This technology is a rainwater collection device and method that uses a support frame installed on a building wall. Multiple inclined screens are inserted into the frame at specific angles to capture wind-driven rain hitting the wall and channel it into a storage tank below.
Due to economic factors, rainwater harvesting systems have primarily been installed in large facilities like gymnasiums or public buildings with roof areas over 1,000㎡. Even then, many large roofs are converted into gardens, significantly limiting the amount of rainwater collected across cities. Existing wind-driven rain (WDR) gauges only monitor small portions of a wall, making it difficult to estimate total rainfall, and there has been a lack of effective systems for collecting rainwater from entire wall surfaces.
This technology features a support frame with multiple coupling grooves cut at preset angles, allowing the spacing between screens to be determined by the groove angle. The support and screens are made of corrosion-resistant materials such as metal, acrylic, or tempered glass. A fixing bar secures the support, and a filter at the storage tank inlet removes impurities. Applicable to high-rise offices, apartments, urban buildings with rooftop gardens, and WDR research facilities, this system allows buildings with small roofs to utilize their large wall surfaces for rainwater harvesting, providing water for landscaping and cleaning while reducing urban flood risks.
This invention was developed with support from the Ministry of Land, Infrastructure and Transport for the evaluation of rainfall-runoff process distortion and increased disaster vulnerability caused by high-rise buildings.
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