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Design of a Partial Admission Turbine for an Organic Rankine Cycle With Environmental Fluctuation Consideration

[+] Author Affiliations
Hooshang Heshmat, Andrew Hunsberger, James F. Walton, II

Mohawk Innovative Technology, Inc., Albany, NY

Paper No. POWER2016-59386, pp. V001T08A012; 8 pages
doi:10.1115/POWER2016-59386
From:
  • ASME 2016 Power Conference collocated with the ASME 2016 10th International Conference on Energy Sustainability and the ASME 2016 14th International Conference on Fuel Cell Science, Engineering and Technology
  • ASME 2016 Power Conference
  • Charlotte, North Carolina, USA, June 26–30, 2016
  • Conference Sponsors: Power Division, Advanced Energy Systems Division, Solar Energy Division, Nuclear Engineering Division
  • ISBN: 978-0-7918-5021-3
  • Copyright © 2016 by ASME

abstract

This paper describes the design and testing of a high-efficiency turbo-generator for use in an Organic Rankine Cycles (ORC) with a power target of 30–100 kWe. The elegant yet simple design consists of a hermetically sealed, single piece rotor, with axial turbine and permanent magnet generator. The design employs compliant foil bearings (CFB), which eliminate the need for any external lubricates or dynamic seals and no contamination risk to the process fluid. A unique partial admission turbine concept is employed which provides better than 80% efficiency across a wide range of seasonal temperature variation, such as those occurring in northern latitudes, where summers can be hot (> 35°C) and humid and winters are extremely cold (< −20°C) and dry. We describe the design and prototype manufacturing as it pertains to micro and meso-scale turbines (< 100 kW) in terms of thermodynamic cycle considerations, turbine design, rotor-bearing dynamics, overall system design and scale-up considerations.

Copyright © 2016 by ASME

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