Development of cryogenic piping systems simulation programme

Abstract

In this work, the cryogenic piping simulation programme was developed by using C++ language. It could be implemented to solve the problem of two-phase single-component flow and single phase single-component flow. This developed programme has database managerial part of transport and thermodynamic properties that support the operation of piping design These properties can be used to calculate the proper value of pressure drop, pipe size and length of pipe by considering piping configuration and heat inleak through different insulation as user specified. The developed programme had to be run on Microsoft Windows 95 or later in order to provide many convenient Graphic User Interfaces. Users had to enter data into dialogs or windows of this developed programme. The results of calculation were displayed and printed through printer in tabular form. The recorded data in database file and operating file can be added or changed. The results of calculation were investigated by checking the heat inleak value and pressure drop compared to reference data and result obtained from a commercial simulator named PDROP. It was found that the difference was about 62.42% for heat inleak of polyurethane insulation, 0.89% for heat inleak of vacuum insulated pipe and 20% for pressure drop from PDROP. The difference of estimated cryogen properties are less than ±1.36%.