بررسی ناهمگنی دما در سردخانه و تاثیر آن بر شیرین شدن در دمای پایین در سیب‌زمینی با استفاده از دینامیک سیالات محاسباتی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه آموزشی علوم باغبانی و مهندسی فضای سبز.پردیس کشاورزی و منابع طبیغی و دانشگاه تهران. ایران

2 گروه علوم باغبانی و فضای سبز، دانشکده علوم و مهندسی کشاورزی، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران، کرج. ایران

3 گروه علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی، کرج، دانشگاه تهران

چکیده

دینامیک سیالات محاسباتی (CFD) برای مطالعه جریان هوا و توزیع دما در سردخانه و یافتن ترازهای دمایی استفاده شد. قندکل[1]، قند احیا[2] و ساکارز[3] غده‌های سیب‌زمینی رقم سانته ذخیره شده در 5 درجه سلسیوس و رطوبت نسبی 80٪ استخراج شد. نتایج نشان داد اختلاف معنی‌داری بین قند کل، قند احیا و ساکارز به دلیل ناهمگنی توزیع دما که منجر به اختلاف ‌2 درجه سلسیوس بین گرم‌ترین و سردترین نقاط درون توده محصول شد، وجود ‌دارد. تغییرات در محتوای قندها با ترازهای دمایی شبیه‌سازی شده مطابقت داشت. ‌نرخ افزایش قندهای محلول به یک درجه سلسیوس کاهش دما، به ترتیب برای قند کل، ساکارز و قند احیا 07/4، 15/3 ,67/0 میلی‌گرم بر گرم ماده خشک پیش‌بینی‌ شد. دینامیک سیالات محاسباتی[4] با بررسی جریان سیال و توزیع دما و نمایش مناطق بحرانی، باعث بهبود روش‌های بسته‌بندی و چیدمان محصول و هدایت بهتر جریان هوا می‌شود.



[1]. Total Sugar


[2]. Reducing Sugar (Glucose and Fructose)


[3]. Sucrose


[4]. Computational fluid dynamics (CFD (

کلیدواژه‌ها


عنوان مقاله [English]

Temperature Heterogeneity Study in Cold Storage and Its Effect on Low-Temperature Sweetening (LTS) in Potato Using Computational Fluid Dynamics

نویسندگان [English]

  • Naeimeh Samavatean 1
  • Siamak Kalantari 2
  • Mohammad Layeghi 3
  • Mojtaba Delshad 2
1 Faculty of Natural Resources, College of Agricultural Science and Engineering, University of Tehran, Karaj-Iran
2 Faculty of Agricultural Sciences and Engineering, University of Tehran, Karaj, Iran
3 Department of Wood and Paper Science and Technology, Faculty of Natural Resources, University of Tehran, Karaj, Iran
چکیده [English]

Computational Fluid Dynamics (CFD) was used to study airflow and temperature distribution in cold storage and finding temperature levels. Total sugar, reducing sugar and sucrose of potato tubers cv Sante stored at 5 °C and relative humidity of 80%, were extracted. The results showed that there was a significant difference between the concentration of total sugars, reducing sugar and sucrose due to temperature distribution heterogeneity.It led to a 2 °C difference between the warmest and coldest points in product mass. Changes in the content of sugars were matched with simulated temperature contours. The rate of increase in soluble sugars was predicted by reducing 1 °C air temperature. Total sugars, sucrose, and reducing sugar were 4.27, 3.15 and 0.67 mg/g dry matter, respectively. Computational fluid dynamics, by analyzing fluid flow and distributing temperature and detected critical areas, leads to improving packaging and product placement, and improve airflow in the stack.

کلیدواژه‌ها [English]

  • Computational Fluid Dynamics
  • Plastic Packaging
  • potato
  • simulation
  • Sugar
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