###### Abstract
The heat sink with the branched fluid flow had the highest wall temperature and the lowest overall pressure drop, according to the author's study. In his other study [21], the author compared the two scenarios, but he did so by keeping the applied heat flux, surface area, and fluid flow rate constant. The heat sink with the branched fluid flow network, according to the author, had the highest wall temperature. Branched fluid flow networks are determined to be favorable factors for the thermal energy storage system fluid flow path. Similar research was carried out by [PERSON] et al. [22], who contrasted the parallel flow path network with the fractal-like flow path. The authors discovered that the fractal-like flow structure showed uniform surface temperatures for similar maximum wall temperatures. A similar phenomenon was identified by [PERSON] et al. [23] when using branching flow networks. Furthermore, the authors noted that using branched flow networks reduces the possibility of flow obstruction. In an experimental investigation, [PERSON] et al. [24] compared the performance of heat sinks with parallel and branched flow networks, finding that the branched flow network demonstrated higher thermal efficiency under the same operating conditions. Additive manufacturing, also called 3D printing, is a technology that develops three-dimensional objects layer by layer. It could also be useful for developing TES components. In the beginning, scale models and non-functional prototypes were created using additive manufacturing technology. And now that the technology has advanced, they are used to create intricate designs and functional components. Currently available technology, however, employs two processes to 3D-print an object: (i) scanning the object to be printed and (ii) using the CAD-modeled design to print. The 3D printer prints the object of interest layer by layer using the object's dimensions and coordinates. The most popular kind of 3D printing is material extrusion, which prints layers by pushing material through a nozzle. This method can print a wide range of materials, including concrete, metal, and plastic. Additive manufacturing provides the benefit of developing parts/objects without discrete joints. To improve the thermal performance of the latent heat thermal energy storage system, the principles of biomimetics were applied in an innovative way in this study to develop a TES tank that mimics the structure of a biological system. By mimicking the fluid flow path of a biological system through a branching tree-like structure, the heat transfer fluid flow path was engineered to increase the effective heat transfer surface area (Figure 1). The TES tank, which has a branched flow network for the heat transfer fluid, was constructed using additive manufacturing technology. Moreover, additive manufacturing technology has the advantage of a longer thermal conductive path for heat transfer and may construct complicated parts and bifurcation points on fluid flow passages without discrete joints. The authors believe that the bio-inspired TES tank design based on additive manufacturing technology effectively addresses the lower discharging rates of latent heat thermal energy storage systems.