000163177 001__ 163177
000163177 005__ 20251017161900.0
000163177 0247_ $$2doi$$a10.1016/j.energy.2025.138696
000163177 0248_ $$2sideral$$a145668
000163177 037__ $$aART-2025-145668
000163177 041__ $$aeng
000163177 100__ $$aPalacios-Bereche, M.C.
000163177 245__ $$aEnergy, exergy and economic assessment of the introduction of VHG fermentation in conventional bioethanol production process from sugarcane
000163177 260__ $$c2025
000163177 5060_ $$aAccess copy available to the general public$$fUnrestricted
000163177 5203_ $$aFermentation under Very High Gravity (VHG) conditions is an improved process that produces a wine with higher ethanol content, though requiring lower temperatures than conventional fermentation. Therefore, an auxiliary cooling system is required to maintain appropriate VHG fermentation conditions. Thus, the aim of this work is to evaluate—through energy, exergy, and economic assessments—the incorporation of the VHG fermentation process into a conventional ethanol and sugar production process. Three auxiliary cooling systems were evaluated: a) a vapour compression refrigeration system, b) an absorption refrigeration system, and c) an ejector cooling system. The VHG fermentation increases overall steam consumption by 1.7–5.3 % and reduces surplus electricity in the cogeneration system by 1.6–3.8 %. The case involving an ejector system showed the highest steam consumption and lowest surplus electricity; nevertheless, the global exergy efficiency remained around 44 % in all cases. Furthermore, VHG fermentation promotes a reduction in water consumption (−32 %) and in vinasse production (−60 %). Finally, the economic assessment showed that all auxiliary cooling systems presented economic feasibility for the assumed considerations; still, the ejector cooling system case presented the lowest capital cost (2.69 MMUSD) and the shortest payback (2.69 years).
000163177 536__ $$9info:eu-repo/grantAgreement/ES/DGA/T55-23R
000163177 540__ $$9info:eu-repo/semantics/embargoedAccess$$aby-nc-nd$$uhttps://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
000163177 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion
000163177 700__ $$aPalacios-Bereche, R.
000163177 700__ $$aGallego, A.G.
000163177 700__ $$aRossell, C.E.V.
000163177 700__ $$0(orcid)0000-0002-5161-7209$$aSerra, Luis M.$$uUniversidad de Zaragoza
000163177 700__ $$0(orcid)0000-0002-4411-9834$$aLozano, Miguel A.$$uUniversidad de Zaragoza
000163177 700__ $$aEnsinas, A.V.
000163177 700__ $$aNebra, S.A.
000163177 7102_ $$15004$$2590$$aUniversidad de Zaragoza$$bDpto. Ingeniería Mecánica$$cÁrea Máquinas y Motores Térmi.
000163177 773__ $$g337 (2025), 138696 [21 pp.]$$pEnergy$$tEnergy$$x0360-5442
000163177 8564_ $$s3077034$$uhttps://zaguan.unizar.es/record/163177/files/texto_completo.pdf$$yPostprint$$zinfo:eu-repo/date/embargoEnd/2027-09-27
000163177 8564_ $$s1396868$$uhttps://zaguan.unizar.es/record/163177/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint$$zinfo:eu-repo/date/embargoEnd/2027-09-27
000163177 909CO $$ooai:zaguan.unizar.es:163177$$particulos$$pdriver
000163177 951__ $$a2025-10-17-14:07:32
000163177 980__ $$aARTICLE