a system for producing potable water and electrical power utilizing the difference in temperature between ambient air and deep , cold ocean water is disclosed . cold water from depths of 2000 feet or more is pumped to a liquid / gas heat exchanger in the upper portion of a hollow cylinder . ambient air currents are concentrated and diverted into the exchanger , becoming cooler and denser . moisture condensing from the ambient air onto the cool surface of the heat exchanger is collected and channeled to storage or piped to shore . the air gains velocity before reaching a wind turbine near the bottom of the cylinder . this turbine is connected to a generator to extract the wind energy . this extracted energy is converted to electricity by the generator and sent to shore .