针对建筑物制冷系统人为热排放对城市气候和能源消耗影响越来越大的现状,利用改进后的建筑物能量模式BEM(Building Energy Model)与单层城市冠层模式SLUCM(Single Layer Urban Canopy Model)的耦合,实现对城市建筑物人为热排放的动态模拟;以2014年5月29日为例(北京地区极端高温个例),开展北京地区建筑物制冷系统人为热排放与城市气象环境相互作用的定量分析。WRF(Weather Research and Forecasting)/Noah/SLUCM/BEM耦合模式模拟分析表明,模式在不加入人为热时,对夜间的热岛模拟偏弱,且基本无法模拟出白天的热岛效应;加入城市交通人为热排放后,对城市热岛强度和范围的模拟有一定改善;进一步加入建筑人为热排放对气温、热通量、边界层高度等的模拟效果均有不同程度的改进。加入BEM模拟的人为热后(case2),15:00(北京时,下同)主城区地表感热通量增加30-50 W·m^-2,相应地2 m气温升高0.4-0.8℃,二者对应关系较好。case2中的人为潜热排放导致地表潜热通量增加80-140 W·m^-2,水汽通量增加0.04-0.09 g·m^-2·s-1,中心城区2 m比湿增加0.5-0.9 g·kg^-1,边界层高度升高100-150 m,且傍晚边界层高度开始下降的时间推迟了约1 h。加入建筑人为热后,气温等气象条件的变化会对建筑物制冷系统能耗及人为热排放产生影响。case2对比case1,建筑物制冷系统能耗增加了1.11%-3.33%,建筑物制冷系统排放的感热通量增大0.67%-1.67%、潜热通量增大0.625%-1.56%(达2.0 W·m^-2以上)。研究表明,在中尺度模式中动态模拟建筑物制冷系统的人为热排放,能够改进对近地层气象要素的模拟效果。
Since the accelerating of urbanization in China, in this paper the BEM ( building energy model) is improved and used to study the interaction of the anthropogenic heat release from cooling system and the urban me- teorological environment. Based on the case of May 29 to 30 in 2014 ( extreme high temperature case in the Bei- jing area in summer), this paper begin to quantitative analyze above interaction. The online WRF/Noah/ SLUCM/BEM results showed that, without the anthropogenic heat summer night heat island in Beijing urban areas has a deviation at night, and can hardly simulate summer heat island in the daytime. WRF model with anthro- pogenic heat can improve the extent and the intensity of urban heat island, which means the result can be more correct. The considering of building anthropogenic heat in WRF model would improve the simulation of temperature and specific humidity at 2 meters, upward sensible heat flux, latent flux and the upward moisture flux at the surface, and the urban boundary layer height. In case2 which adding BEM anthropogenic heat, the sensitive heat flux of downtown area increase by 30- 50 W · m-2, while the 2 meters temperature at relevant area rose about 0. 4 - 0. 6 ℃, which is almost the same. The latent release in case2 result that the latent heat flux near the surface, the moisture flux, and the specific humidity of downtown area increased nearly 80- 140 W · m-2, 0. 04 - 0.09 g· m-2s-1 , 0. 5 -0. 9 g · kg-1 respectively. In addition, the planetary boundary layer height rose about 100-150 m, and the time of beginning falling got later about 1 hour. The change of meteorological condition caused by the additional building anthropogenic heat made effect on the building anthropogenic heat too. Com- pared to casel, the consumption of energy for case2 increased 1. 11% -3.33%, the released heat from building can split into two part: sensitive heat flux and latent flux. The former increased 0. 67% - 1. 67%, the later increased 0. 625% - 1. 56% ( which can reach above 2. 0 W