scholarly journals Analysis of the Selected Parameters of the Thermal Reclaimer

2014 ◽  
Vol 14 (4) ◽  
pp. 67-72 ◽  
Author(s):  
M. Łucarz
Keyword(s):  
Heat Treatment ◽  
Combustion Chamber ◽  
Point Of View ◽  
Consumption Function ◽  
Temperature Changes ◽  
Treatment Processes ◽  
Energy Part ◽  
Gas Consumption ◽  
Recorded Data ◽  
Process Energy

Abstract The investigation results of the influence of the selected parameters of the thermal reclaimer operations on the temperature changes in the combustion chamber and the process energy consumption, are presented in the hereby paper. The analysis of the heat treatment was performed with the application of a fresh foundry sand, since it was assumed that the dominating energy part was used for the grain matrix heating and due to that, the energy used for burning small amounts of organic binder remained on sand grains could be omitted. Thermal treatment processes performed under various conditions were analysed from the point of view of a gas consumption and temperatures obtained in the experimental reclaimer. The recorded data allowed to point out the parameters having essential influence on the process of the quartz matrix heating in the combustion chamber as a gas consumption function.

Accurate Inlet Boundary Conditions to Capture Combustion Chamber and Turbine Coupling With Large-Eddy Simulation

2021 ◽  
Author(s):  
Benjamin Martin ◽  
Florent Duchaine ◽  
Laurent Gicquel ◽  
Nicolas Odier ◽  
Jérôme Dombard
Keyword(s):  
Boundary Conditions ◽  
Combustion Chamber ◽  
Radial Profile ◽  
Point Of View ◽  
Interface Plane ◽  
Fully Integrated ◽  
Integrated Simulation ◽  
Eddy Simulation ◽  
Reconstructed Signal ◽  
Recorded Data

Abstract The coupling between different components of a turbomachinery is becoming more widely studied especially by use of Computational Fluid Dynamics. Such simulations are of particular interest especially at the interface between a combustion chamber and a turbine, for which the prediction of the migration of hotspots generated in the chamber is of paramount importance for performance and life-duration issues. Despite this need for fully integrated simulations, typical turbomachinery simulations however often only consider isolated components with either time-averaged constant value, radial profile or least frequently 2D maps imposed at their inlet boundaries preventing any accurate two-way coupling. The objective of the present study is to investigate available solutions to perform isolated simulations while taking into account the effect of multi-component coupling. Investigations presented in the paper focus on the FACTOR configuration. The fist step of the proposed method is to record conservative variables solved by the LES code at the interface plane between the chamber and the turbine of a reference simulation. Then, using the Spectral Proper Orthogonal Decomposition (SPOD) method, the recorded data is analysed and can be partially reconstructed using different numbers of frequencies. Using the partial reconstructions, it is then possible to replicate a realistic inlet boundary condition for isolated turbine simulations with both velocity and temperature fluctuations, while reducing the storage cost compared to the initial database. The integrated simulation is then compared to the isolated simulations as well as against simulations making use of averaged quantities with or without synthetic turbulence injection at their inlet. The isolated simulations for which the inlet condition is reconstructed with a large number of frequencies show very good agreement with the fully integrated simulation compared to the typical isolated simulation using average quantities at the inlet. As expected, decreasing the number of frequencies in the reconstructed signal deteriorates the accuracy of the resulting signal compared to the full recorded database. However, isolated simulations with a low number of frequencies still perform better than standard boundary conditions, especially from an aero-thermal point of view.

