Dynamic Modeling and Simulation of the Superconducting Super Collider Cryogenic Helium System

To study the operation of the Superconducting Super Collider (SSC) cryogenic system during transient operating conditions, we have developed and programmed in FORTRAN, a time-dependent, nonlinear, homogeneous, lumped-parameter simulation model of the SSC cryogenic system. This dynamic simulator has a modular structure so that process flowsheet modifications can be easily accommodated with minimal recoding. It uses the LSODES integration package to advance the solution in time. For helium properties it uses Air Products’ implementation of the standard thermodynamic model developed by the NBS. Two additional simplified helium thermodynamic models developed by Air Products are available as options to reduce computation time. To facilitate the interpretation of output, we have linked the simulator to the Speakeasy conversational language.