Improved solid radiation model for thermal response in large crude oil tanks

In a crude oil tank farm, a fire in a large crude oil storage tank can spread to its neighbouring tanks due to thermal radiation causing wall rupture. To better understand the thermal radiation of tank fires and the thermal response of their neighbouring tanks, a semi-empirical radiation model is proposed in this paper. The model takes into account the smoke generation and its effect in reducing thermal radiation, as well as the variation of flame temperature and emissivity along the flame axis. Compared with existing models, the model is able to predict the radiant heat flux of the flame more accurately, and this advantage becomes more pronounced as the diameter of the pool fire increases.Using the improved model, the effect of different crude oil contents on the thermal response and failure time of the storage tank under the action of thermal radiation was innovatively explored by numerical simulation. An in-depth analysis of the failure time was performed, and an empirical equation was derived to provide a reference for fire emergency management of large storage tanks.

Automated summary

A semi-empirical radiation model is proposed in this paper to investigate the thermal radiation of tank fires and the thermal response of neighbouring tanks. The model considers smoke generation and its impact on reducing thermal radiation, as well as the variation of flame temperature and emissivity along the flame axis. Compared to existing models, the model accurately predicts the radiant heat flux of the flame, particularly for larger diameter pool fires. The improved model is used to explore the innovative effects of different crude oil contents on the thermal response and failure time of storage tanks under thermal radiation through numerical simulation. An in-depth analysis of the failure time is performed, and an empirical equation is derived as a reference for fire emergency management of large storage tanks.