太阳墙扰流板的结构优化  

Structural Optimization of Solar Wall Spoiler

作　　者：张大鹏 王春敏 贾斌广 ZHANG Dapeng;WANG Chunmin;JIA Binguang

机构地区：[1]山东建筑大学热能工程学院,山东济南250101 [2]顿汉布什(中国)工业有限公司,山东济南250101

出　　处：《煤气与热力》2018年第12期29-35,共7页Gas & Heat

摘　　要：提出一种在集热板上设置开孔扰流板的太阳墙(用于加热室外新风),采用FLUENT软件,选取南京地区2017年2月20日12:00的室外空气温度、太阳辐照度,模拟分析不同进口风速下,扰流板孔径、孔间距以及扰流板间距对太阳墙换热效率、空气压力损失的影响。以较大换热效率、较小空气压力损失为目标,针对一定外形尺寸(高×长×厚为3 000 mm×1 000 mm×128mm)的太阳墙,优化扰流板(长×宽×厚为1 000 mm×50 mm×2 mm)孔径、孔间距以及扰流板间距,在进口风速为3 m/s时对优化效果进行验证。孔间距、扰流板间距一定时:在相同进口风速下,换热效率、空气压力损失均随孔径的增大而减小;在相同孔径下,换热效率、空气压力损失均随进口风速的增大而增大。孔径、扰流板间距一定时:在相同进口风速下,换热效率、空气压力损失均随孔间距的增大而增大,换热效率有趋于稳定的趋势;在相同孔间距下,换热效率、空气压力损失均随进口风速的增大而增大。孔径、孔间距、进口风速一定时:换热效率、空气压力损失均随扰流板间距的增大而减小。在进口风速为3 m/s条件下,对优化前后的太阳墙集热板温度场进行模拟比较。与优化后相比,优化前太阳墙集热器相同位置的温度明显偏高,尤其是在空气进口处的两侧集热板存在非常明显的高温区(最高温度达到130℃)。优化后的太阳墙集热板温度明显下降,最高温度为100℃,证明优化效果明显。A solar wall with an open-hole spoiler on heat collecting plate( for heating outdoor fresh air) is proposed.The outdoor air temperature and solar irradiance at 12:00 on February 20,2017 in Nanjing region are selected,and the effects of spoiler aperture,hole spacing and spoiler spacing on heat exchange efficiency and air pressure loss of solar wall at different inlet wind speeds are simulated and analyzed by the Fluent software.Taking larger heat exchange efficiency and smaller air pressure loss as the goal,for solar wall with certain dimensions( high × length × thickness 3000 mm × 1 000 mm × 128 mm),the aperture of the spoiler( length × width × thickness 1 000 mm × 50 mm × 2 mm),the hole spacing and the spoiler spacing are optimized,and the optimization effect is verified at inlet wind speed of 3 m/s.When the hole spacing and the spoiler spacing are constant,the heat exchange efficiency and air pressure loss decrease with the increase of the aperture at the same inlet wind speed,and the heat exchange efficiency and air pressure loss in-crease with the increase of inlet wind speed.When the aperture and the spoiler spacing are constant,the heat exchange efficiency and air pressure loss increase with the increase of the hole spacing at the same inlet wind speed,the heat exchange efficiency tends to be stable,and the heat exchange efficiency and air pressure loss increase with the increase of inlet wind speed at the same hole spacing.When the aperture,the hole spacing and the inlet wind speed are constant,the heat exchange efficiency and air pressure loss decrease with the increase of the spoiler spacing.The temperature field of heat collecting plate of solar wall before and after optimization is simulated and compared under thecondition of inlet wind speed of 3 m/s.Compared with after optimization,the temperature at the same position of the heat collector of solar wall before optimization is obviously higher,especially there are very high temperature zones in the heat collecting plates on both sides of the a

关 键 词：太阳墙 扰流板 结构优化 

分 类 号：TU832.2[建筑科学—供热、供燃气、通风及空调工程]