simulation code for air conditioner

Posted by nikos on September 13, 2006, 9:00 am

Hi

I'm working on an academic project that aims to improve the energy
efficiency of a simple split-unit air conditioner (e.g. what people
would have in their houses)

As a first step I'd like to get a "feel" of the physical problem using
computer simulations. Since the refrigeration cycle (evaporator,
compressor, condenser, expansion valve) isn't really trivial to derive
from scratch, I wonder if anyone has heard of computer software that is
ready to offer such (dynamic) simulation of the INTERNALS in the air
conditioner (I'm not interested in the room dynamics for the time
being). It doesn't have to be really detailed, just capture the main
effects.

I have searched these groups and found references to some old programs
but now they've all turned shareware. Since this is a student project
I'm trying to find something free or inexpensive!

Another possibility would be a sample flowsheet that can be loaded to
either AspenPlus or HYSYS, since we have both these tools at college

Any tips or links will be appreciated
thanks
nikos

Posted by Abby Normal on September 14, 2006, 8:18 am

nikos wrote:

> Hi
> I'm working on an academic project that aims to improve the energy
> efficiency of a simple split-unit air conditioner (e.g. what people
> would have in their houses)
> As a first step I'd like to get a "feel" of the physical problem using
> computer simulations. Since the refrigeration cycle (evaporator,
> compressor, condenser, expansion valve) isn't really trivial to derive
> from scratch, I wonder if anyone has heard of computer software that is
> ready to offer such (dynamic) simulation of the INTERNALS in the air
> conditioner (I'm not interested in the room dynamics for the time
> being). It doesn't have to be really detailed, just capture the main
> effects.
> I have searched these groups and found references to some old programs
> but now they've all turned shareware. Since this is a student project
> I'm trying to find something free or inexpensive!
> Another possibility would be a sample flowsheet that can be loaded to
> either AspenPlus or HYSYS, since we have both these tools at college
> Any tips or links will be appreciated
> thanks
> nikos

A book called Heating and Cooling of Buildings by Kreider and Rabl used
to come with a disk. I think one program on the disk used to simulate
and R22 vapour compression cycle.

Posted by nikos on September 15, 2006, 6:22 am

Abby Normal wrote:

> A book called Heating and Cooling of Buildings by Kreider and Rabl used
> to come with a disk. I think one program on the disk used to simulate
> and R22 vapour compression cycle.

thanks for that, looks like the program is available for downloading
too:
www.hcbcentral.com

Posted by Abby Normal on September 15, 2006, 4:29 pm

nikos wrote:

> Abby Normal wrote:

> > A book called Heating and Cooling of Buildings by Kreider and Rabl used
> > to come with a disk. I think one program on the disk used to simulate
> > and R22 vapour compression cycle.

> thanks for that, looks like the program is available for downloading
> too:
> www.hcbcentral.com

You're welcome, thanks for digging up the link to the softawre

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