Closed Circuit Water Cooling Tower

Water Cooling Chiller

Cooldo Brand closed cooling towers are designed with cooling capacities ranging from 5 to 300 tons/unit/hour. This tower has two separate fluid circuits, one in which the fluid is recirculated on the outside of the second circuit, which is a bundle of tubes through which the hot water is flowing. It's use widely in electronics, instrumentation, textiles, foundry, steel making, forging, petroleum, gas, chemical and automation industries.

Features

1. Cooling capacity ranging: 5ton to 300ton.
2. Space-saving, no need of water pool and cooling tower,moves easily.
3. Energy efficient and environmental protection.

Closed water  cooling tower absorbing heat when the water evaporates to cool the cooled liquid. The cooling performance of a closed circuit cooling tower depends on the ambient wet bulb temperature.Below is two type of closed cooling tower:

1.Cross flow closed type cooling tower

In cross-flow cooing tower,water falling vertical from top tower,outside air via filler horizontal,water fall across the airstream.Advantage as following:

(1)  Low power consumption,excellent of performance of heat exchange.

(2)  Compact structure,Space Saving,less investment of infrastructure.

(3)  Low water loss,economic advantages of using recycled water for cooling.

internal-structure-drawing-of-flow-tower

2.Counter flow closed type cooling tower

In counter-flow tower design, the flow of the air is in the opposite direction of the spray water.

(1) Few cooling blind area,high thermal efficiency.

(2) Design of equipment is compact,automatic digital display,easy to operation and maintain.

(3) The tank of cooling tower adopts closed loop, eliminate clutters go into the tower body to produce spraying blocked;

internal-structure-drawing-of-counter-tower

Overview of water cooling chiller:

 

structure-of-cooling-tower

1.Tower Structure & Shell

The tower shell is made by Magnesium aluminium zinc(POSMAC) panels from korea with superior corrosion resistance. The serice life is 3-6 times than common aluminium zinc plate, with good insulation performance and great heat resistant performance. The casing is complete with maintenance access doors for internal inspection convenience. We also can use stainless steel plate with better performance to make.

2.Cooler

The cooler is core part in closed cooling tower,which made by 304 stainless steel tube or T2-type dephosphorylation red copper pipe. After the completion of cooler welding,all is conducted air pressure to 3.0Mpa and put into testing water trough to conduct pressure maintaining test. The pressure maintaining time is at least 6 hours in order to ensure the pressure-bearing performance of each cooler.

3.Spray pump:

Mass flow and low lift; the impeller use hydraulic model design which have good static and dynamic equilibrium. The SKF bearing and EKK Mechanical seal is from Swedish. Mechanical sealing can avoid water leakage and stand wear and tear,easy to protect and maintain.

4. Air-inlet grille:

LGH is a special and high efficient air-inlet grille, which have the characteristic like mass supply air rat, small wind resistance,lowing the energy consumption of wind resistance, avoiding the water spray out to the site, and also avoiding the sun shine go interior of water channel which can keep spray water temperature and avoid the dust go inside.

Work Pinciple of closed water cooling tower:

 

Pure water in closed type cooling machine for copper coil within cycle, the working fluid heat flow through the coil by coil scattered into the water, at the same time units around the outside the normal temperature air from the air inlet grille into the chassis, and the water flow in the opposite direction, upward flow through the coil,a small portion of water evaporation and heat, saturated hot humid air from the top of the cooling tower fan discharge to the atmosphere, the remaining water into the bottom water disk, the water pump is recycled to the water distribution system and spraying to coil, in order to reduce the temperature of the fluid inside the pipe all kinds of. Hot air of water box not evaporation of the water is water retaining plate interception and through the PVC heat exchange layer, PVC heat exchange layer in which the water is flowing in the air cooling, temperature is decreased. Fall into the water by the water pump bottom plate, is recycled to the water distribution system, back to pour into the coil, so for circulating cooling. This equipment widely used in induction furnace cooling, cold rolling mill, continuous casting cooling, etc.

