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Energetic and exergetic analysis of a convective drier: A case study of potato drying process

2020Journal article Open access
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dc.contributor.authorGolpour, I.
dc.contributor.authorKaveh, M.
dc.contributor.authorChayjan, R. A.
dc.contributor.authorGuiné, Raquel
dc.date.accessioned2020-10-27T08:32:15Z
dc.date.available2020-10-27T08:32:15Z
dc.date.issued2020
dc.description.abstractThis research work focused on the evaluation of energy and exergy in the convective drying of potato slices. Experiments were conducted at four air temperatures (40, 50, 60 and 70 ºC) and three air velocities (0.5, 1.0 and 1.5 m/s) in a convective dryer, with circulating heated air. Freshly harvested potatoes with initial moisture content of 79.9% wet basis were used. The influence of temperature and air velocity was investigated in terms of energy and exergy (energy utilization and energy utilization ratio, exergy losses and exergy efficiency). The calculations for energy and exergy were based on the 1st and 2nd laws of thermodynamics . Results indicated that energy utilization (EU), energy utilization ratio (EUR) and exergy losses decreased along drying time, while exergy efficiency increased. The specific energy consumption (SEC) varied from 1.94×105 to 3.14×105 kJ/kg. The exergy loss varied in the range of 0.006 to 0.036 kJ/s and the maximum exergy efficiency obtained was 85.85% at 70 ºC and 0.5 m/s, while minimum exergy efficiency was 57.07% at 40 ºC and 1.5 m/s. Moreover, the values of exergetic improvement potential rate (IP) changed between 0.0016-0.0046 kJ/s and the highest value occurred for drying at 70 ºC and 1.5 m/s, whereas the lowest value was for 70 ºC and 0.5 m/s. As a result, this knowledge will allow the optimization of convective dryers, when operating for the drying of this food product or others, as well as choosing the most appropriate operating conditions that cause reduction of energy consumption, irreversibilities and losses in the industrial convective drying processes.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationGolpour I, Kaveh M, Chayjan RA, Guiné RPF (2020) Energetic and exergetic analysis of a convective drier: A case study of potato drying process. Open Agriculture, 5(1), 563-572.pt_PT
dc.identifier.doi10.1515/opag - 2020 - 0058pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.19/6390
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherde Gruyterpt_PT
dc.subjectconvective dryingpt_PT
dc.subjectenergy utilizationpt_PT
dc.subjectenergy utilization ratiopt_PT
dc.subjectpotato samplespt_PT
dc.subjectenergy and exergy analyses,pt_PT
dc.titleEnergetic and exergetic analysis of a convective drier: A case study of potato drying processpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage572pt_PT
oaire.citation.issue1pt_PT
oaire.citation.startPage563pt_PT
oaire.citation.titleOpen Agriculturept_PT
oaire.citation.volume5pt_PT
person.familyNamede Pinho Ferreira Guiné
person.givenNameRaquel
person.identifierhttps://scholar.google.pt/citations?user=abFDovIAAAAJ&hl=pt-PT
person.identifier.ciencia-id8B13-5492-0F23
person.identifier.orcid0000-0003-0595-6805
person.identifier.scopus-author-id6603138390
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication59580952-77cc-4e4e-ae90-527a8b994f9f
relation.isAuthorOfPublication.latestForDiscovery59580952-77cc-4e4e-ae90-527a8b994f9f

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