Title: Analysis on influential factors of loose coal thermal conductivity test accuracy

Authors: Weijuan Guan; Qinghua Chen; Manman Xu; Guoshu Zhang; Ming Deng

Addresses: Faculty of Science, Anhui University of Science and Technology, No. 168 Shungeng road, Huainan City, Anhui Province 232001, China ' Faculty of Mechanical Engineering, Anhui University of Science and Technology, No. 168 Shungeng road, Huainan City, Anhui Province 232001, China ' Faculty of Mechanical Engineering, Anhui University of Science and Technology, No. 168 Shungeng road, Huainan City, Anhui Province 232001, China ' Faculty of Energy and Safety, Anhui University of Science and Technology, No. 168 Shungeng road, Huainan City, Anhui Province 232001, China ' Faculty of Computer & Information, Fuyang Normal College, No. 100 Qinghe road, Fuyang City, Anhui Province 236041, China

Abstract: According to the status that the improved measurement system of loose coal thermal conductivity had more device error sources, which were not conducive to ensured test accuracy, the influence of system hardware error, coal sample self-oxidation exothermic, data processing error and other factors on test accuracy of the thermal conductivity were comprehensively analysed, and then corresponding control measures were raised. The experimental results showed that the system hardware error could be controlled effectively by selecting high-quality test component and controlling heating component size, and the coal self-oxidation exothermic impact can be negligible. The improved measurement system reduced simplified degree of the mathematical model, and solved it through numerical solution, through which can eliminated influence of data processing error effectively.

Keywords: loose coal; thermal conductivity; test accuracy; control measures; experimental verification; heating component size; self-oxidation exothermic impact; mathematical modelling; data processing errors.

DOI: 10.1504/IJMME.2014.060195

International Journal of Mining and Mineral Engineering, 2014 Vol.5 No.2, pp.106 - 116

Received: 11 Jan 2013
Accepted: 09 Jun 2013

Published online: 10 Sep 2014 *

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