Experimental analysis on pressure drop and heat transfer of a terminal fan-coil unit with ice slurry as cooling medium

This paper is concerned with the experimental analysis of a standard terminal fan-coil unit with ice slurry as coolant. The ice slurry was produced from an ethylene glycol 10 wt% aqueous solution. The pressure drop measurements are presented as a function of volumetric flow rate, ice concentration and Reynolds number. The experimental friction factors are obtained and discussed. The fan-coil capacity was experimentally determined for chilled water and melting ice slurry with inlet ice fractions around 5, 10, 15 and 20 wt%, considering in each case three different fan rotation velocities. The fan-coil capacity is higher with melting ice slurry than with chilled water by factors between 3.7 and 4.9. The heat transfer analysis realizes that the air side thermal resistance controls the heat transfer process. Experimental results for the melt off rate of ice in the fan coil and the superheating at the fan-coil outlet are shown and discussed.

[1]  B. S. Petukhov.  Heat Transfer and Friction in Turbulent Pipe Flow with Variable Physical Properties , 1970 .

[2]  S. Kalaiselvam,et al.  Numerical investigation of heat transfer and pressure drop characteristics of tube-fin heat exchangers in ice slurry HVAC system. , 2009 .

[3]  David G. Thomas.  Transport characteristics of suspension: VIII. A note on the viscosity of Newtonian suspensions of uniform spherical particles , 1965 .

[4]  B. Niezgoda-Żelasko,et al.  Momentum transfer of ice slurry flows in tubes, experimental investigations , 2006 .

[5]  T. Kiatsiriroat,et al.  Heat transfer model of slurry ice melting on external surface of helical coil , 2008 .

[6]  Michael Kauffeld,et al.  From physical properties of ice slurries to industrial ice slurry applications , 2005 .

[7]  F. Illán,et al.  Experimental study of ice slurry performance in a standard fan coil , 2009 .

[8]  J. Guilpart,et al.  An excess function method to model the thermophysical properties of one-phase secondary refrigerants , 2002 .

[9]  Rahmatollah Khodabandeh,et al.  Experimental investigation of ice slurry flow pressure drop in horizontal tubes , 2009 .

[10]  P. Egolf,et al.  The fluid dynamics of ice slurry , 2005 .

[11]  Savvas A. Tassou,et al.  Present and future applications of ice slurries , 2005 .

[12]  S. Tassou,et al.  Heat transfer and pressure drop of ice slurries in plate heat exchangers , 2002 .

[13]  Iif-Iir,et al.  Handbook on Ice Slurries: Fundamentals and Engineering. , 2005 .

[15]  J. P. Hartnett,et al.  Advances in Heat Transfer , 2003 .

[16]  M. W. Wambsganss,et al.  Heat transfer and pressure drop in ice-water slurries , 2000 .

[17]  G. Witkamp,et al.  Time-dependent behavior of different ice slurries during storage , 2005 .

[18]  G L Quarini,et al.  Pressure drop of flowing ice slurries in industrial heat exchangers , 2009 .

[20]  G. Witkamp,et al.  Superheating of ice slurry in melting heat exchangers , 2008 .

[21]  Anthony M. Jacobi,et al.  Air-side data interpretation and performance analysis for heat exchangers with simultaneous heat and mass transfer: Wet and frosted surfaces , 2005 .