Characterization and Evaluation of Mush Valley Coal for Its Application as A Domestic Energy Source

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Date

2018-06

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Publisher

AAU

Abstract

The main goal of this study is to substitute domestic biomass fuel energy source by the presented mush valley coal. To use it, a number of experiments were conducted before use in household application. During the experimental work the proximate and ultimate analysis where carried out through in different methods. The proximate analysis result shows the coal quality; from the analysis the coal has an average moisture content of 19%, volatile matter of 31.34%, ash content of 11.58, fixed carbon value of 38.02%, and its calorific value of 4117 kcal/kg and also Hard Grove Gridability Index values ranging between 45 and 64.3. Finally the proximate analysis result shows, the Mush Valley coal is fall under the rank of lignite A to sub-bituminous B categories. In the ultimate analysis the amount of Carbon, Hydrogen, Nitrogen, Sulfur and Oxygen were determined by using CHNS/O analyzer. To use coals for domestic application, effective stove was designed, fabricated and tested to evaluate the thermal performance of the stove. The design part of stove focused on, the insulation around the combustion chamber, air inlet to ensure the accessibility of sufficient air for the complete combustion of the fuel coal, and the integration of chimney to convey flue gases away from the place of use. Water boiling tests were carried out in order to produce the required data for evaluating the stove‟s performance by calculating Specific Fuel Consumption, Fire Power, Percent heat utilized and thermal efficiency. The performance evaluation shows that average fire power of 9.7 KW, average specific fuel consumption of 0.765, average percent heat utilized of 49 % and thermal efficiency of 58.3%. The efficiency of the results of the study, it can be seen that the performance of the designed coal stove is better than the traditional three-stone open fire reported to have efficiency of about 14-25%.

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Keywords

Mush Valley Coal, Domestic Energy Source, biomass fuel energy

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