- 學位論文
車輛艙溫分析與抑制研究
The Temperature Analysis and The Suppression Studies of Vehicles Cabin
摘要
本研究主要是針對陽光照射下汽車之車艙溫度變化情形分析探討，車輛停車靜止受陽光照射時，車艙溫度急速上升，針對曝曬下之艙溫研究，以冷氣降溫方法居多；在靜態下降溫方法，其系統製造成本昂貴、構造複雜，不符合經濟效應。 本論文利用熱力學理論進行研究，分析車艙在自然通風與密閉狀態下之溫度變化。並在烈日下製造車艙對流現象及啟動空調之除熱變化。在實車量測過程中發現車窗關閉時，受太陽輻射及溫室效應影響車艙溫度升高達63℃；而擋風玻璃下之儀表板其溫度更高達77℃；降溫實驗則利用車輛空調之通風系統為氣流入口，並由後飾板處以低功率抽風馬達將熱氣排出，製造車艙熱對流現象及降低車艙溫室效應。實驗結果顯示當風速越快，車艙內溫度下降比例也越快，其最佳之風速為6m/s∼8m/s ，故當車艙內有對流現象時，在陽光最強時段車艙之最高溫度尚能降低約12℃，而維持在50℃左右之穩定狀態。經由數據驗證交叉比對後，發現確有其可行性。
並列摘要
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.