The Analyses for Three Dimensional Thermal Flow Field in the Environment Control Room

• Main Authors: Liu, Chien-Po, 劉建伯
• Other Authors: Chu, Hsin-Sen
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/91399558875813531341

碩士 === 國立交通大學 === 機械工程研究所 === 85 === 　　The environment control room is used for measuring the performance and efficiency of air conditioners in the refrigeration system. The three-dimensional distributed outline of airflow in velocity and temperature fields in the indoor-side room is studied numerically by the computer program FLOW3D. 　　This airflow field is assumed as incompressible, steady, non-isothermal the turbulent. The k-ε turbulence model, SIMPLE algorithm as well as hybrid scheme are utilized to solve these problems. The effect of inlet locations on flowfield with two different high temperature of ceiling and floor and fixed outlet are discussed in this analysis. Under environment control standard, a optimal design is developed by changing the numbers, the locations and the values of heat sources. 　　The results show that the nearer inlet location is to corners, the more uniform velocity as well as temperature distributions will become. However, airflow kinetic energy will decay seriously due to the influence of friction. As for environment control room, the capability of diffusion on heat sources should be decided by thermal convection effect. When this effect arised, diffusion happenned. If airflow velocity is slow, its local temperature would become high.