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Proceedings Papers

Proc. ASME. GT2023, Volume 12: Supercritical CO2, V012T28A031, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-104173
... Abstract Heat pumps are one of the most energy efficient ways to supply heat and have traditionally used hydrofluorocarbons (HFCs) as refrigerants. HFCs, due to their high Global Warming Potential (GWP) are gradually being phased out globally and are being replaced by ultra-low GWP natural...
Proceedings Papers

Proc. ASME. GT2023, Volume 13B: Turbomachinery — Axial Flow Turbine Aerodynamics, V13BT30A039, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-103860
... Abstract Efficiency is an essential metric for assessing turbine performance. Modern turbines rely heavily on numerical computational fluid dynamic (CFD) tools for design improvement. With more compact turbines leading to lower aspect ratio airfoils, the influence of secondary flows...
Proceedings Papers

Proc. ASME. GT2023, Volume 6: Education; Electric Power; Energy Storage; Fans and Blowers, V006T08A007, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-102660
... of the influence hydrogen has on gas turbine combustion and specifically the impact of hydrogen blending with natural gas on a large, modern high efficiency combined cycle power plant. Results of the testing provide needed and positive information on near-term and future energy transition needs. The results...
Proceedings Papers

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
... Abstract The polytropic efficiency is the best quality measure for compressing or expanding engines for compressible fluids. Compressor- and gas-turbine 1D cycle performance simulation methods use it preferably. In steam expanding engine simulation the isentropic efficiency definition...
Proceedings Papers

Proc. ASME. GT2022, Volume 10C: Turbomachinery — Design Methods and CFD Modeling for Turbomachinery; Ducts, Noise, and Component Interactions, V10CT32A023, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-82080
... Abstract Compressor performance prediction is still one of the significant interests in the turbomachinery research field. The two critical parameters for compressor design are adiabatic efficiency and stability margin. The Spalart-Allmaras (SA) turbulence model and modified SA models...
Proceedings Papers

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
... the reciprocating steam engines until around 1930 with the exception of steam locomotives and some other niche applications. Up to now in steam cycle technology mostly the isentropic efficiency definition for expansion is used. Such numbers depend both on the dissipation and on the pressure ratio. In history...
Proceedings Papers

Proc. ASME. GT2022, Volume 3A: Combustion, Fuels, and Emissions, V03AT04A042, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-81643
... addition. If flashback were occurring, the emissions levels would be expected to be significantly higher. The results also demonstrate that added hydrogen to the fuel does not have a statistically significant impact on overall system efficiency. In general, the results show that the injectors can withstand...
Proceedings Papers

Proc. ASME. GT2022, Volume 4: Cycle Innovations; Cycle Innovations: Energy Storage, V004T06A031, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-83003
.... combined cycles power-to-X flexibility cogeneration power-to-hydrogen power-to-ammonia efficiency Proceedings of ASME Turbo Expo 2022 Turbomachinery Technical Conference and Exposition GT2022 June 13-17, 2022, Rotterdam, The Netherlands GT2022-83003 MARKET OPPORTUNITIES FOR POWER-TO-X SOLUTIONS...
Proceedings Papers

Proc. ASME. GT2022, Volume 5: Education; Electric Power; Fans and Blowers, V005T09A003, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-81807
... Abstract The current thermal performance of advanced gas turbines (J class) leads to combined cycle efficiencies exceeding 62%. Such results were achieved by making the gas turbines bigger, i.e., above 350 MW (larger air flow), and by increasing the firing temperature. However, a very...
Proceedings Papers

Proc. ASME. GT2022, Volume 5: Education; Electric Power; Fans and Blowers, V005T09A002, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-81802
... Abstract Modern heavy duty industrial gas turbines in combined cycle configuration, with rated efficiencies (at ISO base load) above 60% net LHV, are expected to play a significant role in reducing the carbon footprint of utility scale electricity generation. Even without post-combustion...
Proceedings Papers

Proc. ASME. GT2021, Volume 2A: Turbomachinery — Axial Flow Fan and Compressor Aerodynamics, V02AT31A035, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-59589
... describes the process of gas-dynamic modernization, development, optimization, stability margins; efficiency. modernization of a 16-stage axial compressor of an industrial gas turbine unit. Tests of the baseline variant of the compressor NOMENCLATURE revealed a significant shortfall of efficiency, pressure...
Proceedings Papers

