Thermodynamic and economic comparative analysis of air and steam bottoming cycle

Chmielniak, T.; Czaja, Daniel; Lepszy, S.; Stępczyńska-Drygas, Katarzyna

doi:10.1016/j.energy.2015.04.019

Cited by 18 publications

(18 citation statements)

References 10 publications

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“…Another important factor in the use of heat exchangers in power systems is the pressure drop value. Thermal calculations indicate that if the pressure losses of the order of 5-6% arise either on the gas or air side, the system energy efficiency may decrease by about 1% [2].…”

Section: Introductionmentioning

confidence: 99%

Selection of the air heat exchanger operating in a gas turbine air bottoming cycle

Chmielniak¹,

Czaja²,

Lepszy³

2013

Archives of Thermodynamics

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A gas turbine air bottoming cycle consists of a gas turbine unit and the air turbine part. The air part includes a compressor, air expander and air heat exchanger. The air heat exchanger couples the gas turbine to the air cycle. Due to the low specific heat of air and of the gas turbine exhaust gases, the air heat exchanger features a considerable size. The bigger the air heat exchanger, the higher its effectiveness, which results in the improvement of the efficiency of the gas turbine air bottoming cycle. On the other hand, a device with large dimensions weighs more, which may limit its use in specific locations, such as oil platforms. The thermodynamic calculations of the air heat exchanger and a preliminary selection of the device are presented. The installation used in the calculation process is a plate heat exchanger, which is characterized by a smaller size and lower values of the pressure drop compared to the shell and tube heat exchanger. Structurally, this type of the heat exchanger is quite similar to the gas turbine regenerator. The method on which the calculation procedure may be based for real installations is also presented, which have to satisfy the economic criteria of financial profitability and cost-effectiveness apart from the thermodynamic criteria.

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Section: Introductionmentioning

confidence: 99%

Selection of the air heat exchanger operating in a gas turbine air bottoming cycle

Chmielniak¹,

Czaja²,

Lepszy³

2013

Archives of Thermodynamics

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“…Considering that the air bottoming cycle medium of the gas-air system is characterized by a low heat capacity (which results in considerable dimensions of the air heat exchanger, AHX, [1]), the systems under analysis have a better chance of competing with gas-steam configurations in the small range of the power output capacity of up to about 30 MW. The gas turbine, the data of which are used in the calculations, finds application in commercial gas-steam units and has a power capacity of 25 MW [1,2]. Thermodynamic and economic analysis of a gas-air system whose technological structure includes a GT10 gas turbine is introduced in [3].…”

Section: Introductionmentioning

confidence: 99%

Thermo-economic comparative analysis of gas turbine GT10 integrated with air and steam bottoming cycle

Czaja¹,

Chmielnak²,

Lepszy³

2014

Archives of Thermodynamics

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A thermodynamic and economic analysis of a GT10 gas turbine integrated with the air bottoming cycle is presented. The results are compared to commercially available combined cycle power plants based on the same gas turbine. The systems under analysis have a better chance of competing with steam bottoming cycle configurations in a small range of the power output capacity. The aim of the calculations is to determine the final cost of electricity generated by the gas turbine air bottoming cycle based on a 25 MW GT10 gas turbine with the exhaust gas mass flow rate of about 80 kg/s. The article shows the results of thermodynamic optimization of the selection of the technological structure of gas turbine air bottoming cycle and of a comparative economic analysis. Quantities are determined that have a decisive impact on the considered units profitability and competitiveness compared to the popular technology based on the steam bottoming cycle. The ultimate quantity that can be compared in the calculations is the cost of 1 MWh of electricity. It should be noted that the systems analyzed herein are power plants where electricity is the only generated product. The performed calculations do not take account of any other (potential) revenues from the sale of energy origin certificates.

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“…Xu et al developed a novel concept for predrying configuration for lignite fuel using steam injection, and they asserted the net thermal efficiency could be increased up to 0.3%, which corresponds 0.9 M$ saving per year for a specified power plant studied by them. Chmielniak et al performed economical and thermodynamical examinations of air‐steam cycles for a gas‐turbine power‐generation system. Nadir and Ghenaiet set up three configurations and conducted performance examinations for a steam generator operating with exhaust gas at temperatures between 350°C and 650°C.…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of a mercury-steam combined-energy-generation system (MES)

Gonca

Şahi̇n

2019

Int J Energy Res

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Summary In this study, exergy and thermo‐ecology–based performance analyses of a mercury‐steam combined–energy‐generation system are comprehensively presented. Performance characteristics such as net‐power output, net‐power density, exergy efficiency, exergy destruction, and ecological coefficient of performance have been obtained by developing a novel numerical model. The impacts of the pressures of open feed water heater and steam turbines, temperatures of mercury boiler, and mercury turbines on the performance characteristics have been investigated. The results indicated that the performance characteristics of the system have been remarkably affected by the pressure and temperature variations of the system components.

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Thermodynamic and economic comparative analysis of air and steam bottoming cycle

Cited by 18 publications

References 10 publications

Selection of the air heat exchanger operating in a gas turbine air bottoming cycle

Selection of the air heat exchanger operating in a gas turbine air bottoming cycle

Thermo-economic comparative analysis of gas turbine GT10 integrated with air and steam bottoming cycle

Performance evaluation of a mercury-steam combined-energy-generation system (MES)

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