scholarly journals The Calculation of Expense Reduction based on the Efficiency of Cyclone by Computational Fluid Dynamic

2021 ◽  
Vol 2 (2) ◽  
pp. 85
Author(s):  
Dhany Eko Wahyudi ◽  
Syarifa Nur’aini ◽  
Wulandari Kusuma Dewi ◽  
Retno Mardiyah Aisyah ◽  
Eka Lutfi Septiani
Keyword(s):  
Pressure Drop ◽  
Fluid Dynamic ◽  
Ash Content ◽  
The Other ◽  
Lagrangian Model ◽  
Navier Stokes ◽  
Maximum Point ◽  
Drying Process ◽  
Hot Air ◽  
Cfd Method

<p>The rotary kiln in cement industries used hot air (temperature 1450<sup>0</sup>C)  for doing a reaction to form a clinker. The outlet hot air from the combustion reaction in the kiln is reused to decrease the water content of coal in the coal mill. However, the hot air that contained ash will affect the drying process in the coal mills will not reach the maximum point. Therefore, the hot air needs treatment to separate the hot air and particle. The hot air is carried out to the cyclone. The goal of this study is to investigate the efficiency work of cyclones in cement industries using the CFD method. Besides, the other goal of this research will convey the expense that is reduced in decreasing the ash content in hot air. In general, the good cyclone has the low-pressure drop, the turbulence model using Reynold Average Navier Stokes (RANS) simulation,k-ε standard, with the Lagrangian model to solve the problem in particle lane. The result of this study is showing the pattern of the ash in cyclones,  the pressure in cyclones, and the efficiency of cyclones. The number of efficiencies will affect the reduction of expense in this section.</p>

Effect of Blade Numbers on Pressure Drop of Axial Cyclone Separators by CFD

2011 ◽  
Vol 55-57 ◽  
pp. 343-347 ◽  
Author(s):  
Yi Gang Luan ◽  
Hai Ou Sun
Keyword(s):  
Pressure Drop ◽  
Stokes Equations ◽  
Three Dimensional ◽  
Navier Stokes ◽  
Three Dimensional Model ◽  
Navier Stokes Equations ◽  
Pressure Drops ◽  
Computational Fluid Dynamics Cfd ◽  
Cfd Method ◽  
Resistance Performance

In this article, computational fluid dynamics(CFD) method is used to predict the effect of blade numbers on the pressure drop of axial cyclone separators. A three-dimensional model is built to acquire the resistance of axial cyclone separators with different blade numbers. The flow field inside cyclone separators is calculated using 3D Reynolds-averaged Navier-Stokes equations. And turbulence model is used to simulate the Reynold stress. Also pressure drop of cyclone separators with different blade numbers is expressed as a function of different inlet velocities. At the same inlet velocity with increasing the blade numbers, pressure drops of cyclones reduce greatly. And changing the blade number of cyclone separator is an effective method to improve its resistance performance.

scholarly journals ANALISIS PANAS KONDENSOR AC SPLIT DENGAN VARIASI PUTARAN FAN UNTUK PENGERINGAN PADI

2020 ◽  
Vol 6 (2) ◽  
pp. 136
Author(s):  
Yudhy Kurniawan ◽  
Kusnandar Kusnandar ◽  
Yusup Nur Rohmat ◽  
Wardika Wardika
Keyword(s):  
Relative Humidity ◽  
Air Conditioning ◽  
Rotation Speed ◽  
The Other ◽  
Drying Process ◽  
Speed Regulation ◽  
Hot Air ◽  
Fan Speed ◽  
Rice Drying

AbstrakPenggunaan Air Conditioning (AC) Split yang biasanya dipakai untuk keperluan pengondisian udara untuk kenyamanan, pada penelitian ini AC Split juga dimanfaatkan untuk pengeringan padi. Pengeringan padi dengan menggunakan AC Split ini merupakan jenis pengerinagn buatan yang mempunyai kelebihan dibanding dengan pengeringan alami yaitu waktu pengeringan yang lebih singkat. Pada AC Split udara panas yang dihasilkan dari kondensor yang dibuang ke lingkungan secara percuma akan dialirkan melalui sebuah saluran udara untuk dimanfaatkan untuk pengeringan padi. Pemanfaatan panas kondensor ini dilakukan untuk untuk mengetahui pengeringan padi dengan menggunakan variasi pengaturan kecepatan fan kondensor. Pada AC Split dilakukan untuk mengetahui laju pengeringan padi dengan kecepatan putaran fan sebesar 450 rpm dan 800 rpm.  Dari hasil data yang didapatkan selama 1,5 jam pada proses pengeringan padi diperoleh besarnya pengeringan padi berkurang sekitar 8% dan 12% untuk putaran fan kondensor 450 rpm dan 800 rpm. Adapun temperatur udara tertinggi dihasilkan oleh panas kondensor adalah sebesar 53,6oC. Adapun kelembaban relatifnya udaranya (Relative Humidity) adalah sebesar 15%.Kata Kunci: Pengeringan padi, AC Split, Panas kondensor, putaran fanAbstractThe use of Split of Air Conditioning (AC) which is usually used for air conditioning for human convenience. However, in this study Split AC is also used for drying rice. Rice drying using Split AC is a type of artificial drying that has an advantage compared to natural consumption, which is shorter drying. In Split AC the hot air generated from the condenser released into the environment is useless will be flowed through the air duct to be used for drying rice. The use of condenser heat is carried out to find out how to grow rice by using variations in the condenser fan speed regulation. In Split AC, it is done to find out the flow of drying with a variation fan rotation speed of 450 rpm and 800 rpm. From the results of the data experiment for taking around 1.5 hours in the drying process obtained 8% and 12% for the 450 rpm and 800 rpm condenser fan rotation each. Although the temperature of the air produced by the condenser heat is 53.6oC and 50.6oC. The other data of relative humidity of the air (Relative Humidity) is 15%.Keywords: Rice driyer, Split AC, condenser heat, fan rotation

