Developing a Model for Predicting the Outlet Gas Temperature of Natural Gas Pressure Reduction Stations to reduce Energy loss

Document Type : Full Lenght Research Article


1 mechanical engineering, semnan azad university, Iran

2 Energy and Sustainable Development Research Center, Semnan Branch, Islamic Azad University, Semnan, Iran

3 Department of mechanical engineering,Semnan Branch, Islamic Azad University,Semnan Iran

4 Islamic Azad University, Semnan Branch


Natural gas stream must be preheated before pressure reduction takes place at natural gas pressure reduction station (PRS). It ensures that the natural gas stream remains above hydrate-formation zone. Heaters are used to prevent this problem. There is no precise method for determining the adjustment points of heaters; and the gas is usually heated to a temperature higher than the required temperature leading to the energy loss in heaters. In the present paper, the outlet gas temperature of regulator was predicted to prevent the energy dissipation by an applied analysis through thermodynamics equations and considering the deviation of natural gas from the ideal gas state using MATLAB software. The prediction of outlet temperature and application of control mechanisms made the temperature close to the standard temperature, so that avoiding the formation of destructive hydrate phenomenon, prevented the dissipation of 7983.7 standard cubic meter of natural gas and reduced 15.29 tone greenhouse gas emissions in a year at the PRS under study. The economic analysis of the proposed system has been carried out using Payback ratio method. The payback period of implementation of this control system is only less than one year. Results of comparison between the measured output temperature and calculated temperature through the software indicated an average difference of 9%.


