Optimal Design Parameters of Stationary Heat Exchanger by Using Taguchi Method

• Main Authors: Chih-Ching Li, 利志經
• Other Authors: Cheng-Hsing Hsu
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/xk9tfy

碩士 === 中原大學 === 機械工程研究所 === 103 === The goal of this research is finding out the optimal geometry parameters of stationary heat exchanger. Considering energy saving and reducing the loading of air conditioning, the cryogenic energy is recycled from the indoor air to cool down the intake fresh air. The air temperature of hot-side exit can be reduced by well-designed geometry parameters in order to easily recycle and reuse the cryogenic energy. In this case, the software ANSYS Fluent and Taguchi method are used to simulates and analyze the stationary heat exchanger model to find out the parameters of reducing the temperature of hot jet, and discussions are made for the few factors which have influents with the temperature of jet. In the beginning of optimization factors are shape of channel, pitch of channel, material of entrance and inlet velocity. Second times, the factors are the angle of triangle channel, channel length and upward or downward configurations of channel. At the first time optimization, the factors of inlet velocity and shape of channel are the most influential contribution and we obtain an optimal factor combination is A1-B3-C2-D1, and get the minimum average temperature of hot jet is 46.16℃. Second times of optimization, the factors of channel length and the angle of triangle channel are the most influential contribution and we obtain an optimal factor combination is A1-B2-C2, and get the minimum average temperature of hot jet is 43.52℃. Combining these two times simulations and comparing with original design, the temperature reduction is 4.96℃.