Development and Integration of a Hydrogen Generation System: with Applications to PEMFC Hybrid Power Systems
Date Issued
2015
Date
2015
Author(s)
Li, Siou-Cheng
Abstract
This thesis develops an on-demand hydrogen generation system that can produce hydrogen from sodium borohydride (NaBH4) solution. We also construct a simulation model that can describe the system dynamics, and allow us to predict the hydrogen production for polymer electrolyte membrane fuel cell (PEMFC) hybrid power systems.First, we cooperate with M-Field Energy LTD. and redesign their fuel feeding and cooling sub-system. The modified system can dissipate heat faster, and it use less catalysts to produce hydrogen for operating a 3kW PEMFC. We also show that the new design can improve the hydrogen generation speed and conversion rate.Second, we develop an automatic control strategy that can adjust the feeding intervals of NaBH4 solution when the PEMFC load is varied. Furthermore, we implement the control strategy on a microcontroller (ATMEL SAM3X8E) and integrate the hydrogen generation system with the PEMFC hybrid power system.Last, we discuss the effects of NaBH4 feed volume and concentration, and develop a simulation model of the hydrogen generation system. The model can be applied to predict the system dynamics and to estimate hydrogen production. In the future, we can use the model to evaluate the hydrogen generation rates and efficiencies when integrating the hydrogen generation system with PEMFC hybrid power systems.
Subjects
Chemical hydrogen generation
Sodium borohydride
Hydrogen storage
Fuel cell
Hybrid system integration
SDGs
Type
thesis
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