Abstract
In order to obtain the relationship between ventilation and heat transfer of tunnel under certain conditions, the paper analyses the convective heat transfer phenomenon under the limited conditions of driving tunnel. A simplified mathematical formula is established between heat transfer rate and air volume, which explained a phenomenon that the cooling effect is hard to be improved as air volume is increasing and in actual ventilation. According to the established mathematical formula, the ratio of heat transfer rate to air volume is analyzed in different circumstances through the field experiment and numerical simulation. A conclusion is drawn that the ratio of Φ/Q can be proposed to evaluate the ventilation cooling effect.
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