NECN is a special evaporative condenser, which is characterized by its counter flow heat transfer ( the opposite flow direction of air and refrigerant steam). This design allows for fuller heat exchange between air and refrigerant steam inside the condenser, thereby improving condensation efficiency.
Advantages
· Counter flow heat transfer, Higher condensation efficiency
Efficient condensation performance specially in hot and humid conditions.
· Closed circuit system, Energy saving and Environmental protection
Keep media clean, reduce water consumption and maintenance cost, longer equipment service life.
· Compact structure design, High Strength and Convenient
Small occupation area, Convenient to the shipment, Ease of installation and maintenance.
When NECN evaporative condenser is in operation:
The condensing coil is the main channel of refrigerant steam, which condenses the refrigerant steam into liquid by the way of evaporating and absorbing heat by spraying water. At the same time, the axial flow fan provides forced convection, which causes the air to form a counter flow inside the condenser and exchange heat with the refrigerant steam, so that to achieve efficient condensation performance.
| Series | Type | Capacity | Fan Drive System | Condensation |
| NECN | Counter Flow | Range | Axial fans | Condensing coil |
| Fuller heat exchange | 40~4000kw | Provides forced convection, which causes the air to form a counter flow inside the condenser | The main channel of refrigerant steam. | |
| Counter flow heat exchange, Closed circuit system | High efficiency, Energy-saving and Environmental protection | |||
| Application | Refrigeration, Air conditioning, Chemical industry, Medicine and other fields. | |||
Axial Flow Fan
Adopts cooling tower special aluminum alloy axial flow fan,forward type blade structure design, small wind resistance, big air volume, low noise, good performance, high efficiency. Streamline high strength fan stack ensures airflow uniform through the fan inlet and outlet area, maximum reduce the energy consumption. Fan motor's protection class: IP55, Insulation class: F class.
Drift Eliminator
Adopts NEWIN made EVD series drift eliminator, advanced self-extinguishing PVC material. Special flow flute design changes the air flow direction, small wind resistant and effectively remove from the wet air moisture in the air, reduced the drift loss below 0.001%, maximum save the water, what's more, to make sure the area around cooling tower no pollution, and prevent from the germs spreading.
Water Distribution System
Spray system adopts SPJT pressure type nozzles, provide a fine and dense liquid mist under the pressure action of water pump, large spray area and evenly distribution.
Condensing Coil
Adopts 304 stainless steel coil, high anti-corrosion. Special coil set design, improving heat transfer performance. * Coil materials: SUS 304/316, Copper or Galvanized steel for option.
Air Inlet Grille
Easy disassembled type design. Special 3D stereo 45 degree ventilation channel, greatly improving product rigidity and wind load resistance. It reduces noise and prevents the growth of algae and it is anti-corrosion, anti-ultraviolet and maintenance free.
Heavy-duty Construction
Modular structure, adopt the high quality of Z700 galvanized anti-corrosion plates, strong corrosion resistant NWN-Armour plate or SUS 304/316 plate for option.
About NWN-Armour plate
That is the galvanized steel panel with NWN-Armour anti-corrosion coating have excellent resistance and corrosion resistance approaching the characteristics of stainless steel. A cost-effective alternative to Stainless Steel 304.
