Pressure And Flow Transient Response Prediction For Power Plant Piping Networks

Abstract

A dynamic mathematical model of a heating plant steam distribution system is developed and implemented in a simulator for use in the prediction of pressure and flow transient responses in the network Five boilers are available to supply steam to the network which contains nine pressure reducing valves and four desuperheaters to provide operating pressures of 6205, 2760, and 1035 kPa. The network, which distributes steam to a district heating system at two entry points, contains piping that ranges from 0.2 to 0.6 meters in diameter with equivalent lengths up to 290 meters. Only steady state operating data and plant specifications were employed in developing the dynamic model. The reliability of the model and numerical solution procedures are demonstrated by a comparison of predicted responses with transient data collected from a shutdown of a 145,000 kg/h boiler during commissioning.