隨著經濟發展需要,都市民眾交通需求趨向講究安全、快速、平穩,再加上全球環保意識日顯重要,政府對節能省碳之推廣,不遺餘力,大眾運輸系統之重要性日益顯現。捷運電聯車車廂環境舒適與否,對乘車旅客有顯著影響,尤其通勤旅客更是明顯感受。本研究目標能讓乘車旅客在搭車過程中享有舒適體感,且能提高電聯車空調系統省電效率。 本研究採用CFD軟體,模擬捷運電聯車車廂內空調系統,溫度動能的變化情形。經過多次嘗試,模擬結果如下:調高空調風速設定值,可以使車廂內部溫度下降的時間縮短,效率較好;而且不用調降溫度設定值,相對比較省電,亦可有效縮短空氣擴散時間。在同一風速下,溫度設定越低,較低溫的溫度流場面積會縮小,溫度流場的等溫線會越密集。 車廂內空調溫度直接影響乘車旅客舒適感。由模擬實驗的結果得知,加大風速,可加快降低溫度的時間,擴散較為良好,不用調低溫度設定,相較省電。
With the development in economy, urban public transportation tends to pay attention to be safer, faster, more stable, coupled with the increasing importance in global environmental awareness; EMU car is comfortable or not will have a significant impact on passengers’ travel, especially on commuters’. The objective of this study is not only make the process of car passengers enjoy a comfortable ride journey, but also improving the EMU energy efficiency of air conditioning systems. This study uses CFD software to simulate the EMU car’s air conditioning system, the temperature variations of kinetic energy. The simulation results show that the lower temperature location is near air conditioning outflow system. The higher temperature is on both sides of the EMU. At the same wind speed, when the temperature profile is setting lower, the contours of the flow field is more intensive. The simulation results show that increasing the wind speed can reduce the temperature and speed up the time to let it more efficiency, not decreasing the temperature setting.