Experimental investigations of ice slurry flow based on monoethylene glycol at high ice fractions

Yanuar Yanuar,Agus S Pamitran,Fajri A Rayhan,Gilang G Utomo,M Akbar,E Kusrini,A Yatim,E.A Setiawan,F.H Juwono

doi:10.1051/e3sconf/20186701029

Abstract

Ice slurry has so many advantages as phase-change slurries due to the high latent heat of its particles. Ice slurry is one of a competitive alternative to conventional secondary refrigeration systems that have been successfully employed in many applications. In this research, ice slurry flow with monoethylene glycol (MEG) at high ice fractions was investigated. The experiment was carried out by measuring shear stress and flow rate as variable to calculate power law index. The experiment was performed in 14 mm, 21 mm, and 24 mm circular tubes, respectively. The Initial concentration of 5 wt%, 7 wt%, and 10 wt% of MEG was investigated. Ice fraction was maintained above 30% in a storage tank. Experimental results of the Darcy friction factor were compared to Poiseuille and Blasius model. The ice slurry flows exhibited a shear-thickening flow (n>1) for all initial concentration in the range 1.07 - 1.58. The Greater initial concentration of MEG tends to give smaller friction compared with another ice slurry flow with smaller initial concentration.

Highlights

IntroductionIce slurry is a two-phase fluid (solid-liquid) made from a mixture of aqueous solutions between water as a solvent and an additive as a solute
Ice slurry is a two-phase fluid made from a mixture of aqueous solutions between water as a solvent and an additive as a solute
Ice slurry with 5 wt%. initial concentration had coarser solid ice particles than ice slurry with 10wt%

Summary

Introduction

Ice slurry is a two-phase fluid (solid-liquid) made from a mixture of aqueous solutions between water as a solvent and an additive as a solute. There are numbers of additives compound which are widely used in the generation of ice slurry, including sodium chloride, glycol, alcohol, and others. According to Egolf and Kauffeld [1], the definition of ice slurry can be described as follows: Ice slurry consists of a number of ice particles in aqueous solution. Ice slurry as a secondary refrigerant has high cooling capacity given by the latent heat of phase change. There is still need a lot of research, on how to generate ice slurry in an efficient, reliable and economical way for use in a broader range of applications [2]

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