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Thermodynamic Modeling of Allam Cycle

[+] Author Affiliations
Najmus S. Sifat, Yousef Haseli

Central Michigan University, Mount Pleasant, MI

Paper No. IMECE2018-88079, pp. V06AT08A024; 5 pages
doi:10.1115/IMECE2018-88079
From:
  • ASME 2018 International Mechanical Engineering Congress and Exposition
  • Volume 6A: Energy
  • Pittsburgh, Pennsylvania, USA, November 9–15, 2018
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5207-1
  • Copyright © 2018 by ASME

abstract

Deterioration of environment caused by the release of harmful greenhouse gases (mainly CO2) from the power plants has become an area of growing concern. At the present, various methods are being investigated for capturing and storing CO2. Current technologies require a huge amount of energy leading to reduction in overall efficiency. The introduction of Allam cycle, which uses high pressurized super critical CO2 as working fluid has added a new dimension to solve this problem. This is an innovative oxy-fuel power cycle which ensures a near zero emission through inherent capture of all CO2. This paper concentrates on performance modeling of an Allam cycle. The effects of various input parameters are analyzed for achieving highest efficiency. Performance of each component in the cycle is investigated separately and combined therefore to get the overall performance of the cycle. The impact of using an ASU without intercooling and then supplying the high temperature outlet gases except oxygen to the recuperator is investigated. Although, a high power is consumed within ASU, the overall energy requirement decreases as extra energy becomes available in the recuperator to preheat the recycled CO2. An efficiency of 55% is predicted for the cycle.

Copyright © 2018 by ASME
Topics: Modeling , Cycles

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