service (APS), Arizona's largest and longest-serving electricity utility has selected rem , to provide electric generation for its newest biomass project. "APS is committed to developing clean renewable energy sources today that will fuel tomorrow's economy," said Ed Fox, vice president of Communications, Environment and Safety for APS. "Biomass is one of those future energy sources, and in Arizona, it also can be part of a solution to our forest health issues."

 
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This is the second project of this kind for APS and continues to lay the foundation for future endeavors in this field. This project will consume approximately 96 tons of forested wood each day and generate 3 megawatts of electricity producing enough energy for up to 3,000 homes and businesses in the region. This biomass project reduces the risk of forest fire and improves the health of nearby forests by thinning small non-commercial size trees to produce clean, "green" electricity. A direct economic benefit to the local community is realized in the creation of full-time jobs necessary to operate the power plant and harvest trees that otherwise would have no use. By using the wood chips that are produced from the forested trees, APS expects to reduce greenhouse gas emissions by up to 15,000 tons per year. Trees that in the past would have been burned in the forest now will be burned in a boiler under controlled conditions, thereby producing fewer emissions.

rem , Inc. provided the thermodynamic engineering for the project including overall power plant heat balance due to their experience and expertise on similar scale, solid fuel electrical generation projects. rem also supplied all electrical generating equipment for the project consisting of a condensing steam turbine, synchronous generator, gear, baseplate, lubrication system, controls and condensing system.

While APS will get the green credits to apply to the Arizona Environmental Portfolio Standard - which, by 2007 will require APS to generate 1.1 percent of its power through renewable sources - it's the experience the company is gaining with biomass that may prove most beneficial. This power plant will help APS continue to develop a template to build biomass plants that use similar technology in other parts of the state. APS is exploring other forest-intensive locations with rem throughout the state to build green power plants. With headquarters in Phoenix, APS is the largest subsidiary of Pinnacle West Capital Corp. (NYSE: PNW).

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