Abstract Over the years, a significant need has been established to develop stove testing protocols that reflect the performance of fuel/stove combinations in the field better. This is particularly true for alcohol-based liquid fuels, widely seen as a future replacement for kerosene fuels in the informal and less affluent communities of South Africa. This paper aimed to evaluate three liquid-fuelled stoves using cooking sequences derived from a typical township in Johannesburg, South Africa based on a contextual testing approach, which is a revised in-situ testing protocol based on the Uncontrolled Cooking Test (UCT). The devices were evaluated and rated based on their intended contexts-of-use in South Africa using the new contextual testing protocol, which was combined with the old Heterogeneous Stove Testing Protocol (HTP). Overall, results showed that there are no significant differences (p > 0,05; α = 0,05) between the averaged cooking sequences and the uncontrolled cooking task of individual methanol stoves regarding energetic and emissions characteristics. Although the Dometic and the Meca stoves were designed for ethanol, they performed well with methanol fuel delivering adequate cooking power (at least 1 kW into the pot) and fewer CO and PM emissions. Results show that a laboratory test sequence with the same power levels for cooking food or for heating water produced nearly the same results as a UCT of a typical meal in the Township.

中文翻译：

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使用上下文测试方法评估三个甲醇炉的性能

摘要 多年来，迫切需要开发能更好地反映现场燃料/炉灶组合性能的炉灶测试协议。酒精基液体燃料尤其如此，在南非的非正式和不太富裕的社区中，人们普遍认为它是未来煤油燃料的替代品。本文旨在基于上下文测试方法，使用源自南非约翰内斯堡典型城镇的烹饪序列评估三个液体燃料炉灶，该方法是基于非受控烹饪测试 (UCT) 的修订原位测试协议。这些设备使用新的上下文测试协议根据它们在南非的预期使用环境进行评估和评级，该协议与旧的异构炉测试协议 (HTP) 相结合。全面的，结果表明，平均烹饪顺序与单个甲醇炉的不受控制的烹饪任务在能量和排放特征方面没有显着差异（p > 0.05；α = 0.05）。尽管 Dometic 和 Meca 炉灶是为乙醇设计的，但它们在使用甲醇燃料时表现良好，可提供足够的烹饪功率（至少 1 kW 到锅中）和更少的 CO 和 PM 排放。结果表明，具有相同功率水平的用于烹饪食物或加热水的实验室测试序列与乡镇典型膳食的 UCT 产生的结果几乎相同。尽管 Dometic 和 Meca 炉灶是为乙醇设计的，但它们在使用甲醇燃料时表现良好，可提供足够的烹饪功率（至少 1 kW 到锅中）和更少的 CO 和 PM 排放。结果表明，具有相同功率水平的用于烹饪食物或加热水的实验室测试序列与乡镇典型膳食的 UCT 产生的结果几乎相同。尽管 Dometic 和 Meca 炉灶是为乙醇设计的，但它们在使用甲醇燃料时表现良好，可提供足够的烹饪功率（至少 1 kW 到锅中）和更少的 CO 和 PM 排放。结果表明，具有相同功率水平的用于烹饪食物或加热水的实验室测试序列与乡镇典型膳食的 UCT 产生的结果几乎相同。