Exergy-Based Efficiency Assessment of Fans vs. Isentropic Efficiency [PDF]
International Journal of Turbomachinery, Propulsion and Power, 2023 The efficiency definition allows us to compare two machines with each other. In general, the efficiency is defined as the ratio of usable power to the required power. This raises the question: what is the usable power?
Johannes Brötz +2 more
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EFFECTS OF ISENTROPIC EFFICIENCY AND ENHANCING STRATEGIES ON GAS TURBINE PERFORMANCE [PDF]
Journal of Mechanical Engineering and Sciences, 2013 Owing to their numerous advantages, gas turbine (GT) power plants have become an important technology for power generation. This paper presents a parametric analysis for different configurations of GT plants, considering the effects of isentropic ...
hamir K. Ibrahim, M.M. Rahman
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ISENTROPIC EFFICIENCY OF CENTRIFUGAL COMPRESSOR WORKING WITH REAL GAS
Acta Polytechnica CTU Proceedings, 2018 The contribution deals with calculation of isentropic efficiency and also with calculation of isentropic process of real gas or gaseous mixtures. The method is based on numerical solution of basic definitional equation of isentropic process and equation ...
Jiří Oldřich
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Exergetic Analysis and Design of a Mechanical Compression Stage—Application for a Cryogenic Air Separation Plant [PDF]
EntropyThis study focuses on the compression area of a cryogenic air separation unit (ASU). The mechanism of exergy consumption in the compressor was revealed. The influence of the compression ratio and of the isentropic efficiency per stage give arguments for ...
Adalia Andreea Percembli (Chelmuș) +4 more
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Detailed analysis of the effect of the turbine and compressor isentropic efficiency on the thermal and exergy efficiency of a Brayton cycle [PDF]
Thermal Science, 2014 Energy and exergy analysis of a Brayton cycle with an ideal gas is given. The irreversibility of the adiabatic processes in turbine and compressor is taken into account through their isentropic efficiencies. The net work per cycle, the thermal efficiency and the two exergy efficiencies are expressed as functions of the four dimensionless ...
Galović, Antun +2 more
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Optimization design of centrifugal impeller based on Bezier surface and FFD space grid parameterization. [PDF]
PLoS ONETo enhance the aerodynamic performance of centrifugal impellers, this study presents an advanced optimization design methodology. This methodology addresses the challenges associated with numerous design variables, inflexible configurations, and low ...
Yesong Wang +4 more
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New Data-Driven Models of Mass Flow Rate and Isentropic Efficiency of Dynamic Compressors
AerospaceDynamic compressors are widely used in many industrial sectors, such as air, land, and marine vehicle engines, aircraft environmental control systems (ECS), air-conditioning and refrigeration, gas turbines, gas compression and injection, etc.
Xiande Fang +4 more
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Carnot cycle in practice: compensating inefficiencies of ORC expanders through thermal regeneration [PDF]
E3S Web of Conferences, 2021 The Organic Rankine Cycle (ORC) is a thermodynamic cycle that can operate with a hot source over a wide range of temperatures, especially with low-grade heat (below 200°C). One of the main limitations for the success of small-scale ORC cycles (few to 100
Lefebvre Lucie +3 more
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Detailed Experimental and Model-Based Analysis of a Swash-Plate Piston Expander for ORC Application
Frontiers in Energy Research, 2020 A 195 cm3 swash-plate piston expander was tested in an ORC using R245fa as working fluid. Rotational speeds ranging from 1,000 to 4,000 RPM and pressure ratios from 7 to 12 were imposed. In total, 65 steady state points were measured.
Jean-François Oudkerk, Vincent Lemort
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Experimental evaluation of isentropic efficiency in turbocharger twin-entry turbines
Journal of Physics: Conference Series, 2022 Abstract Turbocharging plays a fundamental role not only in improving the performance of automotive engines, but also in reducing the fuel consumption and exhaust emissions of spark-ignited biofuel, diesel, liquid, and gaseous engines.
Usai V., Cordalonga C., Marelli S.
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