Abstract Biomass cookstoves have been studied extensively for several decades. The Water Boiling Test (WBT) has been a widely adopted protocol for obtaining measurements needed to quantify biomass cookstove performance metrics. WBT metrics have been commonly used to evaluate cookstove effectiveness and serve as a basis for comparing biomass cookstoves. This paper demonstrates the influence of variations in testing parameters on measured or calculated metrics, especially since changes in multiple testing parameters may have competing effects on a given metric. In controlled experiments, this study assessed the effects of variations in the presence or absence of a pot lid, firepower, pot size, the initial mass of water, and presence or absence of boiling on the performance metrics of overall thermal efficiency (η), thermal efficiency associated with heating water (ηheat), specific consumption (SC), and the time to reach 90 °C. η was not greatly affected by variations in any of the testing parameters (i.e. no effect was greater than 6% of the base case). SC and ηheat, which are interrelated metrics, can provide additional insights on cookstove efficiency. Although these latter metrics showed a wide range of values due to variations in testing parameters, the use of a lid greatly reduced variations in both ηheat and SC metrics even when there were significant variations in the other testing parameters. Thus, the use of a lid would provide better consistency for cookstove comparisons when using these metrics. The time to reach 90 °C varied widely among changes in testing parameters. Therefore, this metric is difficult to use for cookstove comparison without strict control of testing protocols.

中文翻译：

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基于水沸腾测试的测试参数变化对炉灶性能指标的影响

摘要 生物质炉灶已被广泛研究了几十年。水沸腾测试 (WBT) 已被广泛采用，用于获得量化生物质炉灶性能指标所需的测量值。WBT 指标通常用于评估炉灶效率，并作为比较生物质炉灶的基础。本文展示了测试参数变化对测量或计算指标的影响，特别是因为多个测试参数的变化可能会对给定的指标产生竞争影响。在对照实验中，本研究评估了锅盖存在与否、火力、锅尺寸、初始水量以及沸腾存在与否对整体热效率 (η) 性能指标的影响，与加热水 (ηheat)、单位消耗量 (SC) 和达到 90 °C 的时间相关的热效率。η 不受任何测试参数变化的很大影响（即没有影响大于基本情况的 6%）。SC 和 ηheat 是相互关联的指标，可以提供有关炉灶效率的更多见解。尽管由于测试参数的变化，这些后面的指标显示出广泛的值，但即使在其他测试参数存在显着变化时，使用盖子也大大减少了 ηheat 和 SC 指标的变化。因此，在使用这些指标时，使用盖子将为炉灶比较提供更好的一致性。达到 90 °C 的时间因测试参数的变化而异。所以，