特朗贝墙体冬季热性能的CFD模拟研究  

CFD Analysis Study of Thermal Performance of Trombe Wall in Winter Heat Collection Period

作　　者：黑赏罡 姜曙光[1] 杨骏[1] 张俊龙[1] HEI Shanggang;JIANG Shuguang;YANG Jun;ZHANG Junlong(College of Water Conservancy ＆ Architectural Engineering, Shihezi University, Shihezi 832003, Xinjiang , Chin)

机构地区：[1]石河子大学水利建筑工程学院,新疆石河子832003

出　　处：《建筑科学》2018年第6期7-14,共8页Building Science

基　　金：新疆建设兵团重大科技项目课题1"绿色装配式钢结构建筑方案优化与节能技术集成应用"(2016AA00601)

摘　　要：本文建立了带有特朗贝墙体的被动式太阳能房的传热模型,对带有特朗贝墙体房间分别进行了稳态、瞬态模拟。稳态模拟可知:温度和密度的等值线分布均匀对称,热空气向上在出风口附近密度分布呈涡旋状;出风口中心点温度为316.04 K,墙面上最高温度为325.38 K,两者相差9.34 K。瞬态模拟可知:系统运行5 h时,墙体外表面温度由7.2℃迅速增加至46℃,墙体内表面温度由4.1℃增加至11.3℃。系统运行10 h时,墙体外表面由46℃迅速降至20.3℃后缓慢下降;墙体内表面温度由11.3℃缓慢降至7.1℃后基本趋于稳定。结果表明,地理位置和墙体热惰性对特朗贝墙体的蓄热传热过程影响较大。该传热模型为进一步优化设计带有特朗贝墙体的被动式太阳能房提供理论依据。Objectives of this study were（ i） to use computational fluid dynamics to establish a numerical heat transfer model of a passive house with a Trombe wall,and（ ii） to conduct steady and transient simulations of the passive house with a Trombe wall. Results of the steady state simulation indicated that temperature and air density were both symmetrically distributed around the wall. Heated air flowed toward the top center of the wall where it was blocked by the roof. Such forced air flowed toward both sides of the wall,resulting in a vortex-like distribution of air density. The temperature at the center point of the outlet was 316. 04 K and the highest temperature on the wall was 325. 38 K,indicating a difference of 9. 34 K. Results of the transient simulation showed that when the system ran for 5 h,the external surface temperature of the wall would increase rapidly from 7. 2 ℃ to 46 ℃ and the internal surface temperature of the wall would increase from 4. 1 ℃ to 11. 3 ℃. When the system ran for 10 h,the external surface of the wall would decline rapidly at first（ from 46 ℃ to 20. 3 ℃） before getting stable afterward.The internal surface temperature of the wall declined from 11. 3 ℃ to 7. 1 ℃,implying that the location and thermal inertia of the Trombe wall could greatly influence the heat transfer process. The heat transfer model provided a theoretical basis for further optimization of the design of a passive house with a Trombe wall.

关 键 词：特朗贝墙 热性能 CFD模拟 热传递 优化设计 

分 类 号：TU119[建筑科学—建筑理论]