0
Research Papers: Energy Systems Analysis

Revamping, Energy Efficiency, and Exergy Analysis of an Existing Upstream Gas Treatment Facility

[+] Author and Article Information
Michele Margarone, Stefano Magi

 Eni—Exploration and Production, San Donato Milanese (Mi) 20097, Italy

Giuseppe Gorla, Stefano Biffi, Paolo Siboni

 Tecnomare, Milano 20139, Italy

Gianluca Valenti, Matteo C. Romano, Antonio Giuffrida, Emanuele Negri, Ennio Macchi

 Politecnico di Milano, Milano 20156, Italy

J. Energy Resour. Technol 133(1), 012001 (Mar 15, 2011) (9 pages) doi:10.1115/1.4003627 History: Received June 08, 2010; Revised February 03, 2011; Published March 15, 2011; Online March 15, 2011

Surface oil and gas treatment facilities in service for decades are likely to be oversized due to the natural depletion of their reservoirs. Despite these plants might have been designed modularly, meaning they comprise multiple identical units serving the same task, such units operate often in conditions far from the design. This work analyzes the revamping options of an existing upstream gas facility, chosen because representative of a wide set of plants. It presents a flexible process simulation model, implemented in the HYSYS environment and dynamically linked to an Excel spreadsheet, which includes the performance maps of all turbomachineries and the main characteristics of the investigated modifications. The model may be used to run simulations for various gas input conditions and to predict the performance over 1 year of operation and for different possible future scenarios. The first objective is to assess economically the considered options, which shall be applied only if yielding short return times of the investment since the reservoir is mature. Moreover, all options are appreciated adopting a figure of merit, here defined, that compares the overall energy consumption to the one calculated with state-of-the-art technologies. In addition, exergy and environmental analyses are executed.

FIGURES IN THIS ARTICLE
<>
Copyright © 2011 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Schematic layout of the current gas treatment plant

Grahic Jump Location
Figure 2

Schematic layout of the modified plant employing (i) the heat recovery from the incinerator and (ii) the electric motor substitution for the LP-IP turbine (layout named INC+EM)

Grahic Jump Location
Figure 3

Schematic layout of the modified plant employing (i) the heat recovery from the incinerator, (ii) electric motor substitution for the LP-IP turbine, and (iii) the bottoming Organic Rankine Cycle (INC+EM+ORC)

Grahic Jump Location
Figure 4

Schematic layout of the modified plant employing (i) the heat recovery from the incinerator, (ii) the electric motor substitution for the LP-IP turbine, and (iii) the bottoming simple steam Rankine cycle (INC+EM+SC)

Grahic Jump Location
Figure 5

IP-HP gas turbine digitalized map reporting the output power (kW) as a function of the rotation speed (rpm) for a number of air flow rates (defined as a ratio with respect to the nominal flow rate)

Grahic Jump Location
Figure 6

IP-HP gas turbine digitalized map reporting the efficiency factor (nondimensional) (defined with respect to the nominal efficiency) as a function of the rotation speed (rpm) for a number of air flow rates (defined as a ratio with respect to the design efficiency)

Grahic Jump Location
Figure 7

Payback time of the three revamped layouts for the assessed scenarios (base case, increased purchasing cost of electricity, and increased CO2 allowance)

Grahic Jump Location
Figure 8

Profitability index of the revamped layouts for the assessed scenarios (base case, increased purchasing cost of electricity, and increased CO2 allowance)

Grahic Jump Location
Figure 9

Influence of the WACC on the profitability index for the sole INC+EM+ORC revamped layout

Grahic Jump Location
Figure 10

Carbon dioxide emissions of the current and revamped configuration

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In