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Proceedings Papers

Development of a Low-Pressure Section for Industrial Power Generation Application

Lorenzo Arcangeli, Antonio Aquilino, Filippo Brazzini, Lorenzo Cosi, Nicola Maceli, Sara Rizzi
Proc. ASME. GT2024, Volume 9: Manufacturing Materials and Metallurgy; Microturbines, Turbochargers, and Small Turbomachines; Oil & Gas Applications; Steam Turbine, V009T20A017, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-128909
https://doi.org/10.1115/GT2024-128909
View Paper titled, Development of a Low-Pressure Section for Industrial Power Generation Application
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Topics: Energy generation, Exhaust systems, Pressure, Steam turbines
Journal Articles

Configuration of Organic Rankine Cycles for Geothermal Applications: An Industrial Perspective

Matteo Pettinari, Gnandjuet Gaston Brice Dago, Guido Francesco Frate, Andrea Baccioli, Lorenzo Ferrari, Umberto Desideri, Simone Amidei, Lorenzo Cosi
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. July 2024, 146(7): 071006.
Paper No: GTP-23-1498
https://doi.org/10.1115/1.4064217
Published Online: February 8, 2024
View Article titled, Configuration of Organic Rankine Cycles for Geothermal Applications: An Industrial Perspective
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Topics: Cycles, Fluids, Geothermal engineering, Organic Rankine cycle, Pressure, Temperature, Heat, Flow (Dynamics), Heat exchangers, Economics
Proceedings Papers

Development of a Novel Steam Turbine Low Pressure Section for Variable Speed Application

Jury Auciello, Nicola Maceli, Lorenzo Arcangeli, Lorenzo Cosi
Proc. ASME. GT2023, Volume 10: Steam Turbine, V010T20A021, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-103762
https://doi.org/10.1115/GT2023-103762
View Paper titled, Development of a Novel Steam Turbine Low Pressure Section for Variable Speed Application
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Topics: Pressure, Steam turbines, Design, Turbines, Aerodynamics, Annulus, Energy generation, Flow (Dynamics), Manufacturing, Mechanical drives
Proceedings Papers

Configuration of Organic Rankine Cycles for Geothermal Applications: An Industrial Perspective

Matteo Pettinari, Gnandjuet Gaston Brice Dago, Guido Francesco Frate, Andrea Baccioli, Lorenzo Ferrari, Umberto Desideri, Simone Amidei, Lorenzo Cosi
Proc. ASME. GT2023, Volume 5: Cycle Innovations, V005T06A029, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-103560
https://doi.org/10.1115/GT2023-103560
View Paper titled, Configuration of Organic Rankine Cycles for Geothermal Applications: An Industrial Perspective
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Topics: Economics , Geothermal engineering, Geothermal power, Organic Rankine cycle, Pressure
Proceedings Papers

A Strategy for the Design of ORC Multi-Stage Axial Turbines for Geothermal Energy Conversion

Marco Manfredi, Giacomo Persico, Vincenzo Dossena, Lorenzo Cosi, Annalisa Forte, Lorenzo Arcangeli
Proc. ASME. GT2023, Volume 13B: Turbomachinery — Axial Flow Turbine Aerodynamics, V13BT30A042, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-104116
https://doi.org/10.1115/GT2023-104116
View Paper titled, A Strategy for the Design of ORC Multi-Stage Axial Turbines for Geothermal Energy Conversion
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Topics: Design, Geothermal power, Modeling, Organic Rankine cycle, Turbines
Journal Articles

Techno-Economic Comparison of Several Technologies for Waste Heat Recovery of Gas Turbine Exhausts

Alessandra Ghilardi, Guido Francesco Frate, Andrea Baccioli, Dario Ulivieri, Lorenzo Ferrari, Umberto Desideri, Lorenzo Cosi, Simone Amidei, Vittorio Michelassi
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. May 2023, 145(5): 051006.
Paper No: GTP-22-1467
https://doi.org/10.1115/1.4055872
Published Online: December 20, 2022
View Article titled, Techno-Economic Comparison of Several Technologies for Waste Heat Recovery of Gas Turbine Exhausts
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Topics: Cycles, Organic Rankine cycle, Temperature, Water, Economics , Carbon dioxide, Fluids, Exhaust systems, Turbines, Cascades (Fluid dynamics)
Proceedings Papers

