Performance study of a partial gasification pressurized combustion topping gas cycle and split rankine combined cycle: Part I? Energy analysis

De, S. K.; Roy, Dibyendu; Sarkar, Atreyee

doi:10.1002/er.894

Cited by 7 publications

(6 citation statements)

References 10 publications

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“…Biba et al [8] Yoon et al [13] Amundson and Arri [16] Bhattacharya et al [6] Caram and Fuentes [27] Adanez and Labiano [28] Present work…”

Section: Parametersmentioning

confidence: 93%

“…Radial transport and radial temperature gradient were also neglected in that model. De et al [8] studied the effect of design and operating parameter of both gas and steam cycle on the performance of partial gasification, pressured combustion combined power plant using first law. They reported that the efficiency of combined cycle increases significantly with higher pressure ratio.…”

Section: 41mentioning

confidence: 99%

“…The differential equations (2)(3)(4)(5)(6)(7)(8) are solved using an inhouse FORTRAN code using fourth-order Runge-Kutta method. Initial temperatures of coal, gas and steam are set based on the input data.…”

Section: Solution Proceduresmentioning

confidence: 99%

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Mathematical modeling of gasification of high-ash Indian coals in moving bed gasification system

Singh

Raghavan

Sundararajan

2013

Int. J. Energy Res.

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SUMMARY Simulation of gasification of high‐ash Indian coal in an updraft moving bed gasification system is presented in this paper. A steady one‐dimensional numerical model, which takes into account of drying, devolatilization, combustion and gasification processes, is used to solve the mass and energy balances in the gasification system. The results from the model have been validated against the experimental data available in literature for various types of coals. The predicted product gas composition, its calorific value and the exit temperature are in agreement with the reported results. The validated model is used to study the effect of input parameters such as oxygen content in air stream, steam flow rates and the pressure of the gasification system. Results indicate that the value of oxygen mole fraction around 0.42 in the oxidizer stream can provide optimum performance in oxygen‐based gasification systems. There is a range of steam‐to‐coal ratio that is dependent on the oxygen content in oxidizer stream. For air‐based systems, this value is around 0.4 and for oxygen‐based systems it is 1.5. The gasification performance improves with operating pressure significantly. An operating pressure of around 8 bar and higher, based on the application, can be used for achieving the required performance with high‐ash coals. The model is useful for predicting the performance of high‐ash Indian coals in a moving bed gasification system under different operating parameters. Copyright © 2013 John Wiley & Sons, Ltd.

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“…Biba et al [8] Yoon et al [13] Amundson and Arri [16] Bhattacharya et al [6] Caram and Fuentes [27] Adanez and Labiano [28] Present work…”

Section: Parametersmentioning

confidence: 93%

Section: 41mentioning

confidence: 99%

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Mathematical modeling of gasification of high-ash Indian coals in moving bed gasification system

Singh

Raghavan

Sundararajan

2013

Int. J. Energy Res.

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“…The latter is the same range as in the current study. De et al [21] used specific parameters. The enthalpy values for the steam cycle at each state are within the operating range when compared with an existing power plant [22].…”

Section: Validation Of Resultsmentioning

confidence: 99%

Effect of supplementary firing options on cycle performance and CO₂emissions of an IGCC power generation system

Gnanapragasam

Reddy

Rosen

2009

Int. J. Energy Res.

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SUMMARYSupplementary firing is adopted in combined-cycle power plants to reheat low-temperature gas turbine exhaust before entering into the heat recovery steam generator. In an effort to identify suitable supplementary firing options in an integrated gasification combined-cycle (IGCC) power plant configuration, so as to use coal effectively, the performance is compared for three different supplementary firing options. The comparison identifies the better of the supplementary firing options based on higher efficiency and work output per unit mass of coal and lower CO 2 emissions. The three supplementary firing options with the corresponding fuel used for the supplementary firing are: (i) partial gasification with char, (ii) full gasification with coal and (iii) full gasification with syngas. The performance of the IGCC system with these three options is compared with an option of the IGCC system without supplementary firing. Each supplementary firing option also involves pre-heating of the air entering the gas turbine combustion chamber in the gas cycle and reheating of the low-pressure steam in the steam cycle. The effects on coal consumption and CO 2 emissions are analysed by varying the operating conditions such as pressure ratio, gas turbine inlet temperature, air pre-heat and supplementary firing temperature. The results indicate that more work output is produced per unit mass of coal when there is no supplementary firing. Among the supplementary firing options, the full gasification with syngas option produces the highest work output per unit mass of coal, and the partial gasification with char option emits the lowest amount of CO 2 per unit mass of coal. Based on the analysis, the most advantageous option for low specific coal consumption and CO 2 emissions is the supplementary firing case having full gasification with syngas as the fuel.

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“…In the present work, a novel combined cogeneration cycle employing coal gasification in a topping clean coal technology based gas turbine cycle and a bottoming multipressure 'split Rankine' [4] cogeneration cycle has been conceptualized. The idea of generating steam in a heat recovery steam generator (HRSG) at different pressures for use in power generation has already been discussed from the energy and exergy viewpoints in an 'internally coupled' [4] combined power cycle by De et al [17,18] and in an 'externally coupled' [4] cogeneration plant by De and Biswal [19]. It has been found that the performance, both energetically and exergetically, is better for an externally coupled cycle and cogeneration than for an internally coupled cycle and power only option.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic analysis of a coal gasification and split Rankine combined cogeneration plant. Part 1: Energy analysis

Biswal

2005

Proceedings of the Institution of Mechanical Engineers, Part A:

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The aim of this paper is to study the thermodynamic performance of a new combination of a coal gasification topping gas cycle and an ‘externally coupled’, ‘split Rankine’ bottoming steam cycle as a means of advanced clean coal combined cogeneration. Energy analysis of the conceptualized cogeneration scheme is presented in this part of the paper. The effects of the design and operating parameters of both the gas and the steam cycle on the performance of the combined heat and power plant are discussed.

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Performance study of a partial gasification pressurized combustion topping gas cycle and split rankine combined cycle: Part I? Energy analysis

Cited by 7 publications

References 10 publications

Mathematical modeling of gasification of high-ash Indian coals in moving bed gasification system

Mathematical modeling of gasification of high-ash Indian coals in moving bed gasification system

Effect of supplementary firing options on cycle performance and CO₂emissions of an IGCC power generation system

Thermodynamic analysis of a coal gasification and split Rankine combined cogeneration plant. Part 1: Energy analysis

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Performance study of a partial gasification pressurized combustion topping gas cycle and split rankine combined cycle: Part I? Energy analysis

Cited by 7 publications

References 10 publications

Mathematical modeling of gasification of high-ash Indian coals in moving bed gasification system

Mathematical modeling of gasification of high-ash Indian coals in moving bed gasification system

Effect of supplementary firing options on cycle performance and CO2emissions of an IGCC power generation system

Thermodynamic analysis of a coal gasification and split Rankine combined cogeneration plant. Part 1: Energy analysis

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Effect of supplementary firing options on cycle performance and CO₂emissions of an IGCC power generation system