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박원희,이노갑 한국화학공학회 1971 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.9 No.2
Point bubble frequencies at various positions were measured by use of a electroresistivity probe in a stagnant, concurrent, and countercurrent bubble column. The effect of the water velocity, and distributor on the bubble frequency distributions was observed at various radial positions along the axial direction of the column. A theoretical model to predict the bubble frequency at a given position in the bubble column was proposed and compared with experimental results.
박원희,최인수,이노갑 한국화학공학회 1972 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.10 No.4
The open loop responses of a pilot plant scale long-tube double effect evaporator were studied theoretically and experimentally. Good agreement has been achieved between the experimentally determined response of the evaporator to the step changes in the final product rate and steam rate and the theoretically predicted response. The overall response of the system can be approximately described by the simple overdamped second order transfer function without transportation Lag.