CFD Analysis of the Forces on a Steam Turbine Balance Seal Packing Ring

Cosimo Bianchini, Riccardo Da Soghe, Davide Bertini, Lorenzo Mazzei, Lorenzo Arcangeli, Lorenzo Cosi
Proc. ASME. GT2022, Volume 2: Coal, Biomass, Hydrogen, and Alternative Fuels; Controls, Diagnostics, and Instrumentation; Steam Turbine, V002T20A014, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-82896
https://doi.org/10.1115/GT2022-82896
View Paper titled, CFD Analysis of the Forces on a Steam Turbine Balance Seal Packing Ring
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Topics: Computational fluid dynamics, Packings (Cushioning), Steam turbines
Proceedings Papers

Techno-Economic Comparison of Several Technologies for the Waste Heat Recovery From Gas Turbine Exhausts

Alessandra Ghilardi, Guido Francesco Frate, Andrea Baccioli, Dario Ulivieri, Lorenzo Ferrari, Umberto Desideri, Lorenzo Cosi, Simone Amidei, Vittorio Michelassi
Proc. ASME. GT2022, Volume 4: Cycle Innovations; Cycle Innovations: Energy Storage, V004T06A033, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-83199
https://doi.org/10.1115/GT2022-83199
View Paper titled, Techno-Economic Comparison of Several Technologies for the Waste Heat Recovery From Gas Turbine Exhausts
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Topics: Economics , Gas turbines, Heat recovery, Cycles, Organic Rankine cycle, Rankine cycle, Water, Carbon dioxide, Exhaust systems, Steam
Proceedings Papers

Test Bench for Characterization and Design Against Steam Turbine Fouling

Gabriele Girezzi, Damaso Checcacci, Lorenzo Cosi, Andrea Maggi, Alessandro Sani, Andrea Achilli
Proc. ASME. GT2021, Volume 8: Oil and Gas Applications; Steam Turbine, V008T22A017, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-59685
https://doi.org/10.1115/GT2021-59685
View Paper titled, Test Bench for Characterization and Design Against Steam Turbine Fouling
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Topics: Design, Steam turbines
Proceedings Papers

Numerical Aerodynamic Damping Evaluation of High-Pressure Steam Turbine Blades for Aeromechanical Characterization

Lorenzo Peruzzi, Juri Bellucci, Lorenzo Pinelli, Andrea Arnone, Lorenzo Arcangeli, Lorenzo Cosi, Marco Mazzucco
Proc. ASME. GT2016, Volume 8: Microturbines, Turbochargers and Small Turbomachines; Steam Turbines, V008T26A012, June 13–17, 2016
Publisher: American Society of Mechanical Engineers
Paper No: GT2016-56378
https://doi.org/10.1115/GT2016-56378
View Paper titled, Numerical Aerodynamic Damping Evaluation of High-Pressure Steam Turbine Blades for Aeromechanical Characterization
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Topics: Blades, Damping, High pressure (Physics), Steam turbines, Flutter (Aerodynamics), Stability, Design, Geometry, Shapes
Proceedings Papers

Optimization of a Large Injection System for Steam Turbines

Leonardo Nettis, Enzo Imparato, Lorenzo Cosi
Proc. ASME. GT2015, Volume 8: Microturbines, Turbochargers and Small Turbomachines; Steam Turbines, V008T26A024, June 15–19, 2015
Publisher: American Society of Mechanical Engineers
Paper No: GT2015-43007
https://doi.org/10.1115/GT2015-43007
View Paper titled, Optimization of a Large Injection System for Steam Turbines
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Topics: Optimization, Steam turbines, Flow (Dynamics), Computational fluid dynamics, Pressure, Design, Shapes, Steam, Excitation, Performance
Proceedings Papers

Design and Off-Design Optimization of a Low Pressure Steam Turbine Radial Diffuser Using an Evolutionary Algorithm and 3D CFD

Tom Verstraete, Johan Prinsier, Lorenzo Cosi
Proc. ASME. GT2014, Volume 1B: Marine; Microturbines, Turbochargers and Small Turbomachines; Steam Turbines, V01BT27A046, June 16–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: GT2014-26850
https://doi.org/10.1115/GT2014-26850
View Paper titled, Design and Off-Design Optimization of a Low Pressure Steam Turbine Radial Diffuser Using an Evolutionary Algorithm and 3D CFD
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Topics: Computational fluid dynamics, Design, Diffusers, Evolutionary algorithms, Optimization, Pressure, Steam turbines, Steam, Computation, Exhaust systems
Proceedings Papers

