Air-Flow Distribution Simulation and Experimental Analysis of a New Testing Room for Refrigerated Display Cabinet

2012 ◽  
Vol 614-615 ◽  
pp. 701-706
Author(s):  
Chao Huang ◽  
Fang Wang ◽  
Zhi Min Wu ◽  
Chao Guo
Keyword(s):  
Cfd Simulation ◽  
Design Method ◽  
Air Flow ◽  
Flow Distribution ◽  
Simulation Software ◽  
Air Distribution ◽  
Distribution Analysis ◽  
Experiment System ◽  
Quality Regulation ◽  
Testing Room

Based on European Standard EN441-2, an experiment system for measuring the thermal properties of refrigerated display cabinet is designed and constructed. Considering the practice requirements from user, the air distribution analysis is doing under various air-flow form in the testing room. This paper uses the FLUENT, which is one of the CFD simulation software, to verify the design method of air movement. Finally a series of tests required for laboratory quality regulation have been done and the data of velocity or temperature is under the new requirement.

Kitchen and Toilet of the Residence Exhaust Flow Field Analysis

2011 ◽  
Vol 354-355 ◽  
pp. 726-731
Author(s):  
Yue Ren Wang ◽  
Cong Xue ◽  
Jing Zhang
Keyword(s):  
Indoor Air ◽  
Cfd Simulation ◽  
Simulation Software ◽  
Field Analysis ◽  
Air Distribution ◽  
Volume Changes ◽  
Air Volume ◽  
Secondary Pollution ◽  
Comparison Results ◽  
Flow Field Analysis

Adopting the k-ε standard model, the CFD simulation software to simulate the indoor kitchen and toilet different row of indoor air volume air distribution in natural ventilated circumstance, by comparison results show that different row of indoor air volume changes in the rate of secondary pollution rate, and then to provide the change rule of indoor air quality protection reference basis.

scholarly journals Numerical Simulation of the Performance Characteristics of the Hybrid Closed Circuit Cooling Tower

2008 ◽  
Vol 13 (1) ◽  
pp. 89-101 ◽  
Author(s):  
M. M. A. Sarker ◽  
E. Kim ◽  
G. C. Moon ◽  
J. I. Yoon
Keyword(s):  
Pressure Drop ◽  
Experimental Measurement ◽  
Cooling Tower ◽  
Cfd Simulation ◽  
Air Flow ◽  
Flow Distribution ◽  
Cooling Capacity ◽  
Performance Characteristics ◽  
Closed Circuit ◽  
Flow Rates

The performance characteristics of the Hybrid Closed Circuit Cooling Tower (HCCCT) have been investigated applying computational fluid dynamics (CFD). Widely reported CFD techniques are applied to simulate the air-water two phase flow inside the HCCCT. The pressure drop and the cooling capacity were investigated from several perspectives. Three different transverse pitches were tested and found that a pitch of 45 mm had lower pressure drop. The CFD simulation indicated that when air is supplied from the side wall of the HCCCT, the pressure drop can be over predicted and the cooling capacity can be under predicted mainly due to the non-uniform air flow distribution across the coil bank. The cooling capacity in wet mode have been calculated with respect to wet-bulb temperature (WBT) and cooling water to air mass flow rates for different spray water volume flow rates and the results were compared to the experimental measurement and found to conform well for the air supply from the bottom end. The differences of the cooling capacity and pressure drop in between the CFD simulation and experimental measurement in hybrid mode were less than 5 % and 7 % respectively for the uniform air flow distribution.

scholarly journals A Simulation Study of Drying Chamber for Marine Product

2021 ◽  
Vol 13 (6) ◽  
Author(s):  
Mohd Afzanizam Mohd Rosli ◽  
◽  
Hiew Sit Jing ◽  
Nur Izzati Mohd Azhar ◽  
Maidi Saputra ◽  
...  
Keyword(s):  
Steady State ◽  
Cfd Simulation ◽  
Air Flow ◽  
Flow Distribution ◽  
Cfd Simulations ◽  
High Quality ◽  
Steady State Condition ◽  
Temperature Distributions ◽  
Marine Product ◽  
Drying Chamber

Drying chamber is a drying application for agriculture product to produce high quality and hygiene product. The purpose of this paper is to propose best configuration trays arrangement in drying chamber for better distribution of velocity and temperature. Therefore, five configurations of trays are analyzed to obtain the best performance of uniformity air flow distribution within drying chamber. CFD simulation studied the uniform air flow in the drying chamber in steady state condition. A validation is performed by comparing the data obtained from the literature review CFD simulation to ensure the methodology is correct. Then, the drying chamber with different trays arrangements are simulated using CFD simulations to obtain velocity and temperature distributions at nine plotted points on trays. From the results obtained, it concluded that design (A) and (D) are selected as the best designs for uniformity because there is less discrepancy for each point contributed the more uniformity of distribution.

