| Title |
Comparative Study of Fluidized Bed-type and Assmann Psychrometer |
| Keywords |
Psychrometer ; 습구온도계 ; Wet-bulb temperature ; 습구온도 ; Fluidized bed ; 유동층 ; Saturation temperature ; 포화온도 ; Measurement ; 측정 |
| Abstract |
The present work proposed a newly developed fluidized bed-type psychrometer that could be applicable to the high temperature and contaminant gases. The psychrometer is a device that test gas passes through the water in a glass bottle as a bubbly flow to obtain the adiabatic saturation temperature. A fluidized bed-type psychrometer was made and its characteristics were compared with the Assmann Psychrometer. The characteristic time was in the order of a hundred seconds, and decreased for the decrease of the mass of water and the increase of the air flow rate. The air flow rate and the insulation of the glass bottle were definitely important in the accurate measurement of the wet bulb temperature. The error in wet bulb temperature became less than 5 percent of the difference of dry and wet bulb temperatures if the air velocity in the glass bottle was greater than 1.5m/s. |