Normalization of ACH50

asked 2018-11-03 02:39:45 -0600

Siva gravatar image

updated 2019-03-05 06:57:29 -0600

dhollman gravatar image

I want to determine the Air change rate (allowable) for a case which I am modeling in energy plus...

As per standards, we have ACH50 values defined. I want to normalize these values for my case and check whether the Allowable ACH is in limit or not....For this, i should know about the Pressure difference between inside and outside....

C:\fakepath\Zone infiltration.jpg

observe the columns K,L,M,N,O,P,R,T

Column K: AFN Linkage Node Flow rate from Node 1 to Node 2 (Zone 1: Wall 1: Window 1)

Column L: AFN Linkage Node Flow rate from Node 2 to Node 1 (Zone 1: Wall 1: Window 1)

Column M: Node 1 to Node 2 Pressure Difference

Column N: AFN Linkage Node Flow rate from Node 1 to Node 2 (Zone 1: wall 4: Crack)

Column O: AFN Linkage Node Flow rate from Node 2 to Node 2 (Zone 1: wall 4: Crack)

Column P: Node 1 to Node 2 Pressure Difference

Column R: infiltration Volume

Column T: Air changes per hour

Now to calculate ACH which deltaP is to be considered ? Column M or Column P?

edit retag flag offensive close merge delete