Innovative frost protection

An innovative and inexpensive method of protecting crops from frost has been developed in Uruguay. The Selected Inverted Sink (SIS) system can be operated manually, making it accessible to farmers in developing countries.
SIS consists of a type of chimney two to three metres tall and usually built from canvas or steel sheets, with vents in {mosimage}An innovative and inexpensive method of protecting crops from frost has been developed in Uruguay. The Selected Inverted Sink (SIS) system can be operated manually, making it accessible to farmers in developing countries.
SIS consists of a type of chimney two to three metres tall and usually built from canvas or steel sheets, with vents in its base. A motorised fan inside the tower sucks up the cold air near the ground and expels it hundreds of metres higher up, dispersing it into the warmer air far above the tree tops.
The developer of the system, Prof Rafael Guarga, a hydraulics engineer at the State University of Uruguay, has to date patented two models: One powered by a 50-horsepower motor and a smaller, 15-horsepower version, which can be operated by a tractor engine, or even manually.The SIS is cheaper to run than most other methods of frost protection. It costs about 15 USC per acre/hour, compared to heater-based systems which can cost as much as $30/acre/hour.
The larger model costs around $12,000 in Uruguay, but can be considerably cheaper if only the propeller is imported from the manufacturers, Frost Protection Corporation (FPC) in California, while chimney and motor are manufactured locally.
Prof Guarga won a Rolex Award for Enterprise for his invention, and the efficacy of the SIS has been independently verified by Uruguay’s National Institute of Agricultural Technology.
Outside Uruguay, the system is in operation in California, USA, Argentina, Chile and France.
FPC: Info@frostprotection.com Tel +598 2 9023908
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