Open AccessExergy analysis of the biogas multistage compression process based on Aspen Plus simulation
Author(s) -
Shuai Zou,
Kangchun Li,
Mingyuan Dou,
Jing Yang,
Qing Feng,
Fuchuan Huang,
Lin Chen
Publication year - 2022
Publication title -
chemical industry and chemical engineering quarterly
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.189
H-Index - 26
eISSN - 2217-7434
pISSN - 1451-9372
DOI - 10.2298/ciceq210822006z
Subject(s) - exergy , biogas , compression (physics) , process engineering , process (computing) , compression ratio , isothermal process , exergy efficiency , adiabatic process , environmental science , engineering , waste management , computer science , materials science , mechanical engineering , thermodynamics , physics , composite material , operating system , internal combustion engine
In this study, by taking the compression separation process of a biogas project as a research subject, a multistage compression process was simulated using Aspen Plus software. An exergy analysis of the biogas project was performed under multistage compression as well as adiabatic and isothermal conditions according to the thermodynamic principle. The results showed that during the compression process, the biogas exergy increased with the increase in pressure and correspondently decreased in the interstage cooling process. Further, the compression series increased with the increase in efficiency, but the increase was gradual. The results of the example study of the four-stage compression process are as follows: the process exergy increased by ~83.07 kW, the process exergy efficiency was ~75.56%, and the recovery exergy potential was ~12.6kW. In this study, Aspen Plus was used to analyze the allocation of compression ratios and selection of compression stages within the multistage compression process, which can ultimately help others design efficient multistage compression systems that reduce energy losses.