WATER SUPPLY SYSTEM AND METHOD

摘要

A water supply system supplies water to a water distribution system that draws a variable flow of water. To counteract micro-organisms silver is released into the water by pair of silver electrodes in a water conduit of the supply system. A parameter is measured that is indicative for water flow rate through the conduit. The average electric current supplied to the silver electrodes is controlled in proportion to the measured water flow rate. The polarity of a voltage difference applied between the silver electrodes is repeatedly reversed. To control the time of reversal a charge is computed that has been cumulatively applied to the silver electrodes since a previous polarity reversal of the voltage difference. The polarity of the voltage difference is reversed when the computed charge has reached a predetermined threshold.