scholarly journals Experimental Study of Actual Water Level and Steam Purity in Boiler Steam Drum

1972 ◽  
Vol 7 (3) ◽  
pp. S15-S25
Author(s):  
Toshiho Goto ◽  
Masami Sasaki ◽  
Toshikazu Nakanishi ◽  
Tuyoshi Kadota ◽  
Yasuhiro Kanzaki
Keyword(s):  
Experimental Study ◽  
Water Level ◽  
Steam Drum

Design of Fuzzy PID Controller for Water Level of Boiler Steam Drum Based on DSP

2011 ◽  
Vol 130-134 ◽  
pp. 3455-3458
Author(s):  
Yuan Fang Xin
Keyword(s):  
Control System ◽  
Fuzzy Control ◽  
Water Level ◽  
Pid Controller ◽  
Good Control ◽  
Fuzzy Pid ◽  
Control Effect ◽  
Fuzzy Pid Controller ◽  
Steam Drum ◽  
Pid Arithmetic

A control system for water level of boiler steam drum based on DSP microprocessor is designed in this paper. The technique of fuzzy control was applied to controlling the water level of the steam drum, the operational principle and application of the fuzzy-PID arithmetic are described. The water level controller with good control effect is developed. Firstly the hardware structure of system is introduced in the paper and then investigates the fuzzy-PID arithmetic carry out, and finally, the simplified program flowchart are given.

An Experimental Study of Liquid Entrainment by Rapid Surface Swelling of Two-Phase Mixture in a Vessel

2001 ◽  
Author(s):  
Moon-Hyun Chun ◽  
Kyong-Won Seo ◽  
Hyeng-Kuk Kim
Keyword(s):  
Experimental Study ◽  
Water Level ◽  
Air Flow ◽  
Water Levels ◽  
Working Fluid ◽  
Entrainment Rate ◽  
Two Phase ◽  
Initial Water ◽  
Liquid Entrainment ◽  
Phase Mixture

Abstract An experimental study of liquid entrainment by rapid surface swelling of a two-phase mixture in a vessel has been performed. To investigate the effects of air flow rate and initial water level on the liquid entrainment, a series of experiments have been performed using air and water as working fluid. A total of 64 experimental liquid entrainment rate data have been obtained for various combinations of the test parameters (i.e., for six different initial water levels and various air flow rates) using two test vessels that have the same height but different inner diameters (0.15 and 0.3m, respectively) for vertical bubbly and churn-turbulent flow conditions. An empirical correlation for the liquid entrainment rate, E has been developed in terms of the superficial velocity of air, the initial water level, the density of gas, the surface tension, and the gravity. This correlation shows a good agreement with the present experimental data within ±30% over a wide range of flow parameters.

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