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A Comparison of Various Technological Options for Improving Energy and Water Use Efficiency in a Traditional Sugar Mill
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.ORCID iD: www.0000-0001-8091-8767
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
University “Marta Abreu” of Las Villas (UCLV), Cuba.
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.ORCID iD: 0000-0002-3661-7016
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2016 (English)In: Sustainability, ISSN 2071-1050, E-ISSN 2071-1050, Vol. 8, no 12, article id 1227Article in journal (Refereed) Published
Abstract [en]

This study is a comparison of four technological improvements proposed in previous works for the Cuban sugar mill Carlos Balino. These technological options are: (1) utilization of excess wastewater for enhanced imbibition; (2) utilization of waste heat for thermally driven cooling; (3) utilization of excess bagasse for pellets; and (4) modification of the cogeneration unit for maximum electric power generation. The method used for the evaluation of the technological options involves using criteria such as energy saving, financial gains, and CO2 emission saving potential. The results of the analysis show that the first three technological improvement options are attractive only during the crushing season. On the other hand, the last technological improvement option can be attractive if a year round generation of surplus power is sought. The first technological improvement option leads to only minor changes in energy utilization, but the increase in sugar yield of 8.7% leads to attractive profitability with an extremely low payback period. The CO2 emissions saved due to the fourth technological improvement option are the highest (22,000 tonnes/year) and the cost of CO2 emissions saved for the third technological improvement option (lowest) amount to 41 USD/tonne of CO2 emissions saved. The cycle efficiencies of the third and fourth technological improvement options are 37.9% and 36.8%, respectively, with payback periods of 2.3 and 1.6 years. The second technological improvement option is the least attractive alternative of the group.

Place, publisher, year, edition, pages
MDPI AG , 2016. Vol. 8, no 12, article id 1227
Keywords [en]
sugar cane bagasse, Carlos Balino, energy efficiency, wastewater reuse, imbibition, CO2 emission, absorption chiller, pellet, electricity, energy saving, payback period
National Category
Environmental Sciences
Identifiers
URN: urn:nbn:se:kth:diva-199509DOI: 10.3390/su8121227ISI: 000389317100018Scopus ID: 2-s2.0-85007346954OAI: oai:DiVA.org:kth-199509DiVA, id: diva2:1066051
Note

QC 20170117

Available from: 2017-01-17 Created: 2017-01-09 Last updated: 2019-04-12Bibliographically approved

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Martin, Andrew R.

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