New experimental system for high pressure and high temperature flashing evaporation experiments

• Introduce a new experimental system for high pressure & temperature flash evaporation.
• We design a big visualization flash chamber similar to the industrial applications.
• The superheated steam from the boiler is used to heat the water in the chamber.
• FBG sensors, Rosemount pressure transmitters and CCD camera record the data.
• The influence of the initial conditions on the NEF is investigated.

Considering the high pressure and high temperature flash evaporation appearing frequently in industry, we design and build an experimental system to explore the flash evaporation under high pressure and high temperature that has not been studied very well. This system includes a very large chamber that provides enough space for the flash wave to spread and also allows two large visualization windows on it, so more image information can be obtained. The chamber is designed to have the cylindrical inner shape to satisfy the strength requirements while the outer shape is cubic. Of particular feature is the boiler as the heat system, which is used in our system to heat the water in the chamber. The Fiber Bragg Grating sensors are used to measure the temperature of the test liquid (water) and a high speed CCD digital camera is set in front of the visualization window to record the pictures of the flash phenomenon. Finally we carried out a test to verify this system.