“The Egg guys have been very successful using the Evans coolant. The fluid is less efficient, so it inflates the operating temperature. But it also brings a new very high boiling point to the party. So instead of operating at the normal 200F temp, they operate at 215F. But the boil over temp is way up there...I forget, but something like 260F or so. As a result, they end up with greater safety margin. A very sound decision for their installation. This because boil over is sudden, catastrophic, and essentially irreversible. When it blows, it blows.”

 

I don’t see anything startling about this Evans coolant … 50/50 water and glycol at 15 psi has a boiling point of 265F.

Either the boiling temperature is much higher than 260F or there is something else going on.

JWW