复杂通风网络总风阻快速计算方法

发布时间：2018-03-31 20:54

本文选题：安全工程　切入点：矿山安全　出处：《安全与环境学报》2016年01期

【摘要】：为了快速计算通风网络总风阻和当通风网络中安装多台风机时各风机所承担的总风阻,将通风网络中安装风机的分支设置成固定风量分支,利用通风网络回路阻力平衡定律构建通风网络所有独立回路阻力平衡方程;在这组方程中,存在一组含固定风量分支的方程,其中的每个方程所对应的回路总阻力不为0,该回路总阻力需要用安装在每个固定风量分支上的风机所提供的风压才能抵消,使之归零;该组方程可用于求解通风网络总风阻和当通风网络中安装多台风机时各风机所承担的总风阻。结果表明:1)当通风网络只安装1台风机时,通过将打算安装风机的分支设为固定风量分支,可求出当风机安装在该分支时所承担的总风阻,该值与风量无关;对于同一个通风网络,安装风机的分支不同,所对应的总风阻也不同;2)当通风网络中安装多台风机时,通过将安装风机的所有分支均设置为固定风量分支,可求出各风机所承担的总风阻;此时,1台风机所负担的通风网络总风阻与风机数量、各风机的输出风量和安装位置相关。计算总风阻时,只要解算一次通风网络,依据回路阻力代数和不为0的回路,即可求出通风网络总风阻或多台风机各自所承担的总风阻。
[Abstract]:In order to quickly calculate the total wind resistance of ventilation network and the total wind resistance of each fan when multiple typhoon turbines are installed in the ventilation network, the branches of the installation fan in the ventilation network are set to a fixed air volume branch. All independent loop resistance equilibrium equations of ventilation network are constructed by using the law of ventilation network loop resistance balance, in which there is a set of equations with fixed air flow branch. The total resistance of the circuit corresponding to each equation is not zero, the total resistance of the loop needs to be offset by the wind pressure provided by the fan installed on each fixed air flow branch, and the total resistance can be reduced to zero. The set of equations can be used to solve the total wind resistance of ventilation network and the total wind resistance of each fan when the ventilation network is equipped with multiple typhoon engines. The results show that when only one typhoon is installed in the ventilation network, By setting the branch to which the fan is intended to be installed as a fixed air flow branch, the total air resistance incurred when the fan is installed in the branch, which is independent of the air volume, can be calculated; for the same ventilation network, the branch of the fan is different. The corresponding total air resistance is also different (2) when multiple typhoon machines are installed in the ventilation network, the total air resistance of each fan can be calculated by setting all the branches of the installation fan to the fixed air volume branch. At this time, the total air resistance of the ventilation network is related to the number of fans, the output air volume of each fan and the installation position. When calculating the total air resistance, only one ventilation network can be solved, according to the algebra of loop resistance and the circuit not equal to zero, The total wind resistance of ventilation network or the total wind resistance of multiple typhoon machines can be calculated.
【作者单位】：西安建筑科技大学管理学院;
【基金】：陕西省自然科学基础研究计划重点项目(2015JZ010) 陕西省社会科学基金项目(2014P07) 陕西省科学技术研究发展计划项目(2013K11-17)
【分类号】：TD722

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