|January 12, 2013, 23:37||
Hardware to model HVAC performance
Join Date: Jan 2013
Location: Vancouver, BC
Posts: 1Rep Power: 0
I don't know if this question has been answered prior but I am interested in building a PC to model HVAC performance in residential and commercial building.
I want to test different models using:
1) ACCA (Air Conditioning Contractors of America) Manual J,D,S,T standards
2) Energy simulation software such as Energy Plus
3) OpenFOAM CFD software
4) Basic hand calculations
I want to see how closely these different methods of simulating energy loads and estimating equipment specs actually agree. I want to know how reliable the ACCA manuals are to more precise and time-consuming methods.
If I want to model the heat loads on a typical 2500sq ft house or a larger commercial building or even a multi-storey highrise what type of computer system will I need? Or is this even possible with a single workstation.
It has been some time since I used CFD software. The last time was with iDEAS/Fluent on a SGI workstation with 64MB of RAM if that give you an idea.
|January 18, 2013, 18:13||
Join Date: Oct 2009
Posts: 637Rep Power: 14
I can't give you any too specific recommendation, but of course I think the CFD will have the highest requirements in terms of computing power. I don't know about #2, but CFD is usually one of the most demanding softwares...
Today it should not be an issue to get a good workstation. Prices dropped so much, you can even get a 64GB RAM machine for home, by using gaming hardware. And you don't even need to be a millionaire
For this kind of simulation, the 2500sq ft house or maybe a SMALL commercial building, (depending on the detail you want to put in), I would say a usual workstation (let's say 64GB which is pretty convenient with a Sandy Bridge E) would have enough memory to run your kind of simulations. It's just a matter of time. I assume it's steady state since you compare it to hand calculations and similar stuff, so a 6- or -core machine should handle it in a reasonable time (a few hours to a few days). Maybe you can put together a few identical systems if it turns out that running on a single system takes too much time.
For a highrise I would go for a bigger cluster, but you might get the computing power from Amazon or a similar provider. There are plenty out there, just use Google or any other search engine.
Or course it heavily depends on your requirements, so my recommendation is just a rough estimation. Maybe you can do it with less memory, maybe you need more. That depends so much on the detail, if it's steady or transient simulation etc... But I hope you can get the point, CFD can be used for many applications today, without the need for $50 million hardware...
We do three types of jobs here:
GOOD, FAST AND CHEAP
You may choose any two!
|acca, air conditioning, heat, hvac, openfoam|
|Thread||Thread Starter||Forum||Replies||Last Post|
|multiphaseInterFoam for RAS turbulence model||chiven||OpenFOAM Bugs||7||August 23, 2011 02:52|
|Problems bout CFD model of biomass gasification, Downdraft gasifier||wanglong||FLUENT||2||November 26, 2009 00:27|
|help for different between les model (subgrid-scale model)||liuyuxuan||FLUENT||1||October 2, 2009 15:25|
|Grid resolution for full-scale and down scaled model||gravis||Main CFD Forum||0||October 2, 2009 10:27|
|2 stage axial turbine model convergence issues||sherifkadry||CFX||2||September 7, 2009 20:51|