Dynamic Simulation of FCCU under Abnormal Condition

2015 ◽  
Vol 713-715 ◽  
pp. 235-238
Author(s):  
Wen De Tian ◽  
Shan Jun Mu ◽  
Man Man Jin ◽  
Chun Li Wang ◽  
Chuan Kun Li
Keyword(s):  
Mathematical Model ◽  
Reaction Kinetics ◽  
Oxygen Content ◽  
Dynamic Simulation ◽  
Simulation System ◽  
Lumped Model ◽  
Dynamic Mathematical Model ◽  
Abnormal Condition

The dynamic mathematical model of FCCU reactor was established. Reaction kinetics uses five parameter lumped model, with components emulated by similar hydrocarbons. Simulation system was built to simulate normal conditions, and the effect of some abnormal conditions on charred tank’s exit oxygen content, charred tank’s temperature (not cooled), charred tank’s temperature (cooled) were studied. Because the abnormal condition is the combustion of regenerator’s dilute phase’s extremity, this paper used the amount of carbon monoxide’s combustion to simulate this abnormal condition.With the variation of the charred tank’s exported oxygen content or temperature reflects the degree of dilute phase’s combustion. The results show that the dynamic simulation of the system can accurately simulate the cracking reactor abnormal condition.

Transient Performance Simulation of Single-Cylinder Engines Based on Tribology Behaviors

2010 ◽  
Vol 34-35 ◽  
pp. 946-950
Author(s):  
Jian Zhao ◽  
Bin Tang ◽  
Yun Bang Tang ◽  
Kun Peng Qi ◽  
Er Lin Ma
Keyword(s):  
Mathematical Model ◽  
Dynamic Simulation ◽  
Major Effect ◽  
Simulation System ◽  
Transient Performance ◽  
Performance Simulation ◽  
Single Cylinder ◽  
Motion Characteristics ◽  
Major Factors ◽  
Piston Assembly

The transient performance of engines is investigated in this paper. A mathematical model of single-cylinder engines is established and the friction torques produced by crankshaft bearing, piston assembly, pumping loss and other major factors are modeled. A dynamic simulation system is developed based on the MATLAB Simulink environment. Friction torques and instantaneous motion characteristics of the engine are predicted. The results show that crankshaft bearing, piston assembly, and pumping loss have a major effect on the transient performance of the engine, and the models described in this paper provide an effective tool to simulate engine processes.

Dynamic simulation and performance investigation of no-frost refrigerator: Part I mathematical model

2009 ◽  
Vol 14 (1) ◽  
pp. 40-44
Author(s):  
Xiu-ping Su ◽  
Jiang-ping Chen ◽  
Zhi-jiu Chen ◽  
Xiao-tian Zhou
Keyword(s):  
Mathematical Model ◽  
Dynamic Simulation ◽  
And Performance

Design of Synchronous Machine Model Based on PRO/E and Dynamic Simulation

2012 ◽  
Vol 246-247 ◽  
pp. 1220-1225
Author(s):  
You Kun Zhong
Keyword(s):  
Mathematical Model ◽  
Dynamic Simulation ◽  
Three Dimensional ◽  
Transmission System ◽  
Synchronous Machine ◽  
Dimensional Model ◽  
Transmission Performance ◽  
Three Dimensional Model ◽  
Machine Model ◽  
Working Principle

With the increasing of the number of cars, people are also getting higher and higher demands on the performance of the car, and especially pay attention to the improvement and optimization of automobile transmission system. The transmission is a key part of automobile transmission system, and transmission performance and stability depend on the synchronous machine, so in order to make the vehicle transmission system with higher efficiency, it is necessary to study the synchronous machine. On the basis of elaborating synchronous machine working principle, the use of dynamics theory to establish mathematical model of synchronous machine system, and to carry out the simulation of synchronous machine three-dimensional model in PRO/E environment, then the use of virtual prototype technology to optimize the parameters of synchronous machine, thereby improving the performance of synchronous machine.

