Comments on Energy Recovery from LNG (Part 2): Evaluation of Process Flowsheets for the Retrofit of an LNG Regasification Facility with a Propane ORC for Power Production
Independent Researcher.
Research Article
Open Access Research Journal of Engineering and Technology, 2026, 11(01), 071–076.
Article DOI: 10.53022/oarjet.2026.11.1.0059
Publication history:
Received on 04 August 2026; revised on 15 August 2026; accepted on 17 August 2026
Abstract:
This article discusses interesting aspects from the article Energy Recovery from LNG (Part 2): Evaluation of Process Flowsheets for the Retrofit of an LNG Regasification Facility with a Propane ORC for Power Production. Four equations to determine the optimum inter-stage pressure and hence the optimum work from the aforementioned article were evaluated using DWSIM 9.0.2 and its internal spreadsheet. The geometric mean pressure equation was evaluated to produce the most consistent results from an inlet pressure range of 51 psia to 601 psia. Additionally, my heat exchanger model, employing Python in DWSIM, was employed to analyze the effect of the number of heat exchanger area intervals on the LNG heat exchanger area. The LNG heat exchanger model in the ORC simulation with 25 equal energy intervals produces a cycle TAE and a mass flowrate with a difference of 2.93 % and 2.37 % compared to a model with 5000 area intervals. The deviation in the heat exchanger areas for the aforementioned area intervals is 33.8 %, but it does not have a significant effect on the TAE. For the evaluated system, the DWSIM heat exchanger with “Pinch Point” as the calculation type produces a good TAE value.
Keywords:
Expander optimum inter-stage pressure and work; Heat exchanger pinch point; LNG; DWSIM
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Copyright © 2026 Author(s) retain the copyright of this article. This article is published under the terms of the Creative Commons Attribution Liscense 4.0