On the exergy analysis of power plants

Verkhivker, Gennady M.; Kosoy, Boris

doi:10.1016/s0196-8904(00)00170-9

Cited by 64 publications

(25 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In recent years, the use of exergy analysis in thermal design has been discussed and demonstrated by numerous authors (Cengel and Boles, 1998;Jones and Dugan, 1996;Moran and Shapiro, 2000;Verkhivker and Kosoy, 2001). …”

Section: Introductionmentioning

confidence: 99%

Exergetic analysis of gas turbine plants

Ebadi¹,

Gorji-Bandpy²

2005

IJEX

View full text Add to dashboard Cite

An exergetic analysis was performed for a 116-MW gas-turbine power plant. Mass and energy conservation laws were applied to each component of the system. Quantitative exergy balance for each component and for the whole system was considered. In this study, the exergy of a material stream is decomposed into thermal, mechanical and chemical exergy and an entropy-production flow. The effect of a change in the inlet turbine temperature on the exergetic efficiency and exergy destruction in the plant was evaluated. The crucial dependency of the exergetic efficiency and the exergy destruction on the change in the turbine inlet temperature was confirmed.

show abstract

Section: Introductionmentioning

confidence: 99%

Exergetic analysis of gas turbine plants

Ebadi¹,

Gorji-Bandpy²

2005

IJEX

View full text Add to dashboard Cite

show abstract

“…More complex optimization methods based on exergoenergetic analyses are also the focus of researchers. Exergoeconomic theory combines the second law of thermodynamics [14] with economic principles in order to consider the cost of thermodynamic imperfections (losses) in the total cost of running a power plant [15]. In recent years, interest in the exergoeconomic optimization of power-plant operation has grown, including cogeneration systems [16] and systems with renewable energy sources [17].…”

Section: Introductionmentioning

confidence: 99%

Novel method for determining optimal heat-exchanger layout for heat recovery steam generators

Čehil

Katulić

Schneider

2017

Energy Conversion and Management

View full text Add to dashboard Cite

a b s t r a c tA new method for determining the optimal heat-exchanger layout in a heat recovery steam generator and its operating parameters are presented in this paper. A robust mathematical model is developed, where arbitrary steam-pressure levels and steam-reheating levels can be set. The method considers all the possible heat-exchanger layouts, in both serial and parallel arrangements of steam pressure levels or steam reheating levels. The maximum thermodynamic efficiency of the steam-turbine cycle is set as the objective function. The results show that the optimal high pressure in heat recovery steam generator without reheating is in the region of subcritical pressures, whereas that for a heat recovery steam generator with reheating is in the region of supercritical pressures. In the case of similar water or steam temperature profiles in the heat exchangers of different steam pressure levels or reheating level, from a thermodynamic viewpoint, it is justified to use a parallel heat-exchanger arrangement.

show abstract

“…It is true that, since the 50s, a significant research activity has been carried out and that, in some applications, also exergy efficiency of a nuclear power plant was analyzed. In such works, however, the nuclear reactor was always modelled as a simple black box, taking into account only coolant inlet and outlet temperatures and reactor core thermal power [9,16].…”

Section: Introductionmentioning

confidence: 99%

Exergy Analysis of a PWR Core Heat Transfer

Ferroni¹,

Natale²,

Gatto³

2016

IJHT

View full text Add to dashboard Cite

The exergetic analysis, a thermodynamics methodology that quantifies Exergy losses associated with irreversibility, allows to optimize each stage of a transformation process and thus its overall efficiency. In this contribution, a novel approach to exergetic analysis is applied to energy transformations taking place within the core of a nuclear reactor. To perform such analysis, reference was made to a pressurized lightwater reactor (PWR), modeling heat exchanges between fuel assemblies and coolant fluid in the core by balancing incoming and outgoing mass and energy flows, incoming and outgoing in the reactor. Analysis results are validated through a comparison with actual reactor operating parameters. Main goals of the work -part of a wider ongoing research effort-are to develop the thermo-economic analysis of a PWR nuclear power plant (NPP) to assess the actual cost of the products obtainable downstream of the NPP (electric energy and thermal energy for industrial and civil users, very different products in terms of exergy contents), and to compare such costs those of similar products obtained from conventional thermal power plants.

show abstract

On the exergy analysis of power plants

Cited by 64 publications

References 3 publications

Exergetic analysis of gas turbine plants

Exergetic analysis of gas turbine plants

Novel method for determining optimal heat-exchanger layout for heat recovery steam generators

Exergy Analysis of a PWR Core Heat Transfer

Contact Info

Product

Resources

About