Effects of vortexes in feed header on air flow distribution of PEMFC stack: CFD simulation and optimization for better uniformity

2021 ◽  
Vol 173 ◽  
pp. 498-506
Author(s):  
Guoqing Su ◽  
Daijun Yang ◽  
Qiangfeng Xiao ◽  
Haiqin Dai ◽  
Cunman Zhang
Keyword(s):  
Cfd Simulation ◽  
Air Flow ◽  
Flow Distribution ◽  
Simulation And Optimization

CFD Simulation of Air Temperature inside a Bus Passenger Compartment

2015 ◽  
Vol 735 ◽  
pp. 85-90
Author(s):  
Noor Emilia Ahmad Shafie ◽  
Haslinda Mohamed Kamar ◽  
Nazri Kamsah
Keyword(s):  
Air Temperature ◽  
Cfd Simulation ◽  
Air Flow ◽  
Flow Distribution ◽  
Passenger Compartment ◽  
Air Velocity ◽  
Airflow Velocity ◽  
Respiratory Allergies ◽  
Temperature Boundary ◽  
Fluent Software

Good ventilation is important for passenger for sufficient supply of fresh air during commuting in a bus. Insufficient fresh air causes feeling of uncomfortable to passenger and affects passenger’s health. Airborne transmission disease, headache and respiratory allergies are the usual health symptoms. This paper presents the CFD study of air flow inside a bus passenger compartment. The objective is to estimate the temperature level at the diffuser, seat and floor locations of the bus passenger compartment. Two conditions of airflow velocity at the supply diffuser were examined, namely 2.7 m/s and 3.1 m/s. A CFD Fluent software was employed to develop and meshed a simplified 3D model of a quarter section of a bus passenger compartment. Air velocity and temperature boundary conditions were prescribed on the model based on the actual data obtained from field measurement. Turbulent flow analyses were carried out using standard k-ε model to visualize the air flow distribution inside the compartment. The results show that the velocity distribution is uniform when the diffuser air velocity is 3.1 m/s. When the diffuser air velocity is 3.1 m/s the air temperature of the seat area was decreased by 0.3°C. The air temperature inside the cabin can be maintained uniform at 23°C when diffuser air velocity was fixed at 3.1 m/s.

Acoustic Mask for Air Flow Distribution Analysis in Speech Therapy

2016 ◽  
pp. 377-387 ◽  
Author(s):  
Michał Kręcichwost ◽  
Zuzanna Miodońska ◽  
Joanna Trzaskalik ◽  
Julia Pyttel ◽  
Dominik Spinczyk
Keyword(s):  
Speech Therapy ◽  
Air Flow ◽  
Flow Distribution ◽  
Distribution Analysis

Numerical Simulation on Air Flow Field of Tangential Longitudinal Axial Combine Harvester

2014 ◽  
Vol 971-973 ◽  
pp. 605-608
Author(s):  
Yao Ming Li ◽  
Fang Li
Keyword(s):  
Flow Field ◽  
Cfd Simulation ◽  
Air Flow ◽  
Simulation Software ◽  
Navier Stokes ◽  
Navier Stokes Equation ◽  
High Loss ◽  
Cleaning Device ◽  
Combine Harvester ◽  
Continuous Equation

Withthe use and popularization of the tangential longitudinal axial combineharvester,the cleaning device of high loss rate and impurity rate continuouslyemerging.In order to analyses the reason of cleaning performance is low,thestudy for airflow field distribution of thetangential-longitudinal axial combine harvester has been carried out.Based onhomogenization when Reynold continuous equation and navier-stokes equation andthe renormalization group (RNG) kappa epsilon turbulence model predominateconstitute a closed equations,Using CFD simulation software simulated thecleaning shoe airway airflow.The simulation results show that the cleaning shoeair distribution is symmetrical in the screen surface width direction.Along thescreen surface height direction airflow velocity decreases gradually,Along thescreen length direction ,at the front of the sieve air velocity is low,Near themiddle of the screen as to achieve the maximum of air velocity.And for cleaningshoe air flow field were measured experiment, verify the accuracy of flow fieldsimulation.

Cold Aisle Air Distribution in a Raised Floor Data Center With Heterogeneous Opposing Orientation Racks

2011 ◽  
Author(s):  
Pramod Kumar ◽  
Yogendra Joshi ◽  
Michael K. Patterson ◽  
Robin Steinbrecher ◽  
Marissa Mena
Keyword(s):  
Data Center ◽  
Air Flow ◽  
Flow Distribution ◽  
Work Load ◽  
High Heat ◽  
Heterogeneous Data ◽  
Air Distribution ◽  
Fan Speed ◽  
Tile Flow ◽  
Flow Map

In this paper we experimentally investigate the air flow distribution at the inlets of two opposing racks in a cold aisle. The racks have non uniform heat load and air flow requirements creating a heterogeneous data center environment. The Computer Room Air Conditioning (CRAC) unit fan speed is set to meet the air requirement of the high heat density rack. The effect of perforated tile air velocity on air distribution to both the racks is studied using particle image velocimetry (PIV) technique. PIV images are recorded at various rack heights corresponding to the locations of the servers in the rack. The PIV images recorded at various locations are stitched to construct a complete rack inlet air flow map. Three cases of rack air flow distributions are studied by varying the server work load and perforated tile flow rate. A significant change in the air distribution pattern is observed for the three cases investigated.

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