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Three-Dimensional Numerical Analysis of Ventilation Efficiency of the Indoor Air Flow

Author: YangYuRong
Tutor: LongTianYu
School: Chongqing University
Course: Heating,Gas Supply, Ventilation and Air Conditioning Engineering
Keywords: Indoor turbulence Numerical Analysis Ventilation efficiency Optimal Design
CLC: TU834.3
Type: Master's thesis
Year: 2002
Downloads: 236
Quote: 11
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Abstract


Indoor ventilation efficiency , is of great significance for the whole room ventilation or air-conditioning design effect , many studies have shown that it has a direct relationship with the indoor air quality . This article is an attempt on the basis of our predecessors , through the establishment of appropriate mathematical model of fluid flow numerical methods to simulate the concentration of pollutants in the indoor and three-dimensional turbulent of flow distribution , and then analyzes the the calculated indoor ventilation efficiency obtained ventilation efficiency compared the form of a good indoor air . On the basis of the collection of large amounts of data at home and abroad in this area , through the analysis and comparison, with a K- two-equation model to study the indoor air concentration distribution , the establishment of a description of steady-state three-dimensional turbulence indoor air concentration distribution mathematical model, control volume method and the power function distribution scheme to discrete differential equations, coupled by pressure equation semi - implicit method ( SIMPLE ) algorithm, using C language calculation of indoor air flow field and temperature field, concentration field common procedures and preparation , commissioning and operation of the program in Microsoft Visual C 6.0 environment discussion and analysis , and commissioning work to do . Studied typical room with a single stationary sources of indoor ventilation by row on the opposite side to send , send the next row , and sent on the same side of the lower row are several ways to establish the appropriate boundary conditions and mesh , the use of the program prepared them numerical simulation calculation results and then Excel software were displayed and processed to obtain the corresponding conditions of the flow field, concentration field , and then calculate the corresponding ventilation efficiency . From the point of view of the sewage effect on the analysis of several ways better supply and exhaust is sent on the same side of the lower row . From the actual trend of the flow field, concentration field distribution is broadly consistent with the calculation of the ventilation efficiency and have experimental values ??generally consistent , reasonable description of the mathematical model used in this paper , the calculation method is basic and reliable .

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CLC: > Industrial Technology > Building Science > Housing construction equipment > Air-conditioning, heating, ventilation,and its equipment > Ventilation, dust,air purification,dehumidification > Ventilation technology
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