A PROPER SELECTION OF HOT AND COLD UTILITIES IN A PLANT CONTAINING MULTIPLE HEAT EXCHANGER NETWORKS

Abstract

In this paper, the hot and cold utilities of a complex natural gas refinery containing multiple heat exchanger networks (HENs) were properly selected. Following using pinch analysis for designing the HENs of the natural gas refinery, this selection could be done by considering available utilities in the plant under consideration. The plant network was divided into the five heat exchanger networks for better and precise estimation of utility requirements in each smaller network. By comparing the type and temperature level of the utility required in each network, the best utility could be selected, in order to use as the heating and cooling media in the plant network with a considerable reduced operating cost of the system. The results show that in the new network design, there was about 38 and 100% reduction in cooling air and BFW respectively, but 45% increase in cooling water, as cold utilities and almost 64.4, 30.0, 90.9 and 100% reduction in HP steam, LP steam, hot flue gas and electric heater as hot utilities, respectively relative to the existing network.

Keywords

• Practical Pinch Analysis,Heat Exchanger Network,Hot and Cold Utilities,Appropriate Placement Principle

References

1. [1] Aramesh M., Kasaeian A., Pourfayaz F., Wen D. (2017). Energy analysis and shadow modeling of a rectangular type salt gradient solar pond. Solar Energy, 146, 161–171.
2. [2] Kasaeian A., Barghamadi H., Pourfayaz F. (2017). Performance comparison between the geometry models of multichannel absorbers in solar volumetric receivers. Renewable Energy, 105, 1-12.
3. [3] Aghaie M., Mehrpooya M., Pourfayaz F. (2016). Introducing an integrated chemical looping hydrogen production, inherent carbon capture and solid oxide fuel cell biomass fueled power plant process configuration. Energy Conversion and Management, 124, 141–154.
4. [4] Almutairi MF., Bourisli RI. (2017). Optimum Orientation of a Mutually-Shaded Group of Buildings with Respect to External Solar Radiation. Journal of Thermal Engineering, 3(1), 1065-1070.
5. [5] Ahmadi MH., Mehrpooya M., Pourfayaz F. (2016). Thermodynamic and exergy analysis and optimization of a transcritical CO2 power cycle driven by geothermal energy with liquefied natural gas as its heat sink. Applied Thermal Engineering, 109, 640-652.
6. [6] Khir T., Hafdhi F., Ben Yahia A., Ben Braim A. (2017). Exergetic Optimization of Phosphoric Acid Factory Power Plant. Journal of Thermal Engineering, 3 (5), 1428-1441.
7. [7] Ahmadi MH., Mehrpooya M., Pourfayaz F. (2016). Exergoeconomic analysis and Multi objective optimization of performance of a carbon dioxide power cycle driven by geothermal energy with liquefied natural gas as its heat sink. Energy Conversion Management, 119, 422-434.
8. [8] Kemp, Ian C. (2007). Pinch Analysis and Process Integration, A User Guide on Process Integration for the Efficient Use of Energy, Second ed., Elsevier Ltd., UK.

9. [9] Quijera, J.A.; García, A.; Alriols, M.G.; Labidi, “J. (2013). Heat integration options based on pinch and exergy analyses of a thermo solar and heat pump in a fish tinning industrial process. Energy, 55, 23-37.
10. [10] Mehdizadeh Fard, M., Pourfayaz, F., Kasaeian, A.B., Mehrpooya, M. (2017). A Practical Approach to Heat Exchanger Network Design in a Complex Natural Gas Refinery. Journal of Natural Gas Science and Engineering, 40C, 141-158.
11. [11] Khorrammanesh, M., Amidpoura, M., Nasr, M.R.J. (2007). Application of process decomposition in multi-stream plate fin heat exchangers design to use in heat recovery networks. Chemical Engineering and Processing, 46, 941–954.
12. [12] Tabatabaiyan, S., Rohani, A.A., Bahmanpour, H. (2014). Energy recycling in a gas refinery using a thermal exchanger system: The case of Masjed Soleiman gas refinery. European Journal of Experimental Biology, 4(3), 402-406.
13. [13] Kazempour, H., Pourfayaz, F., Mehrpooya, M. (2017). Modeling and multi-optimization of thermal section of Claus process based on kinetic model. Journal of Natural Gas Science and Engineering, 38, 235-244.
14. [14] Kianfar, E., Tayebinejad, E. (2014). Energy Optimization of Ilam Gas Refinery Unit 100 (stabilization) by using HYSYS REFINERY Software. International Research Journal of Applied and Basic Sciences, 8 (9), 1265-1270.
15. [15] Joe, J.M., Rabiu, A.M. (2013). Retrofit of the Heat Recovery System of a Petroleum Refinery Using Pinch Analysis. Journal of Power and Energy Engineering, 1, 47-52.
16. [16] Keshavarzian, S., Verda, V., Colombo, E., Razmjoo, P. (2015). Fuel saving due to pinch analysis and heat recovery in a petrochemical company. Proceedings of ECOS 2015-The 28th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, Pau, France.
17. [17] Hamedni, N., Maddah, R. (2011). Description of Process and Utility Units of South Pars Gas Plants. University of Tehran Press, First Edition, Tehran.
18. [18] Kidnay, A.J., Parrish, W.R. (2006). Fundamentals of Natural Gas Processing, Taylor and Francis Group, CRC Press, NY.
19. [19] Hafeznia H., Pourfayaz F., Maleki A. (2017). An assessment of Iran's natural gas potential for transition toward low-carbon economy. Renewable and Sustainable Energy Reviews, 79, 71-81.
20. [20] Mehdizadeh Fard, M., Pourfayaz, F., Mehrpooya, M., Kasaeian, A.B. (2018). Improving energy efficiency in a complex natural gas refinery using combined pinch and advanced exergy analyses. Applied Thermal Engineering, 137, 341-355.
21. [21] Mehdizadeh Fard, M., Pourfayaz, F. (2018). A simple method for estimating the irreversibly in heat exchanger networks. Energy, 144, 633-646.
22. [22] Mehdizadeh Fard, M., Pourfayaz, F. (2019). Advanced exergy analysis of heat exchanger network in a complex natural gas refinery. Journal of Cleaner Production, 206, 670-687.