Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
This warning indicates a sizing issue with the entered coil air outlet condition, in this case Tair,out = 12.8 C and w air,out = 0.00828818. These inputs are specified in the Coil:Cooling:Water object. When sizing the water coil, the model looks to find coil surface temperature, or where the air saturation point is on the psychrometric chart. If you draw a line from the air inlet condition to the air outlet condition on a psyc chart, that line should cross the saturation curve (e.g., 100% RH curve). The intersection of the airside line with the saturation curve denotes the dew point temperature of the coil exiting air. If the model cannot find that crossing point, the model will try to adjust the outlet air condition such that the line does intersect the saturation curve.
This warning can be disregarded since the model was able to size the coil. However, if you do not agree with the results you can modify the coil inputs yourself to model a different coil.
| | 2 | No.2 Revision |
This warning indicates a sizing issue with the entered coil air outlet condition, in this case Tair,out = 12.8 C and w air,out = 0.00828818. These inputs are specified in the Coil:Cooling:Water object. When sizing the water coil, the model looks to find coil surface temperature, or where the air saturation point is on the psychrometric chart. If you draw a line from the air inlet condition to the air outlet condition on a psyc chart, that line should cross the saturation curve (e.g., 100% RH curve). The intersection of the airside line with the saturation curve denotes the dew point temperature of the coil exiting air. surface temperature. If the model cannot find that crossing point, the model will try to adjust the outlet air condition such that the line does intersect the saturation curve.
This warning can be disregarded since the model was able to size the coil. However, if you do not agree with the results you can modify the coil inputs yourself to model a different coil.
