Alfa Laval’s Niagara Wet Surface Air Coolers (WSAC®) are designed to be reliable, compact, cost-effective, and highly efficient closed-loop cooling and condensing systems. Alfa Laval Niagara WSACs are used in a variety of demanding applications because to their well-known efficiency and durable design. Their outstanding cooling capability and low water usage make them a popular choice for applications requiring low-temperature process optimization.
Alfa Laval Niagara custom-designs cooling and condensing systems with closed loops. These units use minimal water and power while providing high cooling capacity, thanks to Alfa Laval’s WetSurface technology. Because of its strong simplicity, the design requires little maintenance and provides continuous thermal performance. An Alfa Laval Niagara WSAC’s process stream is impervious to contaminants because it is a closed loop system. Our WSAC systems can be customized to meet your specific requirements, such as resisting corrosive media, cooling several process streams at the same time, or operating in dry or wet cooling mode.
Niagara Wet Surface Air Coolers (WSAC) Application
Alfa Laval WSAC systems are the best choice for closed-loop cooling and condensing in industrial applications because to their efficient and cost-effective operation and robust architecture. The WSAC beats traditional aircooling systems in cooling and condensing a wide range of fluids. WSAC systems are designed to meet the demanding requirements of customers in the power, process, refinery, wastewater, natural gas, and petrochemical industries.
Benefits
- Creates the process output temperature as close to the ambient wet bulb temperature as possible using a single approach.
- Makeup can be applied using low-quality water. When using existing blowdown or wastewater streams, no additional fresh water is required.
- Lower makeup and blowdown requirements, as well as longer concentration cycles, conserve more water.
- A 100% prime surface and minimal fouling due to the absence of plastic fill ensure reliable operation.
- A remote basin for spray water collection and storage, such as a surface-mounted tank or a subterranean sump, allows for easier installation on elevated structures.
- Durable construction that requires little maintenance
- Its strong build and simple layout make it ideal for industrial situations.
Technical data
Tube bundle options
| Tube bundles | | Straight through/cleanable | | Serpentine |
|
| Code designs | ASME, PED |
| Material options | C.S., S.S., Exotics |
Structure options
| Metal | Heavy duty 10-12 gauge carbon steel, H.D.G.A.F.,
stainless steel optional |
| Concrete | Poured in place reinforced concrete |
| FRP | Fiberglass reinforced plastic |
Fan system options
| Fans | | Direct drive 5 ft (1.524 m) diameter and smaller | | Gear drive 6 ft (1.8288 m) diameter and larger |
|
| Motors | Totally enclosed fan cooled (TEFC) |
Spray system
| Design | Low pressure/high flow design for drenching coverage |
| Coverage | 8-10 GPM/ft2 spray water coverage |
| Nozzles | Quarter turn, quick disconnect for easy install/clean out |
| Pumps | | Centrifugal end suction | | Vertical turbine |
|
Ancillary components
| Electrical options | | Complete in-house electrical design | | Custom control panels | | PLC/HMI programming |
|
| Skids | | Pump skids with available redundancy | | Water treatment skids | | Complete pre-wired systems with controls |
|
| Access packages | Ladders, walkways, platforms |
Working principle
The heat exchanger’s closed-loop construction keeps the process liquid or vapour moving through the tubes while the air and water used for cooling do the same outside.The tubes are used to force air downwards. As air floats downward, so does water. The gushing water is a result of heat being released into the process stream. In order for water to vapourize, heat must be transferred from the falling water to the flowing air. For maximum elimination of free water, the air stream is turned to turn 180 degrees. To lessen the need for recirculation, fans propel air vertically at high speeds.
Designs
Each Alfa Laval WSAC system is tailor-made to provide optimal performance in a particular setting. WSACs can be mounted on raised pipe racks, in a wet/dry configuration, in a field-erected configuration, or in a packaged form, all depending on the requirements and desired performance. The expected lifespan of any WSAC is twenty years or more.
Niagara Wet Surface Air Coolers Leaflet
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