When using metric units, what constant do you use instead of 1.08?

[erowe1111]

I'm updating some calcs to metric units and for the equation Q=1.08*cfm*delta T, and I don't have access to any air density and specific heat values in metric units. Can someone help me out?

 

[gepman]

Try this online calculator

http://www.aoe.vt.edu/~devenpor/tgas/

 

[quark]

Q(W) = 1.23 x V(L/s) x dT (K) at sea level.

[link]Air Properties[/url]

Density of air is reciprocal of specific volume, which you can easily get from a psychro chart.

 

[katmar]

See thread403-203606


Katmar Software
Engineering & Risk Analysis Software

http://katmarsoftware.com

 

[AbbyNormal]

a real anal point is that specific volume tells you the volume of moist air, that holds a unit mass of dry air, plus a small mass of water vapour.

Take the "V" out of HVAC and you are left with a HAC(k) job.

 

[erowe1111]

another question referring to using degrees celsius....

When using bin data in degrees C, is there a standard way to evenly space out the temps? (e.g w/bin data for deg F, there are usually 2.5-5 deg between each temperature)

 

[IRstuff]

2ºC = 3.6ºF



TTFN

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