| Summary: | 碩士 === 國立虎尾科技大學 === 機械與機電工程研究所 === 98 === This research is mainly aims in the vehicles cabin the hot flow field to analyze the discussion; When the vehicles under the sun, then the vehicles cabin''s space is heated up in the solar radiation, Under the cabin temperature for exposure studies, mostly air-conditioned cooling method; cooling method in the static state, the system manufacturing cost of expensive and complex and do not meet the economic effects.
Thermodynamic theory of this thesis research, analysis of natural ventilation and closed windows in the state of the vehicle cabin temperature. It generates thermal convection and thermal changes in the operation of air conditioning in the vehicle compartment when solar radiation. The process of measurement found in the windows closed, the solar radiation and greenhouse effect the vehicle cabin temperature reached 63℃;the instrument board temperature as high as 77℃ under the windshield. The cooling down experiment, the use of air-conditioning ventilation system is air entry, and then use low-power motor out hot air from the back plates, creating the phenomenon of thermal convection and to reduce the greenhouse effect in the cabin. The results showed that when Air blower increased, the temperature dropped too quickly in the vehicle cabin,The best air speed is 6m/s～8m/s. Therefore, when the maximum solar radiation, there are convection reduces the maximum temperature of about 12 ℃, while temperature is maintained at about 50 ℃ of the steady state in the vehicle cabin.
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