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LABORATORIES: SOLVING THE CHALLENGE OF WATER During the day, this evaporative cooled rainwater is pumped throughout the building to fan coil units to provide sensible air conditioning for the building and equipment for much of the year, without running compressors or traditional chillers. HIGH-SPEED HAND DRYER The Most Revolutionary Hand Dryer on the Market Today! americanspecialties.com 56 COLLEGE PLANNING & MANAGEMENT / APRIL 2013 According to the EPA, a single device using this process, known as single-pass cooling, can waste more than 700,000 gal. of fresh water every year. Using a water-to-water heat exchanging system that can provide cool water to the equipment or process at the appropriate temperature, pressure, and ﬂow rate can eliminate single-pass cooling using tap water. A system like this isolates laboratory equipment from the building's chilled water loop, with a secondary closed loop of cool water, and then uses the main building chilled-water loop to reject the heat outdoors. The equipment heat is then removed from the lab space using the building's process cool-water loop. This type of heat exchanging system protects the equipment from potential problematic characteristics of the coolwater loop that may operate at pressures, temperatures or water quality that is not optimal or appropriate for the lab equipment. Advantage is also taken of the cool-water loop's positive characteristics including high efﬁciency, low maintenance, low ﬁ rst cost, and redundancy. California Institute of Technology: Revolutionizing Laboratory Cooling The California Institute of Technology (Caltech) has taken a revolutionary approach to cooling buildings using captured rainwater for its newly renovated Linde + Robinson Environmental Science Laboratory building. This high-tech laboratory building is capturing water from rain and air-handling unit condensation and storing the water in an underground tank. Then, at night, when the outside air temperature is cool, the building pumps the captured rainwater throughout a cooling tower that uses natural evaporative cooling to reduce the water temperature to below 60°F. During the day, this evaporative cooled rainwater is pumped throughout the building to fan coil units to provide sensible air conditioning for the building and equipment for much of WWW.PLANNING 4EDUCATION.COM