Abstract Moisture content (MC) is the most important quality parameter for energy wood. Unfortunately, checking MC under operational conditions is difficult, because the standard method for MC measurement requires up to 48 h. The bioenergy industry needs alternative methods allowing fast and reliable MC determination, but most of the commercial devices require biomass-specific calibration models. This is an important limitation, particularly in Mediterranean areas, where mixed forest dominate and feedstock loads can include multiple species. In this study a moisture meters based on Magnetic Resonance (MR) was tested for assessing its reliability as an alternative to oven drying. For this purpose, a stress-test was performed at the premises of an energy facility in Southern Italy, using a commercial MR analyzer. Thanks to the non-destructive action on the biomass of MR technology, the MC of 350 samples was measured with both MR and standard gravimetric techniques. Results confirm the validity of the MR analyzer as an alternative to oven drying. Accuracy and precision of the machine are both satisfactory, with over 95% of values within ±2.5% of deviation and a Standard Error of Performance of 1.2%. Furthermore, the analyzer processes over 15 samples per hour, coping with frequent deliveries.

中文翻译：

---

南欧条件下木质生物质磁共振水分仪的工业压力测试

摘要 水分含量（MC）是能源木材最重要的质量参数。不幸的是，在操作条件下检查 MC 很困难，因为 MC 测量的标准方法需要长达 48 小时。生物能源行业需要能够快速可靠地测定 MC 的替代方法，但大多数商业设备需要特定于生物质的校准模型。这是一个重要的限制，特别是在地中海地区，混合森林占主导地位，原料负荷可能包括多种物种。在这项研究中，测试了基于磁共振 (MR) 的水分计，以评估其作为烘箱干燥替代方案的可靠性。为此，使用商用 MR 分析仪在意大利南部的一家能源设施内进行了压力测试。由于 MR 技术对生物量的无损作用，350 个样品的 MC 用 MR 和标准重量技术测量。结果证实了 MR 分析仪作为烘箱干燥替代品的有效性。机器的准确度和精密度都令人满意，95%以上的值在±2.5%的偏差范围内，性能标准误差为1.2%。此外，该分析仪每小时可处理超过 15 个样品，应对频繁交付的情况。