THE RESULTS OF PRACTICAL RESEARCH OF THE SEPARATOR IN AN EFFICIENT DESIGN THAT SEPARATES THE RAW COTTON FROM THE AIR

EPRA International Journal of Multidisciplinary Research (IJMR) ◽

10.36713/epra6098 ◽

2021 ◽

pp. 304-308

Author(s):

Ozod Rajabov ◽

Shukhrat Khayitov ◽

Mukhriddin Yokubov

Keyword(s):

Air Flow ◽

Efficient Design ◽

Natural Properties ◽

Mesh Surface ◽

Practical Research

The article provides information on the main disadvantages of separators currently used in ginneries. The results obtained by identifying ways to overcome the above-mentioned shortcomings and introducing into the production of separators of new efficient design are also presented. The analysis of the results shows that the improved SXM inertial separator allows to preserve the natural properties of cotton by 15-20% compared to the current SX separator, as well as to provide a stable and stable average of 15 t / h. KEYWORDS: raw cotton, separator, seed, mesh surface, air flow, vacuum - valve.

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Three Dimensional Simulation of Ventilation Flow Through a Solar Windcatcher

Volume 2: Computational Fluid Dynamics ◽

10.1115/ajkfluids2019-5383 ◽

2019 ◽

Cited By ~ 2

Author(s):

Peter Abdo ◽

Rahil Taghipour ◽

B. P. Huynh

Keyword(s):

Natural Ventilation ◽

Air Flow ◽

Ventilation System ◽

Three Dimensional ◽

Windward Side ◽

Efficient Design ◽

Indoor Space ◽

Wind Speeds ◽

Air Stream ◽

Stack Ventilation

Abstract Natural ventilation is the process of supplying and removing air through an indoor space by natural means. There are two types of natural ventilation occurring in buildings: winddriven ventilation and buoyancy driven or stack ventilation. The most efficient design for natural ventilation in buildings should implement both types of natural ventilation. Stack ventilation which is temperature induced is driven by buoyancy making it less dependent on wind and its direction. Heat emitted causes a temperature difference between two adjoining volumes of air, the warmer air will have lower density and be more buoyant thus will rise above the cold air creating an upward air stream. Combining the wind driven and the buoyancy driven ventilation will be investigated in this study through the use of a windcatcher natural ventilation system. Stack driven air rises as it leaves the windcatcher and it is replaced with fresh air from outside as it enters through the positively pressured windward side. To achieve this, CFD (computational fluid dynamics) tool is used to simulate the air flow in a three dimensional room fitted with a windcatcher based on the winddriven ventilation alone, buoyancy driven ventilation alone, and combined buoyancy and winddriven ventilation. Different wind speeds between 0 up to 2.5 m/s are applied and the total air flow rate through the windcatcher is investigated with and without temperature of 350 K applied at the windcatcher’s outlet wall. As the wind speed increased the efficiency of the solar windcatcher decreased.

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