Relationship of absolute dehumidifying capacity and ambient

Drying curves for Rosahl dehimidifying membranes

Absolute dehumidifying capacity

As an example, we consider a size 10 membrane M-10J1R. The published capacity of this device is 29g/day. This is based on ambient conditions of 30° C and 60% RH. Under these conditions, the absolute humidity is 19.1g/m3 (from tables)

The M-10J1R membrane capacity of 29g/day changes as temperature and humidity change as follows:

At 30℃・40％RH

Absolute moisture is 12.7g/m3 → 29*(12.7/19.1) =19.3g/day membrane capacity

At 30℃・90% RH

Absolute moisture is 28.6g/m3 → 29*(28.6/19.1) =43.4g/day membrane capacity

At 20℃・60％RH

Absolute moisture is 10.5g/m3 → 29*(10.5/19.1) =15.9g/day membrane capacity

At 40℃・60% RH

Absolute moisture is 33.2g/m3 → 29*(33.2/19.1) =50.4g/day membrane capacity

Summary

At 30℃, when RH is higher than 60% the membrane will remove more moisture, and when RH is less than 60% it removes less moisture than the published capacity

At 60% RH, when temperature is lowerer than 30° C the membrane removes less moisture, and when temperature is above 30° C it removes more moisture than the published capacity