Control method of differential pressure water electrolysis system
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United States of America Patent
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Feb 28, 2017
Grant Date -
Mar 5, 2015
app pub date -
Aug 27, 2014
filing date -
Aug 30, 2013
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Abstract
In a control method of a differential pressure water electrolysis system, a reference water level of a gas-liquid separator for normal operations is set to discharge a liquid water stored in the gas-liquid separator to a discharge tube. A depressurization reference water level which is a lower water level than the reference water level is set to discharge the liquid water stored in the gas-liquid separator to the discharge tube upon depressurizing. A depressurization valve is opened to reduce pressure at a cathode side after operation of a differential pressure water electrolysis device has been stopped, in a state with voltage applied. A permissible water level upper limit value at which an open/close valve is opened is switched from the reference water level to the depressurization reference water level when the depressurization valve is opened.
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