ارزیابی انرژی گرمایی اقیانوسی جهت تأمین انرژی الکتریکی سکوهای نفت و گاز فراساحلی دریای خزر

نوع مقاله : پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد، گروه فیزیک دریا، دانشکده منابع طبیعی و علوم دریایی دانشگاه تربیت مدرس، نور، ایران

2 استادیار، گروه فیزیک دریا، دانشکده منابع طبیعی و علوم دریایی دانشگاه تربیت مدرس، نور، ایران

چکیده

تحقیق حاضر با هدف ارزیابی انرژی گرمایی اقیانوسی در مناطق فراساحلی دریای خزر؛ تغییرات قائم دمای آب با استفاده از داده‌های اندازه‏گیری شده دمای مقطع قائم سازمان یونسکو و دمای سطحی آب پایگاه داده‌ای مرکز پیش‌بینی هواشناسی میان‌مدت اروپا (ECMWF, Eropean Center for Medium range Weather Forecasting) و همچنین اندازه‌گیری‏های میدانی مقطع قائم دما در مناطق عمیق حوضه جنوبی دریای خزر بررسی شده است. بر این اساس میانگین اختلاف دمای قائم آب به‌صورت ترموکلاین‌های روزانه، ماهانه، فصلی و دائمی برای داده‏های سازمان یونسکو و اندازه‌گیری‏های میدانی دریای خزر بررسی و امکان استفاده از انرژی گرمایی اقیانوسی در میادین نفت و گاز فراساحلی دریای خزر ارزیابی شده است. یافته‌ها نشان می‌دهند امکان استحصال انرژی گرمایی اقیانوسی تنها در حوضه جنوبی و در ماه‌های جولای آگوست و سپتامبر میسر است به‌طوری‌که قسمت شرقی این حوضه از بیشترین ضریب‌بهره‌وری جهت استحصال انرژی گرمایی برخوردار است. بررسی روزانه دمای سطح آب و اختلاف دما قائم آن با عمق 200 متری دریای خزر در این ماه‌ها نشان می‌دهد که در بهترین شرایط حوضه جنوبی به‌طور میانگین 64 روز از سال امکان استحصال انرژی گرمایی اقیانوسی با حداقل اختلاف دمای 20 درجه سانتی‌گراد را دارد. و تنها میادین سردار‌جنگل، شاه‌دنیز، گانشلی و آذری امکان استحصال این انرژی را به‌طور میانگین به‌ترتیب در 54، 34، 31 و 31 روز از سال دارند.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Evaluation of ocean thermal energy for supplying the electric power of offshore oil and gas platforms

نویسندگان [English]

  • Sajad Zershakian 1
  • Dariush Mansoury 2
1 M.Sc. Student, Department of Physical Oceanography, Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University, Noor, Iran
2 Assistant Professor, Department of Physical Oceanography, Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University, Noor, Iran
چکیده [English]

The Caspian Sea, the world's largest enclosed body of water, covers an area and volume of 371,000 km2 and 87,200 km3, respectively, and limited to the north by Russia and Kazakhstan, to the east by Turkmenistan, to the south by Iran, and to the west by Azerbaijan. The Caspian Sea can be considered the most important source of energy storage, although this focus is currently limited to fossil fuel reserves due to the multitude of offshore oil and gas projects in the North, Middle and South basins, while the potential benefits of renewable energy sources such as Oceanic thermal energy in offshore areas has not been well studied. The present study seeks to evaluate the ocean thermal energy in the offshore regions of the Caspian Sea and examine the vertical variations of water temperature using UNESCO data and ECMWF water surface temperature database. Accordingly, the mean water temperature difference has been investigated as daily, monthly and seasonal across the permanent thermocline for the Caspian Sea using Pyferret software and the possibility of the use of ocean thermal energy in offshore oil and gas fields has been evaluated. In order to show the accuracy of the ERA Interim, Daily database data, its surface water temperature data at 25 points in three Caspian basins were validated according to UNESCO field measurements at those sites. Trends of changes between the Unesco and ECMWF data are in good agreement, including in the eastern part of the Caspian Sea basin, indicating a upwelling phenomenon in this region. In general, ECMWF site surface water temperature data with a correlation coefficient of 0.971 have good accuracy. Therefore, due to the lack of field measurement data, ECMWF site data for Caspian surface water temperature can be used. To study the temperature profile of the Caspian Sea to identify areas where the vertical water temperature difference reaches 20 ° C. First, UNESCO field measurement data covering all three Caspian basins were used. By plotting temperature profiles for 25 UNESCO field measured points only at points A and B, respectively, at geographical locations 37.550 N, 50.692 E, 38.380 N and 51.853 E, the eligible temperature difference for oceanic thermal energy extraction was observed. Examining all points in the deep areas shows that the water temperature reaches 6.5 to 7 ° C at 200 m depth, and at lower depths there is no significant change in water depth. Therefore, the OTEC needs to check the water temperature in the upper layers of water. The findings show that ocean thermal energy can be extracted only from the southern basin during July and September, so that the eastern part of the southern basin has the highest coefficient for thermal energy extraction. Daily monitoring of the vertical variations of water temperature in these months shows that in the best conditions of the southern basin, it is possible to obtain the ocean thermal energy with a minimum temperature of difference 20°C, 64 days a year, and only Sardar, Shahdeniz, Ganeshli and Azeri fields have the possibility of obtaining this energy for 54, 34, 31 and 31 days of the year, respectively.

