Thermodynamics and Energy Systems Analysis

Borel, Lucien; Favrat, Daniel; Nguyen, Dinh Lan; Batato, Magdi

doi:10.1201/b11662

Cited by 24 publications

(39 citation statements)

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“…where _ E þ is the rate of exergy transfer to the system by heat, work, and mass; _ E À is the rate of exergy transfer from the system; and _ L is the rate of exergy destruction [11].…”

Section: Exergy Analysesmentioning

confidence: 99%

Energy and exergy analysis of a micro-compressed air energy storage and air cycle heating and cooling system

Kim

Favrat

2010

Energy

165

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Energy storage systems are becoming more important for load leveling, especially for widespread use of intermittent renewable energy. Compressed air energy storage (CAES) is one of the promising methods for energy storage, but large scale CAES are dependent on the suitable underground geology. Micro-CAES with man-made air vessel is a more adaptable solution for distributed future power networks. In this paper, energy and exergy analyses of the micro-CAES system are performed and to improve the efficiency of the system, some innovative ideas are introduced. The results shows that micro-CAES system could be a very effective system for distributed power networks as a combination of energy storage, generation with various heat sources, and air-cycle heating and cooling system, with a fairly good energy density and efficiency. Quasi-isothermal compression and expansion concepts result in the best exergy efficiencies.

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“…where _ E þ is the rate of exergy transfer to the system by heat, work, and mass; _ E À is the rate of exergy transfer from the system; and _ L is the rate of exergy destruction [11].…”

Section: Exergy Analysesmentioning

confidence: 99%

Energy and exergy analysis of a micro-compressed air energy storage and air cycle heating and cooling system

Kim

Favrat

2010

Energy

165

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“…(3) is defined as the ratio between the power output and the transformation energy [33] received by the system as input, which is computed on the basis of the lower heating value. The latter solves the heat cascade and the energy balance of the plant maximizing the combined generation of heat and power.…”

Section: Methodsmentioning

confidence: 99%

“…According with the general definition and following, the formalism proposed by Favrat and coworkers [33,34], the exergy efficiency is defined as the ratio between the exergy rate delivered by the system and the exergy rate received by the system. The exergy rate delivered by the system consists in the electrical power output.…”

Section: Methodsmentioning

confidence: 99%

Design and Optimization of an Innovative Solid Oxide Fuel Cell–Gas Turbine Hybrid Cycle for Small Scale Distributed Generation

2014

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Distributed power generation and cogeneration is an attractive way toward a more rational conversion of fuel and biofuel. The fuel cell‐gas turbine hybrid cycles are emerging as the most promising candidates to achieve distributed generation with comparable or higher efficiency than large‐scale power plants. The present contribution is devoted to the design and optimization of an innovative solid oxide fuel cell–gas turbine hybrid cycle for distributed generation at small power scale, typical of residential building applications. A 5 kW planar SOFC module, operating at atmospheric pressure, is integrated with a micro gas turbine unit, including two radial turbines and one radial compressor, based on an inverted Brayton cycle. A thermodynamic optimization approach, coupled with system energy integration, is applied to evaluate several design options. The optimization results indicate the existence of optimal designs achieving exergy efficiency higher than 65%. Sensitivity analyses on the more influential parameters are carried out. The heat exchanger network design is performed for an optimal configuration and a complete system layout is proposed. An example of hybrid system integration in a common residential building is discussed.

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“…In order to reveal the nature of losses within the system, an exergy analysis [12] has been performed. Fig.…”

Section: Exergy Analysismentioning

confidence: 99%

Air-Based Bottoming-Cycles for Water-Free Hybrid Solar Gas-Turbine Power Plants

Sandoz¹,

Spelling²,

Laumert³

et al. 2013

Journal of Engineering for Gas Turbines and Power

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A thermoeconomic model of a novel hybrid solar gas-turbine power plant with an airbased bottoming cycle has been developed, allowing its thermodynamic, economic, and environmental performance to be analyzed. Multi-objective optimization has been performed to identify the trade-offs between two conflicting objectives: minimum capital cost and minimum specific CO2 emissions. In-depth thermoeconomic analysis reveals that the additional bottoming cycle significantly reduces both the levelized cost of electricity and the environmental impact of the power plant (in terms of CO2 emissions and water consumption) when compared to a simple gas-turbine power plant without bottoming cycle. Overall, the novel concept appears to be a promising solution for sustainable power generation, especially in water-scarce areas.

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Thermodynamics and Energy Systems Analysis

Cited by 24 publications

References 0 publications

Energy and exergy analysis of a micro-compressed air energy storage and air cycle heating and cooling system

Energy and exergy analysis of a micro-compressed air energy storage and air cycle heating and cooling system

Design and Optimization of an Innovative Solid Oxide Fuel Cell–Gas Turbine Hybrid Cycle for Small Scale Distributed Generation

Air-Based Bottoming-Cycles for Water-Free Hybrid Solar Gas-Turbine Power Plants

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