Voltage multiplication

Single cells produce less than 1 V of electricity, which is far from enough to power a vehicle. In order to produce a useful voltage, multiple cells must be assembled into a fuel cell stack. This can be achieved in a parallel and/or a series mode to supply feed gas to the stacks. In a parallel gas supply fuel cell stack, all cells are fed in parallel from a common hydrogen/air inlet. In the serial configuration the gas from the outlet of the first cell is fed to the inlet of the second cell and so on until the last cell, which helps prevent non-uniform gas distribution. To avoid a large pressure drop this arrangement can be used only for stacks with a small number of fuel cells [7]. 

RooBng plants (asphalt saturators) Felt or paper saturators spray section, asphalt tank, wet looper Crushed rock or other minerals handling Asphalt vapors and particulates (liquid) Particulates (dust) Exhaust system with high inlet velocity at hoods (3658 m/s [>200 ft/min]) with either scrubbers, baghouses, or two-stage low-voltage electrostatic precipitators Local exhaust system, cyclone or multiple cyclones... 

Okokura. K.Y.. Multiple restriking voltage efteci in a vaeuiim circuit breaker on motor insulation, IEEE Paper 80. SM 697-3 (1980). 

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