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Harvesting active condensation—Pearl Brewery, San Antonio, Texas

Pearl Brewery, San Antonio, Texas, USA.
29˚ N Latitude. Elevation: 650 feet (198 meters).
Average humidity 54.9%.
Average annual rainfall 30 inches (762 mm).
Average annual humidity 54.9%…

Active condensation occurs on mechanically cooled surfaces (surfaces cooler than the air temperature)—where a generated power source such as electricity is needed to cool the surface on which the atmospheric water (moisture in the air) condenses. That condensation can be harvested by directing the condensate drain to where the water can be utilized as a resource.

Water feature at Pearl Brewery in San Antonio, Texas supplied solely by roof runoff and air conditioning condensate from the brewery’s roof. Overflow water is directed to planted acequias (water channels for irrigation) that cool and beautify the landscape (see next photo). Design and photo by Ten Eyck Landscape Architects.
Planted acequias receiving roof runoff and air conditioning condensate just before they overflow to San Antonio River (seen in upper right quarter of photo). Design and photo by Ten Eyck Landscape Architects. Pearl Brewery, San Antonio, Texas.

The first active condensate recovery systems from air conditioners and other refrigeration appliances in San Antonio have worked so well that San Antonio became the first city to require  new commercial buildings design drain lines so that condensate can be captured and reused on site (OSA 34-274.1 Condensate Collection).

See here for the ENERGY costs of condensate and other waters,
and information on how the refrigerant in air conditioners, refrigeration units, freezers, and ice machines is a major contributor to climate change

For more case studies of condensate harvesting and other free, on-site waters…

See the new, full-color, revised editions of Brad’s award-winning books
– available a deep discount, direct from Brad:

Active SystemsCondensate Harvesting