Validation of carpark impulse/jet fans

December 14, 2006, 20:54

Hi all,

I am thinking of getting of PHOENICS after hearing many good things. One application of particular interest is if PHOENICS can adequately model the velocity profile of ductless impulse/jet fans in an underground carpark? There is an authority requirement here to model the fan against an actual site installation to see how close the modelled and actual site velocity profile match. I had tried modelling it using FDS but the results deviate a fair bit. For eg. at 15m, the actual velocity is 1.5m/s but FDS gives 4m/s. I think has to be do with the fact that FDS is heavily dependent on cell resolution and you can only model the jet fan to a certain resolution otherwise the entire carpark, which can be 5,000 sqm or more, becomes computationally expensive.

Thanks ya all in advance

Henry Ho Singapore

MarekM · July 5, 2009, 16:14

Hi, I wonder what are your conclusions now after this years. I am user of Phoenics since 2007 and I find myself quite experienced, now... but every new day supprise my a little bit :-) Are your open to exchange your knowledgement? Let me know, please. I believe in Phoenics and it gives me result accurate in 80-90%, that I expect before I start modelling yet.

dhaigude · July 6, 2009, 06:57

but I wonder how u calculate CO concentration in car park area Is there any guideline?

dhaigude · July 6, 2009, 06:59

Quote:

Originally Posted by MarekM

Hi, I wonder what are your conclusions now after this years. I am user of Phoenics since 2007 and I find myself quite experienced, now... but every new day supprise my a little bit :-) Are your open to exchange your knowledgement? Let me know, please. I believe in Phoenics and it gives me result accurate in 80-90%, that I expect before I start modelling yet.

but I wonder how you calculate CO concentration in car park area Is there any guideline?

December 14, 2006, 20:54	Validation of carpark impulse/jet fans	#1
Henry Ho Guest Posts: n/a	Hi all, I am thinking of getting of PHOENICS after hearing many good things. One application of particular interest is if PHOENICS can adequately model the velocity profile of ductless impulse/jet fans in an underground carpark? There is an authority requirement here to model the fan against an actual site installation to see how close the modelled and actual site velocity profile match. I had tried modelling it using FDS but the results deviate a fair bit. For eg. at 15m, the actual velocity is 1.5m/s but FDS gives 4m/s. I think has to be do with the fact that FDS is heavily dependent on cell resolution and you can only model the jet fan to a certain resolution otherwise the entire carpark, which can be 5,000 sqm or more, becomes computationally expensive. Thanks ya all in advance Henry Ho Singapore

July 5, 2009, 16:14	Phoenics gives results that I expected	#2
MarekM New Member Marek Join Date: Jul 2009 Posts: 3 Rep Power: 16	Hi, I wonder what are your conclusions now after this years. I am user of Phoenics since 2007 and I find myself quite experienced, now... but every new day supprise my a little bit :-) Are your open to exchange your knowledgement? Let me know, please. I believe in Phoenics and it gives me result accurate in 80-90%, that I expect before I start modelling yet. A_Prakash likes this.

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July 6, 2009, 06:57		#3
dhaigude New Member Mahesh Dhaigude Join Date: Jul 2009 Posts: 6 Rep Power: 16	but I wonder how u calculate CO concentration in car park area Is there any guideline?