地下汽车库的防排烟设计

分析火灾时烟气流动的规律。阐述作者对目前消防规范的理解,并指出规范中需要进一步明确的内容。     

烟气余热回收复合制冷系统的可行性研究

基于工业余热回收,提出一种"热水型和蒸汽型吸收式复合制冷系统"。通过对某电厂的余热进行回收,利用该复合系统对数据中心供冷,并与纯蒸汽系统进行对比。从节能性方面,对复合系统冷冻水供回水温度在7/12℃和12/18℃下的能耗进行分析,得出后者比前者节能6.5%,且该复合系统全年可节省2.3×10~7Nm^3天然气。环保性方面,烟气的排烟温度最低温度降到39.1℃,最高温度降到49.2℃,完全高于烟气的露点温度58.7℃,可以减少烟气的白羽现象,对环境保护具有一定效果。     

Influence of the slope in the ventilation semi-transversal system of an urban tunnel

The covering of a section of the Inner Belt roadway (“Ronda del Mig”) in Barcelona gives rise to an urban tunnel of great length (1535 m). The tunnel is divided into two independent parallel galleries and its orientation is North–South, with a 2% upward slope towards the North. Although normal ventilation is achieved with jet fans, between the two galleries there is an interior passage for smoke extraction, in case of fire, through exhaust openings on both sides of this passage. Therefore, the tunnel has a semi-transversal ventilation system for fire incidents.The behavior of the smoke generated during those possible fire incidents in the traffic galleries was simulated with a commercial code, FLUENT^®, which allows a three-dimensional multispecies Navier–Stokes unsteady simulation. The mesh of each tunnel was made with about 250,000 triangular base prismatic cells. The simulated fire had a thermal power of 30 MW and the time step was set to one second, while the simulation covered 15 min.Special emphasis was put on the influence of the tunnel slope on the smoke’s behavior in each gallery. Simulation results showed that the fans’ capacity established in the project specifications was not enough to extract the smoke of a fire with the simulated power. A significant percentage of the smoke was aspirated through the exhaust openings but the rest continued rising to the tunnel portal due to the slope. This created a great risk mainly in the descending gallery with opposite traffic direction. For a more efficient extraction it was determined that the exhaust sections should be opened upward of the fire’s location. The standard opening, at both sides of the fire, reduced the capacity to extract smoke due to clean air aspiration from the lower portal.     

桂林漓江大瀑布饭店暖通空调设计

本文介绍了该饭店暖通空调方面的设计,包括空调、采暖、通风、防排烟等内容。重点介绍中庭空调系统设计以及设计的一些体会和经验。     

福州大饭店空调设计

介绍福州大饭店的空调、通风及防排烟设计,并提出一些设计中应注意问题。     

教化小区综合楼暖通空调设计

文中介绍了教化小区综合楼暖通空调系统的设计,阐述其在空调系统、通风系统、冷热源、水系统、防排烟、空调自控及消声减振等方面的设计及空调方式和新风量的选取。保持大厦内温度、湿度分布均匀,活动区风速在设计范围内,空调设备噪声较小。     

电场中烟尘粒子凝集增粗的实验研究

应用电流体力学和外力场输运理论,分析了电收尘器电场中带电烟尘粒子的凝集现象。在一定的简化条件下建立了粒子凝集速率计算式,并通过实验进一步探讨了带电烟尘粒子凝集增粗的机理。研究结果表明,电场中带电烟尘粒子的凝集受粒子表面电荷分布和电荷量、粒径、粒子所带电荷的极性以及中性电荷粒子的影响。无论单极或双极电晕,带电的烟尘粒子都发生凝集,但带正、负电荷粒子的凝集受限于某一作用范围。     

关于高层建筑地下车库通风与防排烟设计的看法

本文简要介绍了地下车库设置排风系统的必要性、防火分区和防烟分区的划分原则,对防排烟系统的排风量和排烟量计算、对排风系统与排烟系统合用的可行性及应注意的问题进行了详细的论述,并通过工程实例分析,阐述了高层建筑地下车库平时通风与火灾时排烟合用系统的设计要点。     

厦门某影剧院空调设计及分析

介绍该影剧院的空调系统配置,并结合建筑本身的特点及空调区域功能要求介绍舞台及观众厅的空调气流组织形式、通风系统设计及消防排烟系统设计特点。     

酒店厨房暖通设计介绍及细节要点

通过对酒店厨房通风系统的设计、冷菜间VRV空调设计、垃圾房风幕机设计和冷库设计的详细介绍,全面的讨论了酒店厨房暖通空调设计。并对其中的细节要点进行总结;同时．就酒店厨房防排烟的设计进行了讨论并给予了个人的意见。