A new idea of building energy efficiency: The heat transfer coefficient changing with outdoor temperature wall

The building wall is the main interface of the interior and exterior of the building and is the main channel for the exchange of heat between the interior and exterior of the building. Therefore, reducing the wall energy consumption is one of the main methods to reduce the energy consumption of the building, in the traditional building. In the energy-saving design of the envelope structure, the wall heat transfer coefficient is considered as a fixed value. The constant wall heat transfer coefficient is not conducive to the timely use of outdoor air heat dissipation or heating in buildings in areas with relatively poor daily temperatures. In order to make better use of the outdoor air and to reduce the energy consumption of buildings. This research presents a new type of wall in view of the properties that traditional building structure material's heat transfer coefficient is relatively stable, which the heat transfer coefficient changing with outdoor temperature. The characteristic of the heat transfer coefficient changing with temperature outdoor wall is the use of the natural cold/heat energy to adjust its heat transfer coefficient, at the same time it reduces indoor heating/cooling energy consumption and saves energy. This paper studies the principle and performance about regulating the heat transfer coefficient of the heat transfer coefficient changing with outdoor temperature wall and verifies the energy saving effect and automatic adjustment characteristic of the heat transfer coefficient by experimental analysis and theoretical calculation of this wall.