نتایج جستجو برای: minimum fluidizing velocity

تعداد نتایج: 303727  

2006

Mobile sensors cover more area over a period of time than same number of stationary sensors. However, the quality of coverage achieved by mobile sensors depends on the velocity, mobility pattern, number of mobile sensors deployed and the dynamics of the phenomena being sensed. The gains attained by mobile sensors over static sensors and the optimal motion strategies for mobile sensors are not w...

2006

Mobile sensors cover more area over a period of time than same number of stationary sensors. However, the quality of coverage achieved by mobile sensors depends on the velocity, mobility pattern, number of mobile sensors deployed and the dynamics of the phenomena being sensed. The gains attained by mobile sensors over static sensors and the optimal motion strategies for mobile sensors are not w...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه ارومیه - دانشکده کشاورزی 1393

پایین بودن ظرفیت گرمای ویژه ی هوا و همچنین، پایین بودن ضریب انتقال حرارت جابه جایی مابین سیال هوای عبوری از مجرای کالکتور و صفحه ی جاذب حرارت، از مشکلات اصلی استفاده سیال هوا در کالکتورهای تخت خورشیدی می باشد. ایجاد ناهمواری در زیر صفحه ی جاذب حرارت از جمله روش های موثر در افزایش ضریب انتقال حرارت جابه جایی، شکستن زیرلایه ی آرام، به منظور افزایش سطح و زمان تماس هوا با صفحه ی جاذب حرارت در جریان...

2006
Alhussein A. Abouzeid

Mobile sensors cover more area over a fixed period of time than the same number of stationary sensors. However, the quality ofcoverage achieved by mobile sensors depends on the velocity, mobility pattern, number of mobile sensors deployed and the dynamicsof the phenomenon being sensed. The gains attained by mobile sensors over static sensors and the optimal motion strategies formobi...

اسماعیل زاده, آرزو, زارع, سودابه, گلبابایی, فریده,

  Background & Objectives : Chemicals are serious harmful agents in the workplace, especially chemistry labs. This material may cause poisoning and different diseases. Laboratory hoods as first safety device protect laboratory workers against hazardous chemicals. This research conducted on chemistry labs in a petrochemical company for awareness of the hoods performance and proposed the nee...

اسماعیل زاده, آرزو, رحیمی, عباس , شاه طاهری, سیدجماالدین, گل بابائی, فریده,

Background and Aim: Laboratory fume-hoods are the first-level protection for the laboratory staff against hazardous chemical pollutants. Considering the large numbers of personnel, especially in petrochemical industry laboratories, this project was carried out in order to assess the performance of laboratory hoods based on tracer gas (SF6).Materials and Methods: In this project 22 hoods in the ...

Journal: :health scope 0
amirabbas mofidi department of occupational health engineering, faculty of medical sciences, tarbiat modares university, tehran, ir iran hassan asilian department of occupational health engineering, faculty of medical sciences, tarbiat modares university, tehran, ir iran; department of occupational health engineering, faculty of medical sciences, tarbiat modares university, tehran, ir iran. tel.: +98-9123873932, fax: +98-2182883825 ahmad jonidi jafari department of environment health engineering, faculty of medical sciences, tarbiat modares university, tehran, ir iran

conclusions results indicated that annular fluidized bed reactor’s adsorbers are useful techniques for vocs adsorption. comparison of two particle ranges indicates that in all concentrations and all flow rates of the experiments, smaller particle size adsorption are better. in superficial velocity above the minimum fluidization velocity, pressure drop of fluidized beds are less than the pressur...

2013
Nafees P. Khan D. J. Tidke R. L. Sonolikar

The fluidization behavior of silica gel was tested in a fluidized bed under different sound pressure levels and sound frequencies. It has been found that the particle mixtures can be fluidized smoothly with sound assistance at low sound frequency owing to the sound energy disrupting large size of agglomerates. The minimum fluidization velocity was found to decrease with increasing sound frequen...

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