The work described in this paper presents a set of experimental tests carried out in a Controlled Atmosphere Cone Calorimeter (CACC) in order to study the evaporation rate of a 250 ml-‘batch’ of n-heptane and methanol poured into an insulated 0.10 × 0.10 × 0.04 m³ steel pan and exposed to two ‘nominal’ irradiation levels of 25 and 50 kW/m². A low oxygen concentration is imposed during the CACC tests. The intent is to provide experimental data for the assessment and validation of the numerical modelling of liquid heat-up and evaporation in pool fires, without the need to model combustion and the subsequent associated complex phenomena. The analysis of the mass loss rate profiles shows that the evaporation rate of n-heptane increases with time due to the preheating of the liquid, whereas for methanol, a quasi-steady-state is reached. This is due to differences in specific heat, boiling point and latent heat of vaporization. Numerical simulations of the liquid phase using the Fire Dynamics Simulator (version 6.7.0) point out the importance to account for increased heat transfer due to the convective motion of the liquid by increasing the thermal conductivity of the liquid by 10–20 times. Other limitations and uncertainties in the modeling are also highlighted.

本文所述的工作提出了一组在受控大气层锥形量热仪（CACC）中进行的实验测试，目的是研究250 ml的正庚烷和甲醇批次注入绝缘的0.10×甲醇中的蒸发速率。 0.10×0.04 m ³钢锅，暴露在25和50 kW / m ^2的两个“名义”辐照水平下。在CACC测试期间施加了低的氧气浓度。目的是提供实验数据，用于评估和验证池火中液体加热和蒸发的数值模型，而无需对燃烧和随后的相关复杂现象进行建模。质量损失速率曲线的分析表明，正庚烷的蒸发速率由于液体的预热而随时间增加，而对于甲醇，达到准稳态。这是由于比热，沸点和汽化潜热的不同所致。使用Fire Dynamics Simulator（6.7版）对液相进行数值模拟。0）指出了通过将液体的热导率提高10–20倍来解决由于液体的对流运动而增加的热传递的重要性。还强调了建模中的其他限制和不确定性。