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Montreal, May 1, 2007 - Dectron Internationale (TSX: DTL):, a leader in the heating, ventilation and air conditioning, indoor air security and water generation markets, is pleased to announce its financial results for the fiscal year ended January 31, 2007 (in thousands of Canadian dollars) ...
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| Dectron DRY-O-TRON |
August 13, 2003 |
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Strict Budget Doesn't Thwart Engineer's State-Of-The-Art Design of H.S. Natatorium.
Tens of thousands of dollars saved with air distribution design, equipment placement and other factors.
Linwood, N.J.- Budgetary restraints were challenging, but they didn't foil attempts by engineers, architects and contractors to construct a state-of-the-art natatorium for Mainland Regional High School in the Atlantic City, N.J. suburb of Linwood, N.J.
Funded by a closely watched public referendum, the $2.9 million Community Aquatic Center addition was part of a very budget sensitive $10.6 million Mainland Regional update that included classrooms, existing building modernizations, and other improvements.
"The challenge in the natatorium was to provide a high performance dehumidification, heating, and cooling system that also met the client's energy efficiency and budgetary requirements," said Michael Toy, P.E., PhD., chief mechanical engineer for mechanical/electrical/plumbing consulting engineering firm, Concord Atlantic Engineers Inc., (CAE), a five-year-old, West Atlantic City, N.J. company that evolved from the former, well-known Harold Cohen Associates, Pleasantville, N.J.
One example of cost cutting is Toy's choice of putting the pool space's Dry-O-TronÒ RB-150 heat recovery dehumidifier, manufactured by Dectron Internationale, Roswell, Ga., on the 11,000-square-foot natatorium's roof. With school building costs surpassing $250/sq. ft., the roof placement of the dehumidifier saved the school district more than $25,000 in mechanical room space.
Safety also is a key issue in the roof placement of the dehumidifier package, which includes an on-board natural gas-fired boiler option. Keeping combustion away from chemicals and flammable gases commonly used with indoor pools also eliminates premature boiler burner corrosion.
Besides removing 150 pounds of moisture/hr. to maintain a comfortable 50 to 55-percent relative humidity, the Dry-O-Tron also heats the pool water to 80°F and cools or heats the pool area to a design temperature of 82°F.
The energy a pool loses through evaporation represents approximately 95% of its annual water-heating requirement. The Dry-O-Tron captures this heat as a by-product of the dehumidification process and creates a thermal flywheel returning the energy lost through evaporation back into heating the pool water. This process's energy cycle is 100-percent efficient since all the moisture is converted into sensible heat for recycling. Furthermore, the electrical energy required to operate the system is also converted into sensible heat and contributes to space heating. The whole system's energy is recycled. All of these set points are monitored and controlled through an on-board microprocessor controller that interfaces with the school's existing Tracer System building automation system by Trane, Tyler, Texas.
The air distribution, which consists of five 24-inch-round galvanized steel duct runs that reduce down to 14 inches to shave metal costs, was closely integrated into the natatorium's indirect lighting scheme that was designed to cut glare. The duct was strategically located to blend into the ceiling and reflect the ceiling fixture lamps based on a photometrics analysis test. The indirect lighting treatment effectively cuts pool surface glare while simultaneously squeezing out the most watts per fixture.
The ductwork also reflects light because of the off-white epoxy chosen to camouflage it in the ceiling. Additionally, the epoxy coating was field-applied internally and externally for corrosion resistance by Liber Rich & Sons, Pleasantville, N.J., a division of PSE&G Energy Technologies, Newark, NJ, and its subcontractor, Kiker Sheet Metal Corp., Pleasantville, N.J. Liber Rich, the project's mechanical contractor, installed the dehumidifying equipment and manufacturer's representative Sass, Moore & Associates, Woodbury, N.J. helped with the equipment start-up and calibration.
The return air ductwork is hidden in two wall chases with 16ga. galvanized steel grills by Ruskin, Kansas City, Mo. mounted 18-inches off the floor. Each return delivers 7,500 cfm of air back to the dehumidifier, which in turn is mixed with minimum of 4,400 cfm of outside air in accordance with standards of the American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE), Atlanta, Ga.
Toy's design combined with Dectron's dehumidifying equipment has been a big hit at the school. "My experiences in the past have found indoor pools to be extremely hot and humid," said Dr. Ed Coyle, superintendent for Mainland Regional's school district. "I was surprised to find out how comfortable a pool area could be. The room and water temperatures always seem to be in balance. Our swimmers are very pleased with the pool and deck area."
Other equipment on the project includes a 650mbh. Lochinvar Corp., Nashville, Tenn., back-up boiler for pool water heating and Trane rooftop air conditioners for separate locker room hvac. "In a pool project, I always try to separate things like mechanical rooms and locker rooms from the pool air," Toy said.
Other cost cutting measures instituted by CAE and project architect, Faridy Veisz Fraytak, PC, Trenton, N.J., include the limitation of windows normally found in natatoriums. With its low insulation value, glass attracts more moisture than masonry materials and presents more of a cooling and heating load on the HVAC equipment. The reduction of windows in the design resulted in smaller sized equipment that will in turn generate less operational costs.
All players in the project feel confident they gave the school district the best value for its dollar while not sacrificing functionality. "The key to this project was to cut costs wherever possible in order to add as many of the school district's wish list items as possible," added Toy.
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