玻璃光伏面板在火灾场景中多层材料结构燃烧危险性的研究

Abstract At present, the application scale of glass panel photovoltaic modules worldwide is rapidly increasing, and they are widely used in centralized and distributed photovoltaic power plants. This article introduces the thermal hazards of glass panel photovoltaic modules in fire scenarios. Employing fire calorimetry , this study investigated how different levels of external thermal radiation influence the combustion properties of glass photovoltaic modules, while maintaining uniform air atmospheric conditions. Several key fire parameters relevant to firefighting have been closely examined, including ignition time, critical ignition temperature , heat release rate. Under certain assumptions, the heat transfer model based on a multi-layer polymer structure with Neumann boundary conditions is used to simulate the internal temperature field and can effectively predict the critical ignition temperature and critical ignition time. Experimental data show that an increase in radiative heat flux reduces the critical ignition temperature, significantly shortens the ignition time, and increases the total heat release. Photovoltaic modules conform to the characteristics of multi-layer heterogeneous polymer materials, and their heat release rate exhibits obvious multi peak characteristics. The experimental combustion heat, theoretical combustion heat, and standard fuel combustion heat are compared to determine their fire hazard. The main toxic gaseous emissions from combustion include carbon monoxide, carbon dioxide, sulfur dioxide, and hydrogen cyanide, with their instantaneous concentrations closely related to the external radiant heat flux.