The Analysis Of Heat Transfer In Thermal Bridge Of External Wall Corner In The Enclosure Of Multi-story Building

With the development of social economy, energy shortage gets serious increasingly, so energy-saving in buildings becomes more and more important. The reduction of energy consumption in buildings by taking effective measures is of great significance to sustainable development of building industry and the easement of urgent complexion of supply and demand in our country. At present, manifold preservation measures have been taken in building designs, but the energy loss from the thermal bridges due to heat preservation cannot be neglected. And our lives and health will be affected seriously if the thermal bridges were not be done with well. So the study of heat transfer in thermal bridges in buildings is very necessary.On the base of the research of energy-saving in buildings home and abroad, a lot of experiments on some typical structural thermal bridges of external wall corner of multi-story building in Harbin city were carried out. Moreover, based on computational dynamics software FLUENT, some steady and transient thermal process of those thermal bridges was also numerically simulated. According to the results of numerical simulation, the influence scope and internal surface temperature of every thermal bridge were analyzed in detail, and also better measures were put forward to decrease the influence of thermal bridge. With the comparative analysis of surface temperature of thermal bridges of external wall corner of typical structure, the internal surface temperature of thermal bridge with exterior preservation fluctuated slightly, and this situation was more beneficial to enhance people's comfortable feeling in room. The comparative research of the results from numerical simulation and energy efficiency inspection showed that it was practical and possible to study the thermal performance of wall corner by numerically simulating.