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Humidification performance is evaluated under different operation conditions.
However, the humidification performance can be improved when higher temperature deionized water is injected or high temperature coolant is supplied.
Moreover, better humidification performance is achieved when the injection water flow rate is controlled according to the working conditions of the stack.
At high humidification, performance decreased because of condensation and blocking of the gas diffusion layer, but replacing the rectangular channel with an anode down-slanted channel improved performance to match that of a rectangular cell at normal humidification.
The flow rate influence is moderated regarding the humidification performance (except for Vapotherm).
In addition, the humidification performance of the counter-flow model was independent of flow and respiratory rate, in contrast to the heated passover humidifier in which humidification performance decreased with increasing ventilator rates [ 32].
Similar(51)
This paper describes a model-based characterization of the equilibrium points of an open-cathode fuel cell system as the baseline for proper controller design, highlighting the relation between fuel cell temperature, humidification and performance.
A reduction in the reactant stream humidification decreased cell performance and resulted in non-uniform distributions of overpotentials and performance along the flow field.
A thermal desalination unit was modeled and analyzed, and the results led to the selection of a multi-effect thermal vapor compression (METVC) unit for producing fresh water from seawater for both general use and humidification; then the performance of a STIG-based combined system was investigated.
Experiments with a five-cell PEMFC stack with an active area of 250 cm2 were carried out to analyze the effects of various parameters (such as the operating temperature, current density, and water injection flow rate) on the evaporation of injected water for humidification and cooling performances.
Performance of the system is predicted by a developed mathematical model where supply air states, mass of humidification and coefficient of performance (COP) are adopted as performance indices to evaluate the feasibility and energy utilization ratio of the system.
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