Then, there is the Coriolis mass flow meter and the subcooler 2 which function is to assure that the fluid entering the pre-heater will be subcooled. Just upstream the preheater inlet, the enthalpy of the liquid is estimated from its temperature T1
by a 0.25 mm thermocouple within the pipe, and its pressure p1 by an absolute pressure transducer. At the pre-heater, the fluid is heated up to the desired condition at the test section inlet.