Analysis of Transient Water Dynamics
Accurate measurement of water transport and water accumulation in an operating PEMFC is critical to optimize operating conditions and transport layer configurations. A water balance setup, based on in-line gas flowmeter, pressure, relative humidity and temperature sensors, was developed and demonstrated to track the real-time water transport and accumulation within operating PEMFCs. Current results indicate that changing operating conditions can have a dramatic effect on the water transport across the membrane, while the ratio of water transported to produced remains relatively constant with current density.
