Air leaving cooling equipment always 90% ???
Is the air leaving cooling equipment always considered to be at 90% RH?
no,there can be many configurations to change that. one example would be hot gas reheat.
Or gas fired, or electric reheats.
10mm, because it's better than .45acp
The air leaving the evap coil, is always a high RH%.
Yes, even after condensing moisture out of the air, the cold air has contracted (think ice cube on a t*tty) so the moisture that is left takes up a "relative" high amount of
Originally Posted by guitarboyled
space in the cold air - the supply air has moved close to
the Saturation Point Curve of the Psychrometric Chart.
"Those that CAN...teach...
Obviously I was referring to the air leaving the cooling coils before any type of reheat.
From a calculation point of view, do we consider that it's almost always at 90% RH.
For instance is the Bypass factor always between 100% saturation and 90% RH?
From ACCA Manual P (First Edition) pg. 29 it says "In actual practice, a supply air condition which falls on the RSHR (Room Sensible Heat Ratio) line and has a relative humidity between 85% and 95% is a good choice". Also, "A supply condition that falls below the RSHR line can be used, but the room humidity will be lower than the desired design humidity and If a supply condition that falls above the RSHR line is used, the room humidity will be higher that the desired design humidity". I hope this helps.