Interlaboratory Proficiency Test 07/2020. Gross and net calorific values in fuels

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Title: Interlaboratory Proficiency Test 07/2020. Gross and net calorific values in fuels
Author: Leivuori, Mirja; Hatanpää, Eliisa; Koivikko, Riitta; Tervonen, Keijo; Lanteri, Sari; Ilmakunnas, Markku
Publisher: Finnish Environment Institute
Date: 2020
Belongs to series: Reports of the Finnish Environment Institute 46/2020
ISBN: 978-952-11-5338-9
ISSN: 1796-1718
URI: http://urn.fi/URN:ISBN:978-952-11-5338-9
http://hdl.handle.net/10138/322340
Abstract: Proftest SYKE arranged the proficiency test (PT) for the measurements of the gross and net calorific value, the content of ash, carbon, nitrogen, hydrogen, moisture, sulphur, and volatile matter in peat, wood pellet (not sulphur) and coal samples in September 2020. In total, there were 31 participants in the PT. The participants could also estimate the emission factor for the peat and coal samples. The robust mean or the median of the results reported by the participants was used as the assigned value for measurements. The performance evaluation was based on the z scores. In total, 89 % of the reported results were satisfactory, when the deviation of 1–30 % from the assigned value was accepted. For the gross calorific value measurements 79 % of the peat sample results, 80 % of the wood pellet sample results, and 90 % of the coal sample results were satisfactory. For the net calorific value measurements 83 % of the peat sample results, 76 % of the wood pellet results, and 82 % of the coal sample results were satisfactory. The performance evaluation was not done for the measurements of Mad in all samples, Nd in the wood pellet sample, and emission factor in peat sample.


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