Thermodynamic and heat transfer analysis of a Liquid Piston Gas Compressor (LPGC)

Seyedehmansoureh Khaljani, Yasser Mahmoudi, Adrian Murphy, John Harrison, David Surplus

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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A Liquid Piston Gas Compressor (LPGC) is a new concept to be deployed in Compressed Air Energy Storage (CAES) systems in order to tackle the challenge of unsteady energy supply by renewable energies such as wind and solar. The LPGC stores the energy as compressed air in the storage tank when renewable energies are available and reuses it when they are not available. This work aims to understand the thermodynamic and heat transfer characteristics of a LPGC system in the comression process. In addition, as LPGC are more efficient while working isothermally, further investigation is undertaken on the use of porous materials in the LPGC to increase the rate of heat transfer from the compressed gas to the porous medium in the compression phase. The porous medium is considered to be a row of narrow parallel plates attached to the top section of the LPGC. The results reveal that the peak air temperature reduces with the introduction of both the five plate (by 16 K) and the nine plate (by 21 K) configurations. Introducing more plates increases the heat transfer between the high-temperature air and the plates and thus increases the plate temperatures. Additionally, by inserting plates, the compression process becomes an isothermal process. Finally, the compression efficiency is used to compare the performance of case studies. The result reveals that there are an optimum number of plates to have the optimum compression efficiency
Original languageEnglish
Title of host publicationThe International Conference on Innovative Applied Energy (IAPE’19): Proceedings
Number of pages8
Publication statusPublished - 01 Apr 2019
EventIAPE’19: International Conference on Innovative Applied Energy - St Cross College, University of Oxford, United Kingdom, Oxford, United Kingdom
Duration: 14 Mar 201915 Mar 2019


ConferenceIAPE’19: International Conference on Innovative Applied Energy
Country/TerritoryUnited Kingdom
Internet address


  • Liquid Piston Gas Compressor (LPGC), Thermodynamic, Heat transfer, Porous media


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