Compressor

Guys, I want to know if Matlab 7.7 has some compressor model? I read that a eps folder should be necessary, but I just can't find it and I don't know how to install it either. I also read that it is only available in older versions of Matlab, I need to install an old version to use this, isn't there an other way of doing this?

[Walter Roberson]

Is this perhaps a Simulink related question?

[Danilo NASCIMENTO]

yes, this is in simulink.

[Walter Roberson]

Which kind of compressor are you looking for? Something similar to http://www.mathworks.com/help/toolbox/physmod/simscape/ref/controlledpneumaticflowratesource.html

Or http://www.mathworks.com/products/aerotb/demos.html?file=/products/demos/shipping/aero/astsswt.html

[Danilo NASCIMENTO]

No,I want a compressor model that it is inside esp fold from simulink. This way: http://www.youtube.com/watch?v=7hf3XuvAxMs

Answer 1

[Walter Roberson]

This appears to be a reference to http://www.aaronklapheck.com/intermediate_thermodynamics.html which refers to a professor's files http://www.aaronklapheck.com/Downloads/Thermodynamics_2/ESP.zip . The note there says it only works on MATLAB 7.0.1 or earlier.

If I understand correctly, ESP was created by a professor and was not shipped by MathWorks, which is why you cannot find it in your distribution or the documentation.

If you do choose to download it, decompress it in to a directory under your account, and add the name of that directory to your matlabpath, perhaps by using addpath() .

I do not have Simulink, or a release of MATLAB that old, so this is not something I have the facilities to debug.

[Danilo NASCIMENTO]

If I am using an older version of Matlab, I put in the console

addpath 'path' an does it going to appear a folder of eps together with simulink, aerospace blockset, communications blockset and so on?

[Walter Roberson]

Yes.

You may wish to use pathtool instead of addpath . addpath is temporary; pathtool allows you to save the path.

[Danilo NASCIMENTO]

Ok. What I wanted to do is use a DC motor and control the velocity of this motor, this way I can connect this dc motor to the compressor and vary the rate of air leaving it.

[Walter Roberson]

Dunno. Sounds like a Controlled Pneumatic Flow Rate Source block to me.

[Danilo NASCIMENTO]

I guess the temperature of the air out of the compressor is higher than when it is entering it and that is no option of observing this using this controlled pneumatic flow rate source block.

[Walter Roberson]

Sorry, this is beyond my experience.

[i621148]

Check this paper done with published MATLAB source code:

DESIGN AND PREDICTION OF TEMPERATURE DISTRIBUTION OF PISTON OF RECIPROCATING AIR COMPRESSOR Bhaumik Patel1, Ashwin Bhabhor2

http://www.technicaljournalsonline.com/ijaers/VOL%20I/IJAERS%20VOL%20I%20ISSUE%20III%20APRIL%20JUNE%202012/151.pdf