Experimental investigation on inhomogeneity of ice packing factor in ice slurry flow

2016 ◽  
Vol 70 ◽  
pp. 33-41 ◽  
Author(s):  
Tatsunori Asaoka ◽  
Atsushi Tajima ◽  
Hiroyuki Kumano
Keyword(s):  
Experimental Investigation ◽  
Ice Slurry ◽  
Slurry Flow ◽  
Packing Factor

REALIZATION OF HIGH IPF ICE SLURRY FOR DISTRICT COOLING

2010 ◽  
Vol 18 (03) ◽  
pp. 213-220
Author(s):  
YOON PYO LEE ◽  
SANG HOON LEE ◽  
HOSEON YOO
Keyword(s):  
Mesh Size ◽  
Hole Size ◽  
Ice Slurry ◽  
Slurry Flow ◽  
Bottom Part ◽  
Packing Factor ◽  
Ice Particles ◽  
Stagnant Region

The Production of high IPF (ice packing factor) ice slurry was realized. The ice slurry maker which can efficiently produce ice slurry under ice particles in-flowing condition was revised. We removed the stagnant region at the top of the ice slurry maker, thereby high IPF ice slurry was realized. The IPF controller with 6 mm diameter holes could not control IPF in a pipe. This is because ice particles in ice slurry flow exist homogeneously not only at the upper part but also at the bottom part. We changed the hole size at the surface of the IPF controller by means of fine meshes, which, then, increased the IPF in the pipe by 70% when the mesh size was 80 μm or less.

scholarly journals Loss coefficients of ice slurry in sudden pipe contractions

2010 ◽  
Vol 31 (3) ◽  
pp. 73-86
Author(s):  
Łukasz Mika
Keyword(s):  
Mass Fraction ◽  
Flow Resistance ◽  
Volume Fraction ◽  
Experimental Studies ◽  
Solid Particles ◽  
Minimal Flow ◽  
Ice Slurry ◽  
Slurry Flow ◽  
Flow Through ◽  
Loss Coefficients

Loss coefficients of ice slurry in sudden pipe contractionsIn this paper, flow systems which are commonly used in fittings elements such as contractions in ice slurry pipelines, are experimentally investigated. In the study reported in this paper, the consideration was given to the specific features of the ice slurry flow in which the flow behaviour depends mainly on the volume fraction of solid particles. The results of the experimental studies on the flow resistance, presented herein, enabled to determine the loss coefficient during the ice slurry flow through the sudden pipe contraction. The mass fraction of solid particles in the slurry ranged from 5 to 30%. The experimental studies were conducted on a few variants of the most common contractions of copper pipes: 28/22 mm, 28/18 mm, 28/15 mm, 22/18 mm, 22/15 mm and 18/15 mm. The recommended (with respect to minimal flow resistance) range of the Reynolds number (Re about 3000-4000) for the ice slurry flow through sudden contractions was presented in this paper.

A FIELD APPLICATION CASE OF THE DIRECT ICE SLURRY TRANSPORTING SYSTEM FOR DISTRICT COOLING

2010 ◽  
Vol 18 (01) ◽  
pp. 43-53 ◽  
Author(s):  
HOSEON YOO ◽  
SANG HOON LEE ◽  
YOON PYO LEE
Keyword(s):  
Volume Fraction ◽  
Field Application ◽  
Pumping Power ◽  
Ice Slurry ◽  
Packing Factor ◽  
Ice Volume ◽  
Energy Delivery ◽  
Cold Energy ◽  
Ice Content

In order to investigate the feasibility of the direct ice slurry transporting system for the purpose of district cooling, a case study of field application is performed. The research aims to include the field measurement of ice packing factor, the performance of cold energy delivery, and the branching characteristics of ice slurry in which the additive is propylene glycol wt 10%. Two representative types of pipe branch are dealt with in this work. For the slurry flow with ice volume fraction of 0.16 or less, the pipe blocking due to aggregation is not observed. It is confirmed that the mass flow rate of ice slurry per unit cooling load markedly decreases with the increase of the ice content. The pumping power also decreases, but remains unchanged when the ice fractions are higher than a certain level.

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