I'm working on a design of a 400 kW water chiller using R407c. The chiller has to be as absolutely simple as possible and it has to be explosion proof. It will have to work in a coal mine. I have an idea to use an injector instead of a thermal expansion valve. (Phillips in the US is one of the better known suppliers)
Reason: more simple and one less thing to break.
Anybody have any thoughts on this?