某特长隧道火灾工况网络通风计算

以乌东德水电站右岸对外交通老鹰窝特长隧道为例,研究射流风机联动方式、施工支洞作为逃生通道对火灾工况下延期流动的影响。采用火灾网络通风的计算方法研究4个防火分区分别发生火灾时隧道洞内空气流动规律及对交通、防火等的影响,得出各工况下防止烟气逆流的通风排烟方式。

地铁屏蔽门渗漏风量的计算分析及应用

以广州地铁某典型地下岛式车站为例,采用通风网络计算法,分析计算列车停站期间通过车站屏蔽门(PSD)的渗漏风量;与实际测试结果进行分析对比,验证计算结果的准确性。实践表明,通风网络计算法可以用来计算屏蔽门的渗漏风量,能克服实测中测试设备布置的不便及数值模拟中建模时间长、计算复杂的弊端,是一种快捷、准确且满足工程精度要求的计算方法,对地铁车站空调通风系统的设计及运营有重要的指导意义。

山东苍山铁矿主井溜破系统通风方案优化

针对山东苍山铁矿主井溜破系统存在的通风问题,运用通风网络优化技术、通风机站优化技术以及计算机通风网络模拟技术展开了通风方案研究。在充分利用现有通风设施及通风井巷工程的基础上,在溜破系统-334 m破碎水平、-349 m皮带道水平及-400 m粉矿回收水平的主井联巷各安装了1台K45-6-№12风机(18.5 k W/台),经计算机网络模拟解算,结果表明:溜破系统主井的出风量为35.4 m^3/s,有助于解决主井进风问题,改善井下作业人员的工作环境,提高井下劳动生产率,为矿山安全生产提供有力保障。

安徽付老庄铁矿通风系统优化

针对付老庄铁矿存在的风流紊乱及风道短路等问题,通过综合应用矿井通风系统三维动态模型技术、网络优化技术、机站优选技术和风机优选技术,提出了切实可行的通风系统管路布置优化方案。方案实施后,减少了系统装机功率320 kW,降低了系统实耗功率151.1 kW,提高了系统有效风量率10.9%、风机平均效率16.8%,可供类似矿山通风系统优化设计参考。

Method of branch ariflow for calculatinga complicated mine ventilation networks

The solutions widely used at present for calculating complicated mine ventilation networks are ones in which resistance of the branches and characteristic parameters of the fans are taken as basic input data. But it is time and energy consuming to obtain the branch resistance values. A new solution is developed in this paper in which the branch resistance values are obtained through measuring and evaluating the airflow of the whole ventilation network. Theoretical analysis is made of the establishment of a linear equation series with branch resistance as unknown numbers, an equation series for which one, and only one, result of solutions exists. This solution is programmed in C language and passed on a personal computer. The programmed solution programmed proves of practical use, as demonstrated by specific examples. Being different from other solutions, the method takes the branch airflow and fan working points as basic input data, and the present solution is of greater advantage for calculating ventilation networks of mines in operation.