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Hans E. Wettstein
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Proceedings Papers

Advanced Polytropic Efficiency and H-S Diagram Application

Hans E. Wettstein
Proc. ASME. GT2023, Volume 6: Education; Electric Power; Energy Storage; Fans and Blowers, V006T07A002, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-101372
https://doi.org/10.1115/GT2023-101372
View Paper titled, Advanced Polytropic Efficiency and H-S Diagram Application
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Topics: Algorithms, Compressors, Condensation, Cycles, Cylinders, Energy dissipation, Engines, Equilibrium (Physics), Flow (Dynamics), Fluids
Proceedings Papers

History of Steam Expansion Machines Seen as Polytropic Efficiency Achievements

Hans E. Wettstein
Proc. ASME. GT2022, Volume 2: Coal, Biomass, Hydrogen, and Alternative Fuels; Controls, Diagnostics, and Instrumentation; Steam Turbine, V002T20A003, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-79398
https://doi.org/10.1115/GT2022-79398
View Paper titled, History of Steam Expansion Machines Seen as Polytropic Efficiency Achievements
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Topics: Machinery, Steam, Steam turbines
Proceedings Papers

Survey of Calculation Methods for Polytropic Efficiencies

Hans E. Wettstein
Proc. ASME. GT2021, Volume 4: Controls, Diagnostics, and Instrumentation; Cycle Innovations; Cycle Innovations: Energy Storage; Education; Electric Power, V004T08A005, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-59967
https://doi.org/10.1115/GT2021-59967
View Paper titled, Survey of Calculation Methods for Polytropic Efficiencies
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Topics: Compression, Computational methods, Fluids, Gases, Pressure, Thermodynamic power cycles, Turbomachinery, Vapors
Proceedings Papers

How Is a Correct GT Combustor Heat Balance Established?

Hans E. Wettstein
Proc. ASME. GT2020, Volume 6: Education; Electric Power, V006T08A001, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-14235
https://doi.org/10.1115/GT2020-14235
View Paper titled, How Is a Correct GT Combustor Heat Balance Established?
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Topics: Combustion chambers, Heat, Fuels, Temperature, Combustion, Methane, Cycles, Condensation, Flow (Dynamics), Gas turbines
Proceedings Papers

Quality Key Numbers of Gas Turbine Combined Cycles

Hans E. Wettstein
Proc. ASME. GT2020, Volume 6: Education; Electric Power, V006T09A002, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-14508
https://doi.org/10.1115/GT2020-14508
View Paper titled, Quality Key Numbers of Gas Turbine Combined Cycles
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Topics: Combined cycles, Gas turbines, Cycles, Exergy, Design, Turbines, Compressors, Cooling, Aerodynamics, Condensation
Proceedings Papers

80 Years Open GT Development in Baden

Hans E. Wettstein
Proc. ASME. GT2019, Volume 3: Coal, Biomass, Hydrogen, and Alternative Fuels; Cycle Innovations; Electric Power; Industrial and Cogeneration; Organic Rankine Cycle Power Systems, V003T08A001, June 17–21, 2019
Publisher: American Society of Mechanical Engineers
Paper No: GT2019-90177
https://doi.org/10.1115/GT2019-90177
View Paper titled, 80 Years Open GT Development in Baden
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Topics: Compressed air, Cycles, Electric power generation, Energy storage, Engineers, Errors, Gas turbines, Helium, Integrated gasification combined cycle power stations, Testing performance
Proceedings Papers

Exergy Loss Considerations in Education for a Turbofan Power Cycle

Hans E. Wettstein
Proc. ASME. GT2018, Volume 6: Ceramics; Controls, Diagnostics, and Instrumentation; Education; Manufacturing Materials and Metallurgy, V006T07A001, June 11–15, 2018
Publisher: American Society of Mechanical Engineers
Paper No: GT2018-75048
https://doi.org/10.1115/GT2018-75048
View Paper titled, Exergy Loss Considerations in Education for a Turbofan Power Cycle
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Topics: Education, Exergy, Thermodynamic power cycles, Turbofans, Cycles, Heat, Simulation, Design, Energy resources, Entropy
Proceedings Papers

