Numerical simulation of airflow distribution in air-conditioned room of office building based on ANSYS

2015 ◽  
pp. 515-518 ◽  
Author(s):  
R Ma
Keyword(s):  
Numerical Simulation ◽  
Office Building ◽  
Airflow Distribution

Study on the Operation Characteristics of Electrostatic Fabric Precipitator

2012 ◽  
Vol 616-618 ◽  
pp. 2013-2016
Author(s):  
Chao Fan Sun ◽  
Xing Lu Yu ◽  
Xin Feng Long ◽  
Bo Lou ◽  
De Bo Li
Keyword(s):  
Numerical Simulation ◽  
High Performance ◽  
Simulation Method ◽  
Fabric Filter ◽  
Fluid Field ◽  
Airflow Distribution ◽  
Internal Fluid ◽  
Result Show ◽  
Removal Technology ◽  
And Control

Numerical simulation method was used in this paper and 3-D structure of model was established with Pro/Engineering. It is evident that the efficiency of electric-bag is related to internal fluid field. The internal fluid field characteristics (pressure field, velocity field, turbulence field and particle tracks) are obtained by the numerical simulation soft called Fluent, the result show that airflow distribution could be improved obviously by the flow deflectors in electrostatic precipitation area. And the distribution of DPM in filter area is non uniform, which would lead to various damage on bags and affect the operation of electrostatic fabric filter. All these work have important significance for the study of new dust removal technology, developments of high performance precipitator, reduction of dust pollution and control of air pollution as well.

Effect of Plenum Chamber Configuration on Airflow Uniformity in Unidirectional Flow Cleanrooms

1994 ◽  
Vol 37 (4) ◽  
pp. 21-27
Author(s):  
Guoping Xie ◽  
Yoshihide Suwa
Keyword(s):  
Numerical Simulation ◽  
Numerical Method ◽  
Pressure Loss ◽  
Simulation Method ◽  
Calculation Domain ◽  
Plenum Chamber ◽  
Unidirectional Flow ◽  
Numerical Simulation Method ◽  
Airflow Distribution ◽  
Simulation Results

Uniformity of airflow distribution in a unidirectional flow cleanroom has been studied experimentally and numerically. The influence of the height of the plenum chamber and the velocity of airflow introduced into the chamber on the airflow uniformity are investigated experimentally. In addition, a numerical simulation method to predict airflow uniformity is proposed, taking into account the characteristics of the pressure loss of the filter. The calculation domain in this study includes not only the cleanroom but also the plenum chamber and the exhaust chamber. The validity of the numerical method is also verified by comparing the simulation results with the experiments. Finally, the numerical method is used to obtain an appropriate height for the plenum chamber.

Airflow Distribution and Microenvironment Evaluation of MP Task Conditioning System

2007 ◽  
Author(s):  
Guozhong Zheng ◽  
Youyin Jing ◽  
Hongxia Huang ◽  
Lijun Shi
Keyword(s):  
Numerical Simulation ◽  
Velocity Distribution ◽  
Distribution Systems ◽  
Air Distribution ◽  
Hvac System ◽  
Breathing Zone ◽  
Airflow Distribution ◽  
Air Blowing ◽  
Clean Air ◽  
Supply Velocity

During recent years an increasing amount of attention has been paid to air distribution systems with which officer can individually condition the immediate environment of their workstations. Fanger suggested supplying ventilation air that is unmixed with room air, directly to the breathing zone of each occupant. Task conditioning aims to provide each occupant with personalized clean air direct to the breathing zone. Each occupant can control the environment at his/her workplace. Microenvironment of a typical office workplace consisting of movable panel (MP) task conditioning systems was studied by numerical simulation. MP task conditioning systems were operated while a conventional HVAC system supplied air through a diffuser located in the ceiling. Air was exhausted through a ducted ceiling-level grill. Numerical simulation of 3-D turbulent flow (k-ε closure) was separately conducted to study the influence of supply velocity, air blowing distance and size of MP supply outlet on microenvironment. Three task conditioning velocities, 0.6, 0.8 and 1.0m/s, three sizes 0.3×0.15, 0.3×0.1 and 0.25×0.08m and two air blowing distances were studied. In addition to analyzing temperature and velocity distribution, Draught Rating (DR) and Predicted Percentage of Dissatisfied (PPD) of the room and workstation were studied.

Numerical Simulation of Airflow in Wet Rotating Reticular Plate Electrostatic Precipitator

2011 ◽  
Vol 361-363 ◽  
pp. 619-622
Author(s):  
Ming Hua Bai ◽  
Zhi Qiang Liu ◽  
Zhi Min Zhang ◽  
Jing Jing Liu
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Empirical Equation ◽  
Electrostatic Precipitator ◽  
Internal Flow ◽  
Resistance Factors ◽  
Airflow Distribution ◽  
Jump Model

Wet rotating reticular plate electrostatic precipitator gathers the advantages of moving electrode type electrostatic precipitator technology and wet electrostatic precipitator technology, and utilizes reticular plate, which significantly increases the dust collecting area. In this paper, airflow distribution boards were simplified as porous jump model, and empirical equation was used to get the inertial resistance factors of airflow distribution boards. FLUENT was used to simulate the internal flow field under the condition of without guide plates and with guide plates. Regular skewed airflow was formed through introducing guide plates, which improved the internal flow field significantly.

scholarly journals CFD NUMERICAL SIMULATION OF TEMPERATURE AND AIRFLOW DISTRIBUTION IN PIGSTY BASED ON GRID INDEPENDENCE VERIFICATION

2020 ◽  
Vol 61 (2) ◽  
pp. 241-250 ◽  
Author(s):  
Min Jin ◽  
Chunguang Wang ◽  
Pengpeng Wang
Keyword(s):  
Numerical Simulation ◽  
Relative Error ◽  
Mesh Generation ◽  
Average Relative Error ◽  
Airflow Velocity ◽  
The Third ◽  
Airflow Distribution ◽  
Cfd Numerical Simulation ◽  
Grid Independence

Grid independence verification was implemented to improve the reliability of CFD numerical simulation in pigsty. The effects of four different grid numbers on airflow and temperature simulation of 0.4m, 1.0m and 1.6m heights were compared. The results showed that the third method of mesh generation and the grid numbers about 2.09 million were more suitable for this pigsty model. The average relative error of airflow velocity and temperature between the simulated and the measured alues were 7.1% and 3.8% respectively, the average NMSE were 0.0012 and 0.0066 respectively. Therefore, grid independence verification is of great significance for CFD numerical simulation.

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