摘要
对燃气辐射采暖建筑的房间外墙体传热过程进行数值模拟研究和理论分析。通过建立热平衡方程,对比分析了辐射采暖与对流采暖的房间热损失。以某燃气供热厂房为例,通过数值模拟,给出外墙内表面温度沿垂直方向上的波动分布特点,以及外墙表面黑度对采暖能耗及工作区空气温度的影响。结果表明,降低外墙体内表面黑度,可以降低墙体表面温度,从而降低采暖能耗,同时提高工作区的空气温度。当墙体表面黑度由0.9降到0.3时,墙体热损失由864W降到820W,而工作区平均温度从288.2K升高到292.5K。
The numerical simulation and theoretical analysis for wall heat transferring process of the gas-infrared heated room is study in paper.The thermal equilibrium equation is established,and the heat loss is analyzed between radiant heating system and convection heating system.Taking a gas heating plant as an example,through numerical simulation,the influence of the temperature distribution along the vertical direction of the external surface temperature of the external wall on the energy consumption and air temperature of the working area is also discussed The results show that reducing the external body surface emissivity,can reduce the wall surface temperature and reducing the energy consumption,at the same time improve the work area air temperature.When the wall surface emissivity from 0.9 to 0.3,the wall heat loss is reduced from 864W to 820W,and working area average temperature from 288.2K rise to 292.5K.
出处
《节能》
2018年第8期31-33,共3页
Energy Conservation
关键词
辐射采暖
传热过程
黑度
温度分布
gas-infrared heating
heat transfer
emissivity
temperature distribution
