This paper presents the fundamental approaches of modeling thermal-hydraulic component briefly. A set of lumped parameter mathematical models is developed, which are based on conservation of mass and energy. Subsequently, the connection rule for basic thermal-hydraulic components and the method to automatically generate the complete thermal-hydraulic system model are put forward. The integration methods for solving the cross-coupling thermal-hydraulic equations are also discussed for a position-controlled thermal-hydraulic system. Simulation results show the interaction between pressure and temperature. The simplified representations of thermal-hydraulic differential equations are also proposed in this paper, which can reduce simulation time. The validity of the simplified representations is judged by simulation.

Issue Section:
Technical Briefs
Keywords:
differential equations, heat transfer, hydraulic systems, hydrodynamics, integration, thermodynamics, thermal-hydraulic, simulation, modelling, method
Topics:
Computational methods, Differential equations, Flow (Dynamics), Heat transfer, Modeling, Pressure, Simulation, Temperature, Fluids
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Copyright © 2008
 by American Society of Mechanical Engineers
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