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Keywords: efficiency
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Proceedings Papers

Proc. ASME. GT2024, Volume 3B: Combustion, Fuels, and Emissions, V03BT04A025, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-128007
... the injectors did not occur. Measured engine system efficiency was not impacted by the addition of hydrogen. Mixing performance tests for the injectors showed that the fuel and air were well mixed prior to combustion, consistent with the single digit NOx ppm levels measured. The study indicates that addition...
Proceedings Papers

Proc. ASME. GT2024, Volume 4: Controls, Diagnostics, and Instrumentation, V004T05A010, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-122824
... are consistent, precise and reliable. Engine performance charts such as Combustion efficiency, Compressor efficiency, Turbine efficiency, Thermal cycle, Compressor map, Turbine map, Brayton cycle are presented instantaneously while the engine runs. Based on these real-time parameters and charts, compressor surge...
Proceedings Papers

Proc. ASME. GT2024, Volume 4: Controls, Diagnostics, and Instrumentation, V004T05A051, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-129316
... Abstract Short-duration facilities, with testing time on the order of milliseconds to seconds, offer cost-effective solutions to achieve engine-relevant pressure and temperature ratios. Short-duration facilities have high levels of heat loss that require careful accounting for efficiency...
Proceedings Papers

Proc. ASME. GT2024, Volume 5: Cycle Innovations, V005T06A010, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-124972
... cooling technology. Results were analyzed at the optimistic and realistic PGC loss scenarios. For the PGC open cycle, with optimistic combustor losses, efficiency was higher than Joule at all operating conditions. However, with realistic combustor losses, a higher TIT was found to alleviate some...
Proceedings Papers

Proc. ASME. GT2024, Volume 6: Education; Electric Power; Energy Storage; Fans and Blowers, V006T08A001, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-121044
... around safety, reliability, emissions, and operability are discussed to provide context around existing asset capability. hydrogen gas turbine efficiency emissions demonstration Proceedings of ASME Turbo Expo 2024 Turbomachinery Technical Conference and Exposition GT2024 June 24-28, 2024...
Proceedings Papers

Proc. ASME. GT2024, Volume 5: Cycle Innovations, V005T06A034, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-128734
..., including head changes and efficiencies, are extracted both at a component and system level. Leakage flow rates of 27.6% and up to 92.9% of the overall pump flow rate are recorded at design and lowest flow points respectively. The head loss in the mid to low flow rates does not exceed 4.5...
Proceedings Papers

Proc. ASME. GT2024, Volume 6: Education; Electric Power; Energy Storage; Fans and Blowers, V006T08A002, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-123486
..., and some potential solutions to those issues with system control updates. hydrogen gas turbine efficiency emissions modeling control Proceedings of ASME Turbo Expo 2024 Turbomachinery Technical Conference and Exposition GT2024 June 24-28, 2024, London, United Kingdom GT2024-123486 HYDROGEN...
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...