scholarly journals Modelling of clinker cooler and evaluation of its performance in clinker cooling process for cement plants

2021 ◽  
Vol 39 (4) ◽  
pp. 1093-1099
Author(s):  
J.S. Oyepata ◽  
M.A. Akintunde ◽  
O.A. Dahunsi ◽  
S.S. Yaru ◽  
E.T. Idowu
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Mass Flow ◽  
Cooling System ◽  
Outlet Temperature ◽  
Theoretical Evaluation ◽  
Computational Fluid Dynamics Cfd ◽  
Solid Works ◽  
Cooling Air Flow ◽  
Cement Manufacturing

Cement manufacturing requires cooling down of hot clinker at temperature of about 1350o C to temperature lower than 100 o C in a cooling system known as clinker cooler. Many plants are unable to cool the clinker below 250o C. This challenge led to scaling down of actual clinker cooler to a test rig size in the ratio 25:1 suitable for simulation. Computational Fluid Dynamics (CFD) tools (Solid-Works and ANSYS) were used to achieve the simulation. The clinker outlet temperatures obtained from simulations were validated with theoretical evaluation. Results showed that with clinker and cooling air flow rates of 0.2 kg/s and 0.54 kg/s respectively and with a clinker bed height of 0.6 m. An optimum cooler performance was achieved with clinker outlet temperature of 68 oC. The scaled down cooler was 15% higher than the existing cooler in terms of recoverable energy and 10% high in terms of energy efficiency. Keywords: Clinker Cooler, Computational Fluid Dynamics (CFD), Mass flow rate clinker and Mass flow air and Clinker Furnace.

Averaging Nonuniform Flow for a Purpose

2005 ◽  
Vol 128 (1) ◽  
pp. 120-129 ◽  
Author(s):  
N. A. Cumpsty ◽  
J. H. Horlock
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Mass Flow ◽  
Gas Turbines ◽  
Nonuniform Flow ◽  
Flow Capacity ◽  
Crucial Feature ◽  
Blade Row ◽  
Different Types ◽  
Computational Fluid Dynamics Cfd

Averaging nonuniform flow is important for the analysis of measurements in turbomachinery and gas turbines; more recently an important need for averaging arises with results of computational fluid dynamics (CFD). In this paper we show that there is a method for averaging which is “correct,” in the sense of preserving the essential features of the nonuniform flow, but that the type of averaging which is appropriate depends on the application considered. The crucial feature is the decision to retain or conserve those quantities which are most important in the case considered. Examples are given to demonstrate the appropriate methods to average nonuniform flows in the accounting for turbomachinery blade row performance, production of thrust in a nozzle, and mass flow capacity in a choked turbine. It is also shown that the numerical differences for different types of averaging are, in many cases, remarkably small.

Numerical Model of the Start-Up Process of a Honeycomb Regenerator

2012 ◽  
Vol 532-533 ◽  
pp. 436-440
Author(s):  
Chong Zhi Mao ◽  
Qian Jian Guo ◽  
Lei He
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Numerical Calculation ◽  
Numerical Model ◽  
Thermal Process ◽  
Three Dimensional ◽  
Outlet Temperature ◽  
Start Up ◽  
Computational Fluid Dynamics Cfd ◽  
Ceramic Honeycomb

Ceramic honeycomb is a key component of high temperature air combustion (HiTAC) system and the three-dimensional numerical model is established which is for investing unsteady thermal process in honeycomb regenerator. The start-up period of honeycomb was simulated by means of computational fluid dynamics (CFD) software; the outlet temperature were obtained. The work in this paper provides a theory basis and guide to the exploitation and appliance of HTAC system and the results of the numerical calculation can be used as the foundation of engineering design.

scholarly journals Three-dimensional Analysis of Air Flow in a Flat Plate Solar Collector

2018 ◽  
Author(s):  
Mohammed Amine Amraoui ◽  
Khaled Aliane
Keyword(s):  
Heat Transfer ◽  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Flat Plate ◽  
Solar Collector ◽  
Three Dimensional ◽  
Outlet Temperature ◽  
Computational Fluid Dynamics Cfd ◽  
Flat Plate Collector ◽  
Work Done

This paper presents the study of fluid flow and heat transfer in solar flat plate collector by using Computational Fluid Dynamics (CFD) which reduces time and cost. In the present paper the computational fluid dynamics (CFD) tool has been used to simulate the solar collector for better understanding the heat transfer capability. 3D model of the collector involving air inlet, the collector is modeled by ANSYS Workbench and the grid was created in ANSYS ICEM. The results were obtained by using ANSYS FLUENT and ANSYS CFX. The objective of this work is to compare theoretically and experimentally work done with the work done by using computational fluid dynamics (CFD) tool with respect to flow and temperature distribution inside the solar collector. The outlet temperature of air is compared with experimental results and there is a good agreement in between them.

