Interlaboratory Proficiency Test 07/2018 - Gross and net calorific values in fuels

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Title: Interlaboratory Proficiency Test 07/2018 - Gross and net calorific values in fuels
Author: Leivuori, Mirja; Rantanen, Minna; Hatanpää, Eliisa; Koivikko, Riitta; Tervonen, Keijo; Lanteri, Sari; Ilmakunnas, Markku
Belongs to series: Reports of the Finnish Environment Institute 28/2018
ISSN: 1796-1726
ISBN: 978-952-11-4976-4
Abstract: Proftest SYKE arranged the proficiency test (PT) for measurement the gross and the 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 2018. In total, there were 26 participants in the PT. The participants could also calculate the emission factor for the peat and coal samples. The robust mean, median or mean of the reported results by the participants was used as the assigned value for measurements. The evaluation of performance was based on the z and En scores. In total, 89 % of the reported results were satisfactory based on z scores when the deviations of 1–30 % from the assigned values were accepted. In measurement of the gross calorific value from the peat sample 92 %, from the wood pellet sample 83 % and from the coal sample 88 % of the results were satisfactory. In measurement of the net calorific value from the peat sample 82 %, from the wood pellet 73 % and from the coal sample 79 % of the results were satisfactory. All results evaluated based on En scores were satisfactory. The evaluation of performance was not done for the measurement of Mad in all samples and Nd in the wood pellet sample. Warm thanks to all the participants of this proficiency test!
URI: http://hdl.handle.net/10138/269777
Date: 2018-12-03


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