密閉建筑空間缺氧環境下富氧特性研究

張傳釗; 劉應書; 王浩宇; 吳義民; 馬曉鈞; 陳福祥

doi:10.13374/j.issn2095-9389.2018.11.012

密閉建筑空間缺氧環境下富氧特性研究

doi: 10.13374/j.issn2095-9389.2018.11.012

1) 北京聯合大學生物化學工程學院, 北京 100023;
2) 北京科技大學能源與環境工程學院, 北京 100083

基金項目:

北京市自然科學基金資助項目(8174064,8182019)

國家自然科學基金資助項目(51578065)

北京市教育委員會科技計劃一般資助項目(KM201711417014)

北京高等學校青年英才計劃資助項目(YETP1748)

詳細信息

中圖分類號: TQ116.14
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出版歷程
- 收稿日期: 2018-06-11

Oxygen enrichment characteristics of an enclosed architectural space under anoxic conditions

1) College of Biochemical Engineering, Beijing Union University, Beijing 100023, China;
2) School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China

摘要

摘要: 搭建了一套密閉建筑空間室內供氧實驗裝置,分別研究送氧口個數、送氧口管徑、送氧流量及送氧方式的不同對建筑空間室內的富氧特性及富氧效果的影響.結果表明:送氧口個數、管徑、流量及送氧方式不同時,氧氣軸向最大濃度分布隨軸向距離的增加呈遞減趨勢,且距離送氧口軸向距離0~0.55 m的范圍內,氧氣軸向濃度迅速降低;單送氧口時,送氧口管徑及送氧流量不同時所形成的富氧范圍大體呈扁橢圓形狀,且送氧管徑相同時送氧流量越大,富氧范圍也越大;雙送氧口豎直向前和相對45°方式進行送氧所形成的富氧范圍接近"一頭尖一頭圓"的扇形,且豎直向前所形成的富氧范圍比相對45°送氧所形成的富氧范圍要大;采用雙送氧口相背45°方式進行送氧時,管徑為6 mm的雙送氧口所形成的富氧范圍大體呈2片扇葉形狀;管徑為10 mm的雙送氧口所形成的富氧范圍大體呈2個半圓形狀;總送氧流量為1 m³·h^-1時,6 mm管徑的雙送氧口相背45°送氧范圍最大,10 mm管徑的雙送氧口豎直向前送氧范圍最小;相同的總送氧流量及送氧方式下,單送氧口豎直向前送氧所得到富氧面積比雙送氧口豎直向前送氧所得到富氧面積大20%左右;相同的送氧口個數、送氧口流量及送氧方式下,管徑為6 mm的送氧口所得到的富氧面積比管徑為10 mm的送氧口所得到的富氧面積大60%左右.
- 缺氧環境 /
- 富氧特性 /
- 送氧方式 /
- 富氧面積
Abstract: A set of experimental devices for the measurement of indoor oxygen supply in an enclosed architectural space was built. The devices were used to analyze the effects of the number and diameter of oxygen-feeding ports, oxygen flow rate, and oxygen-feeding mode on the indoor oxygen enrichment characteristics and efficiency of an architectural space. Results show that the distribution of the maximum axial oxygen concentration tends to decline with axial distance under different numbers and diameters of oxygen-feeding ports, oxygen flow rates, and oxygen-feeding modes. Axial oxygen concentration rapidly decreases when the axial distance to the oxygen-feeding port ranges from 0 m to 0.55. In general, the oxygen-enriched region that forms in a single oxygen-feeding port under different pipe diameters and oxygen flow rates presents a flat elliptical shape. The oxygen-enriched area expands under a constant oxygen-feeding pipe diameter and an increasing oxygen flow rate. The oxygen-enriched area that forms in double oxygen-feeding ports, wherein one is positioned vertically forward and the other port is positioned 45° opposite the forward-facing port, has a bifurcated shape with one pointed head and one rounded head. The oxygen-enriched area that forms in the vertical forward-facing port is larger than that in the 45° opposing port. Under back-to-back oxygen feeding, the oxygen-enriched area that forms in double oxygen-feeding ports with the pipe diameter of 6 mm generally exhibits a two-bladed fan shape, whereas that in double oxygen-feeding ports with the pipe diameter of 10 mm appears as two overlapping semicircles. Under the total oxygen delivery flow rate of 1 m³·h^-1, the range of oxygen feeding in double oxygen-feeding ports with the pipe diameter of 6 mm and 45° angle is the largest and that in double oxygen-feeding ports with the pipe diameter of 10 mm and vertical forward position is the smallest. Under a constant total oxygen flow rate and oxygen-feeding mode, the oxygen-enriched area that forms in the single oxygen-feeding port in the vertical forward position is 20% larger than that in the double oxygen-feeding ports in the vertical forward position. Under the same number of oxygen-feeding port, oxygen flow rate, and oxygen-feeding mode, the oxygen-enriched area in the oxygen-feeding port with the pipe diameter of 6 mm is approximately 60% larger than that in the oxygen-feeding port with the pipe diameter of 10 mm.
- anoxic conditions /
- oxygen enrichment characteristics /
- oxygen-feeding mode /
- oxygen-enriched area

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參考文獻(4)

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