work-pinciple-of-closed-cooling-tower

Application Of Water Cooling Tower

Closed cooling tower is used widely in various industries,such as electronics, instrumentation, textiles, foundry, steel-making, forging, petroleum, gas, chemical and automation industries etc. Usually,it mianly cooling for air-compressor,injection molding machine,medium frequency melting furnace.

application-of-cooling-tower

Table of parameters of cross flow closed type water cooling tower
Model Fan Spary Pump Connection Pipe (mm) Size (mm) Weight (kg)
 KW m3/h kw m³/h Inlet Outlet L W H Idle Loaded
NCH-5 1.1×2 15000×2 1.5 45 DN80 DN65 2800 1940 2200 1050 1880
NCH-6 1.1×2 15000×2 1.5 45 DN80 DN65 2900 1940 2200 1100 2050
NCH-7 1.1×2 15000×2 1.5 45 DN80 DN80 2900 1940 2200 1150 2150
NCH-8 1.1×3 15000×3 2.2 60 DN80 DN80 3300 1940 2200 1320 2450
NCH-10 1.1×3 15000×3 2.2 60 DN100 DN100 3300 1940 2610 1480 3050
NCH-13 1.5×3 18500×3 2.2 60 DN100 DN100 3300 1940 2780 1480 3080
NCH-16 1.5×4 18500×4 2.2 114 DN125 DN125 4400 2240 2780 2080 4080
NCH-18 1.5×4 18500×4 2.2 114 DN125 DN125 4400 2240 2780 2150 4280
NCH-20 1.5×4 18500×4 2.2 114 DN125 DN125 4400 2240 2940 2180 4480
NCH-22 1.5×4 18500×4 2.2 114 DN125 DN125 4400 2240 2940 2240 4780
NCH-25 1.5×4 18500×4 4 140 DN150 DN150 4800 2240 3100 2520 5080
NCH-30 2.2×4 25000×4 4 140 DN150 DN150 5440 2240 3100 3080 6980
NCH-35 2.2×4 25000×4 4 140 DN200 DN200 5440 2240 3100 3180 7180
NCH-40 4×4 46000×4 5.5 160 DN200 DN200 5900 2600 3669 4980 9080
NCH-45 4×4 46000×4 5.5 160 DN200 DN200 5900 2600 3669 5380 10050
NCH-50 4×4 46000×4 7.5 240 DN200 DN200 6600 2900 3989 6530 11200
NCH-55 4×4 46000×4 7.5 240 DN200 DN200 6600 2900 3989 6680 12100
NCH-60 4×4 46000×4 7.5 240 DN200 DN200 6600 2900 3989 7220 13200
NCH-65 5.5×5 55000×5 5.5×2 160×2 DN200×2 DN200×2 7400 3400 3639 9980 15890
NCH-70 5.5×5 55000×5 5.5×2 160×2 DN200×2 DN200×2 7400 3400 3639 10500 16560
NCH-75 5.5×5 55000×5 5.5×2 160×2 DN200×2 DN200×2 7400 3400 3639 11400 17530
NCH-80 5.5×5 55000×5 5.5×2 160×2 DN200×2 DN200×2 7400 3400 3639 12600 18540
NCH-85 5.5×6 55000×6 7.5×2 240×2 DN200×2 DN200×2 8200 3400 3989 15900 20590
NCH-90 5.5×6 55000×6 7.5×2 240×2 DN200×2 DN200×2 8200 3400 3989 16400 21680
NCH-95 5.5×6 55000×6 7.5×2 240×2 DN200×2 DN200×2 8200 3400 3989 17690 22860
NCH-100 5.5×6 55000×6 7.5×2 240×2 DN200×2 DN200×2 8200 3400 3989 18640 23780
Schematic drawing of cross-flow water cooling tower

schematic-drawing-of-cross-flow-tower

Schematic drawing of counter-flow tower

schematic-drawing-of-counter-flow-tower

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