The radiant heat flux from a pool fire is frequently calculated using the solid flame model, where the flame envelope is approximated as a stationary cylinder whose surface emits thermal radiation at a constant rate. Radiant heat flux calculations using the solid flame model assume the target to be at a given elevation, typically at ground level, and to have an unobstructed view of the fire. The presence of obstacles (e.g., walls, buildings, etc.) or terrain features that would create shaded areas and provide shielding of a target from the fire is typically neglected in these calculations: this is a conservative approach, but it is not accurate. This paper presents a methodology to utilize the solid flame model to calculate the heat flux to a target while taking into account the presence of an obstruction between the target and the fire. The shielded solid flame method can quantitatively account for the presence of obstacles as a passive mitigation measure and allows project developers or designers to optimize their facility layout to meet safety requirements. The methodology presented in this paper uses the same correlations found in currently used solid flame models (e.g., LNGFIRE3), therefore, it remains consistent with current regulatory requirements for LNG facilities in the U.S.

池火的辐射热通量经常使用固体火焰模型进行计算，其中火焰包络被近似为一个静止的圆柱体，其表面以恒定速率发射热辐射。使用固体火焰模型的辐射热通量计算假设目标处于给定的高度，通常在地平面，并且可以无障碍地观察火情。在这些计算中，通常会忽略障碍物（例如，墙壁、建筑物等）或地形特征的存在，这些特征会产生阴影区域并为目标提供防火保护：这是一种保守的方法，但并不准确。本文提出了一种方法，利用固体火焰模型计算到达目标的热通量，同时考虑到目标和火之间存在障碍物。屏蔽固体火焰法可以定量地说明障碍物的存在，作为一种被动缓解措施，并允许项目开发商或设计人员优化其设施布局以满足安全要求。本文中介绍的方法使用在当前使用的固体火焰模型（例如 LNGFIRE3）中发现的相同相关性，因此，它与美国 LNG 设施的当前监管要求保持一致