8. Join points M and ADP.
9. Find the off-coil condition W by measuring the length of the line M-ADP and multiply this by the cooling coil contact factor..
On a full size CIBSE psychrometric chart this measures 75mm.
The cooling coil contact factor is 0.8. ……….. therefore; 75mm x 0.8 = 60mm.
Measure down along the line M-ADP by 60mm.
This determines point W.
10. Plot the supply air condition S.
The reheater process will be a horizontal line from point W to point S.
Point S is on the room ratio line.
The supply air temperature is 17oC.