• on Miscellaneous Electronics
  • Published in issue 3/2003 on page 0
About the article

Cooling Fans

a backgrounder on fan selection

The total cooling requirements are critical to operate any heat-wasting system efficiently. A good way to prevent huge repair bills is to provide operating conditions that maximize the performance and life of all components in the system.When making the selection of the fan motor for ordinary use, the following methods are used.1. Determine the amount of heat generated inside the equipment.2. Decide the permissible temperature rise inside the equipment.3. Calculate the air volume necessary from equation.4. Estimate the system impedance in the unit.5. Select the fan by performance curve shown in the manufacturer’s catalogue or data sheet.The volume of air flow required to cool an equipment can be determined if the internal heat dissipation and the allowable total rise in temperature are known, see Figure 1.
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