Numerical Investigation on Heat Transfer and Flow Resistance Characteristics of Superheater in Hydrocracking Heat Recovery Steam Generator

Danfeng Zhang, Xin Wang, Liang Zhao, Huaqing Xie, Chen Guo, Feizhou Qian, Hui Dong () and Yun Hu
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Danfeng Zhang: Liaoning Engineering Research Center of Energy Saving and Green Low Carbon Technology for Process Industry, Northeastern University, Shenyang 110819, China
Xin Wang: MODUL (Liaoning) Technology Ltd., Shenyang 110819, China
Liang Zhao: Liaoning Engineering Research Center of Energy Saving and Green Low Carbon Technology for Process Industry, Northeastern University, Shenyang 110819, China
Huaqing Xie: Liaoning Engineering Research Center of Energy Saving and Green Low Carbon Technology for Process Industry, Northeastern University, Shenyang 110819, China
Chen Guo: Liaoning Engineering Research Center of Energy Saving and Green Low Carbon Technology for Process Industry, Northeastern University, Shenyang 110819, China
Feizhou Qian: Suzhou Hailu Heavy Industry Co., Ltd., Suzhou 215600, China
Hui Dong: Liaoning Engineering Research Center of Energy Saving and Green Low Carbon Technology for Process Industry, Northeastern University, Shenyang 110819, China
Yun Hu: Shenyang Academy of Environmental Sciences, Shenyang 110167, China

Energies, 2023, vol. 16, issue 17, 1-15

Abstract: The heat recovery steam generator (HRSG) was utilized to recover the waste heat resources of the catalyst’s regenerated gas with the objective to reduce the energy consumption of the hydrocracking process. In this study, the flow resistance and heat transfer performance of the superheater tube bundles in the hydrocracking HRSG were investigated via numerical simulation. The performance evaluation criterion (PEC 1 ) was applied to characterize the comprehensive heat transfer performance of superheater tube bundles. The results showed that as the transverse tube pitch increased, the Nusselt number ( Nu ) showed a monotonically increasing trend, the Euler number ( Eu ) showed a monotonically decreasing trend, and PEC 1 showed a monotonically increasing trend. As the longitudinal tube pitch increased, Nu exhibited a monotonically increasing trend, Eu showed a monotonically decreasing trend, and PEC 1 showed a monotonically increasing trend. In the scope of the simulated results, as the transverse and longitudinal tube pitches were 110 mm and 95 mm, respectively, PEC 1 reached the maximum value. Compared with the primary structural parameters, PEC 1 increased by 2.32% and 8.50%, respectively. Finally, a new correlation was proposed to predict Nu and Eu of the superheater tube bundles in the hydrocracking HRSG.

Keywords: hydrocracking; superheater; comprehensive heat transfer characteristics; performance evaluation criteria (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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