Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.19/1372
Título: Experimental determination and computer fitting of desorption isotherms of D. Joaquina pears.
Autor: Guiné, Raquel
Castro, José
Palavras-chave: sorption isotherms
GAB model
least squares
orthogonal disntance regression
Data: 2002
Citação: Guiné RPF, Castro JAAM. (2002) Experimental determination and computer fitting of desorption isotherms of D. Joaquina pears. Food and Bioproducts Processing, 80(C3), 149-154.
Relatório da Série N.º: 80;C3
Resumo: Desorption isotherms at different operating temperatures provide valuable information for the design and control of drying processes. In the present work the desorption isotherms of pears are determined according to two equivalent forms of the G.A.B. model at temperatures of 20, 25 and 30 ºC. These cover the range of summer average daily temperatures in Portugal, when the solar drying of pears is carried out. Two different computer fitting methodologies are used, namely, Ordinary Least Squares (OLS) and Orthogonal Distance Regression (ODR), in order to evaluate the above mentioned forms of the G.A.B. model. From the results obtained it is possible to conclude that the ODR fitting is clearly more adequate than the OLS technique for this kind of experimental problem. Moreover, it is advisable to exploit the full form of the G.A.B. model instead of its simplified and restricted version. Finally, the desorption isotherms do not vary significantly in the temperature range under study.
Peer review: yes
URI: http://hdl.handle.net/10400.19/1372
Aparece nas colecções:ESAV - DIA - Artigos publicados em revista científica

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