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Options |
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► Noise reduction upgrade |
►Anti-Freeze heater |
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►Vibration isolator |
►Stainless steel casing and framework / bolts and nuts (304 / 316) |
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►High-temperature upgrade |
►Dual-speed Motor & VFD motor |
Table1.Technical Specification
| Item | Heat Rejection Capacity | Dimension (mm) | Axial Fan | Spray Pump | NH3 Ammonia Charge | Weight (kg) | |||||
| Model | (KW) | Length | Width | Height | Air Volume (m³/h) | Power (Kw)x Qty | Flow (m³/h) | Power (Kw) | (kg) | Dry | Wet |
| NECN-40 | 40 | 1150 | 900 | 1920 | 10500 | 0.55 | 14 | 0.75 | 8 | 350 | 600 |
| NECN-64 | 64 | 1150 | 1150 | 1920 | 13050 | 0.75 | 14 | 0.75 | 9 | 400 | 700 |
| NECN-80 | 80 | 2000 | 1150 | 2200 | 26100 | 0.75*2 | 30 | 1.1 | 11 | 520 | 1000 |
| NECN-120 | 120 | 2000 | 1150 | 2200 | 26100 | 0.75*2 | 30 | 1.1 | 13 | 570 | 1100 |
| NECN-160 | 160 | 2500 | 1150 | 2200 | 36600 | 1.1*2 | 40 | 1.5 | 18 | 650 | 1600 |
| NECN-200 | 200 | 2500 | 1150 | 2350 | 36600 | 1.1*2 | 40 | 1.5 | 28 | 750 | 1700 |
| NECN-280 | 280 | 2500 | 1400 | 2650 | 40600 | 1.5*2 | 40 | 1.5 | 41 | 850 | 1800 |
| NECN-320 | 320 | 2500 | 1400 | 2650 | 40600 | 1.5*2 | 60 | 1.5 | 43 | 1050 | 2000 |
| NECN-400 | 400 | 2500 | 1400 | 2650 | 46900 | 2.2*2 | 60 | 1.5 | 45 | 1250 | 2300 |
| NECN-480 | 480 | 2500 | 1400 | 2650 | 53000 | 2.6*2 | 60 | 1.5 | 65 | 1350 | 2400 |
| NECN-560 | 560 | 3000 | 1400 | 2850 | 63800 | 3.5*2 | 65 | 2.2 | 65 | 1650 | 3000 |
| NECN-640 | 640 | 3000 | 1400 | 2850 | 90000 | 4*2 | 65 | 2.2 | 81 | 1850 | 3300 |
| NECN-800 | 800 | 3000 | 2180 | 2850 | 90000 | 4*2 | 110 | 3 | 83 | 2050 | 3800 |
| NECN-1000 | 1000 | 3518 | 2180 | 3250 | 110000 | 5.5*2 | 110 | 3 | 109 | 2450 | 4300 |
| NECN-1200 | 1200 | 3518 | 2180 | 2850 | 150000 | 7.5*2 | 110 | 3 | 120 | 3150 | 4300 |
| NECN-1400 | 1400 | 4010 | 2980 | 3910 | 180000 | 7.5*2 | 170 | 5.5 | 142 | 3700 | 7100 |
| NECN-1600 | 1600 | 4010 | 2980 | 3910 | 220000 | 7.5*2 | 170 | 5.5 | 166 | 4180 | 7600 |
| NECN-2000 | 2000 | 4510 | 2980 | 3910 | 300000 | 11*2 | 170 | 5.5 | 220 | 5050 | 8900 |
| NECN-2400 | 2400 | 7036 | 2180 | 2850 | 300000 | 7.5*4 | 220 | 3*2 | 237 | 6300 | 8600 |
| NECN-2800 | 2800 | 8020 | 2980 | 3910 | 360000 | 7.5*4 | 340 | 5.5*2 | 283 | 7400 | 14200 |
| NECN-3200 | 3200 | 8020 | 2980 | 3910 | 440000 | 7.5*4 | 340 | 5.5*2 | 330 | 8360 | 15200 |
| NECN-4000 | 4000 | 8020 | 2980 | 3910 | 600000 | 11*4 | 340 | 5.5*2 | 438 | 10100 | 17800 |
Table 2. Heat Emission Correction Index for R717
