How to Measure and Calculate Vacuum Cleaner Suction Power in Watts?

Question

Hello, How to calculate the suction power of a vacuum cleaner (or how to measure it) to get the power given in Watts?

Szybki Elektron · Accepted Answer

Unfortunately, the 2300mm water column is 22,554,674 Pa The calculations must take into account that the air flow should be given at a given negative pressure. Producers may overstate it by specifying free movement - this value looks better.

Anonymous · Answer

Suction power? It does not work like that. Ie you can count the amount of air drawn in per minute. You can measure the pressure. But you can't put it on power. It depends on the type of turbine, blade angle, angular velocity.

Radzimir85 · Answer

I need this information for a couple of vacuum cleaner models. Unfortunately, the manufacturer does not provide such data. Is there anyone who could check this parameter for me?

Anonymous · Answer

The air flow can be checked with a foil bag of known capacity. Pressure nir is also a problem. All you need is a piece of plastic and a force gauge (or weights). And what do you need this data for?

Radzimir85 · Answer

I have data from the manufacturer for air flow and pressure.
I need a suction power in Watts so that I can relate to competing devices.
Previously, this parameter was not needed by anyone, until suddenly everyone asks for it.

bearq · Answer

What are these vacuum cleaners? Enter their full name

bearq · Answer

Unfortunately, I did not find anything at home.
The effectiveness of the vacuum cleaner is described by the following
parameters (which manufacturers should take into account on
nameplates, and what is usually not
do):
- air flow in cubic meters per second (m3 / s)
- air flow velocity in meters per second (m / s)
- suction power, negative pressure (also the height of the water column), in Pascals (Pa)

cleaning power [air watts] = air flow [m3 / s] × suction [Pa]

Radzimir85 · Answer

I found the following data:
- air flow in cubic meters per second: 32 l / s = 0.032 m3 / s
- air velocity in meters per second (m / s)
- suction power, negative pressure (also the height of the water column), in pascals 2300 mmH2O = 22554 680.39 Pa

Therefore:
cleaning power [air watts] = 0.032 m3 / s × 22 554 680.39 Pa = 721 749.77 W

Something's not working out. From what I read, vacuum cleaners reach a maximum of 500W

dzi_dziuś · Answer

Comparing the data you provided (32 l / s) with the service data of zelmer vacuum cleaners, I can say that 32 l / s is not a big deal. It is quite sufficient for effective cleaning, although in Zelmer machines this parameter reached 38l / s.

Radzimir85 · Answer

After correcting my error, it still comes out of 710.47 W. The vacuum cleaner has a 620 W motor, so this calculation at first glance seems to be far from the truth.
The manufacturer gives the air flow of 44 l / s at the inlet to the engine and 31.5 l / s through the suction nozzle. However, they agree that the negative pressure is given as a constant value of 2300 mmH2O.
Can you recommend someone from the Tri-City area who would take such a vacuum cleaner, did the appropriate tests and gave the correct values?

Added after 5 [minutes]:

Today I do not mean the debate which vacuum cleaner is better and which is worse. As I wrote, the manufacturer gives the air flow of 44 l / s at the inlet to the engine and 31.5 l / s through the suction nozzle. Maybe the zelmer gives a value of 38 at the inlet to the engine. I don't know and I'm not going to compare myself with the competition here.
I just mean having real data so as not to mislead customers.

Anonymous · Answer

First of all, air is not a liquid to apply the formula pressure x efficiency = power ... Secondly, the vacuum cleaner produces the maximum negative pressure at the flow = 0. At full flow, the vacuum = 0 Both maximum values never occur together ... Knowing the performance dependence of pressure, you can reliably calculate the power 'carried' by the air stream, but you have to use the thermodynamic formulas , fans etc ... Nonsense, everything can be counted, you only need to have input data ... Secondly, a turbine is a machine that converts thermal energy into mechanical Use a professional language, not an amateur-commercial one, because comedies are created ... It is certain that without even knowing what it is called, you will not calculate anything ...

Radzimir85 · Answer

Is there any way to measure this?

Oprysk Stonki · Answer

Vacuum gauge.

Radzimir85 · Answer

The negative pressure is known. At least at some point ... It's 2300mmH2O

pawem1 · Answer

See here is the characteristics of the vacuum cleaner blower motor http://dev.ametekfsm.com/Bulletins/116119-00.pdf
if you divide l / s and kPa by 2 and multiply the results together, you will get more suction power, i.e. Air Watts, i.e. 31.5 l / s * 0.5 * 23 kPa * 0.5 = 181.125 Air Watt + -

Here are pdf characteristics of several vacuum cleaners www.ces.clemson.edu/courses/me322/pdf/vacuum also almost simple graphs.

Converter: (Air Flow (in CFM) x Vacuum (in inches of water lift)) / 8.5 = Air Watts

This whole Air Watt, i.e. the suction power, is rather just an advertising gimmick.

Anonymous · Answer

My friend! Wikipedia claims that Turbine (Latin for turbo, storm, tornado) - a flow engine that uses the energy of the flowing fluid to generate mechanical energy. The rotor interacting with the fluid are specially shaped blades. So not the thermal energy (because there is no difference whether the liquid / gas flowing through the turbine is 100,000 ° C or -273 ° C) but the kinetic energy of the gas / liquid. Greetings.

Anonymous · Answer

If you are considering, for example, a wind turbine, then it is.

kura13 wrote:
because it makes no difference whether the liquid / gas flowing through the turbine is 100,000 ° C or -273 ° C

This is where you are so wrong.
In addition, the flow device in the vacuum cleaner is the reverse of the turbine and this was my main message that you did not even catch. But there is a 'propeller' that is a turbine for amateurs :D

Added after 3 [minutes]:

pawem1 wrote:
This whole Air Watt, i.e. the suction power, is rather just an advertising gimmick.

This parameter characterizes the energy flow carried by the air forced through the vacuum cleaner. It can be said that this is such an advanced parameter that for amateurs it abstractly seems to be nothing important.

Radzimir85 · Answer

On this page 295 Air Wats are listed with this vacuum cleaner. Could this be a real value? So much time has passed and the value searched for remains a mystery: /

How to Measure and Calculate Vacuum Cleaner Suction Power in Watts?

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