Recent content by rolinger

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    Rotary air compressor and vortex tubes questions?

    Thanks for responding, I too was wondering why no one was doing so. I suppose questions 2 & 4 are all I need answered at this point. My application is really about cooling with a vortex tube, but since that seems to be the easy part, the issue becomes getting the right kind of compressor...
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    Rotary air compressor and vortex tubes questions?

    Hello, below are some specs I was provided of a micro screw air compressor, its physical dimensions are 4x4x4 and it seems pretty impressive for its size. However I am trying to understand a few things about the data that was provided. I am provided 6 charts on power/airflow/psi etc, each...
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    Calculating Airflow and Pressure in a Fan-Funnelled Tube: Is There a Formula?

    I had to put some of this on hold as business travel got in the way. But I am back on it now. I have been researching different centrifugal fans and air compressors. I will look into centrifugal pumps now too. Ultimately, I need to generate a minimum of 70 PSI...but hopefully something...
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    Heating/cooling a volume of air.

    Some more info to assist the question: I have a fan that disperses air at 8 CFM, the air is heated to 80 F. Assuming a fully insulated box that is 5'x5'x3 = 75 Cubic Feet. Thus 75CF / 8CFM = 9.3 minutes to heat, but this basic equation doesn't take into account the existing temperature of the...
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    Calculating Airflow and Pressure in a Fan-Funnelled Tube: Is There a Formula?

    Thanks for everyones responses. I have found some pretty high outputted computer type axial cooling fans that claim 200+ CFM. The power consumption is as low as 30 watts for these fans too. The centrifugal fans can do about the same but also claim a higher PSI. Understanding this CFM vs...
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    Heating/cooling a volume of air.

    I have a box that is 5'w x 5'l x 3.3'h and the air temperature within the box is 60F. If I have a device that can heat the air in the box to 80F in 7 minutes, then what formula could I use to determine how long it would take that same device to heat a box exactly 3 times the size of the first...
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    Calculating Airflow and Pressure in a Fan-Funnelled Tube: Is There a Formula?

    I looked into centrifigul fans. I am not certain I understand how it would be better than an axial fan. The axial fans consume way less power, have a smaller foot print, weigh less but have way more SCFM airflows. I am assuming that a higher airflow CFM means that the fan is going to have...
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    Calculating Airflow and Pressure in a Fan-Funnelled Tube: Is There a Formula?

    Is there any kind of formula that exists or I can put together that will allow me to determine airflow from a fan being funneled into a tube that decreases in size over the length of the tube? Something specifically that would allow me to determine the air pressure (psi ?) coming out the end of...
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    How Can I Power Two Motors with Different Requirements from One 110V AC Outlet?

    So is watts DC math any different from watts AC ? Watts DC = Volts x amps (12 Volts x 3.3 amps = 39.6 watts) Would the second device simply be: Watts AC = Volts x Amps (120 volts x 0.57 amps = 68.4 watts) The second device "advertises" 37 watts with a pull of 0.57 amps off of a...
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    How Can I Power Two Motors with Different Requirements from One 110V AC Outlet?

    Hello all. First thing I have to say is I don't understand much about power and electricity conversion rates. But I do have a need to have two different motors, each requiring a different power load, to run off of a single source AC 110 house outlet. First device: Volts: 12, Amps: 3.3, uses...
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    Vortex tube application question

    Locating inexpensive vortex tubes Hello. I came across this old thread and want to know if you or anyone here has been able to locate inexpensive vortex tubes. Most websites sell them for over $100 (metal) for the smallest 2 CFM models. Someone here also mentioned you could possibly use a...
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