Main Subjects

[1] Zemansky, M.W., Abbott, M.M. and Van Ness, H.C., 1975. Basic engineering thermodynamics. McGraw-Hill Companies.
[2] Wu, M., Wang, S. and Liu, H., 2007. A study on inhibitors for the prevention of hydrate formation in gas transmission pipeline. Journal of Natural Gas Chemistry, 16(1), pp.81-85.
[3] Gandhidasan, P., Al-Farayedhi, A.A. and Al-Mubarak, A.A., 2001. Dehydration of natural gas using solid desiccants. Energy, 26(9), pp.855-868.
[4] Esmaeilzadeh, F., 2006. Simulation examines ice, hydrate formation in Iran separator centers. Oil & gas journal, 104(11), pp.46-52.
[5] Rojey, A. and Jaffret, C., 1997. Natural gas production, processing, transport, Technip edition.
[6] Katz, C., Cornell, D., Kobayashi, R., Elenbaas, J.R. and Poettmann, F.H., 1959. WEINAUG, Handbook of Natural gas Engineering.
[7] ANSI/API Spec 12K, 1989. Indirect-Type Oil Field Heaters. 4th Edition.
[8] Shateri, M., Ghorbani, S., Hemmati-Sarapardeh, A. and Mohammadi, A.H., 2015. Application of Wilcoxon generalized radial basis function network for prediction of natural gas compressibility factor. Journal of the Taiwan Institute of Chemical Engineers, 50, pp.131-141.
[9] Azizi, N., Rezakazemi, M. and Zarei, M.M., 2019. An intelligent approach to predict gas compressibility factor using neural network model. Neural Computing and Applications, 31(1), pp.55-64.
[10] AGA8-DC92, E., 1992. Compressibility and super compressibility for natural gas and other hydrocarbon gases. Transmission Measurement Committee Report, (8).
[11] Erfani, A., Bahrami, A. and Varaminian, F., 2015. Processes and apparatuses for formation, separation, pelletizing storage and re-gasification of gas hydrate. Journal of Heat and Mass Transfer Research, 2(2), pp.27-35.
[12] Rahbar, N., Shateri, M., Taherian, M. and Valipour, M.S., 2015. 2D Numerical Simulation of a Micro Scale Ranque-Hilsch Vortex Tube. Journal of Heat and Mass Transfer Research, 2(1), pp.39-48.
[13] Falavand Jozaei, A., Tayebi, A., Shekari, Y. and Ghafouri, A., 2017. Numerical simulation of transient natural gas flow in pipelines using high order DG-ADER scheme. Journal of Heat and Mass Transfer Research, 4(1), pp.35-43.
[14] Naderi, M., Ahmadi, G., Zarringhalam, M., Akbari, O. and Khalili, E., 2018. Application of water reheating system for waste heat recovery in NG pressure reduction stations, with experimental verification. Energy, 162, pp.1183-1192.
[15] Zabihi, A. and Taghizadeh, M., 2016. Feasibility study on energy recovery at Sari-Akand city gate station using turboexpander. Journal of Natural Gas Science and Engineering, 35, pp.152-159.
[16] Farzaneh-Gord, M., Ghezelbash, R., Arabkoohsar, A., Pilevari, L., Machado, L. and Koury, R.N.N., 2015. Employing geothermal
S. Rastegar / JHMTR 7 (2020) 143- 154 153
heat exchanger in natural gas pressure drop station in order to decrease fuel consumption. Energy, 83, pp.164-176.
[17] Rezæi, M., Farzaneh-Gord, M., Arabkoohsar, A. and Dasht-bayaz, M.D., 2011, November. Reducing Energy Consumption in Natural Gas Pressure Drop Stations by Employing Solar Heat. In World Renewable Energy Congress-Sweden; 8-13 May; 2011; Linköping; Sweden (No. 057, pp. 3797-3804). Linköping University Electronic Press.
[18] Khosravi, M., Arabkoohsar, A., Alsagri, A.S. and Sheikholeslami, M., 2019. Improving thermal performance of water bath heaters in natural gas pressure drop stations. Applied Thermal Engineering, 159, p.113829.
[19] Ashouri, E., Veysi, F., Shojaeizadeh, E. and Asadi, M., 2014. The minimum gas temperature at the inlet of regulators in natural gas pressure reduction stations (CGS) for energy saving in water bath heaters. Journal of Natural Gas Science and Engineering, 21, pp.230-240.
[20] Rastegar, S., Kargarsharifabad, H., Shafii, M.B. and Rahbar, N., 2020. Experimental investigation of the increasing thermal efficiency of an indirect water bath heater by use of thermosyphon heat pipe. Thermal Science, 24(6B), pp.4277-4287.
[21] Khalili, E., Hoseinalipour, S.M. and Heybatian, E., 2011. Efficiency and heat losses of indirect water bath heater installed in natural gas pressure reduction station; evaluating a case study in Iran. In The 8th National Energy Congress (Vol. 24).
[22] Riahi, M., Yazdirad, B., Jadidi, M., Berenjkar, F., Khoshnevisan, S., Jamali, M. and Safary, M., 2011. Optimization of combustion efficiency in indirect water bath heaters of Ardabil city gate stations. In Seventh Mediterranean Combustion Symposium (MCS-7) (pp. 11-15).
[23] Farzaneh-Gord, M., Arabkoohsar, A., Dasht-bayaz, M.D. and Farzaneh-Kord, V., 2012. Feasibility of accompanying uncontrolled linear heater with solar system in natural gas pressure drop stations. Energy, 41(1), pp.420-428.
[24] Olfati, M., Bahiraei, M., Heidari, S. and Veysi, F., 2018. A comprehensive analysis of energy and exergy characteristics for a natural gas city gate station considering seasonal variations. Energy, 155, pp.721-733.
[25] Olfati, M., Bahiraei, M. and Veysi, F., 2019. A novel modification on preheating process of natural gas in pressure reduction stations to improve energy consumption, exergy destruction and CO2 emission: Preheating based on real demand. Energy, 173, pp.598-609.
[26] Van Wylen, G.J. and Sonntag, R.E., 1967. Fundamentos de termodinámica (No. 536.7).
[27] Sanaye, S. and Nasab, A.M., 2012. Modeling and optimizing a CHP system for natural gas pressure reduction plant. Energy, 40(1), pp.358-369.
[28] Shallcross, D.C., 2008. Psychrometric charts for water vapour in natural gas. Journal of Petroleum Science and Engineering, 61(1), pp.1-8.
[29] H. Ken, Boiler Operator’s Handbook. Fairmont Press, 2004.
[30] Bell, S., 2001. A Beginner’s Guide to Uncertainty of Measurement, Issue 2. Good practice guide, (11).
[31] Kline, S.J., 1953. Describing uncertainty in single sample experiments. Mech. Engineering, 75, pp.3-8.
[32] Dibaei, M. and Kargarsharifabad, H., 2017. New achievements in Fe3O4 nanofluid fully developed forced convection heat transfer under the effect of a magnetic field: An experimental study. Journal of Heat and Mass Transfer Research, 4(1), pp.1-11.
[34] Farzaneh-Gord, M., Pahlevan-Zadeh, M.S., Ebrahimi-Moghadam, A. and Rastgar, S., 2018. Measurement of methane emission into environment during natural gas purging process. Environmental Pollution, 242, pp.2014-2026.
[35] Greenhouse Gases, 2006. Part 1: Specification with Guidance at the Organization Level for Quantification and Reporting of Greenhouse Gas Emissions and Removals. ISO 14064
[36] Van De Vate, J.F., 1997. Comparison of energy sources in terms of their full energy chain emission factors of greenhouse gases. Energy Policy, 25(1), pp.1-6.
[37] Bergman, T.L., Incropera, F.P., Lavine, A.S. and Dewitt, D.P., 2011. Introduction to heat transfer. John Wiley & Sons.
[38] Arnold, K. and Stewart, M., 1999. Surface production operations, Volume 2: Design of gas-handling systems and facilities (Vol. 2). Elsevier.
[39] Esfahani, J.A., Rahbar, N. and Lavvaf, M., 2011. Utilization of thermoelectric cooling in a portable active solar still—an experimental study on winter days. Desalination, 269(1-3), pp.198-205.
[40] Shoeibi, S., Rahbar, N., Esfahlani, A.A. and Kargarsharifabad, H., 2020. Application of simultaneous thermoelectric cooling and heating to improve the performance of a
154 S. Rastegar / JHMTR 7 (2020) 143- 154
solar still: An experimental study and exergy analysis. Applied Energy, 263, p.114581.
[41] Kargar Sharif Abad, H., Ghiasi, M., Mamouri, S.J. and Shafii, M.B., 2013. A novel integrated solar desalination system with a pulsating heat pipe. Desalination, 311, pp.206-210.
[42] Rastegar, S., Kargarsharifabad, H., Rahbar, N. and Shafii, M.B., 2020. Distilled water production with combination of solar still and thermosyphon heat pipe heat exchanger coupled with indirect water bath heater–Experimental study and thermoeconomic analysis. Applied Thermal Engineering, 176,p.115437.