| Condensing Temp. (°C) | Air Inlet Wet Bulb Temp. (°C) | ||||||||||||
| 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
| 30 | 1.4 | 1.51 | 1.63 | 1.79 | 1.99 | 2.24 | 2.56 | 3 | |||||
| 32 | 1.18 | 1.25 | 1.32 | 1.43 | 1.55 | 1.7 | 1.88 | 2.11 | |||||
| 34 | 1.02 | 1.07 | 1.12 | 1.19 | 1.28 | 1.36 | 1.48 | 1.61 | 1.8 | 2.06 | |||
| 35 | 0.95 | 0.99 | 1.03 | 1.08 | 1.15 | 1.23 | 1.3 | 1.39 | 1.53 | 1.69 | 1.9 | 2.15 | 2.47 |
| 36 | 0.89 | 0.92 | 0.96 | 1.01 | 1.07 | 1.13 | 1.2 | 1.28 | 1.39 | 1.53 | 1.7 | 1.91 | 2.17 |
| 38 | 0.78 | 0.81 | 0.83 | 0.86 | 0.9 | 0.94 | 0.99 | 1.05 | 1.12 | 1.21 | 1.31 | 1.44 | 1.59 |
| 40 | 0.7 | 0.72 | 0.74 | 0.76 | 0.8 | 0.83 | 0.87 | 0.91 | 0.96 | 1.02 | 1.09 | 1.18 | 1.29 |
| 42 | 0.63 | 0.64 | 0.66 | 0.68 | 0.71 | 0.74 | 0.76 | 0.8 | 0.84 | 0.88 | 0.93 | 0.99 | 1.06 |
| 44 | 0.56 | 0.58 | 0.59 | 0.61 | 0.63 | 0.65 | 0.67 | 0.7 | 0.76 | 0.76 | 0.79 | 0.83 | 0.86 |
Table 3. Heat Emission Correction Index for R22 &R134a
| Condensing Temp. (°C) | Air Inlet Wet Bulb Temp. (°C) | |||||||||||||
| 10 | 12 | 14 | 16 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 28 | |
| 29 | 0.86 | 0.94 | 1.03 | 1.15 | 1.37 | 1.43 | 1.55 | 1.68 | 1.92 | 2.1 | 2.52 | 3.1 | ||
| 31 | 0.77 | 0.83 | 0.9 | 0.99 | 1.1 | 1.17 | 1.24 | 1.34 | 1.47 | 1.62 | 1.83 | 2.1 | 2.48 | |
| 33 | 0.69 | 0.73 | 0.79 | 0.86 | 0.94 | 1 | 1.02 | 1.1 | 1.2 | 1.28 | 1.4 | 1.56 | 1.75 | 2.38 |
| 35 | 0.62 | 0.66 | 0.7 | 0.76 | 0.83 | 0.86 | 0.9 | 0.93 | 1 | 1.07 | 1.18 | 1.25 | 1.38 | 1.68 |
| 37 | 0.57 | 0.6 | 0.63 | 0.67 | 0.72 | 0.76 | 0.78 | 0.82 | 0.85 | 0.9 | 0.96 | 1.02 | 1.1 | 1.3 |
| 39 | 0.55 | 0.57 | 0.59 | 0.62 | 0.65 | 0.68 | 0.7 | 0.72 | 0.75 | 0.79 | 0.84 | 0.88 | 0.95 | 1.1 |
| 41 | 0.48 | 0.49 | 0.52 | 0.54 | 0.57 | 0.59 | 0.61 | 0.63 | 0.66 | 0.68 | 0.71 | 0.75 | 0.78 | 0.9 |
| 43 | 0.44 | 0.46 | 0.48 | 0.5 | 0.52 | 0.54 | 0.55 | 0.57 | 0.59 | 0.61 | 0.63 | 0.66 | 0.68 | 0.75 |
| 45 | 0.41 | 0.42 | 0.44 | 0.46 | 0.48 | 0.49 | 0.5 | 0.52 | 0.53 | 0.55 | 0.56 | 0.58 | 0.61 | 0.66 |
Instructions for Selection
1. Confirm condensing temperature, wet bulb temperature.
2. Calculate total heat abstraction amount that goes through system to condensers.
3. Take a reference to below Table 2. or Table 3., select heat abstraction amount correction index.
4. Total amount of heat abstraction multiplies heat correction index equals to the condensing load during the working conditions.
5. Take a reference to Graph Specification sheet, select the heat abstraction amount data which is bigger or equivalent tothe data after correction.
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