International Journal of
Physical Sciences

  • Abbreviation: Int. J. Phys. Sci.
  • Language: English
  • ISSN: 1992-1950
  • DOI: 10.5897/IJPS
  • Start Year: 2006
  • Published Articles: 2572

Full Length Research Paper

Energy and exergy analyses of a parallel flow, four-stage cyclone precalciner type cement plant

Ahmet Kolip1* and Ahmet Fevzi Savas2
1Faculty of Technical Education, University of Sakarya, 54187 Esentepe, Sakarya, Turkey. 2Osmaneli Vocational School, University of Bilecik, 11500 Osmaneli, Bilecik, Turkey.
Email: [email protected]

  •  Accepted: 21 June 2010
  •  Published: 31 July 2010

Abstract

It is well known that cement production is one of the most energy consuming industries in the world and comes after steel industry (19.7%). For this reason, energy saving and efficiency efforts target these industries in the first place. The method developed for cement industry, in which the ratio of energy costs with respect to total costs is very high (55%) that provides the optimum working ranges according to energy costs and efficiency for the units.  Additionally, in the case of a problem occurring in the system, whether the source is a parameter or not on a unit is detected easily. In this paper, a mathematical model related to energy and exergy balance for four-stage cyclone precalciner type cement plant is developed. The energy and exergy balances for the whole system and each unit are calculated and presented. The results showed that the first and second law efficiencies were 51 and 28%, respectively. Total exergy loss of the system was found to be about 72%.

 

Key words: Parallel flow, precalciner, cement, energy and exergy analysis, mathematical model.