PDF Publication Title:
Text from PDF Page: 100
APPENDIX Preliminary Design of Ceramic Components for the ST5+ Advanced Microturbine Engine Jun Shi, Venkata R. Vedula, John Holowczak, Connie E. Bird, S. Scott Ochs, Luca Bertuccioli and David J. Bombara United Technologies Research Center, East Hartford, CT ABSTRACT Progress in the preliminary design of an axial vane ring and axial turbine rotor composed of silicon nitride structural ceramics is presented. The silicon nitride components allow for significantly increased turbine inlet temperature in the ST5+, an advanced version of the Pratt & Whitney Canada's ST5, which powers the DTE Technologies ENT400 Distributed Energy Generator. Preliminary aerodynamic and mechanical design, steady state thermal and stress analysis, and life prediction results will be reviewed. Foreign object damage resistance will be compared between ceramic versions of the baseline rotor blade geometry and that developed for the ST5+ engine. INTRODUCTION The demands for fast installation of power generators and easy upgrade of power output have spurred the development of microturbines in the last few years. The California power crisis heightened such demand when power shortages and blackouts disrupted normal business operations and everyday life. The power crisis shook public confidence in electric utilities and forced consumers to rethink alternative, reliable sources of power, such as microturbines. In response to market demand, Pratt & Whitney Canada (P&WC) has teamed up with DTE Energy Technologies to develop and produce a 400 kW microturbine system, the ENT400. The ST5 microturbine is based on P&WC’s PW207 helicopter engine with modifications to suit the needs of industrial power generation. With funding from the US Department of Energy, United Technologies Research Center (UTRC) has been working closely with P&WC to improve major ENT400 performance parameters: electrical efficiency from 30% to 40% or higher and NOx emission from 9ppm to 7ppm or less on natural gas. The efficiency gain comes from a bottoming Organic Rankine Cycle (ORC) and from the use of ceramic components in the engine hot gas path. The ORC makes use of the exhaust gas to heat a low boiling point liquid that drives a second generator and thus recovers some of the energy that is otherwise lost through the stack. By using high-temperature resistant ceramic components, the engine cycle can run hotter with reduced cooling requirements, both contributing to increased cycle efficiency. Figure 1 Baseline ST5 microturbine engine The ST5 (see Figure 1) is a twin shaft engine with separate compressor and power turbine stages. ST5’s single stage radial compressor has a nominal compression ratio of 8:1 and the single stage axial compressor rotor speed is nominally 51,000 rpm. The compressor turbine vane ring and compressor turbine rotor blades are made of single crystal materials to withstand the high temperature gas exiting from the combustor transition duct. The high-temperature combustion gas requires the vane ring to be cooled by compressor discharge air. Although the compressor turbine blades are uncooled, they operate close to their temperature limit. Therefore, an uncooled ceramic vane ring and ceramic turbine rotor could offer substantial cycle benefits. The ST5+ turbine inlet temperature is approximately 1150oC, a substantial increase over that of the baseline ST5 engine. Cycle studies show that an approximate 3% gain in electrical efficiency can be obtained by using ceramic materials [1]. Proceedings of: ASME TURBOEXPO 2002 June 3-6, 2002, Amsterdam, The Netherlands 2002-GT-30547 99 Copyright © 2002 by ASMEPDF Image | ADVANCED MICROTURBINE SYSTEMS Final Report for Tasks 1 Through 4 and Task 6
PDF Search Title:
ADVANCED MICROTURBINE SYSTEMS Final Report for Tasks 1 Through 4 and Task 6Original File Name Searched:
AdvancedMicroturbineSystems_924484.pdfDIY PDF Search: Google It | Yahoo | Bing
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
IT XR Project Redstone NFT Available for Sale: NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Be part of the future with this NFT. Can be bought and sold but only one design NFT exists. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Turbine IT XR Project Redstone Design: NFT for sale... NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Includes all rights to this turbine design, including license for Fluid Handling Block I and II for the turbine assembly and housing. The NFT includes the blueprints (cad/cam), revenue streams, and all future development of the IT XR Project Redstone... More Info
Infinity Turbine ROT Radial Outflow Turbine 24 Design and Worldwide Rights: NFT for sale... NFT for the ROT 24 energy turbine. Be part of the future with this NFT. This design can be bought and sold but only one design NFT exists. You may manufacture the unit, or get the revenues from its sale from Infinity Turbine. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Supercritical CO2 10 Liter Extractor Design and Worldwide Rights: The Infinity Supercritical 10L CO2 extractor is for botanical oil extraction, which is rich in terpenes and can produce shelf ready full spectrum oil. With over 5 years of development, this industry leader mature extractor machine has been sold since 2015 and is part of many profitable businesses. The process can also be used for electrowinning, e-waste recycling, and lithium battery recycling, gold mining electronic wastes, precious metals. CO2 can also be used in a reverse fuel cell with nafion to make a gas-to-liquids fuel, such as methanol, ethanol and butanol or ethylene. Supercritical CO2 has also been used for treating nafion to make it more effective catalyst. This NFT is for the purchase of worldwide rights which includes the design. More Info
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
Infinity Turbine Products: Special for this month, any plans are $10,000 for complete Cad/Cam blueprints. License is for one build. Try before you buy a production license. May pay by Bitcoin or other Crypto. Products Page... More Info
CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com (Standard Web Page)