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A comprehensive analysis of energy and exergy characteristics for a natural gas city gate station considering seasonal variations

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  • Olfati, Mohammad
  • Bahiraei, Mehdi
  • Heidari, Setareh
  • Veysi, Farzad

Abstract

Comprehensive energy and exergy analyses are conducted on a City Gate Station (CGS) having nominal capacity of 20,000 SCMH. For this purpose, thermodynamic properties of Natural Gas (NG) fed into the CGS are firstly determined using American Gas Association Equation of State (AGA-8 EOS). Then, a quantitative analysis is carried out to explore magnitude and exact locations of energy/exergy losses as well as exergy destructions. To this end, four different seasonal strategies are regarded. In all strategies, the largest losses occur within the stack. Although from energy viewpoint, the regulator is a high-efficiency equipment, it is found to be the most exergy destructive component in the CGS. Moreover, maximum and minimum exergy losses occur in the winter (15.33 kW) and summer (1.60 kW), respectively. The best performance based on the second law of thermodynamics for the CGS occurs in the winter with exergy efficiency of 77%, whereas the lowest one happens in the summer with exergy efficiency of 69%. The exergy destruction due to pressure drop in filter and pipes are insignificant. The results obtained from this study can be employed as a guide to reduce exergy destruction in the whole CGS with recognition of the main sources of irreversibility.

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  • Olfati, Mohammad & Bahiraei, Mehdi & Heidari, Setareh & Veysi, Farzad, 2018. "A comprehensive analysis of energy and exergy characteristics for a natural gas city gate station considering seasonal variations," Energy, Elsevier, vol. 155(C), pages 721-733.
    • Handle: RePEc:eee:energy:v:155:y:2018:i:c:p:721-733
    DOI: 10.1016/j.energy.2018.05.069
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    1. Olfati, Mohammad & Bahiraei, Mehdi & Nazari, Saeed & Veysi, Farzad, 2020. "A comprehensive assessment of low-temperature preheating process in natural gas pressure reduction stations to better benefit from solar energy," Energy, Elsevier, vol. 209(C).
    2. Li, Chenghao & Zheng, Siyang & Chen, Yufeng & Zeng, Zhiyong, 2021. "Proposal and parametric analysis of an innovative natural gas pressure reduction and liquefaction system for efficient exergy recovery and LNG storage," Energy, Elsevier, vol. 223(C).
    3. Olfati, Mohammad & Bahiraei, Mehdi & Veysi, Farzad, 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, Elsevier, vol. 173(C), pages 598-609.
    4. Mostafavi, Seyed Alireza & Shirazi, Mohammad, 2020. "Thermal modeling of indirect water heater in city gate station of natural gas to evaluate efficiency and fuel consumption," Energy, Elsevier, vol. 212(C).
    5. Mirzaei, Danesh & Behbahaninia, Ali & Abdalisousan, Ashkan & Miri Lavasani, Seyed Mohammadreza, 2023. "A novel approach to repair time prediction and availability assessment of the equipment in power generation systems using fuzzy logic and Monte Carlo simulation," Energy, Elsevier, vol. 282(C).
    6. Alizadeh, Araz & Ghadamian, Hossein & Aminy, Mohammad & Hoseinzadeh, Siamak & Khodayar Sahebi, Hamed & Sohani, Ali, 2022. "An experimental investigation on using heat pipe heat exchanger to improve energy performance in gas city gate station," Energy, Elsevier, vol. 252(C).

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