Exergetic and Exergo-Economical Analyses of a Gas-Steam Combined Cycle System

IF 4.3 3区工程技术 Q1 MECHANICS

Journal of Non-Equilibrium Thermodynamics Pub Date : 2022-09-01 DOI:10.1515/jnet-2022-0042

G. Gonca, Bulent Guzel

引用次数: 11

Abstract

Abstract In this study, the results of an investigation of the performance of a gas-steam combined cycle system (GSCCS) under exergetic and exergo-economical criteria are reported. The effective power (Pef), destroyed exergy (X), efficiency of exergy (ε), unit electric generation cost (Celec) and exergy-dependent economic worth of electrical energy (Cex,elec), which is novelly determined in this study, have been analyzed. The impacts of speed (N), pressure ratio of the gas cycle (λ), equivalence ratio (ϕ), the flow rate of the air mass ( m ˙ a {\dot{m}_{a}}), the flow rate of the fuel mass ( m ˙ f {\dot{m}_{f}}), inlet temperature of the air into the compressor ( T 1 {\mathrm{T}_{1}}), steam temperature ( T 6 {\mathrm{T}_{6}}) and pressure (P6) of the heat exchanger, outlet pressure (P7) of the high pressure steam turbine and condenser pressure (P9) on Pef, ε, Celec and Cex,elec have been parametrically evaluated. It was revealed that the stream and component characteristics of the system have significant influences on the performance characteristics of the GSCCS.

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燃气-蒸汽联合循环系统的火用与火用经济性分析

摘要本文报道了燃气-蒸汽联合循环系统(GSCCS)在火用和火用-经济标准下的性能研究结果。分析了本研究新确定的有效功率(Pef)、破坏用能(X)、用能效率(ε)、单位发电成本(Celec)和电能的用能依赖经济价值(Cex,elec)。速度(N)的影响,压力比气体的循环(λ)等价比率(ϕ),空气的流量质量(m˙{\点{m} _{一}}),燃料的流量质量(m f˙{\点{m} _ {f}}),空气压缩机的入口温度(T 1 {\ mathrm {T} _{1}}),蒸汽温度(T 6 {\ mathrm {T} _{6}})和压力(P6)换热器的出口压力(P7)高压汽轮机的冷凝器压力(P9) Pef,ε,Celec和Cex,elec进行了参数化评价。研究表明，系统的流特性和组件特性对GSCCS的性能特性有显著影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Non-Equilibrium Thermodynamics 物理-力学

CiteScore

9.10

自引率

18.20%

发文量

审稿时长

1 months

期刊介绍： The Journal of Non-Equilibrium Thermodynamics serves as an international publication organ for new ideas, insights and results on non-equilibrium phenomena in science, engineering and related natural systems. The central aim of the journal is to provide a bridge between science and engineering and to promote scientific exchange on a) newly observed non-equilibrium phenomena, b) analytic or numeric modeling for their interpretation, c) vanguard methods to describe non-equilibrium phenomena. Contributions should – among others – present novel approaches to analyzing, modeling and optimizing processes of engineering relevance such as transport processes of mass, momentum and energy, separation of fluid phases, reproduction of living cells, or energy conversion. The journal is particularly interested in contributions which add to the basic understanding of non-equilibrium phenomena in science and engineering, with systems of interest ranging from the macro- to the nano-level. The Journal of Non-Equilibrium Thermodynamics　has recently expanded its scope to place new emphasis on theoretical and experimental investigations of non-equilibrium phenomena in thermophysical, chemical, biochemical and abstract model systems of engineering relevance. We are therefore pleased to invite submissions which present newly observed non-equilibrium phenomena, analytic or fuzzy models for their interpretation, or new methods for their description.