Posts by Const

Const · Help Me !

I should have asked... What do the four temperatures have to do with the dew point? Or rather, what do they represent in this scenario?

The dryer works with a desiccant rotor. This rotor has a process side, where the wet air is going through to dry, and a regeneration side where hot air is blown through to dry the rotor.
The four temperatures are the temperatures of the air entering and leaving the process and regeneration side.

This might be far too simplistic, but have you tried seeing if the dew point can be the outcome of 4-variable simultaneous equations?
So for instance, with your example:
Test nr. dew point T1 T2 T3 T4
1 -25 10 20 30 40
2 -35 44 88 99 66
4000 -34 12 54 49 5
Could you rewrite these as:
-25 = 10w + 20x + 30y + 40z
-35 = 44w + 88x + 99y + 66z
-34 = 12w + 54x + 49y + 5z
for instance? by solving what your variables (w, x, y, z) are you might find a relationship such that:
D = T1w + T2x + T3y + T4z
Where D is your dew point and T1, T2, T3, T4 are your observed/predicted temperatures?
As I say, it's probably grossly over-simplified, but it's probably worth a try if you haven't? At worst you'd be wasting very little of your time.

D = T1w + T2x + T3y + T4z could be possible but not likely.
There are to many possibilities like: D = T1w² + T2x³ + (T3y - T4z)²....

Therefore I was looking for some kind of program, script or method to automate it.

Thank you for the replys.

Const · Help Me !

Hi,

I'm looking for a method to find a correlation/relation between test data.

I'm simulating a (compressed) air dyer.
I've got a mass load of calculations. Each calculation gives several results.
The first and most important result is the dew point, which represents the humidity of the air.
For each calculation there are also 4 other results: 4 temperatures.

Test nr. dew point T1 T2 T3 T4
1 -25 10 20 30 40
2 -35 44 88 99 66

4000 -34 12 54 49 5

Im looking for a method to (automatically) find the following function PDP = f(T1,T2,T3,T4), or any relation between the four temperature and the dew point.
When the relation is known, then I could predict the dew point when measuring those 4 temperatures.
My simmulation tool is written in Matlab. I would like to write a script that would find met the relation between the temperatures and the dew point.

Thanks for reading ,
Const

Math Is Fun Forum

#1 Re: Help Me ! » Find relation/function/correlation » 2007-11-20 20:23:33

#2 Help Me ! » Find relation/function/correlation » 2007-11-20 03:59:49

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