Hi everybody!(adsbygoogle = window.adsbygoogle || []).push({});

I'm currently working on a project where a wet cooling tower is involved. The wet cooling tower is an induced draft system. I know the volume of air handled and also the properties of the air entering and leaving the system.

I want to determine the electricity consumption of the fan depending on these parameters.

I have found two formulas. The first comes from the .pdf "SPX - Cooling tower fundamentals", at the page 58, they present several formulas and there is one to calculate the power output of a fan: spxcooling.com/pdf/Cooling-Tower-Fundamentals.pdf

aph = ( Q * ht * D ) / (33000 * 12)

where:

aph -> air horsepower

Q -> volume of air handled

ht -> total pressure differential

D -> density of water at gauge fluid temperature

But this formula does not determine the electricity consumption of a fan. But the power output of one. Do you know if I can use an efficiency coefficient to calculate the electricity consumption?

Then, I found this website (http://www-old.me.gatech.edu/energy/beth/four.htm#A2), it gives an equation for the fan horsepower:

hp = A * cfm^B

where:

cfm -> air flow rate in the tower

A and B -> constants which correspond to a particular tower box size

What do you think about this equation? It may work, but I have looked for these two coefficients and I still haven't found them.

Thank you for your help.

**Physics Forums - The Fusion of Science and Community**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Electricity consumption of a fan in a cooling tower

Loading...

Similar Threads - Electricity consumption cooling | Date |
---|---|

Help to design/build a table top electric powered winder? | Yesterday at 1:32 PM |

Force from the legs of an electric motor due to torque | Tuesday at 1:29 PM |

What type of motor would have the highest Stalled Torque? | Mar 6, 2018 |

Modeling of two-phase flows in electric and magnetic fields | Mar 3, 2018 |

Power consumption of electric motor | Mar 30, 2011 |

**Physics Forums - The Fusion of Science and Community**