Apparaturs Dew Point Temperature
Apparaturs Dew Point Temperature
(OP)
Dear Experts,
I have the following data for heat load calc using excel sheet.
Outside DB = 38 Deg C
Outside WB = 30.8 Deg C
Outside RH = 60%
Inside Room conditions = 23.5 Deg C, 55% RH
Room Total sensible heat = 10000 BTU/HR
Room Total latent heat = 1800 BTU/HR
There is no mixing of return air with outside air.
How to find the apparatus dew point temperature (ADP)?
Thanks in Advance
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RE: Apparaturs Dew Point Temperature
draw your points (outside conditions, room conditions) and draw vertical line through room state point.
adp will be at intersection of your vertical line and saturation line.
if you use american psychrometric chart, the process is the same, but you are drawing horizontal instead of vertical line.
RE: Apparaturs Dew Point Temperature
RE: Apparaturs Dew Point Temperature
RE: Apparaturs Dew Point Temperature
1) Find points for indoor and outdoor conditions
2) Find SHR and draw sloped line to determine the coil discharge conditions.
3) Draw line from outdoor conditions through coil discharge condition line that will intersect the ADP.
For this particular application, assuming 100% OA (as stated), with no energy recovery, the cooling process is pretty darn close to not being possible....
RE: Apparaturs Dew Point Temperature
RE: Apparaturs Dew Point Temperature
RE: Apparaturs Dew Point Temperature
Without doing someone's homework for them, please help me dust the cobwebs out of my brain on one issue. How do you know the coil discharge temperature unless you know what the bypass factor is? You can determine the SHR line easy enough and take that from the room condition back to the saturation line. But don't you need to know the coil bypass factor in order to know where the cooling process line intersects the SHR line? I suppose if an air flow had been given, the required discharge temperature could be calculated, but no air flow was given in the original question.
Is enough information given in the original question to determine the ADP?
RE: Apparaturs Dew Point Temperature
Sharing knowledge is the best way to learn
RE: Apparaturs Dew Point Temperature
RE: Apparaturs Dew Point Temperature
So again, the thing I can't get past is how do you know the coil discharge temperature based on the information given in the original post?