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misterio
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Join Date: Jan 2008
Posts: 8

Psychrometric Chart

03/16/2008 8:13 AM

can i use the pyschrometric chart for 100KPa, even if the air is blown thru fan?

the air pressure increases when blown by fan, right?

will there be a [B]difference [/B]in change in enthalpy? (for charts at 100 Kpa and at higher pressure, with same dry and wet temp)

:wall:
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Codemaster
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#1

Re: Psychrometric Chart

03/17/2008 4:54 AM

I would say yes. 100kPa (assuming you mean absolute, not gauge) is about atmospheric pressure. A fan only likely to raise this by about 1kPa (depending on fan type) so doesn't make a big difference.

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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

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Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
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#2

Re: Psychrometric Chart

03/17/2008 5:51 AM

To a good first approximation, yes.

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misterio
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Join Date: Jan 2008
Posts: 8
#3

Re: Psychrometric Chart

03/17/2008 6:22 PM

the fan that i will use is from the window-type air con running at 1050rpm. do you think that using the 100Kpa chart is still a good approximation?
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