Constant Speed Motion Simulation and Error Analysis of Planar Non-Circular Curve Parts

2012 ◽  
Vol 220-223 ◽  
pp. 1559-1563
Author(s):  
Rui Wu ◽  
Li Bao ◽  
Yuan Kui Xu
Keyword(s):  
Mathematical Model ◽  
Error Analysis ◽  
Relative Error ◽  
Plane Curve ◽  
Simulation System ◽  
Constant Speed ◽  
Motion Simulation ◽  
Production Practice ◽  
The Mathematical Model ◽  
Circular Curve

The relative direction for a constant speed can be determined according to the planar non-circular curve parts. To establish the mathematical model, a constant speed motion simulation system is designed. The parameters of (vH=5mm/s, δ<3") is commonly used for the simulation system to simulate the movement of drawing the error curve. The results show that by controlling the movement of the plane curve parts in mathematical model can derive the basic constant speed, the relative error of constant speed is less than 3%, it provides a reliable bias when apply to production practice.

Dynamic Simulation System of Air Source Heat Pump System Based on Building Hourly Load

2013 ◽  
Vol 13 (9) ◽  
pp. 1406-1414
Author(s):  
Wang He ◽  
Liu Yong-Shun ◽  
Liu Xiao-Li ◽  
Duan Jin-Hui ◽  
Xue Song ◽  
...  
Keyword(s):  
Dynamic Simulation ◽  
Heat Pump ◽  
Simulation System ◽  
Pump System ◽  
Heat Pump System ◽  
Air Source Heat Pump

scholarly journals DYNAMIC SIMULATION AND COMPOSITION CONTROL IN A 10 L MIXING TANK

REAKTOR ◽  
2012 ◽  
Vol 14 (2) ◽  
pp. 95
Author(s):  
Yulius Deddy Hermawan ◽  
Gogot Haryono
Keyword(s):  
Mathematical Model ◽  
Dynamic Simulation ◽  
Closed Loop ◽  
Step Function ◽  
Open Loop ◽  
Liquid Volume ◽  
Control Parameters ◽  
Software Environment ◽  
Composition Control ◽  
Volumetric Rate

The open loop experiment of composition dynamic in a 10 L mixing tank has been successfully done inlaboratory. A 10 L tank was designed for mixing of water (as a stream-1) and salt solution (as astream-2 with salt concentration, c2 constant). An electric stirrer was employed to obtain uniformcomposition in tank. In order to keep the liquid volume constant, the system was designed overflow. Inthis work, 2 composition control configurations have been proposed; they are Alternative-1 andAlternative-2. For Alternative-1, the volumetric-rate of stream-1 was chosen as a manipulatedvariable, while the volumetric-rate of stream-2 was chosen as a manipulated variable for Alternative-2. The composition control parameters for both alternatives have been tuned experimentally. Thevolumetric-rate of manipulated variable was changed based on step function. The outlet stream’scomposition response (c3) to a change in the input volumetric-rate has been investigated. Thisexperiment gave Proportional Integral Derivative (PID) control parameters. The gain controllers Kc[cm6/(gr.sec)] for Alternative-1 and Alternative-2 are -34200 and 40459 respectively. Integral timeconstant ( tI) and Derivative time constant (tD) for both alternatives are the same, i.e. tI = 16 second,and tD = 4 second. Furthermore, closed loop dynamic simulation using computer programming wasalso done to evaluate the resulted tuning parameters. The developed mathematical model ofcomposition control system in a mixing tank was solved numerically. Such mathematical model wasrigorously examined in Scilab software environment. The results showed that closed loop responses inPID control were faster than those in P and PI controls.

A Mathematical Model for Dynamic Simulation of HVDC Systems

1983 ◽  
Vol PER-3 (6) ◽  
pp. 50-51
Author(s):  
N. Vovos ◽  
G. Galanos ◽  
G. Giannakopoulos
Keyword(s):  
Mathematical Model ◽  
Dynamic Simulation
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