This article has been viewed 32,396 times. BHP=MHP*(1/(fan efficiency)) Horsepower (HP): Horsepower is the motor size. After you have done that, average all of those readings in order to accurately measure air speed. Electric Motor Application, Design To create this article, volunteer authors worked to edit and improve it over time. HP=BHP*(1/(motor efficiency)) else Pf = Pressure, lb/ft2 Pw = Water Gauge, Inches Now you simply measure the difference between the liquid height on both sides of the manometer in order to measure the total pressure. document.write('
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\n<\/p><\/div>"}, https://www.asi.k-state.edu/doc/dairy/fans-airflow-vs-static-pressure.pdf, https://www.explainthatstuff.com/anemometers.html, https://www.mathsisfun.com/geometry/circle-area.html, https://nemionline.org/wp-content/uploads/2017/06/Air-Flow-Formulas.pdf, https://en.wikipedia.org/wiki/Industrial_fan, consider supporting our work with a contribution to wikiHow. }, © Copyright 2000 - 2020, by Engineers Edge, LLC www.engineersedge.com All rights reserved It is a function of the BHP and the motor efficiency. Equation: P = (Q x p)/(229 x ) or. { GD&T Training Geometric Dimensioning Tolerancing The other end of the manometer must be placed at the end of the fan outlet. We use cookies to make wikiHow great. Fan Brake Horsepower at Dead Head dR3w (Mechanical) (OP) 23 Apr 04 20:48. This equation does not compensate for temperature, density or airflow charateristics of any particular fan or blower. Engineering Book Store If you really can’t stand to see another ad again, then please consider supporting our work with a contribution to wikiHow. Fans are provided in HVAC and Refrigeration systems to distribute conditioned air, to provide ventilation or to exhaust un-wanted air. (Velocity pressure excluded). wikiHow is a “wiki,” similar to Wikipedia, which means that many of our articles are co-written by multiple authors. ; It is a function of the BHP and the motor efficiency. Being able to properly calculate fan power is important for many different applications, whether you are calculating the power of an industrial fan or a household fan. Please help us continue to provide you with our trusted how-to guides and videos for free by whitelisting wikiHow on your ad blocker. wikiHow is a “wiki,” similar to Wikipedia, which means that many of our articles are co-written by multiple authors. First we need to convert the horsepower to watts. document.write('
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