DIERS Benchmarks
Vapor Flow Case 1
Summary Report (Single-phase Engine) Download
This report is based on utilizing the Mach II CDS, single-phase design engine. The single-phase engine is independent of the Mach II, two-phase design engine and uses the Darcy formula for incompressible (liquid) flow and the adiabatic Shapiro relationship for compressible(vapor/gas) flow, when calculating the inlet and outlet pressure drops.
The fluid flowrate is not reduced based on inlet pressure drop. The two-phase engine will reduce the relieving pressure based on tea inlet pressure loss thus reducing relief flowrate.
Vapor flow calculated base on 6.38 in2 nozzle = 21.667 lb./hr.
Flowrate Choke Quality Inlet dP % Pset Outlet dP % Pset Piping
21,667 --- 1.0 3.05 5.80 2.15 4.08 4 X 6
21,667 __ 1.0 0.84 1.89 2.15 4.08 6 X 6