Semi-Closed Recuperated Cycle With Wet Compression

Hans E. Wettstein
Proc. ASME. GT2017, Volume 3: Coal, Biomass and Alternative Fuels; Cycle Innovations; Electric Power; Industrial and Cogeneration Applications; Organic Rankine Cycle Power Systems, V003T06A003, June 26–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: GT2017-63375
https://doi.org/10.1115/GT2017-63375
View Paper titled, Semi-Closed Recuperated Cycle With Wet Compression
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Topics: Compression, Cycles, Stress, Compressors, Gas turbines, Temperature, Pressure, Thermal efficiency, Water, Combined cycles
Proceedings Papers

High Pressure Gas Fired Intercooled Semi-Closed Recuperated Cycle

Hans E. Wettstein
Proc. ASME. GT2016, Volume 3: Coal, Biomass and Alternative Fuels; Cycle Innovations; Electric Power; Industrial and Cogeneration; Organic Rankine Cycle Power Systems, V003T06A002, June 13–17, 2016
Publisher: American Society of Mechanical Engineers
Paper No: GT2016-56176
https://doi.org/10.1115/GT2016-56176
View Paper titled, High Pressure Gas Fired Intercooled Semi-Closed Recuperated Cycle
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Topics: Cycles, High pressure (Physics), Pressure, Approximation, Gases, Temperature, Algorithms, Emissions, Energy dissipation, Enthalpy
Proceedings Papers

Polytropic Change of State Calculations With Condensation or Evaporation and its Use for Thermal Power Cycles

Hans E. Wettstein
Proc. ASME. GT2015, Volume 8: Microturbines, Turbochargers and Small Turbomachines; Steam Turbines, V008T26A002, June 15–19, 2015
Publisher: American Society of Mechanical Engineers
Paper No: GT2015-42075
https://doi.org/10.1115/GT2015-42075
View Paper titled, Polytropic Change of State Calculations With Condensation or Evaporation and its Use for Thermal Power Cycles
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Topics: Algorithms, Carbon dioxide, Computational methods, Condensation, Cycles, Energy dissipation, Enthalpy, Equations of state, Equilibrium (Physics), Evaporation
Journal Articles

Polytropic Efficiency Calculations For Gas Turbines

Hans E. Wettstein
Journal: Mechanical Engineering
Publisher: ASME
Article Type: Select Article
Mechanical Engineering. May 2015, 137(05): 56–57.
Paper No: ME-15-MAY-4
https://doi.org/10.1115/1.2015-May-4
Published Online: May 1, 2015
View Article titled, Polytropic Efficiency Calculations For Gas Turbines
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Topics: Equations of state, Gas turbines, Gases, Algorithms, Energy dissipation, High pressure (Physics), Simulation
Proceedings Papers

Polytropic Change of State Calculations

Hans E. Wettstein
Proc. ASME. IMECE2014, Volume 6A: Energy, V06AT07A077, November 14–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2014-36202
https://doi.org/10.1115/IMECE2014-36202
View Paper titled, Polytropic Change of State Calculations
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Topics: Algorithms, Approximation, Carbon dioxide, Compression, Compressors, Energy dissipation, Gas turbines, Gases, Nitrogen, Oxygen
Proceedings Papers

SCRC Technology for Naval Propulsion

Hans E. Wettstein
Proc. ASME. ESDA2014, Volume 2: Dynamics, Vibration and Control; Energy; Fluids Engineering; Micro and Nano Manufacturing, V002T09A002, July 25–27, 2014
Publisher: American Society of Mechanical Engineers
Paper No: ESDA2014-20080
https://doi.org/10.1115/ESDA2014-20080
View Paper titled, SCRC Technology for Naval Propulsion
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Topics: Propulsion, Diesel engines, Thermal efficiency, Gas turbines, Emissions, Fuels, Vibration, Combined cycles, Compressors, Cycles
Journal Articles

