Cooling tower manufacturer to discuss how to effectively control the cooling tower fan

Cooling tower manufacturer is talked about in the water cooled central air conditioning unit, the use of circulating cooling water is one of the commonly used method. In order to make the unit to heat the water in the cooling cooling again, recycle use, often use the cooling tower. Fan for mechanical ventilation cooling tower of key components, usually adopt outdoor vertical cooling tower dedicated motor, with high efficiency, power saving, good waterproof performance. In cooling tower water drips, cooling fan make contact with the air is full of, pass quantity of heat to the surrounding air, the temperature drop down. As a result of the cooling tower equipment capacity is based on a big in the summer heat load under the condition of selected, is also considering the harsh conditions, however, in actual operation, because of the season, climate, the equivalent thermal load of the workload, and many other factors have decided the unit equipment are often in a run in the case of relatively low thermal load, so the power consumption of the unit is often unnecessary and wasteful. Therefore, the use of frequency control of motor speed control the turning speed of the cooling fan, at night or in low temperature season climate conditions, by adjusting the rotational speed of cooling fan and cooling fan on the Numbers, energy-saving effect is very significant. Energy consumption of cooling water system is one of the important part of total energy consumption of air conditioning system. Adjusted using cut-off valve for cooling water flow rate will lead to unnecessary energy waste, when partial load wrong fixed cooling water flow rate and cooling tower fan motor control will waste a lot of energy. Such as using microcomputer control technology and frequency conversion technology of cooling water system to control the energy saving effect of about 30%, with remarkable energy saving benefits. Especially for hotels, restaurants, shopping malls and other working period longer central air conditioning system, and the south long other building air conditioning system, air conditioning runtime USES air conditioning cooling water system of the running system of investment capital is recovered in 1 ~ 2 years, has a very significant economic benefits. < < br /> < / p> < < br /> < / p> in a typical cooling tower fan control system, frequency converter can use the built-in PID function, can form closed-loop control for temperature controlled object. As shown in figure 1 for typical cooling tower frequency conversion control principle, the function of cooling tower fan is to reduce the water temperature to a certain value, its cooling effect can be done in frequency converter speed adjustment. Accused of quantity ( The water temperature) And the value of the difference after converter built-in PID controller, send speed command and control the output of the inverter frequency, will adjust the speed of cooling tower fan.

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