低温地板辐射采暖室内颗粒物分布模拟研究
|
摘要
采用计算流体力学方法,针对低温地板辐射采暖房间存在室内颗粒污染源时,对室内颗粒物随时间、空间变化的运动特性进行了数值模拟研究。研究结果表明,室内污染源(Z=1.5 m的发烟器平面)存在时,在t=60 s时,2.5μm的颗粒物已经扩散到整个房间内。小粒径(dp<5μm)的颗粒物受到浮升力的作用随气流的跟随性很强,而大粒径(dp>10μm)的颗粒物受重力作用大部分聚集在地面附近。
Using CFD method, the temperature field, particle concentration with time and space was simulated in a low temperature floor radiant heating room. The results show that 2.5 μm particles have diffused into the whole room at t=60 s when the indoor pollution source located at Z=1.5 m of the smoke plane. The particles with small particle size(dp<5μm) is dominated by buoyancy force. The gravitational sedimentation is the primary reason for the particles with large particle size(dp>10μm).
Using CFD method, the temperature field, particle concentration with time and space was simulated in a low temperature floor radiant heating room. The results show that 2.5 μm particles have diffused into the whole room at t=60 s when the indoor pollution source located at Z=1.5 m of the smoke plane. The particles with small particle size(dp<5μm) is dominated by buoyancy force. The gravitational sedimentation is the primary reason for the particles with large particle size(dp>10μm).
引文
[1]Sattari S,Farhanieh B.A parametric study on radiant floor heating system performance[J].Renewable Energy,2006,31(10):1617-1626.
[2]Hasan A,Kurnitski J,Kai J.A combined low temperature water heating system consisting of radiators and floor heating[J].Energy&Buildings,2009,41(5):470-479.
[3]Bozk1r O,Canbazo?lu S.Unsteady thermal performance analysis of a room with serial and parallel duct radiant floor heating system using hot airflow[J].Energy&Buildings,2004,36(6):579-586.
[4]Causone,Francesco,Baldin,et al.Floor heating and cooling combined with displacement ventilation:possibilities and limitations[J].Energy&Buildings,2010,42(12):2338-2352.
[5]岳晓敏.地板采暖与散热器采暖房间颗粒物分布的对比分析[D].太原:太原理工大学,2010.
[6]Golkarfard V,Talebizadeh P.Numerical comparison of airborne particles deposition and dispersion in radiator and floor heating systems[J].Advanced Powder Technology,2014,25(1):389-397.
[7]王福军.计算流体动力学分析-CFD软件原理与应用[M].北京:清华大学出版,2005
[8]陶文铨.数值传热学(第二版)[M].西安:西安交通大学出版社,2001.
[9]段中喆.ANSYS FLUENT流体分析与工程实例[M].北京:电子工业出版社,2015.
[2]Hasan A,Kurnitski J,Kai J.A combined low temperature water heating system consisting of radiators and floor heating[J].Energy&Buildings,2009,41(5):470-479.
[3]Bozk1r O,Canbazo?lu S.Unsteady thermal performance analysis of a room with serial and parallel duct radiant floor heating system using hot airflow[J].Energy&Buildings,2004,36(6):579-586.
[4]Causone,Francesco,Baldin,et al.Floor heating and cooling combined with displacement ventilation:possibilities and limitations[J].Energy&Buildings,2010,42(12):2338-2352.
[5]岳晓敏.地板采暖与散热器采暖房间颗粒物分布的对比分析[D].太原:太原理工大学,2010.
[6]Golkarfard V,Talebizadeh P.Numerical comparison of airborne particles deposition and dispersion in radiator and floor heating systems[J].Advanced Powder Technology,2014,25(1):389-397.
[7]王福军.计算流体动力学分析-CFD软件原理与应用[M].北京:清华大学出版,2005
[8]陶文铨.数值传热学(第二版)[M].西安:西安交通大学出版社,2001.
[9]段中喆.ANSYS FLUENT流体分析与工程实例[M].北京:电子工业出版社,2015.