ABSTRACT Anthropogenic activities in the environment have an impact on climate change. Among these activities is the use of the chainsaw which plays an important role by releasing greenhouse gas emissions in the atmosphere. Hence, the need for research on improved logging operations is of importance. The present study compares carbon monoxide (CΟ) and nitrogen dioxide (NO2) emissions generated by the engines of one catalytic chainsaw and two conventional chainsaws, of which one is professional and the other amateur. Measurements were carried out under three functional modes (infrequent accelerator use, use of quality oils, use of clean filters). Measurements that were conducted under normal conditions were named “witness measurements” and were used for future comparisons. Additionally, a set of measurements for CΟ and ΝΟ2 emissions was collected under different operation modes for all three types of saws (frequent accelerator use, use of low-quality oils, use of impure filters). Data collection was carried out in real conditions using a portable gas detector. Average concentration values of CΟ and ΝΟ2 under normal conditions for all three types of chainsaws found in the air of the operator’s breathing zone were 88.32 ppm and 0.07 ppm, respectively. Results show that CO concentrations exceed the permissible exposure limit (50 ppm), whereas CO concentrations in excess of the short-term exposure limit (300 ppm) were only found in the case of the amateur chainsaw operated with low-quality oils. These results are of use towards efforts to reduce the CO and NO2 to the atmosphere.

中文翻译：

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基于便携式排放测量系统的链锯尾气排放研究

摘要 环境中的人为活动对气候变化有影响。在这些活动中，电锯的使用在释放大气中的温室气体排放方面发挥着重要作用。因此，对改进测井作业的研究非常重要。本研究比较了一台催化链锯和两台传统链锯的发动机产生的一氧化碳 (CO) 和二氧化氮 (NO2) 排放，其中一台是专业的，另一台是业余的。测量在三种功能模式下进行（不经常使用加速器、使用优质油、使用清洁过滤器）。在正常条件下进行的测量被称为“见证测量”，用于未来的比较。此外，在所有三种类型的锯（频繁使用加速器、使用劣质油、使用不纯的过滤器）的不同操作模式下收集了一组 CO 和 ΝΟ2 排放测量值。使用便携式气体检测器在真实条件下进行数据收集。在正常条件下，在操作员呼吸区空气中发现的所有三种类型的链锯的 CO 和 ΝΟ 2 的平均浓度值分别为 88.32 ppm 和 0.07 ppm。结果表明，一氧化碳浓度超过了允许的接触限值 (50 ppm)，而一氧化碳浓度超过短期接触限值 (300 ppm) 的情况仅在使用劣质油的业余链锯中发现。这些结果有助于减少大气中的 CO 和 NO2。