A Novel Low-Pressure Release Method Based on Inlet Regulation for Users with Low Demand Scenario
Publication: Journal of Pipeline Systems Engineering and Practice
Volume 14, Issue 4
Abstract
Due to the mismatch between gas production and consumption in the gas delivery system (GDS), reduced customer demand can easily lead to overpressure and gas release. Companies mainly use high-pressure release (HPR) to lower the GDS pressure, which results in significant energy losses for compression and gas separation. This paper (1) proposes a low-pressure release method (LPR) for users’ low-demand scenarios to avoid regulating air separation units, and (2) provides a way for obtaining optimal parameters for LPR when used alone and together with HPR. LPR released low-pressure gas by lowing the compressor inlet guide vane opening (IGA) or the inlet valve opening to reduce the compressor load, outlet pressure, and GDS pressure, and reduce the energy consumption of the compressor. Case studies showed LPR reduced effectively the gas emissions and compressor operating energy. When LPR is used alone, the maximum reduction in gas emissions and compressor operating energy consumption compared with HPR was and , accounting for 62.96% and 2.18%, respectively, and the gas emission rate was reduced from 0.11% to 0.04%. When LPR was used together with HPR, 43.88% oxygen emissions and 0.28% total compressor energy consumption were reduced, and the total conditioning time can be effectively reduced from 42 to 10 min. The method increases the ability of the compressor to regulate the GDS.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This work was supported by the National Key Research and Development Program of China (No. 2018YFB0606104).
References
Chen, X., W. Chu, H. Zhang, and X. Li. 2019. “Numerical study on inlet angle of guide vane in recess vaned casing treatment.” Aerosp. Sci. Technol. 93 (Oct): 105323. https://doi.org/10.1016/j.ast.2019.105323.
Curadelli, O. 2011. “Seismic reliability of spherical containers retrofitted by means of energy dissipation devices.” Eng. Struct. 33 (9): 2662–2667. https://doi.org/10.1016/j.engstruct.2011.05.015.
Ebrahimi, A., M. Meratizaman, H. Akbarpour Reyhani, O. Pourali, and M. Amidpour. 2015. “Energetic, exergetic and economic assessment of oxygen production from two columns cryogenic air separation unit.” Energy 90 (Oct): 1298–1316. https://doi.org/10.1016/j.energy.2015.06.083.
Fernández, D., C. Pozo, R. Folgado, G. Guillén-Gosálbez, and L. Jiménez. 2017. “Multiperiod model for the optimal production planning in the industrial gases sector.” Appl. Energy 206 (Nov): 667–682. https://doi.org/10.1016/j.apenergy.2017.08.064.
Fulin, K., L. Yuxin, L. Tong, L. Wang, and Q. Yinan. 2021. “Energy saving benefit analysis of the compressor short-stop adjustment method based on TGNET.” ACS Omega 6 (44): 29921–29931. https://doi.org/10.1021/acsomega.1c04404.
He, X., Y. Liu, A. Rehman, and L. Wang. 2021. “A novel air separation unit with energy storage and generation and its energy efficiency and economy analysis.” Appl. Energy 281 (Jan): 1–17. https://doi.org/10.1016/j.apenergy.2020.115976.
Hundy, G. F., A. R. Trott, and T. C. Welch. 2016. “Compressors.” In Chap. 4 in Refrigeration, air conditioning and heat pumps. 5th ed., edited by G. F. Hundy, A. R. Trott, and T. C. Welch, 59–87. Oxford, UK: Butterworth-Heinemann.
Jianxin, Q. 2020. “Optimization practice of oxygen supply system in a steel enterprise.” [In Chinese.] Energy Metall. Ind. 39 (Mar): 46–48.
Kelley, M. T., R. C. Pattison, R. Baldick, and M. Baldea. 2018. “An MILP framework for optimizing demand response operation of air separation units.” Appl. Energy 222 (Jul): 951–966. https://doi.org/10.1016/j.apenergy.2017.12.127.
Kong, F., Y. Liu, L. Tong, W. Guo, Y. Qiu, and L. Wang. 2022. “Optimization of co-production air separation unit based on MILP under multi-product deterministic demand.” Appl. Energy 325 (Nov): 119850. https://doi.org/10.1016/j.apenergy.2022.119850.
Kong, F.-L., L.-G. Tong, P.-C. Wei, P.-K. Zhang, L. Wang, B. Wu, and E.-J. Chen. 2021. “Optimal scheduling of converter oxygen based on particle swarm optimization.” Chin. J. Eng. 43 (2): 279–288. https://doi.org/10.13374/j.issn2095-9389.2020.04.02.002.
Kopanos, G. M., D. P. Xenos, M. Cicciotti, E. N. Pistikopoulos, and N. F. Thornhill. 2015. “Optimization of a network of compressors in parallel: Operational and maintenance planning—The air separation plant case.” Appl. Energy 146 (May): 453–470. https://doi.org/10.1016/j.apenergy.2015.01.080.