Numerical Analysis of the Unsteady Loads on a Steam Turbine Double Seat Control Valve

Cosimo Bianchini, Riccardo Da Soghe, Lorenzo Cosi, Enzo Imparato
Proc. ASME. GT2014, Volume 1B: Marine; Microturbines, Turbochargers and Small Turbomachines; Steam Turbines, V01BT27A048, June 16–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: GT2014-26982
https://doi.org/10.1115/GT2014-26982
View Paper titled, Numerical Analysis of the Unsteady Loads on a Steam Turbine Double Seat Control Valve
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Topics: Numerical analysis, Steam turbines, Stress, Valves, Flow (Dynamics), Pressure, Steam, Simulation, Computation, Design
Proceedings Papers

Semi–Closed Hat (SC-HAT) Power Cycle

Carlo Carcasci, Lorenzo Cosi, Daniele Fiaschi, Giampaolo Manfrida
Proc. ASME. GT2000, Volume 2: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations, V002T04A006, May 8–11, 2000
Publisher: American Society of Mechanical Engineers
Paper No: 2000-GT-0154
https://doi.org/10.1115/2000-GT-0154
View Paper titled, Semi–Closed Hat (SC-HAT) Power Cycle
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Topics: Thermodynamic power cycles, Cycles, Carbon dioxide, Pressure, Temperature, Water, Compressors, Condensation, Exhaust systems, Low temperature
Proceedings Papers

Design Optimization of a Low Pressure Steam Turbine Radial Diffuser Using an Evolutionary Algorithm and 3D CFD

Tom Verstraete, Johan Prinsier, Alberto Di Sante, Stefania Della Gatta, Lorenzo Cosi
Proc. ASME. GT2012, Volume 6: Oil and Gas Applications; Concentrating Solar Power Plants; Steam Turbines; Wind Energy, 603-613, June 11–15, 2012
Publisher: American Society of Mechanical Engineers
Paper No: GT2012-69515
https://doi.org/10.1115/GT2012-69515
View Paper titled, Design Optimization of a Low Pressure Steam Turbine Radial Diffuser Using an Evolutionary Algorithm and 3D CFD
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Topics: Computational fluid dynamics, Design, Diffusers, Evolutionary algorithms, Optimization, Pressure, Steam turbines, Steam, Turbines, Exhaust systems
Proceedings Papers

Rotor Life Prediction and Improvement for Steam Turbines Under Cyclic Operation

Damaso Checcacci, Lorenzo Cosi, Sanjay Kumar Sah
Proc. ASME. GT2011, Volume 7: Turbomachinery, Parts A, B, and C, 2371-2379, June 6–10, 2011
Publisher: American Society of Mechanical Engineers
Paper No: GT2011-45792
https://doi.org/10.1115/GT2011-45792
View Paper titled, Rotor Life Prediction and Improvement for Steam Turbines Under Cyclic Operation
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Topics: Rotors, Steam turbines, Transients (Dynamics), Combined cycle power stations, Finite element methods, Finite element model, Maintenance, Modeling, Stress, Switches
Proceedings Papers

Aeromechanic Validation of a New Steam Turbine LP Section: Test Major Outcomes

Francesco Piraccini, Roberto Biondi, Lorenzo Cosi
Proc. ASME. GT2010, Volume 6: Structures and Dynamics, Parts A and B, 819-826, June 14–18, 2010
Publisher: American Society of Mechanical Engineers
Paper No: GT2010-22353
https://doi.org/10.1115/GT2010-22353
View Paper titled, Aeromechanic Validation of a New Steam Turbine LP Section: Test Major Outcomes
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Topics: Performance, Steam turbines, Blades, Damping, Pressure, Flow (Dynamics), Q-factor, Rotors, Steam, Strain gages
Proceedings Papers

Design, Manufacturing and Testing of a New Family of Steam Turbine Low Pressure Stages

Lorenzo Cosi, Jonathon Slepski, Steven DeLessio, Michele Taviani, Amir Mujezinovic´
Proc. ASME. POWER2007, ASME 2007 Power Conference, 313-320, July 17–19, 2007
Publisher: American Society of Mechanical Engineers
Paper No: POWER2007-22056
https://doi.org/10.1115/POWER2007-22056
View Paper titled, Design, Manufacturing and Testing of a New Family of Steam Turbine Low Pressure Stages
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Topics: Design, Manufacturing, Pressure, Steam turbines, Testing, Blades, Energy generation, Nozzles, Steam, Turbines