Investigation of the shelf life of fruit yogurts as a function of the treatment of flavoring substances

2021 ◽  
Vol 67 (1) ◽  
pp. 3304-3314
Author(s):  
Viktória Kapcsándi ◽  
Erika Hanczné Lakatos
Keyword(s):  
Heat Treatment ◽  
Microwave Irradiation ◽  
Shelf Life ◽  
Dairy Products ◽  
Viable Count ◽  
Point Of View ◽  
Treatment Processes ◽  
Microbiological Parameters ◽  
Conventional Drying ◽  
Irradiation Technology

Milk and dairy products represent one of the foundations of the human diet because of their valuable ingredients and pleasant sensory properties. The aim of our research was to investigate how different heat treatment processes (microwave irradiation, drying) affect the shelf life of dairy products (yogurt) from a microbiological point of view. In the course of our measurements, the effects of the different heat treatment parameters of the flavoring substances used in the production of the products (apples, bananas) on the microbiological properties of the products and, thus, on their shelf life were investigated. In our experiments, conventional drying (55 °C, 24 hours) and microwave irradiation technology (800 W, 55 °C, 10 min) were used as treatment forms of the additives. Comparisons were made in terms of microbiological parameters (total viable count, yeast/mold count and E. coli/coliform count). Based on our results, we believe that the drying process can ensure microbiological safety in food production if the air circulating in the equipment has adequate hygienic properties. The microwave irradiation technology can be used successfully to inhibit microbes in foods, in this case fruits. However, the same treatment parameters cannot be applied to different fruits.

scholarly journals Adatgyűjtés, adatelemzés hőkezelési folyamat modellezéséhez

2010 ◽  
Vol 5 (1-2) ◽  
pp. 234-238
Author(s):  
Zoltán Fabulya
Keyword(s):  
Heat Treatment ◽  
Correlation And Regression Analysis ◽  
Treatment Processes ◽  
Gas Utilization ◽  
Multiple Data ◽  
Treatment Equipment ◽  
Gas Consumption ◽  
Canned Meat ◽  
Heat Treatment Equipment

We have been looking for the possibility to build a computer model of costly gas utilization in the course of heat treatment of canned meat. This was necessary for us, as the first part of our long-term research, to be able to accomplish minimized costs by synchro-nizing heat treatment processes running side by side and by production programming to define completion time of the cans. First, because of our multiple data (paper based, text file, image file, Excel file), we have arranged them under a common user interface, while defining the best one from the data with different precision appearing in several sources. Based on the accurate data we did correlation and regression analysis to define the data influencing the gas consumption and to see whether our present data was enough to develop a model. Since the furnace has to ensure the steam supply of the heat treatment equipment and the heating of the buildings too, we defined the gas consumption of the furnace which is dependent on the environmental temperature.

scholarly journals Hőkezelési folyamat modellezési adatainak előkészítése, elemzése húskonzerv-gyártás gázfogyasztásának optimálásához

2009 ◽  
Vol 4 (2) ◽  
pp. 85-90
Author(s):  
Zoltán Fabulya
Keyword(s):  
Heat Treatment ◽  
Correlation And Regression Analysis ◽  
Treatment Processes ◽  
Gas Utilization ◽  
Multiple Data ◽  
Treatment Equipment ◽  
Gas Consumption ◽  
Canned Meat ◽  
Heat Treatment Equipment

We have been looking for the possibility to build a computer model of costly gas utilization in the course of heat treatment of canned meat. This was necessary for us, as the first part of our long-term research, to be able to accomplish minimized costs by synchronizing heat treatment processes running side by side and by production programming to define completion time of the cans. First, because of our multiple data (paper based, text file, image file, Excel file), we have arranged them under a common user interface, while defining the best one from the data with different precision appearing in several sources. Based on the accurate data we did correlation and regression analysis to define the data influencing the gas consumption and to see whether our present data was enough to develop a model. Since the furnace has to ensure the steam supply of the heat treatment equipment and the heating of the buildings too, we defined the gas consumption of the furnace which is dependent on the environmental temperature.

scholarly journals Application of Electrolytic Plasma Process in Surface Improvement of Metals: A Review

2020 ◽  
Vol 9 (3) ◽  
pp. 1249-1262
Keyword(s):  
Heat Treatment ◽  
Surface Engineering ◽  
Treatment Process ◽  
Research Work ◽  
Basic Mechanism ◽  
Point Of View ◽  
Heat Treatment Process ◽  
Plasma Process ◽  
Treatment Processes ◽  
Surface Improvement

