HVAC Equations
HVAC Equations
(OP)
Hi,
May I know when should I use q = 1.08 x cfm x (Ta-Tb), and when to use q = 4.45 x cfm x (enthalpy A - enthalpy B)?? I am really confused. Please advise.
May I know when should I use q = 1.08 x cfm x (Ta-Tb), and when to use q = 4.45 x cfm x (enthalpy A - enthalpy B)?? I am really confused. Please advise.





RE: HVAC Equations
RE: HVAC Equations
Regards,
Brian
RE: HVAC Equations
RE: HVAC Equations
RE: HVAC Equations
One way to avoid this problem is to use mass flow rate (which of course can't change without violating a few physical laws), the other is to use scfm. Scfm refers to the flowrate of air at standard pressure and temperature. Universally scfm is used to the point where most people don't bother including the 's'.