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In many refrigeration applications, heat is transferred to a secondary coolant, which is used to transfer heat without changing state. There are a variety liquids that can be used and these are known also as heat transfer fluids, brines, or secondary refrigerants. This seminar presents helpful engineering and operating guidance for three different types of secondary coolants: aqueous ammonia, calcium chloride and glycols.

1. Validation of Experimental Properties of Ethylene and Propylene Glycol Based Secondary Coolants with ASHRAE Data
   Monika Ignatowicz, P.Eng., KTH Royal Institute of Technology, Stockholm, Sweden
2. Combating Corrosion Problems Caused By Calcium Chloride Secondary Coolants (Brines)
   Kathleen Neault, P.Eng., Member, Refri-Ozone, Grandby, QC, Canada
3. Effective Use of Glycol Based Secondary Coolants
   Kevin Connor, Member, Dow Inc., Midland, MI