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万达地下停车库通風管道

作者：編輯：來源：发布日期： 2019.04.26

信息摘要：

隨著城市現代化建設的不斷發展，城市用地日益緊張，私人擁有汽車數量不斷增加，因應停車的需要，大型地下停車庫不斷湧現，在大型地下停車場的建設中，…

万达地下停车库通風管道

隨著城市現代化建設的不斷發展，城市用地日益緊張，私人擁有汽車數量不斷增加，因應停車的需要，大型地下停車庫不斷湧現，在大型地下停車場的建設中，如何有效解決地下停車庫的通風和防排煙的問題是地下停車場設計中的一個重要問題。

　　一、地下汽車庫排風量的計算

　　汽車尾氣的主要有害物爲CO、NOX及少量其它氣體。以CO及NOX爲主。因CO及NOX對人體的作用不同，其全方面通風換氣量（即排氣量）應分別計算稀釋CO及NOX所需的換氣量，然後取大值。

　　二、排煙量的計算

　　根据《汽车库、修车库、停车场设计防火规范》地下停车库的排烟量应按换气次数不小于6次/h计算，一般取6次/h。

　　三、通風氣流組織設計

　　根據《采暖通風與空氣調節設計規範》第5.3.11條當放散氣體的密度比空氣重，建築內放散的顯熱不足夠形成穩定的上升氣流而沈積在下部區域時，宜從下部區域排出總排風量的2/3，上部區域排出總排風量的1/3。那麽排風口的布置應滿足下部排風口面積是上部排風口面積的2倍，且排風口宜均勻位置，盡可能靠近汽車尾部。

　　四、排煙氣流組織設計

　　根據《汽車庫、修車庫、停車場設計防火規範》第8.2.3條每個排煙分區應設置排煙口，排煙口宜設在頂棚或靠近頂棚的牆面上，排煙口距防煙分區內距離上限的水平距離不應多過30m，這就要求排煙口應該全布置在上部。

　　綜上，如果將地下停車庫通風風管和排煙風管設置兩個單獨的系統，這會使風機、管道的投資大大增加，而且對停車場的層高有了更高的要求，也大幅增加了土建的建設投資，所以在設計中一般都將地下停車場的通風和排煙兩個系統合二爲一。如何解決好這兩個系統的矛盾是設計中要考慮的重要問題。目前做法一般是：

　　（1）按照排風量和排煙量兩者當中大者計算系統風管尺寸。

　　（2）根據計算地下停車庫的通風量的換氣次數一般在5~7次/h，排煙量一般是以6次/h計算，只要根據排風量和排煙量兩者當中大者選用單速風機即可。

　　（3）根據通風量的1/3設置上部排風口，通風量2/3設置下部排風口，再根據排煙量校核上部排風口是否滿足排煙要求，否則適當調整上部排風口面積，排風口均帶調節閥，以控制上部和下部區域的排風量。且下部排風口設電動啓閉裝置，在發生火災時，可就地或遠程啓閉風口，滿足排煙要求。

