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Exergetic Sustainability Analysis of a Naphtha-Based Combined Cycle Power Plant (CCPP)

  • Research Article-mechanical Engineering
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Arabian Journal for Science and Engineering Aims and scope Submit manuscript

Abstract

In today’s scenario, ensuring sustainability of energy system particularly in the field of power generation is a major concern, and in this regard, exergy analysis is widely accepted tool. For this purpose, first, a comprehensive performance is carried out between two gas turbine plants, i.e., GT2 (case I) and GT1 (case II) using various exergy performance parameters. Further, a comprehensive performance evaluation is carried out between three cases; GT2 (case I), GT1 (case II) and CCPP (case III) using different sustainability indicators such as exergy efficiency, waste exergy ratio, exergy destruction factor and recoverable exergy ratio. Results demonstrate that exergetic sustainability index of combined cycle power plant (CCPP) is 0.45 when compared with GT2 (0.29) and GT1 (0.28). The increased sustainability index is because of the incorporation of a bottoming cycle, which ultimately decreases waste exergy ratio and leads to an increase in exergy efficiency and sustainability index of CCPP.

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Data availability

The data that support the findings of this study are available from [Haldia Petrochemical Limited]. Restrictions apply to the availability of these data, however, it was used under for the current study and so are not publicly available.

Abbreviations

\(c_{p}\) :

Specific heat (\({\text{kJ/kgK}}\))

\(\dot{E}x\) :

Exergy rate (MW)

\({\text{ex}}\) :

Specific exergy (kJ/kg)

\(\dot{Q}\) :

Heat

\(h\) :

Specific enthalpy (kJ/kg)

\(s\) :

Specific entropy (kJ/kgK)

\(I\dot{P}\) :

Exergetic improvement potential rate

\({\text{LHV}}\) :

Lower heating value

cbfs:

Carbon black fluid stock

HRSG:

Heat recovery steam generator

AB:

Auxiliary boiler

BPST:

Back pressure steam turbine

CST:

Condensing steam turbine

rfg:

Residual fuel gas

\(\dot{m}\) :

Mass flow rate (kg/sec)

\(P\) :

Pressure (\({\text{kPa}}\))

\(R\) :

Specific gas constant (kJ/kgK)

\(X\) :

Relative exergy destruction

\(T\) :

Temperature (\({\text{K}}\))

\(\dot{W}\) :

Work rate (MW)

\(x\) :

Chemical component

\(\theta_{{{\text{esi}}}}\) :

Exergetic sustainability analysis

\(\eta\) :

Efficiency

\(a\) :

Air

\({\text{ph}}\) :

Physical

\({\text{ch}}\) :

Chemical

\({\text{dest}}\) :

Destroyed

\(f\) :

Fuel

\(i\) :

Successive number of elements

\({\text{in}}\) :

Inlet

\({\text{out}}\) :

Outlet

\({\text{re}}\) :

Recoverable

\({\text{exd}}\) :

Exergy destruction factor

\({\text{eef}}\) :

Environmental effect factor

\({\text{esi}}\) :

Exergetic sustainability index

\(t\) :

Total

\({\text{we}}\) :

Waste

\(u\) :

Useful

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Acknowledgements

In the present work, a detailed exergetic sustainability analysis of naphtha-based CCPP has been carried out. For this, a comprehensive performance evaluation is carried out between three cases; GT2 (case I), GT1 (case II) and CCPP (case III) using different sustainability indicators such as exergy efficiency, waste exergy ratio, exergy destruction factor and recoverable exergy ratio. For carrying out this work, the author acknowledges Haldia Petrochemicals Limited for providing actual data from the control unit of a power plant.

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Authors and Affiliations

  1. School of Energy Science and Engineering, IIT Kharagpur, Kharagpur, West Bengal, 721302, India

    S. Arpit

  2. Department of Mechanical Engineering, IIT Kharagpur, Kharagpur, West Bengal, 721302, India

    P. K. Das & S. K. Dash

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Correspondence to S. Arpit.

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Appendix

Appendix

See Table 7.

Table 7 Thermophysical properties of streams in CCPP
Full size table

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Arpit, S., Das, P.K. & Dash, S.K. Exergetic Sustainability Analysis of a Naphtha-Based Combined Cycle Power Plant (CCPP). Arab J Sci Eng 48, 11741–11753 (2023). https://doi.org/10.1007/s13369-022-07548-0

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