NWN series Counter Flow Evaporative Fluid Coolers, a widely used type of closed cooling tower，counter flow closed loop system design, efficient cooling by spraying water continoustly wets the heat exchanger cooling coil ( the hot fluid medium flows in the coil and complete heat exchange to be cool ).
Components Instruction
Axial Flow Fan
Low noise • Small wind resistant • Big air volume • Stable and high efficiency
NWN series closed cooling tower adopts integrated axial flow fan that combined with fan stack and motor ( protection class: IP55, insulation class: F class.),
Cooling coil
High corrosion resistant • High heat exchange performance • Keep the medium clean and make sure the high quality water
Cooling coils as the core parts of closed cooling tower, are maded up of great quality copper coil or steel coil.
Coil inside is through cooling medium, outside is cooled by water spray to meet the cooling requirement.
Aluminium Zinc Plate
High corrosion resistant • Strong thermal resistance • Long service life
Shell plate uses imported aluminium zinc plate, which is one of the strongest corrision resistance plate, service life is 3-6 times of ordinary galvanized sheet.
Construction of closed cooling tower can be upgraded to 304/316 stainless steel plate.
Spray pump
Low noise • Low power • Large flow • Excellent performance
Used great mechanical seal to prevent from the leakage, made by dedicated outdoor motor, and special configuration imported bearings, to ensure that the fan, water pump has long term reliable operation. The pump body is precision casting, strong and long service life.
Drift Eliminator
Low wind resistant • Maximum drift capture • Ensure the high heat transfer performance of cooling system
NWN series closed type cooling tower adopts NEWIN EVD serie drift eliminator which is made of self- extinguishing PVC materials.
EVD series drift eliminators can efficiently remove the exhaust air flow entrained water droplets, low wind resistant, maximum drift capture and recovery 99.99%.
Air Inlet Grille
Anti-corrosion • Anti-ultraviolet • Maintenance- free
Easy disassembled type inlet grille, special 3D stereo 45-degree ventilation channel, greatly improves product and wind load resistance.
Reduce noise and prevent the growth of algea.
Advanced Water Distribution System
Excellent water distribution performance • Easy installation and maintenance
Water spray system uses in a variety of high flow rate and anti clogging basket type nozzles, to ensure the continuous uniform water spraying on the surface of the coil. Under the help of induced air, water can cover all the coils to the utmost extent to do the complete heat exchage among water, air and refrigerant. In this case, heat transfer efficiency will increase dramatically. The nozzle is connected on spray pipe branch. When cleaning, the nozzles and spray pipe branch can be easily dismounted.
Optional Accessories
Noise reduction upgrade / Anti-Freeze heater / Vibration isolator / Stainless steel casing and framework / bolts and nuts (304 / 316)
High-temperature upgrade / Dual-speed Motor & VFD motorAnti-Freeze heater
Application
- HVAC system - Pharmaceutical industry - HVAC system
- Chemical industry - Machinery manufacturing - Metal processing
- Plastic products - Industrial refrigeration - Food processing
TECHNICAL SPECIFICATION OF NWN SERIES COOLING TOWER
设计工况
Design Conditions
进水 Entrance temp. t1= 37℃ 湿球 Wet bulb temp. tWB= 28℃ 大气压力 Atmospheric pressure P0= 9.94 x 104 Pa
出水 Leaving temp. t2 = 32℃ 干球 Dry bulb temp. tDB= 31.5℃
| 型号 Model |
制冷量 Cooling Capacity (Kw) |
风机 Fan Power (Kw) |
水泵 Pump Power (Kw) |
尺寸 Dimension (mm) | 重量 Weight (kg) | |||
| 长度 Length |
宽度 Width |
高度 Height |
净重 Dry |
运行重量Wet | ||||
| NWN-230-Z7-S | 230 | 1.5*2 | 0.75Kw | 2500 | 1100 | 2750 | 2950 | 5000 |
| NWN-290-Z7-S | 290 | 1.5*2 | 0.75Kw | 2500 | 1100 | 2750 | 3150 | 5500 |
| NWN-350-Z7-S | 350 | 2.2*2 | 1.1Kw | 2500 | 1200 | 2750 | 3350 | 6000 |
| NWN-450-Z7-S | 450 | 2.2*3 | 1.5Kw | 4250 | 1450 | 3100 | 4150 | 6800 |
| NWN-600-Z7-S | 600 | 2.2*3 | 1.5Kw | 4250 | 1450 | 3100 | 5550 | 7800 |
| NWN-750-Z7-S | 750 | 5.5*2 | 2.2Kw | 4250 | 1750 | 3520 | 6050 | 8500 |
| NWN-850-Z7-S | 850 | |||||||
| 型号 Model |
管径尺寸 Pipe Size（DN） | |||||
| 进水 Inlet |
出水 Outlet |
自动补水 Auto Feed |
手动补水 Quick Feed |
满水 Overflow |
排污 Drain |
|
| NWN-230-Z7-S | 100 | 100 | 25 | 40 | 40 | 40 |
| NWN-290-Z7-S | 100 | 100 | 25 | 40 | 40 | 40 |
| NWN-350-Z7-S | 100 | 100 | 25 | 40 | 40 | 40 |
| NWN-450-Z7-S | 125 | 125 | 25 | 40 | 40 | 40 |
| NWN-600-Z7-S | 125 | 125 | 25 | 40 | 40 | 40 |
| NWN-750-Z7-S | 100*2 | 100*2 | 40 | 40 | 50 | 50 |
| NWN-850-Z7-S | 100*2 | 100*2 | 40 | 40 | 50 | 50 |
| NWN-1000-Z7-S | 100*2 | 100*2 | 40 | 40 | 50 | 50 |
| NWN-1150-Z7-S | 100*2 | 100*2 | 40 | 40 | 50 | 50 |
| NWN-1300-Z7-S | 100*2 | 100*2 | 40 | 40 | 50 | 50 |
| NWN-1450-Z7-S | 125*2 | 125*2 | 40 | 40 | 50 | 50 |
| NWN-1750-Z8-S | 150*2 | 150*2 | 40 | 40 | 50 | 50 |
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