The Semiclosed Recuperated Cycle With Intercooled Compressors

Hans E. Wettstein
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. March 2015, 137(3): 032601.
Paper No: GTP-14-1362
https://doi.org/10.1115/1.4028383
Published Online: September 30, 2014
View Article titled, The Semiclosed Recuperated Cycle With Intercooled Compressors
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Topics: Compressors, Cycles, Exergy, Pressure, Temperature, Compression, Heat, Fluids
Proceedings Papers

The Semi-Closed Recuperated Cycle With Intercooled Compressors

Hans E. Wettstein
Proc. ASME. GT2014, Volume 3A: Coal, Biomass and Alternative Fuels; Cycle Innovations; Electric Power; Industrial and Cogeneration, V03AT07A001, June 16–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: GT2014-25134
https://doi.org/10.1115/GT2014-25134
View Paper titled, The Semi-Closed Recuperated Cycle With Intercooled Compressors
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Topics: Compressors, Cycles, Stress, Carbon dioxide, Combined cycles, Combustion gases, Compression, Design, Electricity (Physics), Emissions
Proceedings Papers

Consequential Damage of Blade Failures in Single Shaft Gas Turbines

Hans E. Wettstein
Proc. ASME. GT2013, Volume 7A: Structures and Dynamics, V07AT29A005, June 3–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GT2013-94221
https://doi.org/10.1115/GT2013-94221
View Paper titled, Consequential Damage of Blade Failures in Single Shaft Gas Turbines
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Topics: Blades, Damage, Failure, Gas turbines, Rotors, Design, Engines, Bearings, Risk, Rotation
Proceedings Papers

The Potential of GT Combined Cycles for Ultra High Efficiency

Hans E. Wettstein
Proc. ASME. GT2012, Volume 3: Cycle Innovations; Education; Electric Power; Fans and Blowers; Industrial and Cogeneration, 133-142, June 11–15, 2012
Publisher: American Society of Mechanical Engineers
Paper No: GT2012-68586
https://doi.org/10.1115/GT2012-68586
View Paper titled, The Potential of GT Combined Cycles for Ultra High Efficiency
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Topics: Combined cycles, Compressors, Exergy, Temperature, Cycles, Fuels, Pressure, Combustion, Electric power generation, Gas turbines
Proceedings Papers

Lecture on Gas Turbine Cycle Analysis Aimed at Application to Catalog Data From Commercially Available Machines

Hans E. Wettstein
Proc. ASME. GT2007, Volume 3: Turbo Expo 2007, 475-480, May 14–17, 2007
Publisher: American Society of Mechanical Engineers
Paper No: GT2007-27372
https://doi.org/10.1115/GT2007-27372
View Paper titled, Lecture on Gas Turbine Cycle Analysis Aimed at Application to Catalog Data From Commercially Available Machines
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Topics: Cycles, Gas turbines, Machinery, Students, Education, Feedback, Pressure drop
Proceedings Papers

The Potential of Recuperated Semiclosed CO2 Cycles

Yngvil O. Enge, Manfred Wirsum, Hans E. Wettstein
Proc. ASME. GT2006, Volume 4: Cycle Innovations; Electric Power; Industrial and Cogeneration; Manufacturing Materials and Metallurgy, 349-355, May 8–11, 2006
Publisher: American Society of Mechanical Engineers
Paper No: GT2006-90888
https://doi.org/10.1115/GT2006-90888
View Paper titled, The Potential of Recuperated Semiclosed CO2 Cycles
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Topics: Carbon dioxide, Cycles, High pressure (Physics), Optimization, Pressure, Steam, Temperature, Turbines, Combustion gases, Exhaust systems