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Formation Characteristics of Propane Hydrate Using Fiber Layer
HIROYUKI KUMANO,Tatsunori Asaoka,Kento Sugaya,Yuta Mochizuki,Masashi Okada 대한설비공학회 2015 International Journal of Air-Conditioning and Refr Vol.23 No.4
Formation characteristics of propane hydrate using fiber layer were investigated experimentally. Water and propane gas contact in the fiber layer, and the propane gas hydrate can be formed continuously. In the experiment, pressure, temperature, the quantity of water and porosity of the fiber layer were varied as the experimental parameters, and the formation ratio and the formation rate were measured. As a result, it was found that the high formation ratio can be obtained by using the fiber layer. Therefore, it can be said that this method is useful to reduce energy consumption and to simplify the apparatus, since it does not need circulation system. Moreover, it was found that the formation rate increases with the subcooling and the quantity of water, and it is slightly affected by the porosity of the fiber layer
HIROYUKI KUMANO,Tatsunori Asaoka,Tatsuya Hayashi,Peng Zhang 대한설비공학회 2015 International Journal of Air-Conditioning and Refr Vol.23 No.3
The specific heat of a tetra-n-butyl ammonium bromide (TBAB) aqueous solution, the latent heat of a TBAB hydrate, and the specific enthalpy of a TBAB hydrate slurry were measured to understand the thermal storage characteristics of TBAB hydrate slurry. A solution sample and the hydrate slurry were heated, the change in temperature was measured, and the specific heat of the TBAB aqueous solution and the specific enthalpy of the hydrate slurry were obtained from the change in temperature. Two types of TBAB hydrate form. Therefore, the hydrates were separated from the hydrate slurry formed from TBAB aqueous solution having several initial concentrations. The hydrate crystals were placed into solution, and the latent heats were obtained from the temperature change of the solution. The specific enthalpy of the hydrate slurry was estimated from the latent heats of the hydrate crystals and the specific heat of the solution under phase equilibrium conditions, and the measured and estimated values were compared.