| 摘要 |
PURPOSE: A method for automatically calculating a flow rate of steam drained off from the end of a steam drain pipe to a flash tank in a thermal power plant is provided to reduce time needed for calculating the flow rate and increase accuracy by automatically calculating/outputting the flow rate of the steam drain with a flow rate calculating program. CONSTITUTION: A pressure, a size, and a length of a pipe, and data for fittings/valves are inputted(S1). A friction coefficient, an inner diameter, a friction factor, and a specific volume of the valves/fittings are calculated by using design information(S2). A ratio for a static specific heat to a constant-pressure specific heat, and limiting factors are calculated by using a calculated value(S3). A flow velocity and a pipe drain pressure are calculated by using a calculated result(S4). |
