【摘要】：綜合交通樞紐的建設(shè)提高了城市交通的運(yùn)輸能力，為公眾提供了方便快捷、安全可靠的出行條件，但巨大的車流量和人流量產(chǎn)生了很多污染物，其中汽車尾氣和人體呼吸產(chǎn)生的二氧化碳是室內(nèi)的主要污染物。汽車尾氣中的污染物種類可達(dá)十多種，其中有多種氣體對(duì)人體有害。室內(nèi)二氧化碳濃度過高，會(huì)導(dǎo)致呼吸急促，引起頭痛、血壓升高等癥狀。本文通過研究室內(nèi)污染物分布特點(diǎn)，對(duì)建筑形式和通風(fēng)空調(diào)系統(tǒng)提出優(yōu)化設(shè)計(jì)，為改善交通樞紐的室內(nèi)環(huán)境提供參考。 本文以長(zhǎng)沙市某綜合交通樞紐的車輛備班樓為例，采用數(shù)值模擬方法對(duì)長(zhǎng)途發(fā)車備班區(qū)、短途發(fā)車備班區(qū)和候車室的速度場(chǎng)、溫度場(chǎng)、污染物濃度場(chǎng)和空氣齡進(jìn)行數(shù)值模擬，從而評(píng)價(jià)通風(fēng)空調(diào)系統(tǒng)設(shè)計(jì)的合理性，，對(duì)不合理的地方進(jìn)行優(yōu)化并通過模擬來驗(yàn)證。 由于建筑形式對(duì)室內(nèi)污染物分布有重要影響，本文通過七種不同外墻開敞模型的模擬分析，對(duì)長(zhǎng)途發(fā)車備班區(qū)的建筑形式提出優(yōu)化方案。通過對(duì)比不同風(fēng)速下室內(nèi)污染物濃度分布情況，發(fā)現(xiàn)送風(fēng)速度對(duì)室內(nèi)污染物濃度有重要影響，較高的送風(fēng)速度能提高室內(nèi)污染物的排除效率。針對(duì)短途發(fā)車備班區(qū)局部區(qū)域CO濃度過高和室內(nèi)平均風(fēng)速過大以及候車室局部區(qū)域CO濃度不均勻和溫度過高的問題，提出優(yōu)化方案。優(yōu)化后的模擬結(jié)果顯示，短途發(fā)車備班區(qū)室內(nèi)CO平均濃度降低了10%，平均風(fēng)速降低了5%；候車室室內(nèi)CO_2平均濃度降低了6.7%，梯形區(qū)域的溫度降低明顯，降幅達(dá)到2~3℃。
[Abstract]:The construction of integrated transportation hub improves the transportation capacity of urban traffic and provides convenient, safe and reliable travel conditions for the public. However, the huge traffic volume and human flow produce a lot of pollutants. The carbon dioxide produced by automobile exhaust and human breathing is the main indoor pollutant. There are more than ten kinds of pollutants in automobile exhaust, among which many kinds of gases are harmful to human body. High levels of indoor carbon dioxide can lead to shortness of breath, headache, elevated blood pressure and other symptoms. By studying the distribution characteristics of indoor pollutants, the optimal design of building form and ventilation and air conditioning system is put forward in this paper, which provides a reference for improving the indoor environment of transportation hub. Taking the vehicle standby building of a comprehensive transportation hub in Changsha as an example, the numerical simulation method is used to simulate the velocity field, temperature field, pollutant concentration field and air age of the long distance departure preparation area, the short distance departure standby area and the waiting room. Therefore, the rationality of ventilation and air conditioning system design is evaluated, and the unreasonable place is optimized and verified by simulation. Because of the important influence of building form on the distribution of indoor pollutants, this paper puts forward the optimization scheme of building form of long-distance departure area through the simulation and analysis of seven kinds of external wall open models. By comparing the distribution of indoor pollutant concentration under different wind speeds, it is found that the air supply velocity has an important effect on the indoor pollutant concentration, and a higher air supply speed can improve the removal efficiency of indoor pollutants. Aiming at the problems of high concentration of CO in the local area of short departure preparation area, excessive average indoor wind speed and uneven CO concentration and high temperature in the local area of waiting room, the optimization scheme is put forward. The optimized simulation results show that the average indoor CO concentration and the average wind speed are reduced by 10% and 5% respectively; The average concentration of CO_2 in the waiting room was decreased by 6.7 鈩

本文編號(hào)：2385044