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ADVANCED MANUFACTURING OFFICE Barriers • Developing a different design concept not currently used by microturbine manufacturers • Developing new materials, such as ceramics or metal alloys, suitable for higher temperatures • Designing a more compact and highly effective recuperator to operate at higher pressures • Optimizing a new combustion chamber to operate at higher temperatures and pressures with reduced pollutants • Testing the limits of air bearings for microturbine’s increased output • Developing control algorithms for multi-shaft microturbines • Integrating a high-efficiency exhaust heat recovery system Pathways Capstone Turbine Corporation is leading this project. Oak Ridge National Laboratory (ORNL) and the NASA Glenn Research Center are supporting Capstone on specific project objectives. ORNL will assist with the high-pressure recuperator and high- temperature radial turbine materials. NASA Glenn will evaluate a larger air bearing design for the high-speed generator. The first phase of the project is to design and demonstrate the elements of the C370 CHP system that represent the greatest challenges of technical development. Capstone will design and integrate a low-pressure compressor and turbine system using a modified version of the C200; high-pressure, high-temperature compressor and turbine system; combustion system; intercooler; and high-pressure recuperator to create a two-shaft C370 engine. Capstone will integrate heat recovery technology to complete the C370 CHP system. This system will be tested and demonstrated in the field to validate performance. Milestones • Validation of technology and design • Development of low pressure system • Integration of low- and high-pressure systems • Completion of C370 engine • Integration of heat recovery system • Testing and field demonstration of CHP system Commercialization The C200 was developed in part with support from the U.S. Department of Energy’s Advanced Microturbine Systems program. The 200 kW microturbine has a net electrical efficiency of 33%; therefore, achieving 42% net electrical efficiency and 85% total system efficiency in a CHP application for the C370 is feasible. Such high efficiency combined with emissions levels that are below California Air Resources Board (CARB) requirements and competitive capital cost of $600 per kW is expected to make the C370 an attractive product in the marketplace. Capstone will use its current distributor and original equipment manufacturer (OEM) business model to directly market the C370 microturbine CHP system, which will be offered for sale within 12 months after successful demonstration of the project. The planned level of U.S. sales for 2020 is approximately 500 units. Using this projection, the total C370 U.S. installed base is estimated to be 2,700 units by 2020. This would account for 1 gigawatt (GW) of electric generating capacity. Project Partners Capstone Turbine Corporation Chatsworth, CA Principal Investigator: Daniel Vicario E-mail: dvicario@capstoneturbine.com Oak Ridge National Laboratory Oak Ridge, TN NASA Glenn Research Center Cleveland, OH For additional information, please contact Bob Gemmer Technology Manager U.S. Department of Energy Advanced Manufacturing Office Phone: (202) 586-5885 E-mail: Bob.Gemmer@ee.doe.gov For more information, visit: manufacturing.energy.gov DOE/EE-0432 • June 2014 Printed with a renewable-source ink on paper containing at least 50% wastepaper, including 10% post consumer waste.PDF Image | High Efficiency Microturbine with Integral Heat Recovery
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