Proc. ASME. GT2021, Volume 2C: Turbomachinery — Design Methods and CFD Modeling for Turbomachinery; Ducts, Noise, and Component Interactions, V02CT34A036, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-59867
... Abstract This work will demonstrate how the Energy Recovery Inc. (ERI) engineering team improved the efficiency of a multistage pump by about 10% at the first stage, which translated into a 3% increase in the overall multistage pump efficiency; according to a set of engineering calculations...
Proceedings Papers

Proc. ASME. GT2020, Volume 2B: Turbomachinery, V02BT33A012, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-14674
... Abstract This paper presents the computational methodology, and experimental investigations accomplished to enhance the efficiency of a turbine stage by applying non-axisymmetric profiling on the rotor hub wall. The experimental setup was a two-stage axial turbine, which was tested at “LISA...
Proceedings Papers

Proc. ASME. GT2020, Volume 2A: Turbomachinery, V02AT32A042, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-15055
... process. It is well known that the evaporative cooling increases thermodynamic cycle efficiency and thus improves the fuel economy. A relatively unexplored area, however, is the entropy generation due to water phase change as well as the balance between the corresponding entropy yield and the savings from...
Proceedings Papers

Proc. ASME. GT2020, Volume 2D: Turbomachinery, V02DT38A014, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-14900
... of multi-stage axial compressors using 3D CFD modeling and commercial optimization programs as the main tools was developed. The basic parameters of the compressor (efficiency, pressure ratio, mass flow rate, etc.) can be improved using the created method correcting the shape of the blade profiles...
Proceedings Papers

Proc. ASME. GT2013, Volume 4: Ceramics; Concentrating Solar Power Plants; Controls, Diagnostics and Instrumentation; Education; Electric Power; Fans and Blowers, V004T10A002, June 3–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GT2013-94157
... of general design recommendations originates from this work, whereas the optimization loops would need to be repeated for other cooling module types. locomotive cooling fan guide vanes optimization CFD efficiency acoustics sound noise 1 Copyright © 2013 by ASME AERODYNAMIC AND ACOUSTIC...
Proceedings Papers

Proc. ASME. GT2010, Volume 7: Turbomachinery, Parts A, B, and C, 1937-1949, June 14–18, 2010
Publisher: American Society of Mechanical Engineers
Paper No: GT2010-22666
... 11 01 2011 Today an increasing need for gas turbines with extremely low flow rates can be noticed in many industrial sectors, e.g. power generation, aircraft or automotive turbo chargers. For any application it is essential for the turbine to operate at best possible efficiency...
Proceedings Papers

Proc. ASME. GT2010, Volume 5: Industrial and Cogeneration; Microturbines and Small Turbomachinery; Oil and Gas Applications; Wind Turbine Technology, 495-506, June 14–18, 2010
Publisher: American Society of Mechanical Engineers
Paper No: GT2010-23149
... 11 01 2011 The heat transfer occurring within a turbocharger is closely coupled to the internal combustion exhaust. This process is highly complex and it is not taken account either in the choice of components nor is it reflected in the efficiency maps. In particular the flow within...
Proceedings Papers

Proc. ASME. GT2008, Volume 6: Turbomachinery, Parts A, B, and C, 2329-2338, June 9–13, 2008
Publisher: American Society of Mechanical Engineers
Paper No: GT2008-50503
... with the available experimental data. The second volute studied is the one used for a mixed flow turbine in the turbocharger test rig at Imperial College. In this part of the study, the interest is focused on the influence of the volute inlet flow conditions on its performance (efficiency, exit flow angle, etc...
Proceedings Papers

Proc. ASME. GT2003, Volume 3: Turbo Expo 2003, 359-369, June 16–19, 2003
Publisher: American Society of Mechanical Engineers
Paper No: GT2003-38772
... Proceedings of ASME Turbo Expo 2003 Power for Land, Sea, and Air June 16 19, 2003, Atlanta, Georgia, USA according to the anticipated design objectives of the five cases. Adv betw wor bas 33% stud gain ope com des the INT rang ther dev syst inte rob high level of component efficiencies up...