Notice of Retraction: A CFD simulation of cold air distribution system with different supply patterns

This paper briefly introduced the cold air distribution system principle and characteristics. Apply the simulation software to simulate air distribution and thermal environment of cold air supply room. Adopt Effective Draft Temperature (EDT) and Air Diffusion Performance Index (ADPI) to evaluate indoor thermal comfort.

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Numerical Simulation Analysis of Cold Air Distribution System

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.858.278 ◽

2016 ◽

Vol 858 ◽

pp. 278-281

Author(s):

Cheng Cai Sun ◽

Bo Zhou ◽

Jie Lv

Keyword(s):

Numerical Simulation ◽

Physical Model ◽

Distribution System ◽

Simulation Analysis ◽

Three Dimensional ◽

Simulation Method ◽

Air Distribution ◽

Indoor Airflow ◽

Cold Air ◽

Fluent Software

This paper based on an actual project as an example, researching the application of cold air distribution system by using the numerical simulation method. By using Fluent software to establish a three-dimensional physical model, simplificate the physical model, establish proper tuyere model, choose the appropriate turbulence model, select the appropriate boundary conditions. Then simulate indoor airflow organization, get the distribution of temperature field, velocity field in the working area, and evaluate the comfort in the working area. Though the research, this paper provides the appropriate air distribution which is the upper supply air and on opposite side bottom exhaust air. This paper though the numerical simulation concludes that adopts the appropriate air distribution could meet the requirements of indoor thermal comfort.

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Numerical Simulation for Under Floor Air Distribution System With Swirl Diffusers

Heat Transfer, Volume 3 ◽

10.1115/imece2006-13483 ◽

2006 ◽

Author(s):

Xiuling Wang ◽

Darrell W. Pepper

Keyword(s):

Mesh Generation ◽

Distribution System ◽

Cfd Simulation ◽

Las Vegas ◽

Air Distribution ◽

Turbulent Model ◽

Building Technology ◽

Initial Mesh ◽

Thermal Patterns ◽

The University

The Finite Volume RNG k-ε turbulent model was employed to simulate an Under Floor Air Distribution (UFAD) system consisting of 8 swirl diffusers. Initial mesh generation was conducted using Pro/E and GAMBIT. CFD results using FLUENT show both flow and thermal patterns for an actual instrumented laboratory room (Building Technology Laboratory - BTL) located at the University of Nevada Las Vegas. Simulation results for flow and thermal patterns are presented utilizing symmetrical boundary settings for the BTL. Stratification heights and clear zones are discussed. The application of CFD simulation provides insightful analyses in UFAD design and placement.

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Indoor Environment Numerical Simulation of All Cold Air Distribution System With Stratified Air Conditioning

ASME 2008 2nd International Conference on Energy Sustainability, Volume 1 ◽

10.1115/es2008-54112 ◽

2008 ◽

Author(s):

Wei Bing ◽

Li Li ◽

Jiang Lu ◽

Zhang Wei

Keyword(s):

Numerical Simulation ◽

Distribution System ◽

Air Conditioning ◽

Distribution Systems ◽

Dew Point ◽

Air Distribution ◽

Large Space ◽

Cold Air ◽

Point Temperature ◽

Dew Point Temperature

At present all cold air distribution systems are being used widely due to their advantages of smaller ductwork, shorter floor-to-floor height and less energy consumption etc. They are mostly used in VAV (Variable Air Volume) systems or with the radiant panel systems in the office and residential buildings at the supply air dew point temperature of 6∼10°C, rarely used in large space buildings. The technology of stratified air conditioning is one of the energy saving technologies to large space buildings, which has been popularly used in the conventional air supply systems with the supply air dew point temperature of 11∼16°C. In this paper, the cold air distribution system and the stratified air conditioning technology in a large space building are combined to study. With the method of CFD, the indoor thermal environment of a large space workshop is simulated. The velocity and the temperature as well as the relative humidity fields under different air flow modes are presented, analyzed and compared. With the help of numerical simulation results, the optimal airflow mode is proposed, which show that the all cold air distribution with the stratified air conditioning is a good option for large space buildings. All these above will be good references to the application of cold air distribution system and the selection of the airflow mode in large space buildings.

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Numerical Simulation for Under-Floor Air Distribution System With Swirl Diffusers

Journal of Heat Transfer ◽

10.1115/1.2709974 ◽

2006 ◽

Vol 129 (4) ◽

pp. 589-594 ◽

Cited By ~ 6

Author(s):

Xiuling Wang ◽

Darrell W. Pepper

Keyword(s):

Mesh Generation ◽

Distribution System ◽

Cfd Simulation ◽

Las Vegas ◽

Air Distribution ◽

Turbulent Model ◽

Building Technology ◽

Computational Fluid Dynamics Cfd ◽

Thermal Patterns ◽

The University

A finite volume renormalization group (RNG) k-ε turbulent model was employed to simulate an under-floor air distribution (UFAD) system consisting of eight swirl diffusers. Mesh generation was conducted using PRO/E and GAMBIT. Computational fluid dynamics (CFD) results using FLUENT show both flow and thermal patterns for an instrumented laboratory room (Building Technology Laboratory-BTL) located at the University of Nevada Las Vegas. Simulation results are presented using symmetrical boundary settings for the BTL. Stratification heights and clear zones are discussed. The application of CFD simulation provides insightful analyses in UFAD design and placement.

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