The integration feasibility of the stack in a portable power module is demonstrated by the conceptual design of the system. An energy balance is simulated with Matlab Simulink®. The operation modes of the system, efficiency and convection inside the stack are studied via the Simulink® simulation. Also an electrical simulation is done for the complete cell characterization. A modular 3D design of the stack is also drawn using Solid Works®. The model will be validated with the fabrication of an experimental microtubular cell stack. An experimental 2cell-stack has been built and tested with a total power of 0.9W.