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Assessing the potential of energy saving in a traditional sugar canemill during steady state and transient conditions: part I: basecase plant model
KTH, Superseded Departments, Energy Technology.
KTH, Superseded Departments, Energy Technology.
Addis Ababa University, Ethiopia.
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.ORCID iD: 0000-0002-3661-7016
2015 (English)In: Biomass Conversion and Biorefinery, ISSN 2190-6823Article in journal, Editorial material (Refereed) Published
Abstract [en]

Sugar cane mills are energy intensive industries andalso have a large potential of providing surplus energy interms of heat or power. Identification of heat and mechanicallosses in sugar mills is one approach in indicating energysaving potential in sugar mills, especially in traditional mills.Such assessment of the energy flows in sugar mills needs to bedone both in steady state and transient conditions (where suddenstoppages occur). In this paper, such an approach is consideredwhere a base case plant is modeled for steady state andtransient state operations. For the transient state study, a typicalstoppage is chosen and three different scenarios aremodeled. Heat loss calculations are done for major cogenerationunits and for the amount accumulated of the surplus bagassewhen the steady state operation is estimated. The resultsof the models show that during steady state operation, thelosses related to mechanical prime movers is on the higherside as the mills and shredder are driven by steamand generatemechanical power higher than what is needed by the mills andthe shredder equipment themselves. In the transient statescenarios, where fuel oil is introduced during press mill stoppage,there is steam wasted (steam that could have been usedfor mechanical power generation) starting from the periodwhere the fuel oil is introduced until the power required duringthe stoppage is reached. The CO2 emission during the use offuel oil is also quite significant during the stoppage.

Place, publisher, year, edition, pages
Springer, 2015.
Keyword [en]
Sugar cane, Heat loss, Sudden stoppage, Transient, Model
National Category
Energy Engineering
Research subject
Energy Technology
Identifiers
URN: urn:nbn:se:kth:diva-185729DOI: 10.1007/s13399-015-0179-1ISI: 000377398800010OAI: oai:DiVA.org:kth-185729DiVA: diva2:923180
Funder
Sida - Swedish International Development Cooperation Agency
Note

QC 20160512

Available from: 2016-04-25 Created: 2016-04-25 Last updated: 2016-07-05Bibliographically approved

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