[RE-wrenches] SWH - glycerin HTF

[Kelly Keilwitz, Whidbey Sun & Wind]

Thermal Wrenches:

Have any of you tried the glycerin-based heat transfer fluid instead  
of glycol? We're interested in its purported resistance to heat  
degradation, perhaps extending the period between service changes. The  
particular mfr and brand we're considering is Whitlam "Solar Hi-Temp.  
It's rated for continuous operation up to 180˚ C and resistance to  
degradation in short-term exposures up to 232˚C. What's the downside  
(other than cost)?
Thanks,

Kelly Keilwitz, P.E.
Whidbey Sun & Wind
Renewable Energy Systems
NABCEP Certified PV Installer
kelly at whidbeysunwind.com
360.678.7131