The aerospace industry's growing need to reduce harmful gas emissions has led to the design and conception of aircraft that increasingly make use of new generation's components for power generation and on-board systems management. The main technologies that meet these needs are systems that generate electricity using hydrogen as a means of powering fuel cells, the actual power generation components. Considering all these design constraints, the following thesis aims to carry out a fluid-dynamic analysis of the implications of the cooling of these components related to electric power generation. To pursue this goal, a new generation of compact heat exchanger have been used to allow for proper heat dissipation.