Safety aspects during transient and steady-state operation of a pilot-scale distillation column

2000 ◽  
Vol 19 (3) ◽  
pp. 179-188
Author(s):  
Douglas E. Stark ◽  
David R. Shonnard ◽  
Daniel A. Crowl
Keyword(s):  
Steady State ◽  
Distillation Column ◽  
Pilot Scale ◽  
Safety Aspects ◽  
Steady State Operation ◽  
Transient And Steady State

Performance evaluation of SBR treatment for nitrogen removal from tannery wastewater

2006 ◽  
Vol 53 (12) ◽  
pp. 275-284 ◽  
Author(s):  
S. Murat ◽  
G. Insel ◽  
N. Artan ◽  
D. Orhon
Keyword(s):  
Steady State ◽  
Nitrogen Removal ◽  
System Performance ◽  
Model Simulation ◽  
Pilot Scale ◽  
Simulation System ◽  
Nitrogen Compounds ◽  
Concentration Profiles ◽  
Steady State Operation ◽  
Wide Range

Performance of SBR treatment for nitrogen removal from tannery is evaluated for a wide range of wastewater temperature between 7 and 30 °C. A pilot-scale SBR unit fed with plain-settled wastewater is operated on site for this purpose. Effective nitrogen removal is sustained by adjustment of the sludge age from 28 to 5 days. Concentration profiles of nitrogen compounds within a selected complete SBR cycle during the steady state operation at different wastewater temperatures and sludge ages are evaluated by model simulation. System performance is also interpreted in terms of modeling and stoichiometric calculation. Additional nitrate loss was observed during aerobic period when the aeration intensity was reduced by the factor of 50%.

Transient Lubricating Films With Inertia—Turbulent Flow

1984 ◽  
Vol 106 (1) ◽  
pp. 134-139 ◽  
Author(s):  
H. G. Elrod ◽  
I. Anwar ◽  
R. Colsher
Keyword(s):  
Steady State ◽  
Turbulent Flow ◽  
Stream Function ◽  
Velocity Gradient ◽  
Eddy Viscosity ◽  
Mean Velocity ◽  
Steady State Operation ◽  
Pressure Development ◽  
Transient And Steady State

This paper presents some new equations for the treatment of turbulent lubricating films when the effects of inertia cannot be neglected. The eddy-viscosity concept is used to represent the turbulent stresses in terms of mean-velocity gradient. Transient and steady-state operation are both considered by means of a generalized stream-function-pressure development.

scholarly journals Transient and Steady-State Analysis of Single Switched Capacitor Converter

2018 ◽  
Vol 14 (1) ◽  
pp. 38-45
Author(s):  
Alexander Kushnerov
Keyword(s):  
Steady State ◽  
Switched Capacitor ◽  
Equivalent Resistance ◽  
Accurate Calculation ◽  
First Order ◽  
Voltage Ripple ◽  
Steady State Operation ◽  
Switched Capacitor Converter ◽  
Analytical Expressions ◽  
Transient And Steady State

The paper derives closed form expressions for transient and steady-state operation of a DC-DC converter with single switched capacitor. To this end, the result of each switching is considered as a point in the iterative process, and the function between the points is reconstructed. As opposed to the commonly accepted approach, when each of the topologies is approximated by a first order circuit, the proposed analysis is carried out for second order circuits. This allows obtaining the waveform of output voltage ripple and paves the way to more accurate calculation of equivalent resistance. The obtained analytical expressions were verified by simulations and an excellent agreement between the results was found.  

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