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Influence Collector Inclination of Solar Dryer on Apple ‘Golab’ Chips Drying

Omid Reza Roustapour ; Agricultural Engineering Research Center, Zarghan, Fars Province, Iran
Hamid Reza Gazor ; Agricultural Engineering Research Institute, Karaj, Iran


Puni tekst: engleski pdf 537 Kb

str. 101-108

preuzimanja: 314

citiraj


Sažetak

Thin layer of apple chips (‘Golab’) with 73.4% (wet basis) moisture content were dried in a hybrid solar dryer. A new mechanism was designed to change inclination of the collector. Drying experiments were run in three levels of airflow rates and two levels of collector tilted angle. In order to describe the thin layer drying, ten different models were selected. The goodness of fitting was evaluated by calculating and comparing the statistical values for each model. The approximation of diffusion and the Midilli model were chosen for 30, and 45 degrees of tilted angle, respectively. Besides, five linear and nonlinear equations were derived in order to establish the best relationship for every empirical coefficient with temperature and airflow rate. Results revealed that the 2nd polynomial equations were suitable to predict these coefficients. Comparison between moisture ratio data in different inclination evidenced that more drying intensity occurred with 30 degrees of slope angle and airflow 0.018 m3・s-1.

Ključne riječi

solar dryer; variable collector; drying model; apple

Hrčak ID:

151158

URI

https://hrcak.srce.hr/151158

Datum izdavanja:

1.12.2015.

Posjeta: 727 *