scholarly journals The computation of flow in a rotating annulus by the method of artificial compressibility

1987 ◽  
Vol 6 (1) ◽  
pp. 27-35
Author(s):  
H. Grobler ◽  
J. A. Snyman
Keyword(s):  
Simple Model ◽  
Pressure Drop ◽  
The Other ◽  
Time Dependent ◽  
Navier Stokes ◽  
Governing Equations ◽  
Artificial Compressibility ◽  
Coaxial Cylinders ◽  
Method Of Solution ◽  
Original Time

The flow of an incompressible viscuous fluid is studied via the numerical solution of the discretised continuity and Navier-Stokes governing equations. In particular flow in an annulus formed by two coaxial cylinders, each of which may rotate with respect to the other, and where a pressure drop is prescribed over the lengths of the cylinders, is considered. As method of solution Chorin’s method of artificial compressibility is applied in which the time-independent governing equations are transformed into time-dependent auxiliary equations via the introduction of an artificial equation of state. The solution of the auxiliary equations converges to a stationary solution which corresponds to the solution of the original time-independent equations. The behaviour of the fluid, once fully developed laminar flow is reached, is successfully computed. A simple model is also proposed by which the development of flow along the annulus may be computed for any given inflow velocity profile. The computed results are in agreement with what one would expect from the physics of the problem.

scholarly journals Convective Drying of Ceramic Bricks by CFD: Transport Phenomena and Process Parameters Analysis

Energies ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 2073 ◽  
Author(s):  
Morgana de Vasconcellos Araújo ◽  
Balbina Raquel de Brito Correia ◽  
Vanderson Alves Agra Brandão ◽  
Iran Rodrigues de Oliveira ◽  
Rosilda Sousa Santos ◽  
...  
Keyword(s):  
Water Mass ◽  
Fluid Dynamic ◽  
Ceramic Materials ◽  
Convective Drying ◽  
Drying Process ◽  
Clay Brick ◽  
Ceramic Brick ◽  
Hot Air ◽  
Different Temperatures ◽  
Parameters Analysis

In the manufacturing process of ceramic brick, the step of drying needs the control of process variables to uniformly dry the porous material, producing a good end-product. The majority of numerical simulations involving drying of ceramic materials is performed considering only the solid domain, resulting in a very simplified and limited study. This way, the objective of this work is the analysis of the drying process with hot air of an industrial hollow clay brick inside the oven at different temperatures by using computational fluid dynamic (CFD). The results of the temperature and water mass distribution inside the brick and of air in the oven at different times of the drying process are shown, analyzed and checked with experimental data, and it was obtained in a concordance with the data. An equation to calculate the brick water mass diffusivity depending on the drying air temperature was proposed.

Simplification Model for Prediction of Pressure Drop in Wire Mesh Mist Eliminator by CFD

2010 ◽  
Vol 26-28 ◽  
pp. 297-302
Author(s):  
Yi Gang Luan ◽  
Hai Ou Sun
Keyword(s):  
Pressure Drop ◽  
Model Building ◽  
Cfd Simulation ◽  
Stokes Equations ◽  
Wire Mesh ◽  
Navier Stokes ◽  
Small Scale ◽  
Layer Spacing ◽  
Mist Eliminator ◽  
Cfd Method

In this article, computational fluid dynamics(CFD) method is used to predict the pressure drop of a wire mesh mist eliminator. A simplification method is used during the simulation process to solve the difficulty of model building during the simulation of the mist pad. A two-dimensional model is employed to acquire the resistance of mesh pad with different layer spacing. The flow field is calculated using 2D Reynolds-averaged Navier-Stokes equations. turbulence model is used to simulate the Reynold stress. And pressure drop of wire mesh mist eliminator is expressed as a function of broad ranges of inlet velocity. After CFD simulation, model experiment study is carried on using a small scale wind-tunnel. The pressure drop is gained to testify the numerical simulation result.

