Architects and engineers working at Armstrong American State University in Savannah, Ga., have put in an aesthetically pleasing ceramic water-cooling tower for the school’s pupil Union and Memorial School Heart that they say will provide heating, ventilation and air conditioning for decades.
The fundamental technology behind this system is fairly low tech: Water is sprayed over ceramic fill material resulting in evaporative cooling. The cooled water is circulated by way of a heat exchanger that is connected to a separate air circulation system. In the case of AASU’s 400-ton system, a single large fan circulates water over a grid of 25,000 tiles.
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The first big distinction between the ceramic-tile fill system and a typical institutional HVAC PVC-fill system is the looks of the equipment, itself. As a substitute of the big and unsightly steel and PVC field techniques discovered on high or outdoors of big workplace buildings and hospitals, designers can create architectural towers that properly mix into the lines of a building and landscaping. As obvious above, the AASU cooling tower turns the set of water streams into one thing that looks extra like a fountain.
But there are additionally some dollar-and-cents reasons why all these cooling towers could or could not make sense. One consideration is the time horizon of the constructing proprietor. Brief term traders may be averse to the additional capital value (some estimates peg the preliminary cost of a ceramic tower at four-instances a regular air-cooled HVAC system). On the other hand, these in it for the lengthy haul, reminiscent of a college or hospital, can justify the preliminary expense of the towers for a number of causes.
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First, the ceramic systems are rugged and impervious to the weather and designed to last 30-40 years. This contrasts with typical air-cooled HVAC programs that require common upkeep and nonetheless must be changed each decade or so because the fill clogs, UV rays degrade the tubing and moisture corrodes the metallic surfaces.
Gary Drummond of Tower Engineering Inc., the cooling tower manufacturer that assisted Rosser architects with the AASU challenge, says ceramic programs maintain a hundred% thermal efficiency for life and are also immune to freeze-thaw cycles and are impervious to biological development and chemical attack.
Drummond says he and others at the company have experience constructing these towers since 1968. The technology really began in 1947 and one of many current innovations is a change to a tile-grid system such because the one utilized in AASU instead of getting the water go over brick-like items. 鈥淲e name it excessive-efficiency ceramic fill because the tile system is far more environment friendly because of elevated wetted floor area and fewer static pressure requirement. We also can use TEI’s variable-velocity fan motor system to offer even more financial savings with less horsepower and less maintenance, he says.
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Hebei LongTime who has been involved with the varsity project for about two years, tells the AASU pupil newspaper that commonplace air-cooled chillers require 1.2 to 1.Three kilowatts of power per ton of cooling, in contrast with ceramic towers that only require 0.5 to 0.7 kilowatts per ton.
A last plus for ceramic fill cooling towers is design freedom. Rosser and TEI tout that these systems easily might be designed round a number of parameter apart from look, including an capacity to withstand hurricanes and earthquakes.
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Drummond says TEI ensures the thermal efficiency of the company’s ceramic fill programs for 25 years. He also notes the tiles and blocks used in the company’s towers aren extraordinary in themselves. He says they are just arduous-burned clay that can be readily equipped via global brick making facilities.
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