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A portion of the way took our friends through the grounds of some of the castles, and the boys were rather astonished at the extent of these residences of princes. Doctor Bronson explained that Tokio was formerly a city of princes, and that the residences of the Daimios, as these great men were called, were of more consequence at one time than all the rest of the city. The palace of a Daimio was known as a yashiki, and the yashikis were capable, in some instances, of lodging five or ten thousand men. Under the present government the power of the princes has been taken away, and their troops of retainers have been disbanded. The government has converted the most of the yashikis into offices and barracks and schools, and one at least has been turned into a manufactory. "And I know a miss," said Fred, "that is better than any mile we have had to-day." I drew the counterpane aside, lay down under it revolver in hand, and then, for the first time since I had put on the glorious gray, found I could not face the thought of death. I grew steadily, penetratingly, excruciatingly cold, and presently--to the singular satisfaction of my conscience--began to shake from head to foot with a nervous chill. It was agonizing, but it was so much better than the spiritual chill of which it took the place! I felt as though I should never be warm again. Yet the attack slowly passed away, and with my finger once more close to the trigger, I lay trying to use my brain, when, without prayer or plan, I solved the riddle, what I should do, by doing the only thing I knew I ought not to do. I slept. "He is not hunting her; yet, should he find her, I have the fear he would do his duty as a soldier, anyhow. No, he was looking, I think, for Ferry's scouts." In vain the Doctor tried to throw off his heavy reflections and assume the air of gaiety usual to him when drinking his coffee and thinking of Lilian. Such an oppression could hardly be ascribed to the malady of love. It was not Romeo's "heavy lightness, serious vanity." It was a deep perplexity, a grave foreboding that something had gone hideously wrong with him, something that he was unable to diagnose. It could not be that he was growing old. As a medical man he knew his age to an artery. And yet, in spite of his physical culture and rather deliberate chastity, he felt suddenly that he was not a fit companion for this young girl with her resilient mind. He had always been fastidious about morals, without being exactly moral, but there was something within him that he did not care to contemplate. It almost seemed as though the sins of the mind were more deadly than those of the flesh, for the latter expressed themselves in action and re-action, while the former remained in the mind, there to poison and corrupt the very source of all activity. "Look at the bottom of those saucepans," said Lawrence. "See how they are smoked; at the same time there is no soot on them. Our quarry has not dared to light a fire by reason of the smoke. It is quite plain that Hetty was not mistaken when she said she saw a hand holding a kettle over the gas. And, by Jove, this kettle is warm still!" Examining machines made by the best designers, it will be found that their dimensions bear but little if any reference to calculated strains, especially in machines involving rapid motion. Accidents destroy constants, and a draughtsman or designer who does not combine special and experimental knowledge with what he may learn from general sources, will find his services to [89]be of but little value in actual practice. (1.) What limits the speed at which the reciprocating parts of machines may act?—(2.) What is the nature of reciprocal motion produced by cranks?—(3.) Can reciprocating movement be uniform in such [108] machines as power-hammers, saws, or pumps?—(4.) What effect as to the rate of movement is produced by the elastic connections of a trip-hammer? With regard to those more refined aspects of temperance, in which it appears as a restraint exercised by reason over anger, pity, and grief, Epicurus and his followers refused to go all lengths with the Stoics in their effort to extirpate emotion altogether. But here they seem not to have proceeded on any fixed principle, except that of contradicting the opposite school. 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They came around him and offered him their horses, dismounting even, and forcing the reins into his hands. "You don't know what you are doing," a corporal urged. "You'll never get out alive. If it ain't Indians, it'll be thirst." Then he looked into Cabot's face and saw that he did know, that he knew very well. And so they left him at last, with more of the tepid alkali water than they well could spare from their canteens, with two days' rations and an extra cartridge belt, and trotted on once more across the plain. The impeachment of Oxford followed. On the 9th of July, 1715, Lord Coningsby, attended by many of the Commons, carried up to the Lords the articles against him, sixteen in number, to which afterwards six more were added. The first fifteen related to the Peace of Utrecht; the sixteenth to the sudden creation of twelve peers in 1711, in order to create a Tory majority, by which it charged him with highly abusing the constitution of Parliament and the laws of the kingdom. When the Articles had been read, it was doubted whether any of the charges amounted to high treason. To decide this as a legal point, it was moved that the judges should be consulted; but this motion was rejected, and another was made to commit Oxford to the Tower; and, though reprieved a few days on account of an indisposition, he was committed accordingly, having made a very solemn plea of his innocence, and of having only obeyed the orders of the queen, without at all convincing the House. He continued to lie in the Tower for two years before he was brought to trial, matters of higher public interest intervening. Eventually the impeachment was dropped, the documentary evidence being considered insufficient. GEORGE II. AT DETTINGEN, 1743. [See larger version] Parliament met on the 10th of January, 1765. The resentment of the Americans had reached the ears of the Ministry and the king, yet both continued determined to proceed. In the interviews which Franklin and the other agents had with the Ministers, Grenville begged them to point to any other tax that would be more agreeable to the colonists than the stamp-duty; but they without any real legal grounds drew the line between levying custom and imposing an inland tax. Grenville paid no attention to these representations. Fifty-five resolutions, prepared by a committee of ways and means, were laid by him on the table of the House of Commons at an early day of the Session, imposing on America nearly the same stamp-duties as were already in practical operation in England. These resolutions being adopted, were embodied in a bill; and when it was introduced to the House, it was received with an apathy which betrayed on all hands the profoundest ignorance of its importance. Burke, who was a spectator of the debates in both Houses, in a speech some years afterwards, stated that he never heard a more languid debate than that in the Commons. 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