Selection of air cooler fans
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This post was last edited by CHUNFEI211 on 2010-4-5 at 13:06. Our company is planning to purchase 2 air coolers, and several manufacturers have submitted their models. I found that the outer surface areas of the ducting used by them are more or less the same, but the motor power of the fans varies; one company chose 2 units with a power of 30 KW, while another company chose 4 units with a power of 22 KW. How can I determine which one is a better choice? Additionally, for air coolers that usually have 6 fans, can 2 fans or 4 fans be turned off during winter operation? If some fans can be turned off, then it might not be necessary to use variable-frequency motors. Could someone with practical experience share their insights?
Different manufacturers may vary to some extent; not only is the motor power different, but the size is likely to differ as well. Because the area includes not only the area of the base tube but also the area of the finned tube. The air cooler must come with a data sheet provided by the manufacturer; otherwise, do not choose it.
2# jlchina The manufacturer provided a data sheet with around 30 pages. What parameters are the most important to look at?
30 pages show that the manufacturer you chose is good. I generally focus on the following aspects: 1. Physical property data: whether the basic data is correct, including the fouling coefficient. 2. Air parameters: whether the outlet air temperature, altitude, and air humidity are correct. 3. The model and design of the air cooler. 4. Parameters of the core tubes and finned tubes. 5. Fan parameters, including air volume, power, and efficiency. 6. Safety factors. 7. Heat transfer coefficient
Regarding the selection of fans, each designer relies on their own calculation data and layout plans; it would be best to have a design institute assist in evaluating which option is the best； Frequency conversion is implemented to help users save electricity and facilitate centralized control; it is recommended to use this option ； If the system’s outlet temperature is not high, it is possible to turn off some of the fans when the ambient temperature is low.