Application of exergy analysis for evaluation of CO2 emission from operation of steam power unit

Stanek, Wojciech; Budnik, M.

doi:10.2478/v10173-010-0030-9

Cited by 4 publications

(4 citation statements)

References 3 publications

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“…The use of exergy analysis also facilitates energy conversions at different stages, promotes efficiency in the system's different components, and reveals the situations where significant losses occur in addition to supporting the prevention of such losses ( Dincer and Cengel, 2001 , Rosen and Bulucea, 2009 ). The validity for exergy analysis areas has also been discussed ( Szargut, 1980 , Stanek and Budnik, 2010 , Pavelka et al, 2015 ). It is a very effective means of assessing energy quality and improving efficiency in complex thermodynamic systems.…”

Section: Introductionmentioning

confidence: 99%

Combined heat and power plant using a multi-objective Henry gas solubility optimization algorithm: A thermodynamic investigation of energy, exergy, and economic (3E) analysis

Sukpancharoen

Prasartkaew

2021

Heliyon

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The principal context of this study was a combined heat and power plant (CHPP) system, with the aim of conducting the multi-objective optimization (MOO) of an energy, exergy, and economic (3E) analysis. To meet rising energy demands, optimal operational conditions for CHPPs are required. Enhancements to plant equipment and improvements in plant design are critical. CHPP design has its basis in the first law of thermodynamics; the losses from such systems are therefore most accurately determined via exergy analysis. Energy quality can also be assessed using exergy analysis. Consequently, it is possible for the designers of thermodynamic systems to apply the findings to achieve improved efficiencies. The economic aspect of CHPP optimization is also critical because the structure is highly complex. This study therefore makes use of a Henry gas solubility optimization (HGSO) algorithm in a CHPP base case situation to achieve MOO. In this particular CHPP system, the respective enthalpy and exergy efficiencies were increased in the case of the boiler (7.22% and 7.21%), the turbogenerator (4.52% and 6.84%), and the condenser (3.06% and 31.37%). In this study, four scenarios are proposed, whereby the design of a heat exchanger network (HEN) aims to optimize energy savings and economic performance through analysis of the profits generated through electricity and steam production. A payback period of around two to three years was reported, where the cost increase under optimal conditions was found to be 0.3824%. The results demonstrate clearly that the tested techniques may be appropriate in practical scenarios when enhancing CHPP performance in the context of the base case.

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Section: Introductionmentioning

confidence: 99%

Combined heat and power plant using a multi-objective Henry gas solubility optimization algorithm: A thermodynamic investigation of energy, exergy, and economic (3E) analysis

Sukpancharoen

Prasartkaew

2021

Heliyon

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“…This method is the most appropriate approach in optimizing cycle by given input data . Exergy analysis and the area of its validity have been also carefully discussed . Since it is powerful method in determining energy quality, makes it possible to enhance efficiency of complicated thermodynamic systems.…”

Section: Introductionmentioning

confidence: 99%

“…27 Exergy analysis and the area of its validity have been also carefully discussed. [28][29][30] Since it is powerful method in determining energy quality, makes it possible to enhance efficiency of complicated thermodynamic systems. Exergy losses can be divided into two parts: avoidable and inevitable.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic and economic analysis of performance evaluation of all the thermal power plants: A review

Ahmadi

Nazari

Sadeghzadeh

et al. 2018

Energy Science & Engineering

104

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Surging in energy demand makes it necessary to improve performance of plant equipment and optimize operation of thermal power plants. Inasmuch as thermal power plants depend on fossil fuels, their optimization can be challenging due to the environmental issues which must be considered. Nowadays, the vast majority of power plants are designed based on energetic performance obtained from first law of thermodynamic. In some cases, energy balance of a system is not appropriate tool to diagnose malfunctions of the system. Exergy analysis is a powerful method for determining the losses existing in a system. Since exergy analysis can evaluate quality of the energy, it enables designers to make intricate thermodynamic systems operates more efficiently. These days, power plant optimization based on economic criteria is a critical problem because of their complex structure. In this study, a comprehensive analysis including energy, exergy, economic (3‐E) analyses, and their applications related to various thermal power plants are reviewed and scrutinized.

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“…To bring about the improvement of the energy efficiency of the crude distillation unit, thermodynamic analysis of the unit is of great relevance. The analysis is based on the second law of thermodynamics rather than the first law and has been applied through exergy analysis and pinch analysis [4]. Exergy analysis is one method of analysis that provides better understanding of a process; quantifies sources of inefficiency [5], distinguishes quality of energy used [6] and allows thermodynamic targets to be defined [7].…”

mentioning

confidence: 99%

Archives of Thermodynamics

Osuolale,

Anozie

2019

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This paper presents the results of thermodynamic analysis of the crude distillation units of two refineries in Nigeria. The analysis was intended to assess the thermodynamic efficiencies of the refineries and proffer methods of improving the efficiencies. Presented results show the atmospheric distillation units of the refineries have 33.3% and 31.6% exergetic efficiencies and 86.5% and 74.6% energetic efficiencies, respectively. Modifications of the operating and feed conditions of the refineries resulted in increased exergetic efficiencies for as much as 62.3% and 38.7% for the refineries. Thermodynamic analysis of the refineries can bring about efficiency improvement and effectiveness of the refineries.

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Application of exergy analysis for evaluation of CO2 emission from operation of steam power unit

Cited by 4 publications

References 3 publications

Combined heat and power plant using a multi-objective Henry gas solubility optimization algorithm: A thermodynamic investigation of energy, exergy, and economic (3E) analysis

Combined heat and power plant using a multi-objective Henry gas solubility optimization algorithm: A thermodynamic investigation of energy, exergy, and economic (3E) analysis

Thermodynamic and economic analysis of performance evaluation of all the thermal power plants: A review

Archives of Thermodynamics

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