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V entilation checkup; In respect to danish legislation a sensor is placed in the ventilation tubes above the fume cupboard to ensure that proper suction is present. The Load Module The main aim for the design of the load system is to be able to control the output current, voltage and power in different situations. While testing the static performance it is desirable to control the current so a polarization curve can be obtained. On the other hand a voltage control is more safe because the fuel cell will not be loaded more than it is capable of supplying, why this control mode should also be possible.

Placed on a board which is inserted into the PC. 5 The programs are included on the CD-rom: . Computer Programs . However it should be noticed that the programs cannot run on a ordinary PC as the DSP-unit has to be present. 4A 38 CHAPTER 7. 8: Shows a sketch of the electronic setup. The second error level disconnect all power supply to the system components and all valves return to their initial position, which can be triggered by the following errors: • H igh Level Hydrogen; Two hydrogen sensors have been mounted, one inside the fume cupboard, and one outside.

The arrows illustrates the parameters that relates the subsystems. In the next four chapters each of the models will be presented along with the controllers implemented for the states . One exception is the DC/DC-converter which is modelled together with the fuel cell. The fuel cell will be modelled be a discrete representation of the flow channels. The model of the air and hydrogen side will be modelled using orifices effects and pressure calculation of compressible gases. At the time writing the sub models have not been assembled into an overall model, as the primary concern is to test the subsystems independently.

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Design and Control of Fuel Cell System for Transport Applica


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