کلیدواژه‌ها [English]

  • renewable energy
  • Ocean thermal energy
  • Thermocline
  • Oil and gas platforms
  • The Caspian Sea
Amirahmadi, H., 2008, The Caspian Region at a crossroad: challenges of a new frontier of energy and development. UK: Palgrave Macmillan; 320.
Annual Energy Review (AER), 2010, U.S. Energy Information Administration. Available at: http://www.eia.gov/aer/. Accessed October 15, 2011.
Caspian Environment Program (CEP), 2008, General background of the Caspian Sea. Available at: http://www.ssmi.com/qscat/seawinds_data_monthly.html/.
Dumont, H. J., 2008 Aquatic invasions in the Black, Caspian, and Mediterranean seas (nato science series). Kluwer Academic Publisher. US: Kluwer Academic. 314.
Dworsky R. 2006, A warm bath of energy-ocean thermal energy conversion. Available at:https://www.resilience.org/stories/2006-06-05/warm-bath-energy-ocean-thermal-energyconversion.
Gopal, N, 2016, Use of Hywind in Oil and Gas Platforms to Reduce CO2 and NOx Gas Emission. Master Thesis, Retrieved from Technology.
Hussain, A, Arif, S.M. and Aslam, M., 2017, Emerging renewable and sustainable energy technologies: State of the art. Renewable and Sustainable Energy Reviews. 71(C), 12-28. doi: /10.1016/j.rser.2016.12.033.
Kim, N.J., Ng, K.C. and Chun, W. 2009, Using the condenser effluent from a nuclear power plant for Ocean Thermal Energy Conversion [OTEC]. International Communications in Heat and Mass Transfer. 36(10), 1008–1113. doi: 10.1016/j.icheatmasstransfer.2009.08.001.
Kosarev, A. N., 2005, Physico-Geographical Conditions of the Caspian Sea. Springer-Verlag Berlin Heidelberg, Hdb Env Chem, 5, 5-31.
Lewis, A., Estefen, S., Huckerby, J., Musial, W., Pontes, T. and Torres-Martinez, J. 2011, Renewable Energy Sources and Climate Change Mitigation: Special Report of the Intergovernmental Panel on Climate Change. Cambridge: Cambridge University Press; Chapter 6, Ocean Energy.
Malmedal, K., Sen, P. K. and Candelaria, J., 2011, Electrical Energy and the Petro-Chemical Industry: Where are we going?" Paper presented at IEEE 58th Annual Petroleum and Chemical Industry Conference, Toronto, Canada.
Najafi, A., Rezaee, S. and Torabi, F. 2012, Sensitivity Analysis of A Closed Cycle Ocean Thermal Energy Conversion Power Plant. Proceedings of the Renewable Energy and Distributed Generation Confrence; 6-8. doi: 10.1109/ICREDG.2012.6190461.
Oliveira, M. F., Saidel, M. A, Queiroz, A. R. S. and Filho, E. N. 2012, Renewable sources at offshore petroleum and gas production platforms. Paper presented at IEEE 59th Annual Petroleum and Chemical Industry Conference. Chicago USA.
Pelc, R. and Fujita, R.M., 2002, Renewable energy from the ocean. Marine Policy. 26(6), 471–479.
doi:10.1016/S0308-597X (02)00045-3.
Rusu, E. and Onea, F. 2013, Evaluation of the wind and wave energy along the Caspian Sea. Journal of Energy. 50:1-14.
Shiea, M., Nasimi, S. and Valipour, A.,2018, Ocean
thermal energy estimate in the southeastern of
Caspian sea: A numerical study. Indian Journal of
Geo Marine Sciences, 47(8):1581-1586.
Svendsen, H. G., Hadiya, M., Veirød Øyslebø, E. and Uhlen, K., 2011, Integration of offshore wind farm with multiple oil and gas platforms. Proceedings of the IEEE Trondheim PowerTech, Trondheim, Norway.
Twidell, J. and Weir, T., 2006, Renewable Energy Resources. 2nd ed. London (UK): Taylor and Francis, 464.
World Energy Council (WEC), 2009, Survey of Energy Resources Interim Update 2009. London: WEC; 98p.
Zabihian, F. and Fung, A. S., 2011, Review of marine renewable energies: Case study of Iran. Journal of Renewable and Sustainable Energy Reviews. 15, 2461–2474.