【作者】 彭鹏；

【导师】 朱能；

【作者基本信息】 天津大学 ， 供热、供燃气、通风与空调工程， 2004， 硕士

【摘要】 本研究以美国NIST(National Institute of Standards and Technology)所发展的CONTAMW作为分析工具,其主要功能是用来分析多区域气流及污染扩散等问题。该软件可解决建筑物内外部气流渗透、外部风压及温度所造成的热浮力作用等问题。本研究的以大气温度、室内温度、室外风速等参数为主,通过模拟分析以上各种参数对气压的影响程度。通过模拟对比结果发现,相比风压所引起的室内外压差,热压的影响程度明显小得多。根据一实际典型负压隔离病房做多种压差控制设计。用PHOENICS软件模拟不同换气次数和室内外压差下,室内污染物的扩散情况和浓度分布情况。结合北京309医院的负压隔离病房的实地检测,在相同条件下,用实验数据验证模拟的准确性。进而结合实地情况,研究最佳送风和压差配比的方案,在较为经济和科学的前提下,提出合理的负压隔离病房控制污染扩散的方案。更多还原

【Abstract】 This research used the computer program CONTAMW developed by NIST.CONTAMW is a multizone indoor air quality and ventilation analysis programdesigned to determine: airflows and pressure-infiltration, and room-to-room airflowsand differences pressure in building systems driven wind pressure acting on theexterior of the building, and buoyancy effects induced by temperature differencesbetween the building and the outside;contaminant concentrations –the dispersal ofairborne contaminants transported by these airflows.Based on a negative pressure isolation ward, several pressure difference aircontrol scheme were designed. The use of CFD software —PHOENICS has beenprogrammed to simulate different ACH and pressure difference accordingly designedparameter to obtain the dispersal of airborne contaminants and concentrations drivenby mechanical means. The CFD software validation was proved out by combiningwith the practical surveys of the negative pressure isolation ward experimentation.Based on the simulation results improved differences pressure and ACH was proposedand optimized.更多还原