Cooling tower is the use of water as a circulating coolant, from a system to absorb heat from the atmosphere to the atmosphere to reduce the water temperature of the device; the cold is the use of water and air flow contact after the hot and cold exchange to produce steam, steam evaporation to take heat to evaporate Heat dissipation, convective heat transfer and radiation heat transfer and other principles to disperse the industrial or refrigeration air conditioning generated by the waste heat to reduce the water temperature of the evaporative cooling device to the normal operation of the system, the device is generally barrel, named cooling tower The
Cooling tower is a comprehensive product integrating aerodynamics, thermodynamics, fluid science, chemistry, biochemistry, materials science, static, dynamic structural mechanics, processing technology and other disciplines. Water quality is a multivariable function, and cooling is a multi-factor, multivariable and multi-effect synthesis process.
The purpose of fan control and management is to realize the closed-loop automatic control of fan operation. According to the needs of production in advance to set the water temperature, climate climate by the impact of water temperature, the system heat transfer conditions on the impact of water temperature, with the temperature sensor measured in response to the measured value, ** end through the regulation of cooling equipment Consumption to stabilize the water supply temperature, to achieve self-control energy. It is generally believed that "frequency control technology" is the ideal way to accomplish the above process.
But the frequency control technology in the circulating water cooling tower fan control on the use of the following limitations and defects:
① "frequency control technology" can be very high temperature control accuracy, but this is not very important in the circulating cooling water system.
② the energy loss of the inverter itself (the average operating efficiency of less than 90 **) affect the energy saving effect.
③ variable speed operation caused by fan blades to change the angle of attack (wind angle), the fan from the operating point of the operation to reduce efficiency.
④ motor from the rated speed of low-speed operation, as well as speed, torque, power consumption between the non-linear relationship, but also to greatly reduce the operating efficiency of the motor.
⑤ frequency control system price is more expensive (about 1,000 yuan per kilowatt), new construction and transformation of old equipment need to be greater investment.
⑥ design must also consider the frequency converter running at some specific speed when the destructive resonance problem, and the frequency converter to produce strong electromagnetic pollution on other instruments such as interference
For more information, please visit our website: www.coolingtowerfiller.com, or contact us with E-mail, our E-mail address is rask@coolingtowerfiller.com, you can also chat us straightly on whatsapp: 008618330029204
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