SPX Cooling Technologies SS-NC-08A specifications Outlet Sound Attenuation, Low Noise Fan

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Marley / NC Class Stainless CoolingTower / Specifications: Options

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Specifications

 

Specification Value

box which is self supporting. The inlet attenuation will not be allowed to impact the thermal performance effi- ciency of the basic tower configuration.

Outlet Sound Attenuation

1.4Add the following paragraph under Base: The cooling tower shall be equipped with outlet sound attenuation baffles positioned and spaced horizon- tally across the entire fan opening. The baffles will be constructed of perfo- rated sheet metal and contained within a steel box which is self supporting and made of the same material as the tower.

Low Noise Fan

1.4Replace paragraph 6.1 with the fol- lowing: Fan(s) shall be propeller-type, incorporating a minimum of seven wide-chord aluminum alloy blades and galvanized hubs. Blades shall be individually adjustable. Maximum fan tip speed shall be 56 m/s. Fan(s) shall be driven through a right angle, indus- trial duty, oil lubricated, geared speed reducer that requires no oil changes for the first five (5) years of operation. The gearbox bearings shall be rated at an L10A service life of 100,000 hours or greater.

6.1(alternate)* Fan(s) shall be propeller- type, incorporating a minimum of seven wide-chord aluminum alloy blades and galvanized hubs. Blades shall be individually adjustable. Fan(s) shall be driven through a one-piece multi-groove, solid back V-type belt, pulleys, and tapered roller bearings. Bearings shall be rated at an L10A ser- vice life of 40,000 hours or greater. *Currently available on Models NC8304 through NC8309.

temperature without sacrificing the system’s ability to maintain a con- stant cold water temperature. This is a relatively inexpensive solution, and can pay for itself quickly in reduced energy costs.

•The most extreme cases may require inlet and discharge sound attenu- ator sections—however, the static pressure loss imposed by discharge attenuators may necessitate an increase in tower size. Two stages of inlet or discharge attenuators supported by the tower and designed and tested for the most stringent requirements are available as an option.

■Falling water sound—unlike counterflow towers which allow the water to free-fall and splash into the cold water collection basin, PVC film- fill crossflow towers have no splashing. This allows a crossflow tower much lower sound levels at the air inlet than a counterflow tower— especially induced draft counterflow towers. Even with the “splash-mat- ting” option in a counterflow cold water collection basin, a crossflow tower air inlet is still quieter. Plus you do not have to worry about clog- ging the splash matting. Yet another maintenance and operation advan- tage of the crossflow configuration.

■NC Class models with the “L” suffix in the model number are the special low sound editions. To achieve the very lowest possible sound levels while maintaining efficiency, the best available combination of motor, gear ratio, fan blade count and blade profile were carefully selected for every “L” model. All “L” models come with the Low-Noise Fan option.

If you choose the sound attenuator option, the fan will automatically change to the Low-Noise Fan option.

■Tip Speed—unlike thermal performance, no certification program exists for sound. While Marley conducts actual sound tests on all its configura- tions there are only

a few ways for the client to ensure they get a quiet tower.

•One is to conduct

a field sound test after installation. On-site testing after installation can however be inaccurate depend- ing on the environ- ment.

•Another is to conduct a sound test at the factory. However both can be cost prohibitive for smaller applications.

•Specifying fan blade tip speed is one way to physically force the tower selection to be quiet. Tip speed is easily checked by multiplying the fan rpm by the fan circumference at the blade tip (π fan dia). Over 61m/s is considered high by most people. 51-61 is considered typical and expect- ed. 41-51 would be considered low noise. Below 41 is difficult to hear above the water noise.

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Contents Marley NC Class Stainless Crossflow Cooling Tower Marley / NC Class Stainless CoolingTower / Contents Marley / NC Class Stainless CoolingTower Specifications Specification Value BaseDesign Loading WarrantyThermal Performance and Efficiency Construction Specifications Mechanical EquipmentFill, Louvers and Drift Eliminators Hot Water Distribution System Casing, Fan Deck and Fan GuardAccess Cold Water Collection BasinConvenience and Safety Options Guardrail and Ladder Ladder Safety CageLadder Safety Gate Ladder ExtensionGuardrail Ladder Extension Interior Mechanical Equipment Access Door PlatformPlenum Walkway Control Options Electric Water Level Control Vibration Limit SwitchBasin Heater Specifications Specification Value Marley Premium VFD System Miscellaneous Options Motor out of the Airstream Fan Cylinder ExtensionsInlet Flow Control Valves Equalizer Flume Weir GatesSound Control Inlet Sound AttenuationOutlet Sound Attenuation Low Noise FanUltra Low-Noise Fan Single Hot Water Inlet Connection per CellAir Inlet Screens High Wind Load/Seismic DesignsExtended Geareducer Lube Line with Dipstick Multicell Basin Equalizer OutletsBasin Sweeper Piping Page Worcester WR3 8AB United Kingdom

SS-NC-08A specifications

The SPX Cooling Technologies SS-NC-08A is a cutting-edge, open-circuit cooling tower designed for a variety of industrial applications. Renowned for its efficiency and durability, the SS-NC-08A exemplifies modern engineering innovations, catering to facilities that require reliable temperature regulation while minimizing water usage.

One of the standout features of the SS-NC-08A is its superior thermal performance. Equipped with advanced fill media, this closed cooling tower optimizes heat transfer, allowing for enhanced cooling capacity in a compact footprint. This makes it an excellent choice for industries such as power generation, petrochemical processes, and manufacturing, where maintaining strict temperature control is essential.

In addition to its thermal performance, the SS-NC-08A is designed with energy efficiency in mind. Featuring a low-sound fan design, this unit minimizes operational noise, making it suitable for urban installations or environments where noise pollution is a concern. The axial fan technology used in the SS-NC-08A is not only energy-efficient but also capable of achieving high airflows with lower energy consumption compared to conventional fan designs.

The SS-NC-08A also integrates advanced corrosion-resistant coatings to prolong its lifecycle and minimize maintenance needs. This characteristic is particularly important for facilities operating in harsh environments with exposure to chemicals or brine solutions. The unit's robust construction ensures it can withstand the challenges of demanding applications, reducing downtime and repair costs.

Another key characteristic of the SS-NC-08A is its modular design. This allows for easy installation, maintenance, and scalability. Whether expanding a facility or replacing older systems, the modular nature of the SS-NC-08A streamlines the process. Additionally, it incorporates a simplified water distribution system that enhances water flow and distribution across the fill.

In conclusion, the SPX Cooling Technologies SS-NC-08A cooling tower stands as a reliable, efficient, and durable solution for various industrial cooling needs. With its advanced thermal performance, energy efficiency, corrosion resistance, and modular design, it addresses the requirements of today’s modern industries, ensuring optimal performance and longevity. This makes it an excellent investment for organizations aiming to maintain efficient operations while adhering to environmental sustainability goals.
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