Study on Temperature Distribution of a Honeycomb Regenerator during Preheating Process

2012 ◽  
Vol 170-173 ◽  
pp. 2699-2702
Author(s):  
Zhen Min Cui
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
High Temperature ◽  
Temperature Distribution ◽  
Numerical Model ◽  
Three Dimensional ◽  
Combustion Method ◽  
Outlet Temperature ◽  
High Temperature Air Combustion ◽  
Computational Fluid Dynamics Cfd

The HiTAC technology (High Temperature Air Combustion) is a reliable, industry proven combustion method. A three-dimensional numerical model is established which is for unsteady preheating process in honeycomb regenerator. The preheating period of honeycomb was simulated by means of computational fluid dynamics (CFD) software; the outlet temperature, temperature at lengthways of gas, and temperature at lengthways of honeycomb were obtained.

Performance Evaluation of a Photovoltaic Thermal (PVT) System Using Nanofluids

Energies ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 301
Author(s):  
Haedr Abdalha Mahmood Alsalame ◽  
Joo Hee Lee ◽  
Gwi Hyun Lee
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Performance Evaluation ◽  
Conventional Heating ◽  
Outlet Temperature ◽  
Cfd Analysis ◽  
Comparison Study ◽  
Computational Fluid Dynamics Cfd ◽  
Efficiency Comparison ◽  
Heating Medium

In this study, a performance evaluation of a photovoltaic thermal (PVT) system using nanofluids was carried out through an efficiency comparison study using water, CuO-water, and Al2O3-water nanofluids as the heat medium of the PVT system. In addition, a model for computational fluid dynamics (CFD) analysis was established, and the validity of the model was verified by comparing it with the experimental results of the PVT system. Through this, it was confirmed that the outlet temperature of the PVT system using nanofluids can be predicted by applying various conditions. Based on the results, the use of nanofluid as heating medium for the PVT system is proposed to improve the efficiency sufficiently compared to the conventional heating media.

scholarly journals A CFD Simulation on How the Different Sizes of Silica Gel Will Affect the Adsorption Performance of Silica Gel

2012 ◽  
Vol 2012 ◽  
pp. 1-12
Author(s):  
John White
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Silica Gel ◽  
Cfd Simulation ◽  
Cooling System ◽  
Adsorption Rate ◽  
Temperature Heat ◽  
Computational Fluid Dynamics Cfd ◽  
Adsorption Cooling System ◽  
Transfer Flow

The application of computational fluid dynamics (CFD) in the area of porous media and adsorption cooling system is becoming more practical due to the significant improvement in computer power. The results from previous studies have shown that CFD can be useful tool for predicting the water vapour flow pattern, temperature, heat transfer, flow velocity, and adsorption rate. This paper investigates the effect of silica gel granular size on the water adsorption rate using computational fluid dynamics.

scholarly journals CFD Application on Shell and Double Concentric Tube Heat Exchanger

2019 ◽  
Vol 25 (2) ◽  
pp. 136-150
Author(s):  
Basma Abbas Abdulmajeed ◽  
Hawraa Riyadh Jawad
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Heat Exchanger ◽  
Cold Water ◽  
Percentage Error ◽  
Outlet Temperature ◽  
Discrete Elements ◽  
Tube Heat Exchanger ◽  
Heat Exchanger Design ◽  
Solid Works

This work is concerned with the design and performance evaluation of a shell and double concentric tubes heat exchanger using Solid Works and ANSY (Computational Fluid Dynamics). Computational fluid dynamics technique which is a computer-based analysis is used to simulate the heat exchanger involving fluid flow, heat transfer. CFD resolve the entire heat exchanger in discrete elements to find: (1) the temperature gradients, (2) pressure distribution, and (3) velocity vectors.  The RNG k-ε model of turbulence is used to determining the accurate results from CFD. The heat exchanger design for this work consisted of a shell and eight double concentric tubes. The number of inlets are three and that of outlets are also three for all the fluids that pass through the heat exchanger. A comparison was made for the numerical and experimental results and it was found that the percentage error for the hot oil outlet temperature was (6.8%) and the percentage error was (- 21%) for cold water outlet temperature.  

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