輻射效應對作業車廂內熱流場之影響分析研究

The Study of Thermal Flow Pattern in an Operational Vehicle Cabin with Radiation Effect

陳致融(Jhih-Rong Chen)

指導教授 ： 戴昌賢 ； 徐子圭

國立屏東科技大學/工學院/車輛工程系所/碩士(2008年)

https://doi.org/10.6346/NPUST.2008.00270

摘要

作業車廂的運用方向相當廣泛，車廂需應付各種不同特殊狀況，故內部空調不如一般車廂簡易，需特殊配置才便於保存車廂內部人員及物資，本研究目的在於探討不同天候時，太陽輻射及車廂內機台對作業車廂內部熱流場之影響效應加以有系統地分析與量化處理。研究執行在於依據所建立作業車廂之幾何外型與格點模式，以計算流體力學(CFD)方法模擬三維作業車廂流場的輻射熱影響分析，配合理論數值驗證格點準確性，應用CFD商用軟體FLUENT，選用有限體積法SIMPO算則及RNG k-ε紊流模組，結合太陽輻射模式及考慮重力效應，結果模擬出不同時間及天候車廂溫度變化狀態，最佳化出風口配置，空調分別開啟模擬，不同方位車廂溫度變化，使人體最舒適之作業車廂溫度，空調關閉之車廂在空調開啟及門開啟後隨時間車廂內的溫度變化，空調開啟的作業車廂在關閉空調後隨時間車廂內的溫度變化，以提供設計人員作為車廂外部防護材質選擇與內部設備配置之依據。

關鍵字

太陽輻射 ； 空調系統 ； 人體舒適度 ； 計算流體力學

並列摘要

The application of operational vehicle cabin can be found in many areas. It always must be able to operate normally under different climates and special occasions, and the design of air-condition in it is not as easy as that in the car cabin. Special arrangement of air-condition need to protect the people and appliance inside the cabin. The objective of this study is to investigate the effect of solar radiation on the operational vehicle cabin under different climates. The CFD approach was employed to simulate the three-dimensional flow field in the operational vehicle cabin under the influence of solar radiation. The interesting is on the effect of air-condition on the flowfield with the solar radiation using finite volume SIMPLE solver including RNG k-ε turbulence model and solar radiation model. The results show that the effect of temperature variation under different period and weather；dispose in the air outlet of the optimization； the comfortable cabin temperature for human body；the temperature variation with the air-condition turning on and the door opening when the cabin air-condition closed；the temperature variation under air-condition turning off when the air-condition opened; to offer designer to protect the vehicle cabin for the outside material choice and inside basis of device layout.

並列關鍵字

solar radiation ； operational vehicle cabin ； air-condition ； CFD

參考文獻

1. Chow, W. K., and Yu, C. H., 2000,“Simulation on Energy Use for Mechanical Ventilation and Air-conditioning (MVAC) System in Train Compartment”Department of Building Services Engineering, Vol. 25, pp. 1-13.

2. Zmeureanu, R., Iliescu, S., Dauce, D., and Jacob, Y., 2003, “Radiation From Cold or Warm Windows:Computer Model Development and Experimental Validation”Building and Environment, Vol. 38, pp. 427-434.

3. Cengiz, T. G., and Babalik, F. C., 2007, “An on-the-road Experiment into the Thermal Comfort of Car Seats”Applied Ergonomics, Vol. 38, pp. 337-347.

4. Yakhot, V., and Orszag, S. A., 1986, “Renormalization Group Analysis of Turbulence: I. Basic Theory”Journal of Scientic Computing, Vol. 1(1), pp. 1-51.

6. Mariani, J. D., Zilliac, G. G., Chow, J. S., and Bradshaw, P., 1995, “Numerical/Experimental Study of a Wingtip Vortex in the Near Field” AIAA Journal, Vol. 33(9), pp. 1561-1568.