System Analysis and Comparison Between a 2 Mw Conventional Liquid Cooling System and a Novel Two-Phase Cooling System for Fuel Cell Powered Aircraft

In the EU funded BRAVA project, technologies for a Fuel Cell based Power Generation System for aviation are being developed. In this paper, the analysis of a 2 MW cooling system is dis-cussed. A comparison is made between a conventional liquid cooling system with Ethylene Glycol Water (EGW) and a novel two-phase cooling system, which uses the evaporation of a liq-uid to remove waste heat from the fuel cells. The mass of a liquid EGW system is 35% higher than for two-phase methanol with accumulator and 2.4 times higher than for two-phase metha-nol without accumulator.