On the modelling of heat exchangers and heat exchanger network dynamics using bond graphs

Jørgen Bremnes Nielsen and Eilif Pedersen

Mathematical and Computer Modelling of Dynamical Systems, 2018, vol. 24, issue 6, 626-642

Abstract: Heat exchanger networks are important systems in most thermal engineering systems and are found in applications ranging from power plants and the process industry to domestic heating. Achieving cost-effective design of heat exchanger networks relies heavily on mathematical modelling and simulation-based design. Today, stationary design calculations are carried out for all new designs, but for some special applications, the transient response of complete networks has been researched. However, simulating large heat exchanger networks poses challenges due to computational speed and stiff initial value problems when flow equations are cast in differential algebraic form. In this article, a systems approach to heat exchanger and heat exchanger network modelling is suggested. The modelling approach aims at reducing the cost of system model development by producing modular and interchangeable models. The approach also aims at improving the capability for large and complex network simulation by suggesting an explicit formulation of the network flow problem.

Date: 2018
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DOI: 10.1080/13873954.2018.1533566

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