Study on Thermal Performance of Single-layer and Multi-layer Stone Aluminum Honeycomb Composite Panels

Abstract

The stone aluminum honeycomb composite panel is light in weight and large in ductility. It is a sustainable building thermal insulation material. It can be used as an insulation wall for ordinary buildings and prefabricated buildings, so that the exterior walls of the building can be light, high-strength and heat-insulated. However, the current application of stone aluminum honeycomb composite panels is still rare in practice, because the reasonable core size and number of layers with the best structural optimization, the least heat transfer, and the strongest applicability are difficult to determine. In this paper, the three basic heat transfer mechanisms of heat conduction, thermal convection and heat radiation of stone aluminum honeycomb composite panel structure are systematically analyzed. Under the premise of convective heat transfer of gas in honeycomb core cavity, the surface radiation exchange of honeycomb core cavity is established. The heat and the heat transfer of the cavity and the air in the cavity play a leading role in the heat transfer mechanism. The effects of parameters such as honeycomb core layer, core size, core height and core wall thickness on heat transfer performance under steady-state heat transfer conditions were studied by experimental methods. Stone aluminum honeycomb composite panels were tested under different temperature conditions. The equivalent thermal conductivity of the structure. Based on the ANSYS finite element analysis software, based on the experiment, the fluid-solid coupling heat transfer model of stone aluminum honeycomb composite board was established to simulate the steady-state heat transfer performance of composite sheets under single-layer and multi-layer honeycomb core materials, and to study the core body. The variation of the effective thermal conductivity under different boundary conditions and different geometric parameters, the simulation results are basically consistent with the experimental results, and the results of the empirical formula are also consistent. The results show that under the condition of satisfying the feasibility of the construction process within the fixed height, the height of the honeycomb core layer, the size of the core, and the height of the core can be appropriately reduced to reduce the thermal conductivity.