Bio-inspired designs offer innovative solutions for optimizing heat exchangers, though their complexity often exceeds the capabilities of traditional manufacturing methods. Additive manufacturing (AM) enables intricate geometries with enhanced surface areas for improved heat transfer. This study presents a modular algorithm to integrate internal structures into heat exchanger designs, balancing thermal performance and manufacturability. A case study demonstrates the design, simulation, and production of internal structures, identifying the “Diamond Radial” structure as the optimal choice due to its high R-factor and potential to improve efficiency. Future work includes exploring multi-material components and designs for hydrogen storage and fuel cell applications, paving the way for more efficient, application-specific systems.

In this paper we study asymptotic behaviour of distributed parameter systems governedby partial differential equations (abbreviated to PDE). We first review some recently developed resultson the stability analysis of PDE systems by Lyapunov's second method. On constructing Lyapunov functionalswe prove next an asymptotic exponential stability result for a class of symmetric hyperbolic PDEsystems. Then we apply the result to establish exponential stability of various chemical engineeringprocesses and, in particular, exponential stability of heat exchangers. Through concrete examples weshow how Lyapunov's second method may be extended to stability analysis of nonlinear hyperbolic PDE.Meanwhile we explain how the method is adapted to the framework of Banach spaces Lp , $1<p\leq \infty$ . 


In this paper we study the frequency andtime domain behaviour of a heat exchanger network system.The system is governed by hyperbolic partial differentialequations. Both the control operator and the observation operator are unbounded but admissible. Using the theoryof symmetric hyperbolic systems, we prove exponentialstability of the underlying semigroup for the heat exchangernetwork. Applying the recent theory of well-posedinfinite-dimensional linear systems, we prove that thesystem is regular and derive various properties of itstransfer functions, which are potentially useful forcontroller design. Our results remain valid for a wide classof processes governed by symmetric hyperbolic systems.