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Effect of Drying Temperature on Bioactive Compound Content of Red Onion Using Photovoltaic Ventilation Solar Dryers

Effect of Drying Temperature on Bioactive Compound Content of Red Onion Using Photovoltaic Ventilation Solar Dryers

Suherman Suherman1*, Muhammad Fahri Rizky1, Zaki Bahrul Fikri1, Hadiyanto Hadiyanto1,  Zane Vincevica-Gaile2, Anwar Saeed Khan3, Erkata Yandri4,5 and Iswahyudi Iswahyudi6 

1Diponegoro University, Semarang 50275, Central Java, Indonesia; 2University of Latvia, Riga LV-1004, Latvia; 3Department of Geography and Geomatics, University of Peshawar (KP), Pakistan; 4Graduate School of Renewable Energy, Darma Persada University, Special Region of Jakarta 13450, Indonesia; 5Center of Renewable Energy Studies, Darma Persada University, Jakarta 13450, Indonesia; 6Universitas Islam Madura, Pamekasan 69317, Madura, East Java, Indonesia.

*Correspondence | SuhermanSuherman, Department of Chemical Engineering, Faculty of Engineering, Diponegoro University, Jl. Prof. Soedarto, Tembalang, Semarang 50275, Central Java, Indonesia; Email:suherman.mz@che.undip.ac.id 

Figure 1:

Photovoltaic ventilation solar dryer schematic diagram.

Figure 2:

Temperature and intensity profiles on various variables (a) 50 oC, (b) 45oC, (c) 40 oC, (d) traditional.

Figure 3:

Relative humidity on various variables.

Figure 4:

Wet basis moisture content profile on various variables (I) 50 oC, (II) 45 oC (III) 40 oC, (IV) traditional.

Figure 5:

Drying rate profile on various variables (I) 50 oC, (II) 45 °C, (III) 40 oC, (IV) traditional.

Figure 6:

Temperature and intensity profile variable.

Figure 7:

Data plotting ln Deff vs (1/T).

Figure 8:

Graph of the difference between the observed value and the predicted value of variable I on various variables. (A) Lewis model, (B) Henderson and Pabis model.

Equation 1
Equation 3
Equation 4
Equation 5
Equation 6
Equation 7
Equation 8

Sarhad Journal of Agriculture

September

Vol.40, Iss. 3, Pages 680-1101

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