Document Type : Research Paper

Authors

1 Assistant Professor, Chemistry and Process Engineering Department, Niroo Research Institute, Tehran, Iran

2 Research Assistant, Chemistry and Process Engineering Department, Niroo Research Institute, Tehran, Iran

3 Ph.D Student, School of Chemical Engineering, University of Tehran, Tehran, Iran

Abstract

Flaring of gas often having high heating value results in considerable economic and energy losses in addition to significant environmental impacts. Power generation through combined gas and steam turbine cycles may be considered as a suitable flare gas recovery process. Thermal sea-water desalination is a process that requires a considerable amount of heat; hence it may be used in downstream of power generation cycles. Energy is the largest section of the water generation cost of all desalination processes. The energy cost of thermal distillation sea-water plants is close to 50-60% of water generation costs. In the current study, the generation of power and desalinated water through the gas turbine cycle, steam cycle, and multistage flash (MSF) method using flare gas of cheshmeh khosh are investigated. The economic parameters related to the different scenarios considered for the production of power and water are evaluated in the current research. According to the economic evaluation carried out, the most economically profitable scenarios for the investigated co-generation plant is generating as much as possible power in the steam turbine and using the remaining heat in the low-pressure outlet steam in the MSF desalination process. The results show that by increasing steam turbine outlet pressure from 3 bar to 78 bar, power and water generation is changed from 697 to 581 MW and 1557 to 2109 m3/h, respectively. Also, by increasing the outlet pressure of the steam turbine from 3 to 78 bar, the total capital cost is changed from 1177 to 1192 MUSD, and the operating cost is changed from 117.85 to 117 MUSD/year. Finally, operating profit will decrease from 300 to 50 MUSD/year, and payback time will change from 3.92 to 4.75 years.

