Momentum Integral Network Method for Thermal-Hydraulic Systems Analysis. It can be utilized as a stand-alone program or interfaced to another computer program for concurrent analysis. Through such coupling, a computer code limited by either the lack of required component models or large computational needs can be extended to more fully represent the thermal hydraulic system thereby reducing the need for estimating essential transient boundary conditions. Volumes are used to represent tanks or other volume components, as well as locations in the system where significant flow divisions or combinations occur.
Boundaries are simply points where the network interfaces with the user or another computer code.
Several fluids can be simulated, including water, sodium, NaK, and air. Equations conserving mass and energy are used to calculate pressure and enthalpy within volumes. An integral momentum equation is used to calculate the segment average flow rate. In-segment distributions of mass flow rate and enthalpy are calculated using local equations of mass and energy. The segment pressure is taken to be the linear average of the pressure at both ends.