Kumar, P., and C. Kang. 2019. “Sensor fusion based pipeline inspection for the augmented reality system.” Symmetry 11 (10): 1325. https://doi.org/10.3390/sym11101325.
Kurz, R., and K. Brun. 2010. “Assessment of compressors in gas storage applications.” J. Eng. Gas Turbine Power 132 (6): 1–8. https://doi.org/10.1115/1.4000147.
Liu, G., L. Wang, Z. Li, B. Yang, S. Sun, and L. Tong. 2008. “Analysis of the energy-saving efficiency of gas tank used in the oxygen delivery system.” Energy Metall. Ind. 27 (2): 10–12. https://doi.org/10.3969/j.issn.1001-1617.2008.02.003.
Liu, Y., L. Tong, F. Kong, X. He, H. Yang, L. Wang, and Y. Ding. 2021. “An improved ASU distillation process and DIM-LPB method for variable product ratio demand.” Sep. Purif. Technol. 277 (Dec): 119499. https://doi.org/10.1016/j.seppur.2021.119499.
National Bureau of Statistics of China. 2021. “Annual output of industrial products.” Accessed April 4, 2022. https://data.stats.gov.cn/english/easyquery.htm?cn=C01.
Pattison, R. C., C. R. Touretzky, T. Johansson, I. Harjunkoski, and M. Baldea. 2016. “Optimal process operations in fast-changing electricity markets: Framework for scheduling with low-order dynamic models and an air separation application.” Ind. Eng. Chem. Res. 55 (16): 4562–4584. https://doi.org/10.1021/acs.iecr.5b03499.
Piguave, B. V., S. D. Salas, D. De Cecchis, and J. A. Romagnoli. 2022. “Modular framework for simulation-based multi-objective optimization of a cryogenic air separation unit.” ACS Omega 7 (14): 11696–11709. https://doi.org/10.1021/acsomega.1c06669.
Rege, S. U., R. T. Yang, K. Qian, and M. A. Buzanowski. 2001. “Air-prepurification by pressure swing adsorption using single/layered beds.” Chem. Eng. Sci. 56 (8): 2745–2759. https://doi.org/10.1016/S0009-2509(00)00531-5.
Singla, R., and K. Chowdhury. 2019. “Comparisons of thermodynamic and economic performances of cryogenic air separation plants designed for external and internal compression of oxygen.” Appl. Therm. Eng. 160 (Sep): 1145025. https://doi.org/10.1016/j.applthermaleng.2019.114025.
Stewart, M. 2016. “4–Piping system components.” In Surface production operations, edited by M. Stewart, 193–300. Boston: Gulf Professional Publishing.
Tomita, I., B. An, and T. Nanbu. 2014. A new operating range enhancement device combined with a casing treatment and inlet guide vanes for centrifugal compressors, In Proc., 11th Int. Conf. on Turbochargers and Turbocharging, 79–87. Sawston, UK: Woodhead Publishing.
Xu, W., L. Tang, and E. N. Pistikopoulos. 2018. “Modeling and solution for steelmaking scheduling with batching decisions and energy constraints.” Comput. Chem. Eng. 116 (Aug): 368–384. https://doi.org/10.1016/j.compchemeng.2018.03.010.
Zhang, P., and L. Wang. 2017. “Optimal shut-down policy for air separation units in integrated steel enterprises during a blast furnace blow-down.” Ind. Eng. Chem. Res. 56 (8): 2140–2149. https://doi.org/10.1021/acs.iecr.6b03999.
Zhang, P., L. Wang, and L. Tong. 2016. “MILP-based optimization of oxygen distribution system in integrated steel mills.” Comput. Chem. Eng. 93 (Oct): 175–184. https://doi.org/10.1016/j.compchemeng.2016.06.015.
Zhang, Z., X. Feng, D. Tian, J. Yang, and L. Chang. 2020. “Progress in ejector-expansion vapor compression refrigeration and heat pump systems.” Energy Convers. Manage. 207 (Mar): 1–38. https://doi.org/10.1016/j.enconman.2020.112529.
Zhao, S., M. Ochoa, L. Tang, I. Lotero, A. Gopalakrishnan, and I. Grossmann. 2019. “Novel formulation for optimal schedule with demand side management in multi-product air separation processes.” Ind. Eng. Chem. Res. 58 (8): 3104–3117. https://doi.org/10.1021/acs.iecr.8b04964.
Zhou, D., K. Zhou, L. Zhu, J. Zhao, Z. Xu, Z. Shao, and X. Chen. 2017. “Optimal scheduling of multiple sets of air separation units with frequent load-change operation.” Sep. Purif. Technol. 172 (Jan): 178–191. https://doi.org/10.1016/j.seppur.2016.08.009.
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© 2023 American Society of Civil Engineers.
History
Received: Dec 9, 2022
Accepted: May 18, 2023
Published online: Sep 11, 2023
Published in print: Nov 1, 2023
Discussion open until: Feb 11, 2024
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