具有强热源的工业建筑中局部工位微环境调控机理研究

Local ventilation is energy saving. The air supply system is a suitable way to control the micro-environment of local workplace with in large industrial buildings because of the enhancement of the work environment and the decrease of energy consumption. Intensive heat sources are often existed in the industrial buildings. The features of the flow pattern caused by the forced convection by the local ventilation and the free convection by the human body and the heat source are not clear, thus the applications are limited. In this study a physical and mathematical model of local ventilation system with typical heat source is determined. The features of the heat and mass transfer are analyzed. Field synergy equation of the local ventilation system is established, and obtaines the strengthening and weakening mechanism of heat and mass transfer. Heat and mass transfer is optimized in the mixted convection. The final objective of the current project is to provide certain theoretical basis for the local micro-environment control, and provide the foundation and support for the application of the local air supply system.

局部通风是一种节能的通风方式，对于高大工业建筑，尤为适宜采用局部送风方式对工人工作区进行重点控制，可以有效改善工人作业环境、降低能耗。在工业建筑中，经常存在高强度热源，由热源引起的自然对流、人的热羽流以及局部送风强迫对流耦合作用下的气流规律特性尚不明晰，限制了局部送风系统在工业建筑中的应用。本研究拟建立工业建筑中具有典型热源的局部通风系统的物理数学模型，获得局部送风强迫对流、人体热羽流和热源自然对流耦合作用下的混合对流的流动规律及其传热传质特性；建立局部微环境的场协同方程，获得传热传质强化与弱化的机理，得到匹配的速度场、温度场和浓度场，寻求实现最优匹配的边界条件，指导局部送风参数和末端装置结构的优化；为局部微环境控制提供一定的理论基础，为局部送风系统在工业建筑中的应用提供参考依据。