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Steam generation model

Question:

What could be possibly wrong with my Steam generation model if I keep getting the warning: “WARNING, Quality at compressor inlet/exit is smaller than 1. The set of dimensionless parameters were derived for gasses. Evaluate solution, Solve Steady State”?

Is the fluid (two-phase water) supposed to be pure vapor as it enters/leaves the compressor?

Answer:

A compressor is designed such that a fluid in its gas phase has to be supplied at the inlet. Thus, the quality must be close (for a compressor that can handle a wet gas) and larger than 1. A quality of a value less than 1 means that the compressor is compressing water which is in a liquid phase. For these operating conditions, compressors will not work because water in a liquid phase is a noncompressible fluid. That is why Flownex gives a warning.


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