Investigation of drying kinetics of tomato slices dried by using a closed loop heat pump dryer
Yazarlar (4)
Salih Coşkun Uludağ Üniversitesi, Türkiye
İbrahim Doymaz Yıldız Teknik Üniversitesi, Türkiye
Doç. Dr. Cüneyt TUNÇKAL Yalova Üniversitesi, Türkiye
Seçil Erdoğan Ministry of Agriculture & Forestry - Turkey
Makale Türü Açık Erişim Özgün Makale (SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale)
Dergi Adı Heat and Mass Transfer
Dergi ISSN 0947-7411 Wos Dergi Scopus Dergi
Dergi Tarandığı Indeksler SCI-Expanded
Makale Dili İngilizce Basım Tarihi 06-2017
Cilt / Sayı / Sayfa 53 / 6 / 1863–1871 DOI 10.1007/s00231-016-1946-7
Makale Linki http://link.springer.com/10.1007/s00231-016-1946-7
Özet
In this study, tomato slices were dried at three different drying air temperatures (35, 40 and 45 degrees C) and at 1 m/s air velocities by using a closed loop heat pump dryer (HPD). To explain the drying characteristics of tomato slices, ten thin-layer drying models were applied. The drying of tomato slices at each temperature occurred in falling-rate period; no constant-rate period of drying was observed. The drying rate was significantly influenced by drying temperature. The effective moisture diffusivity varied between 8.28 x 10(-11) and 1.41 x 10(-10) m(2)/s, the activation energy was found to be 43.12 kJ/mol. Besides, at the end of drying process, the highest mean specific moisture extraction ratio and coefficient of performance of HPD system were obtained as 0.324 kg/kWh and 2.71, respectively, at the highest drying air temperature (45 degrees C).
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