基于浅埋当量圆柱体热工的电力管廊通风研究

Study on Ventilation of Power Pipe Gallery based on Thermal of Shallow Buried Equivalent Cylinder

为研究地下电力管廊内热量组成,通风余热负荷及具体通风方案,以株洲某电力管廊为工程依托,采用简化浅埋当量圆柱体的热工理论计算,研究电力管廊内的电缆散热、围护壁面冷却、设备散热等热量损益情况,综合分析得出管廊计算通风量,结合CFD空气动力学模拟,分析简化浅埋当量圆柱体热工理论计算风量方案下电力管廊的温度场,通风量计算方法的适用性。依据电力管廊通风量,制定出地下电力管廊的通风方案,电力管廊由于散热量大及风量大的特性,各舱室分别设置风亭,充分利用风亭侧面积,减小风亭尺寸,美化风亭的视觉效果。

An underground power pipe rack in Zhuzhou was chosen to study the heat components,ventilation heat load and ventilation scheme,combined with the thermal calculation model of simplified equivalent cylinder,the heat gain and loss of cable heat dissipation,wall surface cooling and equipment heat dissipation in the power pipe rack under different analysis methods were studied,and the heat load of pipe rack was concluded.Combined with CFD,the temperature field of power pipe gallery under the simplified thermal theory of shallow buried equivalent cylinder and the applicability of ventilation calculation method are analyzed;Then according to the heat load,fire unit and fire distance,the ventilation scheme of underground power pipe rack is formulated.Due to the characteristics of large heat dissipation and large air volume rate,the wind pavilion is better to set for each cabin to make full use of the side area of the pavilion,and reduce the size of wind pavilion,beautify the visual effect of wind pavilion.