Counterflow cooling tower type characteristics and design points Factory Suppliers Manufacturers Quotes

Counterflow cooling tower type characteristics and design points

Counterflow Cooling Tower Type Features


1. Water in the cooling tower packing, water from top to bottom, air from bottom to top, the two flows to the opposite of a cooling tower.


2.  counterflow cooling tower thermal performance is good, divided into three cooling sections:

① the water distributor to the top of the filling space, the water temperature in this section is relatively high, so the heat can still be transmitted to the air.

②fill water and air heat exchange section.

③ The cooling tower fills to the space of the water collecting tank, and the water is cooled in this section and is called "tail effect". The water temperature in northern China can drop by 1-2°C. In summary, countercurrent tower

Compared with the cross-flow tower under the same conditions, the packing volume is about 20% smaller, and the heat exchange process in the counter-flow tower is more reasonable and the cold efficiency is higher.


3. counterflow cooling tower water distribution system is not easy to plug, watering filler to keep clean and not aging, moisture backflow is small, antifreeze and ice measures easier. Multiple units can be designed in combination. In winter, the required water temperature can be combined with single or all fans.


4. counter-current cooling tower construction installation and maintenance easy, low cost, commonly used in air conditioning and industrial large, medium-sized cooling circulating water.


Counterflow Cooling Tower Design Selection


1) The cooling tower should be high in cold efficiency, energy saving, low noise, light weight, small size, long life, simple installation and maintenance, less floating water.


2) The finished product cooling tower shall comply with the requirements of GB 7190.2-1997 of "Glass fiber reinforced plastic cooling tower Part 2: Large glass fiber reinforced plastic cooling tower".


3) If the design conditions are different from the standard operating conditions of the low-temperature cooling tower, the heat and force performance curves provided in the product sample shall be selected.


4) The thermodynamic performance curve provided by the manufacturer, such as the use of experimental data on the simulation tower, should be based on the experimental conditions of the tower and the design tower operation.


The difference in conditions was corrected for the experimental data of the simulated tower, and the correction coefficient was 0.80 to 1.00.


5) The location of the cooling tower should be kept at a certain distance from the building, and should be arranged near the heat source, exhaust gas and smoke exhaust outlet. If the above requirements cannot be met, technical measures should be taken and thermal performance be checked at the same time.


6) Circulating cooling water should not contain oils and substances that erode FRP. The turbidity of water should not exceed 50mg / L. And should take algae and water quality stability measures.


7) The designed circulating water volume should not exceed the rated water volume of the finished cooling tower. If the circulating water volume does not reach 80% of the rated water volume, the selected cooling tower water distribution system should be used.


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8) The number of cooling towers should match the number of air-conditioning refrigeration units.


9) According to the noise control requirements for civil buildings in the "urban area environmental noise standard" GB3096-1993, low noise can be selected through spatial attenuation calculation of noise.


Or ultra-low noise cooling towers, if still can not meet the environmental noise indicators, noise reduction measures should be further taken.


10) Roof fire hydrants and flushing facilities should be added near the cooling tower as fire extinguishing and flushing fillers and deposits inside the tower.


11) The material of the cooling tower should be flame-retardant and meet the fire protection requirements. It should be indicated in the main equipment table and ordering contract.


12) When selecting a finished cooling tower, attention should be paid to the coordination and coordination of electrical controls.


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