THE GLACIER JOURNAL
Ideas, explanations and practical questions for the people behind thermal systems.
FIELD NOTES / 01Understand primary refrigerants and secondary coolants, how their circuits differ, and what to check before specifying a Glacier heat transfer fluid.
Industrial heat pumps are commercialised to about 200 °C. For processes above that, thermal oils and silicone fluids are still the default heat transfer route.
Changing a secondary coolant is more than draining and refilling. Confirm compatibility, the cleaning method and the first monitoring window before you start.
Published condemning limits for heat transfer fluids contradict each other. Learn how to read the trend, not the threshold, before deciding to change a charge.
Brine inhibitors, cooling-water treatment and alcohol-coolant additives follow different schedules. See what the catalogue specifies and what to confirm first.
Direct-to-chip liquid cooling puts conductivity, materials and monitoring into the fluid specification. See which checks decide a data-centre coolant.
Freeze protection and burst protection require different glycol concentrations. Learn the difference, and what to check before a cold weekend arrives.
A dielectric fluid's datasheet leads with breakdown voltage, but pour point, viscosity, flash point and material compatibility are the properties that decide whether it works.
Separate indirect-loop, fluorinated and immersion fluid requirements for electronics cooling. Learn what to confirm before shortlisting LM-4, LM-14 or LM-17.
The EU PFAS restriction sets out specific provisions for heat transfer fluids. See the timeline, the named uses, and what to verify before specifying a coolant.
Learn how to specify cold-chain phase-change materials using temperature targets, freezing and melting behaviour, containment and model-specific evidence.
Phase-change materials are specified by a transition temperature, not a working setpoint. See how the catalogue presents its grades and what to verify first.
Low-temperature secondary coolants differ only slightly in volumetric heat capacity, yet their pumping demand can differ by an order of magnitude.
Understand primary refrigerants and secondary coolants, how their circuits differ, and what to check before specifying a Glacier heat transfer fluid.
Compare Glacier LM-4 and LM-8 coolant families by chemistry, model selection, materials and documentation—not generic performance or safety assumptions.
