Analysis of an active tubular liquid-feed direct methanol fuel cell

► We proposed a 2-D, two-phase, non-isothermal model for an active, tubular, liquid feed DMFC. ► We examined energy densities of both tubular DMFC stacks and planar DMFC stacks. ► A tubular DMFC stack with proper geometry parameters can yield a higher energy density than a planar one. ► A large anode flow rate is needed for an effective gas CO2 removal from the anode channel. ► Lowering the methanol solution or air flow rate leads to a higher temperature increase along the flow channel.