Abstract:

A new type of internally cooled dehumidifier based on the plate-fin heat exchanger (PFHE) was designed，the mathematical model of the dehumidification process was established.The temperature and absolute humidity of the air distribution within the dehumidifier was discussed.Effects of internally cooled on solution temperature and mass transfer driving potential was discussed.The results present that the internally cooled dehumidification could effectively inhibit desiccant temperature increasing in dehumidification process，but only have little effect on mass transfer driving potential.In the typical operation condition，the average temperature of solution in internally cooled dehumidifier is 4.83℃ lower than that in adiabatic dehumidifier，and integral average moisture difference in internally cooled dehumidifier is 0.38 g•kg-1 higher than that in adiabatic dehumidifier.