Condensate is formally defined as a liquid that has been formed by the cooling and subsequent phase change of a gas or vapor. In the field of heating, ventilation, and air conditioning, condensate specifically describes the liquid water that accumulates as humid air passes over a cold cooling coil, which must then be collected and drained away. In the petroleum and natural gas industry, condensate refers to a low-density liquid hydrocarbon mixture that exists as a gas in underground reservoirs under high temperature and pressure, but condenses into liquid form when brought to the surface under normal atmospheric conditions. In steam-powered industrial plants and chemical processing facilities, condensate represents the purified water recovered from steam after it has passed through turbines or heat exchangers, which is routinely recycled back into boilers to save energy and water. Across all these technical domains, the core definition remains consistent: it is the resulting liquid product derived from the condensation of a gaseous substance when thermal energy is removed.
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