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Measuring of moisture content in biofuel; Fukthaltsmaetning av biobraensle

Abstract

Direct determination of the moisture content, i.e. analysis of the fuel, is the most dominating moisture measuring method of today, and is usually done manually by weighing and drying a sample. By measuring on the exhaust gases the moisture content is determined indirect. This method is based upon the fact that there is a relation between the moisture content in the fuel and in the exhaust gases. This is an alternative that is only considered briefly in this report. Acceptance test of the fuel today takes place in several ways. The methods vary from advanced automatic mechanical devices to manually taken tests made by the driver him self. In the simplest case when the plant only has one fuel supplier, deduction is maid against the amount of produced energy. There are no systems today that can automatically take tests for continuous measuring. This project aims to find methods that are practical for direct, automatic and continuous measurement of the moisture content for the following applications: Moisture determination of fuel supplies, acceptance test. Moisture determination for combustion control in furnaces and boilers. The possibilities to automate the sampling are discussed in detail, at which important background information concerning the handling problems  More>>
Authors:
Eriksson, Lars; Njurell, Rolf; Ehleskog, Rickard [1] 
  1. AaF Energikonsult AB, Stockholm (Sweden)
Publication Date:
Apr 01, 2002
Product Type:
Technical Report
Report Number:
SVF-773
Resource Relation:
Other Information: 11 refs, 7 figs. Figures and tables with text in English; PBD: Apr 2002
Subject:
09 BIOMASS FUELS; MOISTURE GAGES; WOOD FUELS; NEAR INFRARED RADIATION; X-RAY EQUIPMENT; RADIOWAVE RADIATION
OSTI ID:
20254129
Research Organizations:
Vaermeforsk, Stockholm (Sweden)
Country of Origin:
Sweden
Language:
Swedish
Other Identifying Numbers:
Other: Project Vaermeforsk-A9-858; ISSN 0282-3772; TRN: SE0207206
Availability:
Available from: Vaermeforsk Service AB, SE-101 53 Stockholm, Sweden; Available to ETDE participating countries only(see www.etde.org); commercial reproduction prohibited; OSTI as DE20254129
Submitting Site:
SWD
Size:
41 pages
Announcement Date:

Citation Formats

Eriksson, Lars, Njurell, Rolf, and Ehleskog, Rickard. Measuring of moisture content in biofuel; Fukthaltsmaetning av biobraensle. Sweden: N. p., 2002. Web.
Eriksson, Lars, Njurell, Rolf, & Ehleskog, Rickard. Measuring of moisture content in biofuel; Fukthaltsmaetning av biobraensle. Sweden.
Eriksson, Lars, Njurell, Rolf, and Ehleskog, Rickard. 2002. "Measuring of moisture content in biofuel; Fukthaltsmaetning av biobraensle." Sweden.
@misc{etde_20254129,
title = {Measuring of moisture content in biofuel; Fukthaltsmaetning av biobraensle}
author = {Eriksson, Lars, Njurell, Rolf, and Ehleskog, Rickard}
abstractNote = {Direct determination of the moisture content, i.e. analysis of the fuel, is the most dominating moisture measuring method of today, and is usually done manually by weighing and drying a sample. By measuring on the exhaust gases the moisture content is determined indirect. This method is based upon the fact that there is a relation between the moisture content in the fuel and in the exhaust gases. This is an alternative that is only considered briefly in this report. Acceptance test of the fuel today takes place in several ways. The methods vary from advanced automatic mechanical devices to manually taken tests made by the driver him self. In the simplest case when the plant only has one fuel supplier, deduction is maid against the amount of produced energy. There are no systems today that can automatically take tests for continuous measuring. This project aims to find methods that are practical for direct, automatic and continuous measurement of the moisture content for the following applications: Moisture determination of fuel supplies, acceptance test. Moisture determination for combustion control in furnaces and boilers. The possibilities to automate the sampling are discussed in detail, at which important background information concerning the handling problems associated with the point of measuring is illustrated. The measurement techniques that are described more in detail are NIR (Near Infra Red), radar technique, microwave technique, radio frequency scan, radioactive technique, double energy X-ray and some combinations of these techniques. In the report, suppliers of interesting instruments are presented. The fundamental technical demands and the basis that should be included in a specification of a measuring device are gathered. Our appraisal is that a sequel to this project should be concentrated on the following main issues: Automatic acceptance test: The measuring is suggested to be done with a test probe direct in the incoming batch. The most suited methods from our opinion are radio frequency measuring and reflection measuring with NIR. Automatic measuring for combustion control: The measuring should be done over a belt conveyor. Here the most suited method is double energy X-ray. Since the measuring takes place before the surge bin the flow trough it must be examined. Our opinion is that methods where the measuring is taken place at the output end of a surge bin are involved with a lot of problems because of the dusty and hot environment, and should not be considered further. There is though a possibility to place the device at the transition zone between bin and the shut where the density is the highest.}
place = {Sweden}
year = {2002}
month = {Apr}
}