Fan parameter design issues
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The resistance in a piping system is the static pressure, while fan manufacturers generally provide the total pressure of the fan. How is this total pressure determined?
How are the total pressure and static pressure of a fan defined? _Baidu Knows: https://zhidao.baidu.com/question/434550373.html. The total pressure and static pressure of a fan are defined in accordance with the national standard GB/T 1236-2000. This is somewhat different from the general concept that total pressure = static pressure + dynamic pressure. However, when it comes to the total pressure of a fan, it refers to the fan’s ability to increase the wind pressure and flow rate of the fluid; this point needs to be clearly understood. It’s not just a matter of total pressure = static pressure + dynamic pressure. Thus, we can understand that fan total pressure = total pressure at the fan outlet minus total pressure at the fan inlet. Total pressure at the fan inlet = static pressure at the fan inlet + dynamic pressure at the fan inlet, while total pressure at the fan outlet = static pressure at the fan outlet + dynamic pressure at the fan outlet. Therefore, fan total pressure = (static pressure at the fan outlet + dynamic pressure at the fan outlet) – (static pressure at the fan inlet + dynamic pressure at the fan inlet). These values can be measured using appropriate instruments. Based on the definition, fan static pressure = fan total pressure – fan dynamic pressure. Fan dynamic pressure is defined as the dynamic pressure at the fan outlet; hence, fan static pressure = (static pressure at the fan outlet + dynamic pressure at the fan outlet) – (static pressure at the fan inlet + dynamic pressure at the fan inlet) – dynamic pressure at the fan outlet = static pressure at the fan outlet – static pressure at the fan inlet – dynamic pressure at the fan inlet