Abstract
Nonadiabatic one-dimensional flow of steam in elementary modules of pipe networks, i.e. straight pipes and fittings, has been considered. A simple method of determining the amount of condensed water, distributions of pressure and temperature along these modules has been developed. The problem of critical flow regime has been discussed and a general formula of checking for the presence of sonic velocities at arbitrary cross section of the pipeline has been given. When embedded into a supervising procedure, the described routines can be used to build a mathematical model of a steam pipe network of arbitrary topology. Numerical examples are included. A set of equations describing all the steam properties used in the calculations is given in the Appendix.
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