Animal feeding stuffs, animal products, and faeces or urine. Determination of gross calorific value. Bomb calorimeter method

A bomb calorimeter is an apparatus used for measuring the performance of coal in term of heat of combustion. Recent awareness has been created regarding uncertainty of measurement, due to mainly two reasons. Laboratory accreditation, which has steadily been on the rise, which requires a estimation of uncertainty of measurement particularly in the field of calibration. Second, increased maturity level of the quality system certification as the manufacturing companies looking at the reliability of measurement through correct calibration of inspection, measuring and test equipment. The quality of coal is decided by the various parameters such as ash content, air dried moisture, volatile matter, gross calorific value and sulphur content etc. The grade of coal is decided by the quality of coal which decides the performance of generation of electricity. The uncertainty of measurement in bomb calorimeter gets affected by various parameters. This paper describes the methodology, uncertainty calculations and effects of individual factors on it.

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Determination of Uncertainty in Gross Calorific Value of Coal Using Bomb Calorimeter

Advanced Instrument Engineering ◽

10.4018/978-1-4666-4165-5.ch021 ◽

2013 ◽

pp. 292-299

Author(s):

N.K. Mandavgade ◽

S.B. Jaju ◽

R.R. Lakhe

Keyword(s):

Calorific Value ◽

Volatile Matter ◽

Individual Factors ◽

Uncertainty Of Measurement ◽

Manufacturing Companies ◽

Gross Calorific Value ◽

Bomb Calorimeter ◽

Estimation Of Uncertainty

A bomb calorimeter is an apparatus used for measuring the performance of coal in term of heat of combustion. Recent awareness has been created regarding uncertainty of measurement, due to mainly two reasons. Laboratory accreditation, which has steadily been on the rise, which requires a estimation of uncertainty of measurement particularly in the field of calibration. Second, increased maturity level of the quality system certification as the manufacturing companies looking at the reliability of measurement through correct calibration of inspection, measuring and test equipment. The quality of coal is decided by the various parameters such as ash content, air dried moisture, volatile matter, gross calorific value and sulphur content etc. The grade of coal is decided by the quality of coal which decides the performance of generation of electricity. The uncertainty of measurement in bomb calorimeter gets affected by various parameters. This paper describes the methodology, uncertainty calculations and effects of individual factors on it.

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Analysing the effect of thermal modification on the calorific values of Eucalyptus nitens wood

Les/Wood ◽

10.26614/les-wood.2021.v70n02a03 ◽

2021 ◽

Vol 70 (2) ◽

Author(s):

Saurav Nepal ◽

Rupert Wimmer ◽

Volker Zelinski

Keyword(s):

Statistical Analysis ◽

Thermal Treatment ◽

Strong Correlation ◽

Calorific Value ◽

Thermal Modification ◽

Eucalyptus Nitens ◽

Gross Calorific Value ◽

Untreated Sample ◽

Bomb Calorimeter

Gross and net calorific value of 13 samples of Eucalyptus nitens wood were determined at HAWK (Hochschule für Angewandte Wissenschaft und Kunst), Göttingen, Germany. Among 13 samples, 12 were thermally modified and one was unmodified. Calorific values of samples were determined by using a bomb calorimeter, and the wood components (cellulose, hemicellulose, lignin, and extractives) already analysed by Wentzel et al. (2019). After determination of the values, samples were statistically analysed by R studio to find the relations among the calorific value, temperature, and wood components. The gross calorific value and net calorific value of the untreated sample of Eucalyptus nitens were found to be 18.83 MJ/kg and 17.48 MJ/kg, and after thermal modification these increased up to 20.24 MJ/kg and 18.84 MJ/kg. Upon statistical analysis, the results for lignin showed a strong correlation with the temperature of thermal treatment and calorific value.

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