Global ETD Search
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Showing 1 to 13 of 13 for “"Exergetic efficiency"”.
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Development and assessment of integrated powering systems with alternative fuel choices for clean transportation
… of 38 MW, with 43.4% and 52% energetic and exergetic efficiency, respectively, under cruising conditions. However, the maximum power of SOFC-turbofan is 48MW, including 7.3 MW of turbofan power, 39.8 MW of thrust energy, and 0.94 MW of the SOFC. The overall energetic and exergetic …
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Investigations on Latent Thermal Energy Storage for Concentrating Solar Power
… energy density and the high Rankine cycle efficiency owing to the isothermal operation of latent thermal energy storage (LTES) system. Storing heat in the form of latent heat of fusion of a phase change material (PCM), in addition to sensible heat, significantly increases the energy …
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Modeling and Multi-Objective Optimization of the Helsinki District Heating System and Establishing the Basis for Modeling the Finnish Power Network
… functions for costs, emissions, and the exergetic efficiency. A fuel cost sensitivity analysis is conducted on the system by considering ten combinations of fuel costs based on high, medium, and low prices for each fuel. The solution sets, called Pareto fronts, are evaluated by …
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Exergetic Analysis Of Hydrogen Combustion Involving Electronically Excited Species
… of the study identify an optimal range of exergetic efficiency when NTP composes between 0% - 20% of the oxidizer for a stoichiometric fuel-oxidizer ratio. Beyond 25% there is a dramatic reduction in the total exergy destruction before ignition. Additionally, the presence of NTP reduces the …
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Energy, exergy and exergoeconomic analyses of gas-turbine based systems
… inlet air temperature, on the overall operating efficiency of the system. Through this study, the overall plant energetic and exergetic efficiencies are increased by 20% and 12% respectively with cooling down the compressor inlet temperature to 10oC. Furthermore, exergy and exergoeconomic …
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Analysis and optimization of fuel cell based integrated powering systems for clean rail applications
… power outputs capabilities and energetic and exergetic efficiencies. Next, parametric studies on each of the proposed integrated fuel cell systems are provided to have a deeper understanding of the operation of these systems under various conditions. This understanding can help us in the …
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A detailed study of desalination exergy models and their application to a semi-conductor ultra-pure water plant
… available in the search for industrial energy efficiency. The objective of this research was to develop an approach for the exergy analysis of Semiconductor UPW plants in an effort to characterise energy consumption. However, following an extensive literature review, it became evident that …
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Development, analysis and performance assessment of net zero energy house systems.
… of the building, proper insulation, high-efficiency windows, natural ventilation and other techniques are used to curb down heat transfer from and to the building. These robust energy measures combined with using highly efficient domestic appliances, lighting fixtures, seasonal …
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Saturation curve analysis of humidification-dehumidification desalination systems and analysis of reversible ejector performance
The limitations upon the efficiency of humidification-dehumidification (HDH) desalination systems are investigated. Secondly, ejector technologies are analyzed as a means of powering desalination systems thermally. Thermal desalination systems offer advantages over membrane technologies in terms of …
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Exergy Analysis of Pulverized Coal-Fired Ultra Supercritical Power Plants
… analyze the stability of the system is known as exergetic analysis. This research deals mainly with the exergy analysis of coal-fired power plants operating in ultra supercritical conditions. The main steam conditions used for the model development are 750oC temperature and 35 MPa pressure. The …
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Hybrid solar thermoelectric systems utilizing thermosyphons for bottoming cycles
… performance. In addition, the HSTE system efficiency, which included the electrical efficiency of the thermoelectric and the exergetic efficiency of the bottoming cycle waste heat, was investigated for temperatures of 300 K - 1200 K, solar concentrations of 1 - 100 Suns, and different …
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Thermodynamics-based optimization and control of integrated energy systems
… accurately capture the objectives (performance, efficiency, etc.) for the system in terms of desired decision variables. The aim of this research is to develop a systematic methodology for developing objective functions to be used in conjunction with optimal control algorithms for improving …
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A generation-integrated energy storage system for steam power plant
… forms of storage. This means a high effective (exergetic) round-trip efficiency can be achieved at low cost. Specifically, this thesis focuses on the integration of thermal energy storage with the feedwater heating system of steam plant. (In modern energy systems this is likely to be …