Effect of biometric flow channel on the power generation at different Reynolds numbers in the single chamber of rumen microbial fuel cells (RMFCs)

Microbial fuel cells (MFCs) represent a completely new method of renewable energy recovery. The purpose of this work is to study the effect of biometric flow channels on the power performance in the single rumen microbial fuel cells (RMFCs) at different Reynolds numbers. Experiments in a circulation system were executed by using a double two-inlet Y-type inlet channel and connecting it with the RMFCs. Some results that were found from the numerical simulation and experiment are addressed as follows: First, the biometric flow channel would create a more uniform flow field with obstacles than one without, regardless of the Reynolds number. Second, an extra voltage output of 0.2 V, based on the example without obstacles, was provided as in the case of one with. This further explains the design of biometric flow channels having a greater, more positive effect on power performance. Finally, these observations can provide more information on realizing the mechanism of MFCs dynamic reactions and further enhance power performance.

► We monitor performance of rumen microbial fuel cells with biometric flow channels. ► Channels with obstacles create a more uniform flow field at various Reynolds number. ► Cells connected to flow channels with obstacles have improved power performance.