ABSTRACT
For most industrial heating applications, heat ux is one of the most important parameters in the system design [1]. The heat ux distribution in many furnaces is not uniform because of the combustion chamber geometry or asymmetrical ring of the burners [2]. The temperatures are generally over 1000°C (1800°F), which means that radiation is often an important if not dominant mode of heat transfer. The various types of fuels may impact the heat ux in the furnace. For example, the combustion of H2 produces very little gaseous radiation, while the combustion of oil or coal produces high levels of ame radiation due to soot formation. This means that in petrochemical applications where the fuel composition is usually highly variable, ame radiation may also be highly variable [3]. Some industrial applications, such as regeneratively red glass furnaces, are highly transient in nature, which impacts the temporal heat ux in the
furnace. While many analytical and numerical models are available to predict heat ux, actual measurements are needed to validate those predictions. Measuring the heat ux in an industrial combustion process is both important and necessary.
