2011 Volume 46 Issue 1 Pages 43-48
A new dehumidifier has been developed. The essential feature of the device is the geometry of the coaxial laminar flow, which consists of core and sheath air. The device is designed such that the sample air is introduced as a central core with dry sheath air surrounding this central core. As the sample air passes through the diffusion zone, water molecules travel by diffusion from the central core to the sheath air. At the end of the diffusion, zone the dehumidified central core is withdrawn and then introduced into an SPM measuring instrument.
The performance of the device is as follows.
The outlet/inlet humidity ratio is 0.16 at the sample flow rate of 1L/min and 0.29 at the sample flow rate of 2L/min. At the sample air rate of 2-4L/min, the particle loss is less than 3%.
