Diagnosis of Combined Cycle Power Plant Based on Thermoeconomic Analysis: A Computer Simulation Study

Oh, Hoo-Suk; Lee, Youngseog; Kwak, Ho‐Young

doi:10.3390/e19120643

Cited by 16 publications

(13 citation statements)

References 24 publications

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“…It should be noted that the lost work rate due to the entropy generation plays as "product" in the exergy-balance of the component, while the lost cost flow rate plays as "consumed resources" in the cost-balance equation. This concept is very important in the research area of thermoeconomic diagnosis [18,[26][27][28].…”

Section: Discussionmentioning

confidence: 99%

“…MOPSA has been proved as very useful and powerful method in the exergy and thermoeconomic analysis of large and complex thermal systems such as a geothermal district heating system for buildings [15] and a high-temperature gas-cooled reactor coupled to a steam methane reforming plant [16]. Furthermore, the MOPSA can provide the interaction between the components in the power plant through the entropy flows [17] and a reliable diagnosis tool to find faulty components in power plants [18].…”

Section: Exergy-balance and Cost Balance Equationsmentioning

confidence: 99%

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Exergetic Costs for Thermal Systems

Kwak¹,

Uysal²

2018

Application of Exergy

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Exergy costing to estimate the unit cost of products from various power plants and refrigeration system is discussed based on modified-productive structure analysis (MOPSA) method. MOPSA method provides explicit equations from which quick estimation of the unit cost of products produced in various power plants is possible. The unit cost of electricity generated by the gas-turbine power plant is proportional to the fuel cost and inversely proportional to the exergetic efficiency of the plant and is affected by the ratio of the monetary flow rate of non-fuel items to the monetary flow rate of fuel. On the other hand, the unit cost of electricity from the organic Rankine cycle power plant with heat source as fuel is proportional to the unit cost of heat and the ratio of the monetary flow rate of non-fuel items to the generated electric power, independently. For refrigeration system, the unit cost of heat is proportional to the consumed electricity and inversely proportional to the coefficient of performance of the system, and is affected by the ratio of the monetary flow rate of non-fuel items to the monetary flow rate of consumed electricity.

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Section: Discussionmentioning

confidence: 99%

Section: Exergy-balance and Cost Balance Equationsmentioning

confidence: 99%

Exergetic Costs for Thermal Systems

Kwak¹,

Uysal²

2018

Application of Exergy

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“…As can be seen in Equation 6, a single unit cost is assigned to the specific exergy, regardless of the type of exergy stream or the state of the stream. Applying the cost-balance equation given in Equation 6to each component, Equation 6can be rewritten as follows [26]:…”

Section: Modified Productive Structure Analysis (Mopsa)mentioning

confidence: 99%

Role of Waste Cost in Thermoeconomic Analysis

Uysal

Kwak

2020

Entropy

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Power plants or thermal systems wherein products such as electricity and steam are generated affect the natural environment, as well as human society, through the discharging of wastes. The wastes from such plants may include ashes, flue gases, and hot water streams. The waste cost is of primary importance in plant operation and industrial ecology. Therefore, an appropriate approach for including waste cost in a thermoeconomic analysis is essential. In this study, a method to take waste cost into account in thermoeconomics to determine the production cost of products via thermoeconomic analysis is proposed. The calculation of the waste cost flow rates at the dissipative units and their allocation to system components are important to obtain the production cost of a plant.

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“…Operating parameters of the gas turbine process at each characteristic operating point, Figure 1 and Figure 2, before and after a major maintenance are found in [35]. Table 1 presents the gas turbine process operating parameters before a major maintenance and Table 2 presents the gas turbine process operating parameters after a major maintenance.…”

Section: Operating Parameters Of the Gas Turbine Process Before And Amentioning

confidence: 99%

Analysis of Gas Turbine Operation before and after Major Maintenance

Mrzljak,

Anđelić,

Lorencin

et al. 2019

JMTS

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This paper presents an analysis of the gas turbine real process (with all losses included) before and after a major maintenance. The analysis of both gas turbine operating regimes is based on data measured during its exploitation. Contrary to authors’ expectations, the major maintenance process did not result either in any decrease in losses or increase in efficiencies for the majority of the gas turbine components. However, the major maintenance influenced positively the gas turbine combustion chambers (reduction in losses and increase in the combustion chambers efficiency). After the major maintenance, the overall process efficiency decreased from 43.796% to 41.319% due to a significant decrease in the air mass flow rate and to an increase in the fuel mass flow rate in combustion chambers. A decrease in the gas turbine produced cumulative and useful power after a major maintenance also increased the specific fuel consumption.

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Diagnosis of Combined Cycle Power Plant Based on Thermoeconomic Analysis: A Computer Simulation Study

Cited by 16 publications

References 24 publications

Exergetic Costs for Thermal Systems

Exergetic Costs for Thermal Systems

Role of Waste Cost in Thermoeconomic Analysis

Analysis of Gas Turbine Operation before and after Major Maintenance

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