Interlaboratory Proficiency Test 08/2016 - Gross and net calorific values in fuels

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Title: Interlaboratory Proficiency Test 08/2016 - Gross and net calorific values in fuels
Author: Leivuori, Mirja; Rantanen, Minna; Koivikko, Riitta; Tervonen, Keijo; Lanteri, Sari; Ilmakunnas, Markku
Publisher: Finnish Environment Institute
Date: 2016
Belongs to series: Reports of the Finnish Environment Institute 45/2016
ISBN: 978-952-11-4654-1
ISSN: 1796-1726
URI: http://hdl.handle.net/10138/170327
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 2016. In total, there were 28 participants in the PT. Additionally, the participants were asked to estimate/calculate the emission factor for the peat and coal samples. In total, 90 % of the participants reported satisfactory results when the deviations of 1-30 % from the assigned values were accepted. In measurement of the gross calorific value from the peat sample 93 %, from the wood pellet sample 86 % and from the coal sample 84 % of the results were satisfactory. In measurement of the net calorific value from the peat sample 82 %, from the wood pellet 75 % and from the coal sample 85 % of the results were satisfactory. The robust mean or mean of the reported results by the participants were used as the assigned values for measurements. The evaluation of performance was based on the z score which was calculated using the assigned value and the standard deviation for proficiency assessment at 95 % confidence level. The evaluation of performance was not done for the measurement of moisture in all samples, emission factor in peat samples and nitrogen in wood pellet samples. Warm thanks to all the participants of this proficiency test!
Subject: pätevyyskoe
Subject (ysa): laboratoriot
laboratoriotutkimus
pätevyys
luotettavuus
lämpöarvo
polttoaineet


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