摘要
准确计算空调负荷是进行地下建筑通风空调系统设计的重要环节,空气和岩壁的对流换热属于第四类边界条件,传统编程计算十分复杂。本文使用Fluent软件对洞室岩壁的非稳态传热进行了计算。根据实例计算得出:间歇通风条件下岩壁热流通量达到稳定所需的时间约为1个月,并比较了不同风速和不同岩体材料时,洞室壁温和室温随时间的变化状况,为深埋地下洞室岩壁的热负荷计算提供了参考。
Precise computation of cooling load is important for air-conditioning system design. Heat transfer between air and rock wall belongs to the forth boundary condition, and conventional computation programs are always complicated to use. In this paper, using the software of Fluent, unsteady heat transfer of cavity wall was calculated. Based on the example, it was observed that the wall-flux was steady after one month under intermittent ventilation condition. In addition, the characteristics of wall temperature and temperature variation trend under the conditions of different wind speeds and rock materials were analyzed. The results could be useful for the computation of heating load of cavity wall in deeply buried building.
出处
《建筑科学》
北大核心
2007年第6期37-40,共4页
Building Science
关键词
地下建筑
耦合传热
间歇机制
内热源
underground building
coupled heat transfer
intermittent mechanism
internal heat source
