To comply with the need for decarbonization of the power and industrial sector, the nuclear fusion Community is developing worldwide new advanced reactor designs to produce heat and/or electricity without emitting CO2. In many of the different reactor designs, heat fluxes greater than 10 MW/m^2 are expected on some components such as the divertor, and must be properly exhausted. The work presented in this thesis is focused on heat removal from the divertor. The aim is to design a new divertor module for the Wendelstein 7-X, equipped with Triply Periodic Minimal Surfaces (TPMS) to maximize heat transfer by promoting the mixing of the coolant in an extended heat transfer surface configuration.