Evans Power Cool 180

[Nigel Fox]

Hi Simon, you can only have a mixture of water and steam at saturation conditions, ie the boiling temperature for the system pressure. If the temperature is below saturation it's all water, above it's all steam.

I can see an argument that if you had high heat flux you could get steam bubbles but they couldn't be carried round a sub saturation conditions system, they would be cooled and collapse.

Spring loaded radiator caps just allow the water to remain water above 100C. Pressurisation of a water system below 100C will be from expansion of air in the system.

A water cooled operated below 100C will work even if open to atmosphere.

The Evans coolant will work unpressurised up to 180C if that is the boiling point at atmospheric pressure (as you have described).

The heat removal will be as detailed in in the formula provided by the chap from Evans.