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Usui, Hiromoto
Mesin
Mechanical Engineering

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Particle Size Distribution and Rheolog ical Characteristic of Trimethylolethane Treated by Cationic Surfactant Indartono, Yuli Setyo; Usui, Hiromoto; Suzuki, Hiroshi; Tanaka, Satoshi; Nakayama, Kousuke; Komoda, Yoshiyuki; Itotagawa, Tetsu
Mesin Vol 22, No 2 (2007)
Publisher : Mesin

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Abstract

Trimethylolethane (TME) trihydrate particle suspended in water is a proper substance for latent heat transportation in cooling systems, since it has high heat transfer and thermal capacity. Additives, oleyl bishydroxyethyl methyl ammonium chloride as surfactant and sodium salicylate as counter-ion, were added into TME slurry to reduce its friction factor. Aditives influence on particle size distribution and rheological characteristic of TME are investigated in this study. It is found that the additives do not influence particle size at crystallization point, but they clearly inhibit further particle growth. By increasing molar ratio of counter-ion to surfactant, the particles do not grow at all. Increasing TME concentration reduces the apparent viscosity of TME with surfactant and increases critical shear rate for Shear Induced Structure (SIS) occurrence. By connecting this SIS phenomenon with previous data, it is found that there is a relation between the SIS and drag reduction for this drag-reducing TME suspension system.
STUDY ON APPLICATION OF DRAG-REDUCING TRIMETHYLOLETHANE SLURRY IN DISTRICR COOLING SYSTEM Usui, Hiromoto; Suzuki, Hiroshi; Komoda, Yoshiyuki; Indartono, Yuli Setyo
Mesin Vol 23, No 1 (2008)
Publisher : Mesin

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Abstract

Trimethylolethane (TME) trihydrate slurry is a proper phase-change material for latent heat transportation in cooling systems since it has excellence heat transfer performance and high thermal capacity. Additives, oleyl bishydroxyethyl methyl ammonium chloride (as surfactant) and sodium salicylate (as counter-ion), were used as drag-reducer substance. These additives not only induce drag reduction in TME slurry, but also control particle growth and agglomeration. In this study, energy saving estimation of drag-reducing TME slurry application in district cooling system is invesitgated. It is found that drag-reducing TME slurry gives remarkable pumping power suppresion in the district cooling system. To maintain high performance of heat exchangers, heat transfer enhancement technique may be needed in those exchangers.
Co-Authors Indartono, Yuli Setyo Itotagawa, Tetsu Komoda, Yoshiyuki Nakayama, Kousuke Suzuki, Hiroshi Tanaka, Satoshi