Numerical Simulation of Air Distribution Plate at the Inlet of Wet Electrostatic Precipitator

2014 ◽  
Vol 494-495 ◽  
pp. 756-762 ◽  
Author(s):  
Jin Feng Zhang ◽  
Zai Xing Li ◽  
Wei Li ◽  
Ying Gao ◽  
Qiang Li
Keyword(s):  
Numerical Simulation ◽  
Optimal Allocation ◽  
Electrostatic Precipitator ◽  
Air Distribution ◽  
Dust Collector ◽  
Key Factors ◽  
Airflow Distribution ◽  
Distribution Uniformity ◽  
Design Requirements ◽  
Distribution Plate

The air distribution uniformity of electrostatic precipitator is one of the key factors to affect the efficiency of dust collector. A layer of air distribution plate was set in precipitator and its opening rate of distribution plate was adjusted to explore the optimal allocation of air distribution in the precipitator. With the design requirements, we used the Fluent to simulate the airflow distribution in the precipitator. The results show that it can obtain more uniform air distribution to adjust the hole shape and the opening rate of air distribution plate, and the efficiency is ideal when the opening rate is 30%.

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.

Study on the Sand/Dust Inject Approach in Sand/Dust Test System

2014 ◽  
Vol 543-547 ◽  
pp. 400-404
Author(s):  
Hong Wei Li ◽  
Hong Yan Li ◽  
Ying Dong ◽  
Hai Bo Han ◽  
Li Niu
Keyword(s):  
Numerical Simulation ◽  
Air Flow ◽  
Test System ◽  
Dust Particles ◽  
Key Factors ◽  
Similar System ◽  
Spray Method ◽  
Numerical Simulation Methods ◽  
Distribution Uniformity ◽  
Sand Dust

The velocity and concentration of sand/dust particles contained in the air flow are the key factors which affect the quality of sand/dust test. In order to obtain the anticipated sand/dust concentration and uniformity in the test segment, numerical simulation methods are adopted to study the characters of different sand/dust inject approaches. Research results indicated that the gravity sand/dust inject approach is not suitable for the large sand/dust test system, upstream spray approach is appropriate to be adopted in dust test, the uniformity of upstream sand spray method is better than downstream sand spray approach, but its diffusivity is not as good as the latter. In a certain range, the velocity difference between sand/dust spray flow and air flow affects the concentration distribution uniformity slightly. The numerical simulation results applied in the optimal design of particles inject system in some large sand/dust test system get a favorable progress. All results provide reference for the design of similar system and sand/dust environment test.

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.

Simulation of Air Distribution on Inlet Section of Wet-ESP

2013 ◽  
Vol 437 ◽  
pp. 231-235
Author(s):  
Ying Gao ◽  
Juan Wei ◽  
Xing Chun Yang ◽  
Qiang Li
Keyword(s):  
Electrostatic Precipitator ◽  
Porous Plate ◽  
Simple Algorithm ◽  
Element Model ◽  
Dust Particles ◽  
Air Distribution ◽  
Inlet Section ◽  
Two Phase ◽  
Airflow Distribution ◽  
Wet Esp

Based on the theory of two-phase flow, the flow field of dust particles inside the wet electrostatic precipitator with SIMPLE algorithm was modeled used a standard turbulence model and simulated numerically. Establishment of finite element model for the entity porous plate was done with grid refined locally. The number and installation position of porous plates, the diverging angle of the horn inlet and the opening rate of air distribution plates were changed in this simulation. And the studies on the airflow distribution of the inlet section were performed, in which the flow of key parameters for air flow uniform distribution are given. The experimental verification of optimal results of simulation model suggested that the simulation results and the experimental results were coincident.

Numerical simulation and application of entrainment dust collector for fully mechanized mining support based on orthogonal test method

2021 ◽  
Vol 380 ◽  
pp. 553-566
Author(s):  
Wenjing Yin ◽  
Gang Zhou ◽  
Dong Liu ◽  
Qunzhi Meng ◽  
Qian Zhang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Orthogonal Test ◽  
Test Method ◽  
Dust Collector ◽  
Orthogonal Test Method

scholarly journals Numerical study of the air distribution in the Crew Quarters on board of the International Space Station

2019 ◽  
Vol 85 ◽  
pp. 02015 ◽  
Author(s):  
Charles Berville ◽  
Matei-Răzvan Georgescu ◽  
Ilinca Năstase
Keyword(s):  
Numerical Simulations ◽  
International Space Station ◽  
Numerical Study ◽  
Ventilation System ◽  
Space Station ◽  
Air Distribution ◽  
Thermal Manikin ◽  
Airflow Rate ◽  
International Space ◽  
Airflow Distribution

The current concept of Crew Quarters on board of the International Space Station has several issues according to the crew member’s feedback. Major issues concern noise levels, the accumulation of CO2 and the quality of the air distribution. Our study targets the airflow distribution, to diagnose this issue, we realise a series of numerical simulations (CFD) based on a real scale replica of the Crew Quarters. Simulations were set with a zero-gravity mode and with the theoretical air parameters inside the SSI. The geometry includes a thermal manikin having the neutral posture of a body in the absence of gravity. Numerical simulations were run for the three different air flow rates provided by the current ventilation system. Results have shown that the air distribution inside the Crew Quarter is insufficient for low airflow rates but becomes acceptable for the higher airflow rate, however the higher airflow rate can potentially produce draught discomfort.

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