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Impact of pressure on the dynamic behavior co2 hydrate slurry during storage process

Abstract : Two-phase fluids are considered as high-performance fluids for secondary refrigeration thanks to high energy density of phase change material (PCM). Nevertheless, one limitation in such system is thermal energy storage dynamic, in particular PCM charging/discharging rate, which depends generally on fluid temperature and flow rate. In the present work, the influence of pressure on the charging/discharging processes of gas hydrates has been studied experimentally using a stirred tank reactor. A model of stirred tank reactor was also developed and validated. The results showed that pressure can be used to adjust gas-hydrate phase-change temperature and consequently to improve charging/discharging time. For the same working conditions (temperature, flow rate, charging time…), the amount of stored energy using gas hydrates at 3 MPa is two times higher than that using water. The model was used to compare gas hydrates slurries to other slurries at ambient pressure.
Keywords : HYDRATE SLURRY
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Submitted on : Saturday, May 16, 2020 - 11:26:17 AM
Last modification on : Tuesday, September 7, 2021 - 3:54:08 PM

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  • HAL Id : hal-02605785, version 1
  • IRSTEA : PUB00053328

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T. Dufour, J. Oignet, Hong-Minh Hoang, Denis Leducq, Anthony Delahaye, et al.. Impact of pressure on the dynamic behavior co2 hydrate slurry during storage process. 11th IIR Conference on Phase Change Materials and Slurries for Refrigeration and Air Conditioning, May 2016, Karlsruhe, Germany. pp.189-197. ⟨hal-02605785⟩

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