Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.19/1375
Título: Study of the drying kinetics of solar-dried pears.
Autor: Guiné, Raquel
Barroca, Manuel
Ferreira, Dulcineia
Gonçalves, Fernando
Palavras-chave: drying kinetics
drying rate
solar drying
pear
Data: 2007
Citação: Guiné RPF, Ferreira DMS, Barroca MJ, Gonçalves FM. (2007) Study of the drying kinetics of solar-dried pears. Biosystems Engineering, 98(4), 422-429.
Relatório da Série N.º: 98;4
Resumo: In this study the drying rates of solar dried pears were investigated for fruits of the varieties Amêndoa, Amorim, Carapinheira Branca and S. Bartolomeu, all originating from Portugal. From the results it was possible to conclude that all varieties showed a similar drying behaviour, characterised by the absence of the constant drying rate period and by a falling rate period involving two different stages, according to the degree of moisture removal. The experimental data for the variations in water content over time was fitted to two different empirical models with the better performance coming from the sigmoid function. The data for the curves of drying rate versus moisture content was fitted to one model, with good results. The variations of the drying rate with time were fitted to two models with the first order kinetic function fitting the experimental data better than a second degree polynomial. The experimental data was used to predict effective diffusivity according to Fick’s law with the values of diffusivity obtained ranging from 9.756e-10 m2 s-1 for the variety S. Bartolomeu to 1.160e-9 m2 s-1 for pears of the variety Amorim.
Peer review: yes
URI: http://hdl.handle.net/10400.19/1375
Aparece nas colecções:ESAV - DIA - Artigos publicados em revista científica

Ficheiros deste registo:
Ficheiro Descrição TamanhoFormato 
2007_BE_Argo158_Cinetica.pdf615,18 kBAdobe PDFVer/Abrir    Acesso Restrito. Solicitar cópia ao autor!


FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpace
Formato BibTex MendeleyEndnote Degois 

Todos os registos no repositório estão protegidos por leis de copyright, com todos os direitos reservados.