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Evaluation of thermo-physical properties and drying kinetics of carrots in a convective hot air drying system

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dc.contributor.authorGuiné, Raquel
dc.contributor.authorGonçalves, João Carlos
dc.contributor.authorCalado, Ana Rita
dc.contributor.authorCorreia, Paula
dc.date.accessioned2016-09-29T08:15:30Z
dc.date.available2016-09-29T08:15:30Z
dc.date.issued2016
dc.description.abstractThis paper presents an experimental study on the evolution of carrot properties along convective drying by hot air at different temperatures (50ºC, 60ºC and 70ºC). The thermo-physical properties calculated were: specific heat, thermal conductivity, diffusivity, enthalpy, heat and mass transfer coefficients. Furthermore, the data of drying kinetics were treated and adjusted according to the three empirical models: Page, Henderson & Pabis and Logarithmic. The sorption isotherms were also determined and fitted using the GAB model. The results showed that, generally, the thermo-physical properties presented a decline during the drying process, and the decrease was faster for the temperature of 70ºC. It was possible to verify that the Page model presented the best prediction ability for the representation of kinetics of the drying process. The GAB model used to fit the sorption isotherms showed a good prediction capacity and, at a given water activity, despite some variations, the amount of water sorbed increased with the decrease of drying temperature.pt_PT
dc.identifier.citationGuiné RPF, Gonçalves JC, Calado ARP, Correia PMR. (2016) Evaluation of thermo-physical properties and drying kinetics of carrots in a convective hot air drying system. Agricultural Engineering International: CIGR Journal, 18(3), 245-257.pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.19/3356
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.relation.publisherversionhttp://www.cigrjournal.org/index.php/Ejounral/article/view/3680pt_PT
dc.subjectkinetic modelpt_PT
dc.subjectmass transfer coefficientpt_PT
dc.subjectenthalpypt_PT
dc.subjectthermal conductivitypt_PT
dc.subjectdiffusivitypt_PT
dc.subjectheat transfer coefficientpt_PT
dc.titleEvaluation of thermo-physical properties and drying kinetics of carrots in a convective hot air drying systempt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage257pt_PT
oaire.citation.issue3pt_PT
oaire.citation.startPage245pt_PT
oaire.citation.titleAgricultural Engineering International: CIGR Journalpt_PT
oaire.citation.volume18pt_PT
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT

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