Electrolytic plasma heat treatment is becoming a popular heat treatment process in the field of surface engineering. In this paper, research data from different research works have been analyzed. The basic mechanism of the electrolytic plasma heat treatment process is discussed along with its scope in the industry. The review is done to extend the research work of this novel process and its scope from the industrial point of view. The study will explore the electrolytic plasma process to target industrial benefits and to attract the researchers for improving the various aspects of the process. Different types of electrolytic plasma treatment have been discussed to show the capabilities of the process for improving surface properties of different metals. It is found that the treatment is less time consuming, economical, eco-friendly, and dynamic as compared to the existing heat treatment processes. Its dynamic ability makes it possible to perform carburizing, nitriding, coating, cleaning, polishing, and hardening operations in the same experimental setup with little modification.

INFLUENCE THE QUENCHING AND TEMPERING ON THE MICROSTRUCTURE, MECHANICAL PROPERTIES AND SURFACE ROUGHNESS, OF MEDIUM CARBON STEEL

2018 ◽  
Vol 18 (1) ◽  
pp. 125-135
Author(s):  
Sattar H A Alfatlawi
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Surface Roughness ◽  
Carbon Steel ◽  
Cold Water ◽  
Medium Carbon Steel ◽  
Medium Carbon ◽  
Heating And Cooling ◽  
Treatment Processes ◽  
Quenching And Tempering

One of ways to improve properties of materials without changing the product shape toobtain the desired engineering applications is heating and cooling under effect of controlledsequence of heat treatment. The main aim of this study was to investigate the effect ofheating and cooling on the surface roughness, microstructure and some selected propertiessuch as the hardness and impact strength of Medium Carbon Steel which treated at differenttypes of heat treatment processes. Heat treatment achieved in this work was respectively,heating, quenching and tempering. The specimens were heated to 850°C and left for 45minutes inside the furnace as a holding time at that temperature, then quenching process wasperformed in four types of quenching media (still air, cold water (2°C), oil and polymersolution), respectively. Thereafter, the samples were tempered at 200°C, 400°C, and 600°Cwith one hour as a soaking time for each temperature, then were all cooled by still air. Whenthe heat treatment process was completed, the surface roughness, hardness, impact strengthand microstructure tests were performed. The results showed a change and clearimprovement of surface roughness, mechanical properties and microstructure afterquenching was achieved, as well as the change that took place due to the increasingtoughness and ductility by reducing of brittleness of samples.

Effect of Two-step Heat Treatment Processes on the Formation of Protein Particles and Oil Droplets in Soymilk

2020 ◽  
Vol 26 (3) ◽  
pp. 445-450
Author(s):  
Makoto Shimoyamada ◽  
Hironori Shikano ◽  
Shingo Mogami ◽  
Makoto Kanauchi ◽  
Hayato Masuda ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Oil Droplets ◽  
Treatment Processes ◽  
Protein Particles ◽  
Step Heat Treatment

EFFECT ON HARDNESS and MICRO STRUCTURAL BEHAVIOUR OF TOOL STEEL AFTER HEAT TREATMENT PROCESS

2017 ◽  
Vol 4 (24) ◽  
Author(s):  
Karanbir Singh ◽  
Aditya Chhabra ◽  
Vaibhav Kapoor ◽  
Vaibhav Kapoor
Keyword(s):  
Heat Treatment ◽  
Empirical Study ◽  
Tool Steel ◽  
Treatment Process ◽  
Heat Treatment Process ◽  
Structural Behaviour ◽  
Treatment Processes ◽  
En 31

This study is conducted to analyze the effect on the Hardness and Micro Structural Behaviour of three Sample Grades of Tool Steel i.e. EN-31, EN-8, and D3 after Heat Treatment Processes Such As Annealing, Normalizing, and Hardening and Tempering. The purpose of Selecting Tool Steel is Because Tool Steel is Mostly Used in the Manufacturing Industry.This study is based upon the empirical study which means it is derived from experiment and observation rather than theory.

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