Effect of Molar Ratio of Counter-Ions to Cationic Surfactants Treating Trimethylolethane Hydrate Slurries

Suzuki, Hiroshi; Tateishi, Shingo; Komoda, Yoshiyuki

doi:10.1252/jcej.09we191

Cited by 2 publications

(1 citation statement)

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“…In order to practicalize the hydrate slurries as latent heat transportation fluids, it is important to reduce their drag and prevent their agglomeration and sedimentation in the pipe flow. Indratono et al and Suzuki et al reported trimethylolethane hydrate slurries with cationic surfactants show DR effect even in the condition of high hydrate fraction . Modak et al and Usui et al reported that drag‐reducing surfactant of cetyl dimethyl betaine (CDB) makes ice particle size small and prevents particle aggregation .…”

Section: Introductionmentioning

confidence: 99%

Pipe diameter effect on flow and heat transfer characteristics of ammonia alum hydrate slurries with additives

et al. 2019

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In this study, pipe diameter effect on flow and heat transfer characteristics of ammonia aluminium sulfate dodecahydrate (ammonia alum hydrate: AlNH 4 (SO 4) 2 Á12H 2 O) slurries with drag reducing surfactants and poly(vinyl alcohol) was investigated. Pressure loss and heat-transfer coefficients of ammonia alum hydrate solutions and slurries were measured with double-pipe heat exchangers with different inner tube diameters. Measurement results indicated that pseudo-laminarization by the surfactant caused drag-reduction effect and its saturated magnitude was affected by inner tube diameters. Pseudo-laminarization also produced heat transfer reduction effect and its magnitude was not affected by inner tube diameters. Calculation results of Colburn's j-factor divided by friction factors indicated that heat transportation efficiency of the hydrate solutions/slurries with additives was increased due to the contribution of drag-reduction effect.

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Section: Introductionmentioning

confidence: 99%