The management of heat flows in liquid propellant endo-reactors has always been a problem that requires an in-depth study of the physical problem and the application of advanced refrigeration techniques. The high temperature of the gases in the combustion chamber causes a flow of heat through the wall that does not allow the survival of the components if not adequately refrigerated. One of the most delicate and at the same time stressed components is the injection plate which must be correctly refrigerated to maintain the injection performance at all times. The engine studied in this work is the innovative AVIO M10.