Fan Manufacturers Bring ‘Air’ of Excitement

February 27, 2001
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ATLANTA, GA — The “air” of new product excitement continued on the ventilation side of things at the Air-Conditioning, Heating, Refrigerating Expo.

In regard to new fan announcements, Hartzell Fan Inc. (Piqua, OH) introduced its Series O3P backward-curved centrifugal fan. It’s manufactured in Class II construction and is available only through the company’s HRS (rotating stock) program, it said.

According to the company, this line offers series from 12 to 33 in., with flow up to 29,000 cfm. Pressure up to 10-in. capability covers the full AMCA Class I and Class II performance range, it said. Other standard features are flanged and drilled inlet and outlet connections, heavy-duty shaft and bearings, and ceramic felt shaft seal to minimize leakage.

Meanwhile, the 8W Multi-Wing fans from Crowley Company (Burton, OH) are designed specifically for cooling applications that demand large volumes at low speed. The company said its product is suited for air-cooled condenser and cooling tower usage.

The fans are available in diameters from 24 to 48 in., with four- or five-blade configurations, a cast aluminum hub, and inch or metric bores. A range of seven pitch settings between 15 and 45 degrees in both clockwise and counterclockwise rotation is another convenience, said the company.

At Greenheck’s (Schofield, WI) booth, a company representative said its new mixed-flow inline fans have been designed to incorporate the primary advantages of both conventional axial and centrifugal fans. The spokesperson said its product has greater pressure capabilities than an axial fan, but higher airflow than a centrifugal unit. Additional benefits include high efficiencies and low sound levels for sound-critical applications.

As with all the company’s fans, the new product includes Green-heck’s universal mounting system for horizontal or inline mounting, and bears the AMCA Sound and Air seal.

Multifan, Inc. (Bloomington, IL) offered axial fans with direct-drive and variable-speed motors. The motor housing is made of cast aluminum with grease-filled ball bearings. The company said its product is noted for its low noise level, too.



Chillers

In regard to chillers, API Ketema (Buffalo, NY), a division of API Heat Transfer Inc., added two new water-cooled packaged chiller models to its range of ACME® refrigeration products. Single-compressor ACME ESW models are now available from 20 to 50 tons, while dual-compressor units run from 40 to 100 tons. Both models use standardized components, including the company’s new compact DXC shell-and-tube evaporator. According to the company, its industrial-duty chillers are designed with flexibility in mind to accommodate a wide variety of applications such as central cooling of machinery, cooling of jacketed tanks, oil cooling, and numerous other applications where heat must be removed effectively to maintain stable operation.

Stulz of North America, Inc. (Frederick, MD) has increased the capacity on its Modular Chiller Series to 75 tons. All are designed to fit through standard doors for easy transport, handling, and new or retrofit installation. According to the company, its chillers are designed to meet the exact cooling demands of medical diagnostic equipment such as MRIs and CAT Scan systems, or any other process equipment requiring fluid cooling. The modular units allow 100% redundancy and standby capacity to meet peak loads.

Dunham-Bush (Harrisonburg, VA) presented its new air-cooled, commercial/industrial, tandem-scroll compressor chillers. The ACDS-A line features its new “DB Director” Windows®-based microcomputer controller with enhanced communications interface. According to the manufacturer, its new chillers offer smaller electrical power requirements, improved efficiency, and low operating sound levels.



Heat Exchangers

In regard to heat exchangers, Colmac Coil Manufacturing, Inc. (Colville, WA) has added heat pipe heat exchangers to its line of products for the air-to-air heat recovery, IAQ, and dehumidification markets. The heat pipe heat exchangers are available with options of tilt or face-and-bypass for temperature and frost control, in-line (wraparound) configuration for enhanced dehumidification, and indirect evaporative cooling. Colmac Coil makes a full range of 1-in. i.d. integral finned aluminum tube heat pipes for the commercial and industrial markets, with standard configurations up to 8 rows deep, 28 tubes high, and 20 ft long.

SWEP (Duluth, GA) is offering a new line of all-stainless, compact brazed heat exchangers (CBEs), containing no copper at all, which are designed to withstand demanding environments and corrosive media. Units are meant to effectively handle a variety of heat transfer media, including: demineralized water for electronics or microchip applications; ammonia for various food processing applications; sulfureous oils; corrosive media used in the pharmaceutical, chemical, and plastics industries; and other media such as corrosive water.

Secespol of Canada Corp. (Mississauga, ON, Canada) presented its shell-and-coil heat exchangers with helically corrugated tubes. According to the company, they offer a high heat transfer rate and self-cleaning features. Other features include vertical installation, cascade connection angle, and tube bundle made of multiple layers in a crisscross pattern.

WTT America (Bohemia, NY) presented its WP24 wide-gap, brazed-plate heat exchanger, which the company said is suitable for applications having larger contaminants in fluids not likely to pass conventional brazed-plate channel sizes. Units offer 1-in. connections, low pressure drop, and capacities up to 5 tons.

Tranter Inc. (Wichita Falls, TX) talked about its Superchanger® plate-and-frame heat exchanger. The manufacturer claimed that the turbulent flow created by corrugated plates in its product results in heat transfer coefficients from two to five times greater than those achieved by shell-and-tube units. Applications for its heat exchanger include cooling tower circuit isolation, water-source heat pump precooling, heating potable water, and waste recovery from overheated areas, it said.



Cooling Towers

In regard to cooling towers, Amcot Cooling Tower Corp. (Rancho Cucamonga, CA) featured its Model ST, a counterflow, fiberglass-reinforced plastic cooling tower. According to the company, it requires a simple foundation, and is capable of multi-directional setup. Tower sizes ranges from 3 to 1,500 tons.

Protec Cooling Towers (Miami, FL) featured its fiberglass cooling towers for commercial, institutional, and industrial applications. According to the company, the towers are corrosion-resistant and require low maintenance. It also said the 360-degree air inlet “offers low air resistance and uses less motor horsepower for electric energy savings.”

Delta Cooling Towers (Fair-field, NJ) singled out its Premier™ induced-draft cooling tower. It said it has corrosion-proof engineered plastic construction and leak-proof molded seamless shell. Delta said it now has cooling towers from 500 cooling tons and up to 2,000 gpm.

Marley Cooling Towers (Over-land Park, KS) said it developed a new generation of its NC cooling tower line. The new NC class “is designed to produce less sound without sacrificing performance,” the company said.

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