翼型导流板对风机盘管进风均匀性改进的研究
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摘要
采用翼型导流板对某三代核电机组安全壳冷却机组风机盘管进风均匀性的改善进行了研究。提出了在盘管迎风面安装与竖直方向成一定夹角导流板的改进方案,采用数值模拟的方法分析其流场,依据GB/T14294-2008定量分析了改进方案对盘管迎风面进风均匀性的改善,筛选出了满足国标要求的改进方案。对筛选出的改进方案在原风机盘管上进行了实施,并对改进方案实施后风机盘管的迎风面进风均匀性进行了测量和定量分析。研究结果表明:在风机盘管迎风面安装与竖直方向有一定夹角的导流板可以提高风机盘管迎风面上的断面风速均匀度对于文中的研究对象,在风机盘管迎风侧安装与竖直方向30°夹角的导流板后,风机盘管迎风面上的断面风速均匀度为86%,满足国标要求。
The airfoil guide plate was used to improve the air inlet uniformity of the fan coil unit of the containment shell for a third generation nuclear power unit. An improved scheme,in which the guide plate with a certain angle to the vertical direction was installed on the windward face of the fan coil,was proposed. The flow field of the fan coil with airfoil guide plate was numerically simulated. The improvement of the air inlet uniformity on the windward face of the fan coil was quantitatively analyzed according to the national standard GB/T14294-2008,and an improved scheme,which meets the requirements of the national standard,was screened. The screened improvement scheme was carried out on the original fan coil. After the implementation of the improved scheme, the air inlet uniformity of the windward face of the fan coil was measured and quantitatively analyzed again. The research results show that installing a guide plate with a certain angle to the vertical direction on the windward face of the fan coil could improve the "sectional wind velocity uniformity" on the windward face. For the research object,after installing the guide plate with 30° angle to the vertical direction,the "sectional wind velocity uniformity" on the windward face of the fan coil was 86%,which meets the requirements of the national standard.
The airfoil guide plate was used to improve the air inlet uniformity of the fan coil unit of the containment shell for a third generation nuclear power unit. An improved scheme,in which the guide plate with a certain angle to the vertical direction was installed on the windward face of the fan coil,was proposed. The flow field of the fan coil with airfoil guide plate was numerically simulated. The improvement of the air inlet uniformity on the windward face of the fan coil was quantitatively analyzed according to the national standard GB/T14294-2008,and an improved scheme,which meets the requirements of the national standard,was screened. The screened improvement scheme was carried out on the original fan coil. After the implementation of the improved scheme, the air inlet uniformity of the windward face of the fan coil was measured and quantitatively analyzed again. The research results show that installing a guide plate with a certain angle to the vertical direction on the windward face of the fan coil could improve the "sectional wind velocity uniformity" on the windward face. For the research object,after installing the guide plate with 30° angle to the vertical direction,the "sectional wind velocity uniformity" on the windward face of the fan coil was 86%,which meets the requirements of the national standard.
引文
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[2]于志敏.国产风机盘管机组现状和性能研究分析[J].机械工程师,2001(3):43-44.
[3]Fangan T J.The effects of air flow maldistribution on air-to-refrigerant heat exchanger performance[J].ASHRAE Transaction,1980,86(2):699-713.
[4]Domanski P A.Simulation of an evaporator with nonuniform one dimensional air distribution[J].ASHRAE Transactions,1991,97(1):793-802.
[5]Bensafi A,Borgand S,Parent D.A computational model for the detailed design of plate-fine-and-tube heat exchangers using pure and mixed refrigerants[J].International Journal of Refrigeration,1997,20(3):218-228.
[6]柳成文,王冬青,龚建英.风速分布不均匀性对空气源热泵风侧换热器性能的影响[J].制冷与空调,2008(3):87-90.
[7]Chwalowski M,Didion DA,Domanski PA.Verification of evaporator computer models and analysis of performance of an evaporator coil[J].ASHRAETrans,1989,23(1):1229-1236.
[8]Abu Madi M,Johns R A,Heikal M R.Performance characteristics correlation for round tube and plate finned heat exchangers[J].Int J Refrig,1998,21(7):507-517.
[9]邓斌,陶文铨,余汪洋.来流不均匀性对冷凝器性能影响的数值研究[J].制冷与空调(四川),2007(3):1-6.
[10]周涛,李精精,汝小龙,等.核电机组非能动技术的应用及其发展[J].中国电机工程学报,2013,33(8):81-89.
[11]崔国强,张莉,肖伯乐,等.安全壳冷却机组风机盘管进风均匀性的定量研究[J].核动力工程,2018,39(3):114-118.
[12]组合式空调机组:GB/T 14294-2008[S].
[13]程友良,丁丽瑗,胡宏宽.风机出口加装导流板对空冷单元的影响[J].动力工程学报,2014,34(7):551-555.
[14]冯民权,范术芳,郑邦民,等.风机盘管来流场均匀化数值模拟[J].流体机械,2013,41(4):54-57.
[15]张卫星,高焕西.大风量空调箱内空气均流的数值模拟研究[J].顺德职业技术学院学报,2008,6(2):18-20.
[16]陶文铨.数值传热学:第二版[M].西安:西安交通大学出版社,2001.
[17]王福军.计算流体力学分析-CFD软件原理与应用[M].北京:清华大学出版社,2004.