با همکاری انجمن علوم و صنایع غذایی ایران

نوع مقاله : مقاله پژوهشی لاتین

نویسندگان

گروه مکانیک بیوسیستم، دانشگاه علوم کشاورزی و منابع طبیعی گرگان

چکیده

در این تحقیق آنالیز انرژی و اکسرژی در خشک‌کن ماکروویو برای خشک کردن برش‌های پرتقال بررسی شده است که برای این تحقیق ابتدا پرتقال‌ها به‌صورت برش‌های با ضخامت 4 میلی‌متر بریده شده سپس با روش اهمیک در زمان‌های پیش تیمار 3، 5 و 7 دقیقه در ولتاژهای 30،50 و 70 ولت تحت پیش تیمار اهمیک قرار گرفتند. سپس نمونه‌ها در سه تکرار با استفاده از خشک‌کن ماکروویو در سه توان 90، 360 و 900 وات خشک شدند. آنالیزهای آماری نشان داد که زمان اهمیک، ولتاژ اهمیک و توان ماکروویو برای بازده انرژی و اکسرژی و اکسررژی و انرژی تلف شده در سطح آماری 1 درصد معنی‌دار شده است. بیشترین مقدار بازده انرژی و اکسرژی در توان 900 وات و در زمان اهمیک 7 دقیقه مشاهده شد که به‌ترتیب 041/59 و 76/47 درصد بوده است. بیشترین مقدار انرژی تلف شده در توان 90 وات و زمان 3 دقیقه بود. توان ماکروویو، زمان اهمیک و ولتاز اهمیک همگی از لحاظ آماری برای پارامترهای (انرژی و اکسرژی) معنی‌دار بودند و با افزایش مقدار مقدار بازده انرژی و اکسرژی زیاد شد در حالی که انرژی و اکسرژی تلف شده کاهش یافت.

کلیدواژه‌ها

عنوان مقاله [English]

Energy and exergy analyses in microwave drying of orange slices

نویسندگان [English]

  • Mohsen Azadbakht
  • Mohammad Vahedi Torshizi
  • Fatemeh Noshad
  • Arash Rokhbin

Department of Biosystem Mechanic, Gorgan Agricultural and Natural Resources University, Gorgan, Iran

چکیده [English]

The orange samples were cut into slices with a thickness of 4 mm and treated with ohmic method for 3, 5, and 7 min as ohmic pre-treatment in three voltages 30, 50 and 70 V. Then, they were dried in three replicates using a microwave dryer and at three powers of 90, 360, and 900 W. The statistical analysis results showed that the ohmic time, ohmic voltage and microwave power are significant for the energy and exergy efficiency and specific energy and exergy loss at 1% level. The highest energy and exergy efficiency was observed at 900 W and in the ohmic time of 7 min. The highest energy and exergy efficiency was observed at 59.041% and 47.76%, respectively. The maximum energy loss was seen at 90 W and ohmic time of 3 min. The microwave power, ohmic time, and ohmic voltage were statistically significant for all the parameters (energy and exergy) such that with increasing them, the energy and exergy efficiency increased, while the specific exergy and energy loss decreased.

کلیدواژه‌ها [English]

  • Microwave
  • Energy and exergy
  • Orange
  • Ohmic pre-treatment
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