State-of-the-art of cold energy storage, release and transport using CO2 double hydrate slurry

Yang, Kairan; Chen, Zuozhou; Zhang, Peng

doi:10.1016/j.apenergy.2023.122531

Cited by 6 publications

(2 citation statements)

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“…In addition to the storage of energy gases, gas hydrates can be directly exploited for the storage of energy. In particular, their production for the storage of cold energy is gaining continuously growing attention [36]. Compared with cold storage using water, ice slurries show high energy capacity, with their latent heat being approximately equal to 333 kJ/kg (water) [37].…”

Section: Introductionmentioning

confidence: 99%

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Cold Energy Storage via Hydrates Production with Pure CO2 and CO2/N2 (70/30 and 50/50 vol%) Mixtures: Quantification and Comparison between Energy Stored and Energy Spent

Gambelli,

Rossi,

Gigliotti

2024

Energies

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Gas hydrates represent an attractive opportunity for gas storage. These ice-like structures can be produced both for the final disposal of greenhouse gases such as carbon dioxide in the solid form and for the storage of energy gases, such as methane, propane, and others, with the possibility of reaching energy densities comparable with those of pressurised vessels, but at lower pressures. In addition, gas hydrates can be directly produced for their capability to act as phase change materials at temperatures higher than 0 °C. This research deals with cold energy storage via the production of gas hydrate into a lab-scale apparatus. Hydrates were produced with pure carbon dioxide and with CO2/N2 mixtures (70/30 and 50/50 vol%). For each mixture, the amount of energy spent for hydrates production and cold energy stored were calculated, and the results were compared among each other. The addition of nitrogen to the system allowed us to maximise the energy stored/energy spent ratio, which passed from 78.06% to 109.04%; however, due to its molecular size and the consequent impossibility to stabilise the occupied water cages, nitrogen caused a reduction in the total quantity of hydrates produced, which was obviously proportional to the energy stored. Therefore, the concentration of nitrogen in the mixtures need to be carefully determined in order to optimise the Estored/Espent ratio.

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Section: Introductionmentioning

confidence: 99%

“…In this context, carbon dioxide hydrates gained the interest of researchers due to their latent heat and gas storage capacity in addition to the wide phase change temperature range [36]. The latent heat of carbon dioxide hydrates is higher than that of ice, at up to 500 kJ/kg [39,40].…”

Section: Introductionmentioning

confidence: 99%