Exergetic cost of steam power plant operation

Budnik, M.; Stanek, Wojciech

doi:10.2478/v10173-011-0008-2

Cited by 12 publications

(5 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The major resources that the consumed exergy can be extracted from are energy, raw materials, finished or semi-finished products and byproducts of another sub-system. The general form of the CExC balance equation can be given as (Budnik & Stanek, 2011…”

Section: How Can Exergy Be Linked To Inventory Management?mentioning

confidence: 99%

Exergy analysis for sustainable inventory and logistics systems

Jawad¹

2021

Preprint

View full text Add to dashboard Cite

Inventory systems may be modelled analogously to thermal systems involving multiple flows of capital, labour, energy, and materials among the members of a supply chain. The laws of thermodynamics can be employed to analyze the efficiency of such physical systems by implementing “Exergy Analysis,” a powerful technique which can be used to assess and improve the efficiency of a process, device, and system and to enhance their environmental and economic performance. Traditional exergy analysis methods may not be sufficient for the analysis of certain systems because they do not account for the non-energetic factors such as capital, labour, and environment protection. Extended exergy analysis assigns exergetic equivalents to such non-energetic externalities. Sustainable development is about securing the requirements of today while guarding the needs of future generations. Its target is the improvement of the living styles of humans by protecting their health and environment, and the efficient resources’ consumption while advancing long-term economic growth. In other words, it is the integration of social, environmental, and economic aspects into regulations and policies, which requires actions from everyone on this planet. The production, inventory and logistics of goods have contributed, among other things, towards making our world less sustainable. This thesis, therefore, aims to provide models, methods and decision support tools that can assist in achieving a better level of sustainability through the whole processes of inventory systems. The overall objectives are to analyze the importance of the wise consumptions of physical and human resources in inventory systems. The results of this thesis have significant implications in shifting the “classical” paradigm of inventory systems that are based on the economic performance, which can be measured with financial criteria, such as total costs and profit, to the “non-classical” paradigm that considers the three pillars of sustainable development. The results showed the importance of accounting for the consumed exergy rather than just considering the values in term of monetary units. Computing the exergetic costs can provide more flexibility for managers of supply chains to compute the quantity based on the available resources and not confining this to the capital only.

show abstract

Section: How Can Exergy Be Linked To Inventory Management?mentioning

confidence: 99%

Exergy analysis for sustainable inventory and logistics systems

Jawad¹

2021

Preprint

View full text Add to dashboard Cite

show abstract

“…Obviously, the combined power cycle plants play an important role in the present energy sector. This cycle has a higher thermal efficiency than either of the cycles executed individually so it is of greatest interest of all [2]. Generally, the performance of thermal power plants is evaluated through energy analysis based on the first law of thermodynamics, including thermal efficiency of the simple cycle and combined cycle.…”

Section: Introductionmentioning

confidence: 99%

Archives of Thermodynamics

Bataineh,

Khaleel

2020

View full text Add to dashboard Cite

Efficiency and electrical power output of combined cycle power plants vary according to the ambient conditions. The amount of these variations greatly affects electricity production, fuel consumption, and plant incomes. Obviously, many world countries have a wide range of climatic conditions, which impact the performance of power plants. In this paper, a thermodynamic analysis of an operating power plant located in Jordan is performed with actual operating data acquired from the power plant control unit. The analysis is performed by using first and second laws of thermodynamics. Energy and exergy efficiencies of each component of the power plant system are calculated and the effect of ambient temperature on the components performance is studied. The effects of gas turbine pressure ratio, gas turbine inlet temperature, load and ambient conditions on the combined cycle efficiency, power outputs and exergy destruction are investigated. Energy and exergy efficiencies of the combined cycle power plant are found as 45.29%, and 42.73% respectively when the ambient temperature is 34 • C. Furthermore, it is found that the combustion chamber has the largest exergy destruction rate among the system components. The results showed that 73% of the total exergy destruction occurs in the combustion chamber when the ambient temperature is 34 • C. Moreover, the results show that the second major exergy loss is in HRSC. The results show that the energy and exergy efficiency of the combined cycle power plant decreases as the ambient temperature increases. According to the calculation results, improvement and modification suggestions are presented.

show abstract

“…Identifying the sizes and locations of any deficiencies will assist in modifying or improving the system. The primary analysis and assessment tools used for optimizing thermal energy systems are energy and exergy analysis [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Archives of Thermodynamics

Almutairi¹,

Alhajeri²,

Alenezi³

2019

View full text Add to dashboard Cite

In this work, actual operating data for Sabiya combined cycle power plant located in Kuwait were used to conduct the performance evaluation based on the energetic and exergetic analysis. The proposed system consist of an advanced gas turbine engines, with two triple pressure reheat heat recovery steam generator, and one steam turbine. Three types of primary movers were selected carefully, in order to cover different types, sizes and technologies. The movers are gas turbine engine frame 9FA, LM6000 and GT26. The proposed models have been developed using specialised software and validated with the manufacturer's data featuring a high level of compatibility. The performance of a combined cycle power plant was investigated for different operating conditions. The result shows that the highest exergy destruction takes place in 9FA engine due to high irreversibility in combustion chamber because of low-pressure ratio, which causes low inlet temperature of compressed air to the combustion chamber. The 9FA engine also has the highest exergy loss due to high exhaust gases temperature, which is caused high useful work from a steam turbine. The GT26-reheat gas turbine engine constitute the best choose as primary mover due to low waste exergy, which is equal to 43.93% whereas 9FA and LM6000 equal to 47.27% and 45.17%, respectively. LM6000 aeroderivative gas turbine is considered the second best choice but the combined cycle power plant will consist of a large number of engines compared to other industrial gas turbine engine, and that may increase the number of auxiliary equipment, capital and maintenance cost.

show abstract

Exergetic cost of steam power plant operation

Cited by 12 publications

References 2 publications

Exergy analysis for sustainable inventory and logistics systems

Exergy analysis for sustainable inventory and logistics systems

Archives of Thermodynamics

Archives of Thermodynamics

Contact Info

Product

Resources

About