Structural Dynamic Analysis of a Hypersonic Composite Wing

2015 ◽  
Vol 813 ◽  
pp. 54-62 ◽  
Author(s):  
Xu Zhang ◽  
Yong Zhi Wang ◽  
Peng Wang ◽  
Wei Min Zhang
Keyword(s):  
Dynamic Analysis ◽  
Structural Model ◽  
Thermal Environment ◽  
Fluid Dynamic ◽  
Three Dimensional ◽  
Navier Stokes ◽  
Aerodynamic Heating ◽  
Structural Dynamic ◽  
Cfd Method ◽  
Composite Wing

Aerodynamic heating will be caused when a hypersonic vehicle is in flight, so it should be taken into account when a structural dynamic analysis is carried out. A method for structural dynamic analysis under thermal environment is presented in this paper. Firstly, Computational Fluid Dynamic (CFD) method which is based on solving the three-dimensional compressible Navier-Stokes (N-S) equations is employed to perform aerodynamic heating analysis. Secondly, Finite Element Method (FEM) is used to assess structural heat conduction and get temperature field. Lastly, based on the quasi-linear structural model, a structural dynamic analysis is analyzed under thermal environment. A hypersonic composite wing is investigated as a numerical example. Compared with the case without considering aerodynamic heating, major modes and frequencies of the wing change a lot because of the decrease of the elastic modulus and the alteration of structural stiffness distribution. The results indicate that the aerodynamic heating has a high influence on the vibration characteristics. Therefore, aerodynamic heating should be considered in hypersonic structural dynamic analysis.

scholarly journals Clogging sensitivity of flow distributors designed for radially elongated hexagonal pillar array columns: a computational modelling

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Farideh Haghighi ◽  
Zahra Talebpour ◽  
Amir Sanati-Nezhad
Keyword(s):  
Pressure Drop ◽  
Aspect Ratio ◽  
Contact Zone ◽  
Separation Efficiency ◽  
Fluid Dynamic ◽  
Computational Modelling ◽  
Channel Width ◽  
Fluid Distribution ◽  
Design Parameters ◽  
Pillar Array

AbstractFlow distributor located at the beginning of the micromachined pillar array column (PAC) has significant roles in uniform distribution of flow through separation channels and thus separation efficiency. Chip manufacturing artifacts, contaminated solvents, and complex matrix of samples may contribute to clogging of the microfabricated channels, affect the distribution of the sample, and alter the performance of both natural and engineered systems. An even fluid distribution must be achieved cross-sectionally through careful design of flow distributors and minimizing the sensitivity to clogging in order to reach satisfactory separation efficiency. Given the difficulty to investigate experimentally a high number of clogging conditions and geometries, this work exploits a computational fluid dynamic model to investigate the effect of various design parameters on the performance of flow distributors in equally spreading the flow along the separation channels in the presence of different degrees of clogging. An array of radially elongated hexagonal pillars was selected for the separation channel (column). The design parameters include channel width, distributor width, aspect ratio of the pillars, and number of contact zone rows. The performance of known flow distributors, including bifurcating (BF), radially interconnected (RI), and recently introduced mixed-mode (MMI) in addition to two new distributors designed in this work (MMII and MMIII) were investigated in terms of mean elution time, volumetric variance, asymmetry factors, and pressure drop between the inlet and the monitor line for each design. The results show that except for pressure drop, the channel width and aspect ratio of the pillars has no significant influence on flow distribution pattern in non-clogged distributors. However, the behavior of flow distributors in response to clogging was found to be dependent on width of the channels. Also increasing the distributor width and number of contact zone rows after the first splitting stage showed no improvement in the ability to alleviate the clogging. MMI distributor with the channel width of 3 µm, aspect ratio of the pillars equal to 20, number of exits of 8, and number of contact zones of 3 exhibited the highest stability and minimum sensitivity to different degrees of clogging.

scholarly journals Study on the Variable-Temperature Drying Process of Corn Drying in an Industrial Corn-Drying System Equipped with a Self-Adaptive Control Heat Exchanger

2021 ◽  
Vol 11 (6) ◽  
pp. 2772
Author(s):  
Bin Li ◽  
Zhiheng Zeng ◽  
Xuefeng Zhang ◽  
Ye Zhang
Keyword(s):  
Adaptive Control ◽  
Energy Consumption ◽  
Heat Loss ◽  
Thermal Performance ◽  
Variable Temperature ◽  
The Other ◽  
Drying Process ◽  
Drying Kinetic ◽  
Drying System ◽  
Self Adaptive

To realize energy-saving and efficient industrial grain drying, the present work studied the variable-temperature drying process of corn drying in a novel industrial corn-drying system with a heat recycling and self-adaptive control function. The drying kinetics, thermal performance, heat-loss characteristics and the heat-recycling performance of the drying system under different allocations between flue gas and hot air were investigated, and the optimized drying process was proposed and compared with two constant drying processes. The results showed that the optimized drying process exhibited better drying kinetic and thermal performance than the two constant drying processes. More specifically, the total heat loss, total energy consumption and specific energy consumption of the optimized drying process were ascertained to be 36,132.85 MJ, 48,803.99 MJ and 7290.27 kJ/kg, respectively, which were lower than those of the other two processes. On the other hand, the thermal efficiency of the drying chamber for the optimized drying process was ascertained to be varied within the range of 6.81–41.71%. Overall, the validation results showed that the optimized drying process can significantly improve the drying performance of the drying system.

Sign in / Sign up

Export Citation Format

Share Document