Keywords

Main Subjects

Afshar, M. and Rad, H., Advanced Analysis of Dew Point Control Unit of Hybrid Refrigeration Systems in Gas Refineries, Iranian Journal of Oil & Gas Science and Technology, Vol. 7, No. 3, p. 32–52, 2018.
Al-Aboosi, F. Y. and El-Halwagi, M. M., An Integrated Approach to Water-Energy Nexus in Shale-gas Production, Processes, Vol. 6, No. 5, p. 52, 2018.
Alkaisi, A., Mossad, R., and Sharifian-Barforoush, A., A Review of The Water Desalination Systems Integrated with Renewable Energy, Energy Procedia, Vol. 110, p. 268–274, 2017.
Al-Karaghouli, A. and Kazmerski, L. L., Energy Consumption and Water Production Cost of Conventional and Renewable-Energy-Powered Desalination Processes, Renewable and Sustainable Energy Reviews, Vol. 24, p. 343–356, 2013.
Chen, L., Xu, Q., Gossage, J. L., and Lou, H. H., Simulation and Economic Evaluation of a Coupled Thermal Vapor Compression Desalination Process for Produced Water Management, Journal of Natural Gas Science and Engineering, Vol. 36, p. 442–453, 2016.
Dhiantravan, P., Kolbe, R., Lichtor, Sh., Marsiglio., J and Zhuang, E., Desalination-team A-process Design, Retrieved from https://Process design. McCormick, Northwestern.Edu/Index.Php/Desalination_-_Team_A, 2020.
Feng, W., Xiong, H., Wang, W., Duan, X., Yang, T., Wu, C., and Wang, C., Energy Consumption Analysis of Lipid Extraction from Black Soldier Fly Biomass, Energy, Vol. 185, p. 1076–1085, 2019.
Ghadyanlou, F. and Vatani, A., Flare Gas Recovery Methods for Olefin Plants, Chemical Engineering, Vol. 122, No. 5, p. 66–75, 2015.
Glazer, Y. R., Kjellsson, J. B., Sanders, K. T., and Webber, M. E., Potential for Using Energy from Flared Gas for On-Site Hydraulic Fracturing Wastewater Treatment in Texas, Environmental Science & Technology Letters, Vol. 1, No. 7, p. 300–304, 2014.
Hamidzadeh, Z., Sattari, S., Soltanieh, M., and Vatani, A., Development of a Multi-objective Decision-Making Model to Recover Flare Gases in a Multi Flare Gases Zone, Energy, Vol. 203, p. 117–129, 2020.
Heidari, M., Ataei, A., and Rahdar, M. H., Development and Analysis of Two Novel Methods for Power Generation from Flare Gas, Applied Thermal Engineering, Vol. 104, p. 687–696, 2016.
Heidary, B., Tavakoli, T., Ghobadian, B., and Roshandel, R., Performance Analysis of Hybrid Solar-wind RO–MSF Desalination System, Resource-efficient Technologies, Vol. 26, No. 2, p. 1–16, 2019.
Huang, L., Wang, Y., He, R., Kong, X., Lei, S., Liu, Y., and Hu, X., Solar-Driven Co-generation of Electricity and Water by Evaporation Cooling, Desalination, Vol. 488, p. 114–133, 2020.
Jafari, M., Ashtab, S., Behroozsarand, A., Ghasemzadeh, K., Wood, D. A., Plant-Wide Simulation of an Integrated Zero-emission Process to‎ Convert Flare Gas to Gasoline, Gas Processing Journal, Vol. 6, No. 1, 2018.
Jafari, M and Sarrafzadeh, H, Desalinated Water Production from The Sea Water Using Recycled Energy of Flare Gases, 16th National Congress of Iranian Chemical Engineering, Tehran - Amir Kabir University of Technology, 2018.
Kang, M., Mauzerall, D. L., Ma, D. Z., and Celia, M. A., Reducing Methane Emissions from Abandoned Oil and Gas Wells: Strategies and Costs, Energy Policy, Vol. 132, p. 594–601, 2019.
Khalili-Garakani, A., Iravaninia, M., and Nezhadfard, M., A Review on the Potentials of Flare Gas Recovery Applications in Iran, Journal of Cleaner Production, Vol. 279, p. 3–28, 2020.
Khaliq, A., Choudhary, K., and Dincer, I, Energy and Exergy Analyses of Compressor Inlet Air-cooled Gas Turbines Using the Joule—Brayton Refrigeration Cycle. Proceedings of The Institution of Mechanical Engineers, Part A, Journal of Power and Energy, Vol. 223, No. 1, p. 1–9, 2009.
Liponi, A., Wieland, C., and Baccioli, A, Multi-effect Distillation Plants for Small-scale Seawater Desalination: Thermodynamic and Economic Improvement. Energy Conversion and Management, Vol. 205, p. 112–137, 2020.
Liu, Z. and Karimi, I. A., Simulation of a Combined Cycle Gas Turbine Power Plant in Aspen HYSYS, Energy Procedia, Vol. 158, p. 3620–3625, 2019.
Lopez-Echeverry, J. S., Reif-Acherman, S., and Araujo-Lopez, E., Peng–Robinson Equation of State: 40 Years Through Cubics, Fluid Phase Equilibria, Vol. 447, p. 39–71, 2017.
Mabrouk, A. N. and Fath, H. E., Technoeconomic Study of a Novel Integrated Thermal MSF–MED Desalination Technology, Desalination, Vol. 371, p. 115–125, 2015.
Moghadam, N. and Samadi, M., Gas Condensate Stabilization Unit: Different Design Approaches, International Journal of Chemical Engineering and Applications, Vol. 3, No. 6, p. 461, 2012.
Moon, A. S. and Lee, M., Energy Consumption in Forward Osmosis-desalination Compared to Other Desalination Techniques, World Academy of Science, Engineering and Technology, Vol. 65, p. 537–539, 2012.
Naderi, M., Zargar, G., and Khalili, E., A Numerical Study on Using Air Cooler Heat Exchanger for Low Grade Energy Recovery from Exhaust Flue Gas in Natural Gas Pressure Reduction Stations, Iranian Journal of Oil & Gas Science and Technology, Vol. 7, No. 1, p. 93–109, 2018.
Nezhadfard, M. and Khalili-Garakani, A., Power Generation as a Useful Option for Flare Gas Recovery: Enviro-Economic Evaluation of Different Scenarios, Energy, Vol. 204, 117940, 2020.
Nourmohamadi Taemeh, A., Shariati, A., and Khosravi Nikou, M. R., Analysis of Energy Demand for Natural Gas Sweetening Process Using a New Energy Balance Technique, Petroleum Science and Technology, Vol. 36, No. 12, p. 827–834, 2018.
Okullo, A., Tibasiima, N., and Barasa, J., Simulation of Electricity Generation from Biogas for Ugandan Rural Community, American Journal of Chemical Engineering, Vol. 6, No. 3, p. 37–43, 2018.
Pouyfaucon, A. B. and García-Rodríguez, L., Solar Thermal-powered Desalination: A Viable Solution for a Potential Market, Desalination, Vol. 435, p. 60–69, 2018.
Rahimpour, M. R., Jamshidnejad, Z., Jokar, S. M., Karimi, G., Ghorbani, A., and Mohammadi, A. H, A., Comparative Study of Three Different Methods for Flare Gas Recovery of Assaluyeh Gas Refinery, Journal of Natural Gas Science and Engineering, Vol. 4, p. 17–28, 2012.
Sayyaadi, H., Khosravanifard, Y., and Sohani, A., Solutions for Thermal Energy Exploitation from The Exhaust of an Industrial Gas Turbine Using Optimized Bottoming Cycles, Energy Conversion and Management, Vol. 207, p. 200–212, 2020.
Seidi, M., Khezeli, M., Bayati, B., and Najafi, E., The Selection of Amine Solvent in Gas Treating Process Considering Physical and Process Criteria Using Multiple Criteria Decision-making Techniques: A Case Study of Ilam Gas Treating Company, Iranian Journal of Oil & Gas Science and Technology, Vol. 8, No. 3, p. 73–88, 2019.
Song, J., Li, X. S., Ren, X. D., and Gu, C. W., Performance Analysis and Parametric Optimization of Supercritical Carbon Dioxide Cycle with Bottoming Organic Rankine Cycle (ORC), Energy, Vol. 143, p. 406–416, 2018.
Thiel, G. P., Tow, E. W., Banchik, L. D., and Chung, H. W., Energy Consumption in Desalinating Produced Water from Shale Oil and Gas Extraction, Desalination, Vol. 366, p. 94–112, 2015.
Zadakbar, O., Abbassi, R., Khan, F., Karimpour, K., Golshani, M., and Vatani, A., Risk Analysis of Flare Flame-out Condition in a Gas Process Facility, Oil & Gas Science and Technology, Vol. 66, No. 3, p. 521–530, 2011.
Zoeir, A., Tabatabaei Nejad, A., and Khodapanah, E., Impact of H2S Content and Excess Air on Pollutant Emission in Sour Gas Flares, Iranian Journal of Oil & Gas Science and Technology, Vol. 8, No. 1, p. 1–10, 2019.