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| 空调末端分布对长直隧道内空气温度稳定性的影响 |
| Impact of air-conditioning terminal distribution on air temperature stability in long straight tunnels |
| 投稿时间：2024-07-22 |
| DOI：10.13259/j.cnki.eri.2025.03.002 |
| 中文关键词: 长直隧道通风|气流组织|计算流体力学|模拟|大科学装置|温度梯度 |
| 英文关键词:long straight tunnel ventilation airflow organization computational fluid dynamics simulation large scientific facility temperature gradient |
| 基金项目:上海市“科技创新行动计划”社会发展科技攻关项目（21DZ1203103） |
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| 中文摘要: |
| 某波荡器设备布置在长400 m的隧道内，因此需对隧道内空气温度进行严格控制。由于隧道内设备散热量大且空间相对狭小，空调系统采用顶端送风(多送风终端)和两端集中回风的定风量全空气系统，并采用高精度控制以及大风量小温差送风。为了达到隧道内空气温度控制精度的设计要求，采用计算流体力学（CFD）数值模拟方法，比较送风口数量和风量相等情况下3种不同空调末端分布方案对隧道内空气温度控制精度的影响，其中：方案1为送风口均匀分布、等间距3.35 m；方案2为两端送风口间距较大，且随着送风管道向隧道中间延伸送风口间距逐渐变小；方案3的送风口分布模式与方案2的相反，随着送风管道向隧道中间延伸送风口间距逐渐加大。结果显示，方案3能够满足隧道内空气温度梯度要求：隧道内空气平均温度为26.1 ℃，轴向温度梯度小于0.1 ℃/(5 m)。本研究可为同类型长直风管送风的隧道内空气温度高精度调控提供工程应用参考。 |
| 英文摘要: |
| A wave oscillator device is installed in a 400-meter-long tunnel, necessitating stringent control of the tunnel’s air temperature. Due to the high heat dissipation of equipment and the confined space within the tunnel, a constant-air-volume (CAV) all-air system with ceiling supply (multiple supply terminals) and centralized return air at both ends is adopted. The system employs high-precision control and large airflow with small temperature difference supply to meet the design requirements for temperature control accuracy. Computational fluid dynamics (CFD) simulations are conducted to compare the effects of three different air-conditioning terminal distribution schemes—each with equal number of supply outlets and airflow volume—on temperature control precision within the tunnel. Scheme 1 features uniformly distributed outlets spaced every 3.35 m; Scheme 2 places outlets at wider intervals near both ends, gradually decreasing toward the tunnel center; Scheme 3 reverses Scheme 2’s pattern, with outlet spacing increasing toward the tunnel center. Results indicate that Scheme 3 best satisfies the tunnel’s temperature gradient criteria, achieving an average air temperature of 26.1 ℃ and an axial temperature gradient below 0.1 ℃/(5 m). This research provides an engineering reference for high-precision temperature regulation in similar long straight tunnels with ducted air supply. |
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