摘要
对开阔无遮挡环境下2×13阵列进行不同架高高度的三维仿真,分析不同架高高度对阵列冷岛效应的影响。结果表明,架高高度的增大对冷岛效应的削弱体现在提高阵列机组进风温度及其均匀度,同时也减弱阵列各处的冷风回流。当x方向无风时,阵列每提高0.5 m,机组进风均温提升0.14~0.18 K,机组回流率均值平均减小0.018。x方向风速为0.5 m/s时,阵列每提高0.5 m,每排机组进风均温最大提高0.52 K,进风均温方差平均减小38%,进风温度均匀性大幅提高;回流率均值差异随架高高度递进而减小,最小为0.21,最大0.42。x方向风速为2.0 m/s时,阵列每增高0.5 m,进风均温平均提高0.16 K,架高2.5 m阵列较无架高阵列进风均温平均提0.75 K,最大提高1.1 K。
This study investigates the influence of different array heights on the cold island effect in unobstructed open environments through three-dimensional simulations of a 2×13 array.The results demonstrate that increasing the array height effectively mitigates the cold island effect by enhancing the inlet air temperature and its uniformity while reducing cold air reflux throughout the array.In windless conditions,each 0.5 m increase in array height leads to an average elevation of 0.14-0.18 K in the unit’s average inlet air temperature,coupled with an average reduction in the return rate by 0.018.At a wind speed of 0.5 m/s in the x direction,augmenting the array height by 0.5 m yields a maximum increment of 0.52 K in the average inlet air temperature across each row,accompanied by a 38%average decrease in the variance of the inlet air temperature and significant enhancement in temperature uniformity.The mean difference in reflux rates diminishes with increasing height,ranging from 0.21 to 0.42.Moreover,at a wind speed of 2 m/s in the xdirection,each 0.5 m increase in array height corresponds to an average rise of 0.16 K in the average inlet air temperature.Notably,for an array height of 2.5 m,the average inlet air temperature increases by 0.75 K on average,with a maximum surge of 1.1 K compared to an array without additional height.
作者
姜华
罗贤锐
宫武旗
Jiang Hua;Luo Xianrui;Gong Wuqi(School of Energy,Xi’an University of Science and Technology,Xi’an 710054,China;School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China)
出处
《太阳能学报》
北大核心
2025年第2期309-316,共8页
Acta Energiae Solaris Sinica
基金
国家科技重大专项(2017-V-0012-0064)。
关键词
空气源热泵
数值模拟
环境温度
冷岛效应
寒冷地区
air source heat pump
numerical simulation
ambient temperature
cold island effect
cold area
作者简介
通信作者:姜华(1973-),女,博士、副教授,主要从事热泵系统及设备方面的研究。jianghua10@xust.edu.cn。
