Calculation of energy saving retrofits for counter current cooling towers

This kind of transformation is unreasonable and will not achieve system energy saving. Locally it seems to be energy-saving, but the actual system energy consumption has not been reduced much, in a word, it wastes the head of the pump to drive the turbine. Think about it, the electricity is converted to a water pump, the water pump drives the water, and the water drives the impeller, how many channels are converted, and how much efficiency is left, just calculate it yourself.

Suggestion: directly change the circulating water pump, this energy saving is the right way, can save a lot of energy, do not cancel the cooling tower fan, and then pump the water with the water pump, and then use the water turbine, it is not cost-effective. Companies that understand the integrated energy saving of the system will not use this solution.

If it is your own project, it is recommended to change the plan, if it is for the customer, you do not understand, it is recommended to understand more.

As you mentioned above, using a pump to drive the fan is just transferring the energy consumption to the pump, because our country's designers are not strict in doing waterway design, and they like to add margin; Therefore, some manufacturers are using this to make a fuss, which is actually not energy-saving, and can only be said to be a comprehensive utilization of energy;

There is no national standard in the cooling tower industry, and many manufacturers are roughly estimated and imitated. Canceling mechanical forced ventilation is simply nonsense, and the cooling effect must be poor. Or you can make the tower bigger.

It is suitable for the use of circulating cooling water systems with small and medium-sized water volumes and scattered layout of multiple water sources, and the layout is very flexible and convenient.

1. Standard design conditions: dry bulb temperature, wet bulb temperature 28, atmospheric pressure 99400pa, inlet water temperature 42, outlet water temperature 32;

2. The selection of special packing for stacked high-efficiency round towers enables this kind of cooling tower to achieve the design purpose of compact structure, small footprint, flexible and convenient layout;

3. The airfoil type fasting structure is used with large diameter, large area, low speed and low dynamic pressure FRP fan blades, and the use of this kind of cooling tower has the remarkable characteristics of energy saving and low noise;

4. The ultra-low noise cooling tower is equipped with high-efficiency noise reduction devices at the air inlet and outlet and in the rain area, so that the effective noise reduction of the cooling tower of the same level can reach 5db(a);

5. The application of a large number of high-strength FRP structural parts on this type of cooling tower makes it have the obvious advantages of excellent anti-corrosion performance and long service life;

6. The small cooling tower adopts a rotary water distribution system, which has a simple structure and uniform water distribution, which further improves the thermal performance of the cooling tower, and a fixed water distribution system is used to further improve the stability of the tower body.

7. The rotating water distribution system is equipped with a water baffle device, and the fixed water distribution system is equipped with a water collector device, so that the floating water loss of the cooling tower is reduced to the limit;

8. The round tower structure itself gives it good wind pressure resistance, especially suitable for use in coastal typhoon areas, and the design wind resistance of this kind of cooling tower is up to;

9. Small size, light weight, simple structure, simple installation and maintenance.

The circular counter-current FRP cooling tower adopts counter-current gas heat exchange technology, and the packing adopts high-quality modified polyethylene chloride wave sheets to diffuse the water area; By rotating the water distribution mode, the water distribution is uniform and the cooling effect is enhanced.

It can be widely used in all walks of life, especially for cooling water circulation systems such as air conditioning, refrigeration, air compressor stations, heating furnaces and condensation processes.

Counterflow cooling towerA cooling tower in which the water flows down from the tower, and the direction of the air flow is opposite to the direction of the water flow.

Counterflow cooling tower is the water in the packing of the tower, the water in the tower is reversed from top to bottom, and the air in the tower is reversed from bottom to top, which is both a counterflow cooling tower. Send the water distributor to the top of the tower inside the packing, due to the water.

The temperature is relatively high and can continue to transfer heat to the air.

2. The packing water at the top of the tower is exchanged with the hot gas at the bottom, commonly known as the counter-current section.

When the 3-speed packing reaches the bottom of the sump, the hot water is cooled into cold water, and the counter-flow cooling tower is more efficient than the cross-flow type. 1. The design of the whole set of equipment is simple, the water distribution system is smooth, the whole water distribution process does not need special requirements, and it is not easy to block. A water-spraying filler is used to prevent aging and moisture backflow.

In places where the temperature is relatively low, it is easy to take anti-freezing measures. And multiple cooling towers can be designed to be used at the same time.

2. The design of the whole set of equipment is relatively simple, and the operation is relatively simple. The production cost of the whole set of equipment can be controlled, and it is usually used in some large cooling circulating water.

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

2) The selected finished cooling tower should comply with the "Glass Fiber Reinforced Plastic Cooling Tower Part 2: Large Glass Fiber Reinforced Plastic".

Cooling towers》 GB. 3) If there is a large gap between the design working conditions and the standard working conditions of the low-temperature cooling tower, the heat provided in the product sample should be used.

The force performance curve is selected.

4) The thermal performance curve provided by the manufacturer should be based on the simulation if the test data on the simulation tower is used to organize and draw.

The difference between the test conditions of the tower and the operating conditions of the designed tower, the test data of the simulated tower are corrected, and the correction coefficient is made.

5) The location of the cooling tower should be kept at a certain distance from the building, and avoid being arranged near the heat source, exhaust gas and flue gas discharge port.

6) The circulating cooling water should be free of oil and substances dissolved to FRP, and the turbidity of the water should not be greater than 50mg l. And should be taken.

Algae control and water quality stabilization measures.

7) The design circulating water 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 checked.

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

9) According to the requirements for noise control of civil buildings in the "Environmental Noise Standard for Urban Areas" GB3096-1993, the noise can be passed.

The space attenuation calculation, the selection of low noise or ultra-low noise cooling tower, if still can not meet the environmental noise index, should be further one.

steps to take noise reduction measures.

10) It is advisable to add roof fire hydrants and flushing facilities near the cooling tower as fire extinguishing and flushing water fillers and tower body deposits.

The use of things. 11) The material of the cooling tower should be flame retardant and meet the fire protection requirements, which should be indicated in the main equipment list and the order contract.

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

It is widely used in various sectors of the national economy, and is particularly suitable for cooling water circulation systems such as air conditioning, refrigeration, air compressor stations, heating furnaces and condensation processes.

Rotary water distributor: flexible and reliable operation, low water head, uniform water distribution, aluminum alloy or glass fiber reinforced plastic cloth water gauge chain pipe, the pipe is installed with a water collection plate to overcome the water drift.

A device that cools grinding and material water. The water is exchanged with the flowing air in the heat and the shed, resulting in a drop in the temperature of the water.