Journal
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
Volume 115, Issue 1, Pages 903-908Publisher
SPRINGER
DOI: 10.1007/s10973-013-3323-9
Keywords
Standard chemical exergy; Coal; Heavy fuel oil; Natural gas; Thermal power plant
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This paper presents the methods for the calculation of chemical exergies of coal, heavy fuel oil and natural gas that are used as fuel in conventional thermal power plants. Calculations have shown that the chemical composition of the fuel greatly influences the value of its chemical exergy. In case of coal in which carbon and hydrogen are not combined together, an increase in both carbon and hydrogen contents increases its chemical exergy value. In case of heavy fuel oils, hydrogen-carbon ratio is the most influencing parameter in the chemical exergy value. An increase in hydrogen-carbon ratio in the fuel tends to increase its chemical exergy. In case of natural gases, a decrease in lighter hydrocarbon gas contents and an increase in heavier hydrocarbon gas contents tend to increase the chemical exergy value of the fuel. High moisture and/or ash contents also tend to lower the value of the chemical exergy.
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