1. A Brief State-of-the-Art of
Ice Slurries and its
Technology
Peter W. Egolf
University of Applied Sciences of Western Switzerland
Institute of Thermal Sciences and Engineering
HEIG-VD / Hes-so

2. Main components:
Plasma (carrier fluid)
„Thrombocytes“ (fluidity)
„Erythrocytes“ (red blood cells,
transport)
„Leukocytes“ (white blood cells,
protection)
Multifunctional fluids in nature, e.g. human blood

3. Technical multifunctional fluids
Micro- capsule
slurries
Micro- capsule
slurries
Shape
stabilized
paraffins
Shape
stabilized
paraffins
Micro-
emulsion
slurries
Micro-
emulsion
slurries
Clathrate
slurries
Clathrate
slurries
Ice slurriesIce slurries
An overview of phase change slurries (PCS), which show a solid-liquid phase transition.
This graphic was designed on the basis of Inaba, 2000.

4. Thermal storage materials
Source:
International Energy Agency
Annex 18
Sensible heat storage
with water

5. Phase change materials
Type Substances Tm
(°C)
Hm
(kJ/kg)
Ref.
Ice/water/additives Ice slurries -5 to 0 80-150 Egolf
et al.
Paraffins Eicosane, Docosane, etc. -12 to 71 128-197 Jahns
et al.
Non-paraffin organics Beewaxes -13 to
187
131-438 Wirz
et al.
Metallics Eutectic Bi-Cd-In 30-125 200-800 Wirz
et al.
Salt Hydrates MgSO4
-7H2
O 28-137 270-650 Wirz
et al.
Metal-salt compounds Ni-activated porous
ceramics
1070-
1130
280-480 Wirz
et al.

6. Ice slurry production
Liquid film
Ice slurry

7. Newest ice slurry generators
a) Stamatiou et al., 2005
b) Stamatiou et al., 2003
c) Lim, 2004
See also review of Zhang
and Ma, 2012.

8. Ice slurry ice particles
Photography:
Didier Vuarnoz
University of Applied
Sciences of Western
Switzerland
Time behaviour
discovered by
Frei and Egolf, 2000.

9. Laboratory installation at HEIG-VD/IGT/TIS

10. Specific enthalpy measurements
0
10
20
30
40
50
60
-15 -10 -5 0 5 10 15
Chaleurspécifique(kJ/kgK)
Temperature (°C)
q = 78.2 kW/m2
m = 0.7 kg/s
q = 68.5 kW/m2
m = 0.69 kg/s
q = 8.8 kW/m2
m = 0.37 kg/s
calcul numérique
Specificheat(kJ/kg)
Effective specific heat is
the derivative of the specific
enthalpy

11. Ice slurry storage
a) Homogeneous ice slurry storage
b) Heterogenous ice slurry storage
From: Egolf et al., 2008

12. Rheological behavior
τ
γ
.
b
τ0
Dynamic viscosity η
+
Critical shear stress τ0
UVP Technology (Takeda/Vuarnoz)

13. Multifunctional fluids in nature, e.g human blood
0
50
100
150
200
0 2 4 6 8 10
Positionacrossthepipe
Velocity (m/s)
Moving bed flow
Theoretical model, Egolf et al, 2004.

14. • Supermarket refrigeration
• Air conditioning
• Food cooling (direct cooling)
• Aero plane cabine cooling, etc.
Applications of ice slurry
http://www.icesynergy.com/L4-1-fishchill.html

15. 1) The technology has been mainly developed
2) Theories and calculation methods exist (IIR Handbook, 2005)
3) Advantage of high enthalpy density
4) Fluid ice (very simple and efficient transport of cold)
5) In case of blogging warming-up solves the problem
6) Advantage is the excellent cooling properties for any kind of
food
Conclusions