![]() ![]() Including warm-up, heat losses and running loads. CFD simulations are performed to validate a 1D design procedure and to investigate the effects of non-equilibrium condensation within highly supersonic stream of pure steam. How to calculate steam requirements for flow and non-flow applications. All these levels of analysis are surveyed and compared in this paper. Wet steam models are available in some commercial CFD codes and should be able to represent the non-equilibrium behavior of the flow. Finally, a still higher level of modeling is multiphase CFD. ![]() Other design techniques are based on interpolations of experimental data and, although empirical, can provide suitable sizing of the main ejector dimensions. However, in the case of steam ejectors, the ideal gas behavior is far from being physically consistent. Design techniques for ejectors are still a matter of discussion.Ideal gas models are usually employed to obtain a first set of dimensions. All you can do is to calculate (or estimate) the amount of non-condensables and condensable vapor that has to be evacuated to maintain the desired vacuum. A very important case of condensing ejector is the steam ejector, which can be used for suction of non-condensable gases in steam power plants or in heat-powered chillers. In many cases, condensation or evaporation occur, either within the motive or suction flow. Supersonic ejectors are commonly used for many applications in the field of refrigeration. ![]()
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