Modeling and Energy Consumption of Unilateral Heating Process of Flat Wood Details

Nencho Deliiski; Neno Trichkov; Dimitar Angelski; Ladislav Dzurenda

doi:10.5552/drind.2016.1518

Design features of thermal furnace with a drum mechanism for blanks transportation

Izvestiya Ferrous Metallurgy ◽

10.17073/0368-0797-2021-2-89-94 ◽

2021 ◽

Vol 64 (2) ◽

pp. 89-94

Author(s):

N. A. Cheremiskina ◽

N. V. Shchukina ◽

N. B. Loshkarev ◽

V. V. Lavrov

Keyword(s):

Energy Efficiency ◽

Energy Consumption ◽

Specific Energy Consumption ◽

Developed Countries ◽

High Energy ◽

Flow Diagram ◽

Heating Process ◽

Specific Process ◽

Technical Parameters ◽

Improve Energy Efficiency

One of the most energy-intensive industries is ferrous metallurgy. The metallurgical sector in industrially developed countries is reducing its specific energy consumption per one ton of products by approximately 1.0 – 1.5 % per annum. In Russia, obsolete technology is the main reason for the high-energy intensity of industrial product. Energy saving in industrial production is associated with production technology and the scope of fuel and energy resources consumption. Therefore, ways to improve energy efficiency focus on reducing energy consumption of any kind during a specific process in a specific process or thermal unit. Ensuring the economical operation of furnace units requires detailed preliminary and verification analyses, upgrading and introduction of state-of-the-art equipment. The study presents a flow diagram and features of thermal operation of a new drum-type chamber furnace for heating metal products for quenching. The technical parameters of the furnace, the results of the thermo-technical analysis, the heat balance and the specific fuel consumption as applicable to the created design are also presented. The flow diagram of the furnace has significant advantages in terms of the energy efficiency of fuel as compared to the roller and conveyor methods of metal transportation. Placing blanks on the drum significantly reduces the complexity of their transportation. Thanks to its small length the proposed design is compact and easy to place in a workshop. The use of a recuperative fuel burning device allows the efficient use of the heat of waste gases in the heating process. The proposed design and method of products transportation in the furnace working space can be used for the heat treatment of bars, pipes, strips, as well as rolled steel of various shapes.

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Effects analysis on optimal microwave energy consumption in the heating process of composite regeneration for the diesel particulate filter

Applied Energy ◽

10.1016/j.apenergy.2019.113736 ◽

2019 ◽

Vol 254 ◽

pp. 113736 ◽

Cited By ~ 26

Author(s):

Jiaqiang E ◽

Xiaohuan Zhao ◽

Guanlin Liu ◽

Bin Zhang ◽

Qingsong Zuo ◽

...

Keyword(s):

Energy Consumption ◽

Diesel Particulate Filter ◽

Microwave Energy ◽

Particulate Filter ◽

Heating Process ◽

Diesel Particulate

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The Probability Distribution Modeling of Surface Heat Flux Density on Metal Material

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.738.42 ◽

2013 ◽

Vol 738 ◽

pp. 42-45

Author(s):

Cheng Zhi Yang ◽

Li Zhou

Keyword(s):

Heat Flux ◽

Energy Consumption ◽

Flux Density ◽

Surface Heat Flux ◽

Heat Flux Density ◽

New Technology ◽

Surface Heat ◽

Heating Process ◽

Metal Material ◽

Flux Density Distribution

In order to get the energy consumption relationship in the heating process of metal material, the probability and statistics law between the temperature distribution and surface heat flux density of heating metal material is established in this paper. Moreover the surface heat flux density distribution of heating metal material is used to associate with its energy consumption. And it builds a new technology method for saving energy control decisions.

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MODELING OF THE DYNAMIC BEHAVIOUR AND ENERGY CONSUMPTION OF THE HEATING PROCESS OF WOODEN HOUSES

IFAC Proceedings Volumes ◽

10.3182/20061002-4-bg-4905.00010 ◽

2006 ◽

Vol 39 (19) ◽

pp. 57-62

Author(s):

Nencho Deliiski ◽

Mincho Hadjiski ◽

Kosta Boshnakov

Keyword(s):

Energy Consumption ◽

Dynamic Behaviour ◽

Heating Process

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Microwave Irradiation: Alternative Heating Process for the Synthesis of Biologically Applicable Chromones, Quinolones, and Their Precursors

Molecules ◽

10.3390/molecules26206293 ◽

2021 ◽

Vol 26 (20) ◽

pp. 6293

Author(s):

Hélio M. T. Albuquerque ◽

Diana C. G. A. Pinto ◽

Artur M. S. Silva

Keyword(s):

Energy Consumption ◽

Microwave Irradiation ◽

Organic Synthesis ◽

Heterocyclic Compounds ◽

Reaction Times ◽

Heating Process ◽

Research Groups ◽

Heating Source ◽

Microwave Assisted ◽

Solventless Reactions

Microwave irradiation has become a popular heating technique in organic synthesis, mainly due to its short reaction times, solventless reactions, and, sometimes, higher yields. Additionally, microwave irradiation lowers energy consumption and, consequently, is ideal for optimization processes. Moreover, there is evidence that microwave irradiation can improve the regioselectivity and stereoselectivity aspects of vital importance in synthesizing bioactive compounds. These crucial features of microwave irradiation contribute to its inclusion in green chemistry procedures. Since 2003, the use of microwave-assisted organic synthesis has become common in our laboratory, making our group one of the first Portuguese research groups to implement this heating source in organic synthesis. Our achievements in the transformation of heterocyclic compounds, such as (E/Z)-3-styryl-4H-chromen-4-ones, (E)-3-(2-hydroxyphenyl)-4-styryl-1H-pyrazole, (E)-2-(4-arylbut-1-en-3-yn-1-yl)-4H-chromen-4-ones, or (E)-2-[2-(5-aryl-2-methyl-2H-1,2,3-triazol-4-yl)vinyl]-4H-chromen-4-ones, will be discussed in this review, highlighting the benefits of microwave irradiation use in organic synthesis.

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Heating Characteristics of Palm Oil Industry Solid Waste and Plastic Waste Mixture using a Microwave Oven

ASEAN Journal of Chemical Engineering ◽

10.22146/ajche.58503 ◽

2020 ◽

Vol 20 (2) ◽

pp. 174

Author(s):

Novi Caroko ◽

Harwin Saptoadi ◽

Tri Agung Rohmat

Keyword(s):

Energy Consumption ◽

Mass Loss ◽

Solid Waste ◽

Heating Rate ◽

Palm Oil ◽

Loss Rate ◽

Mass Loss Rate ◽

Heating Process ◽

Empty Fruit Bunch ◽

Fixed Carbon

A microwave thermogravimetric analyzer was used to measure the characteristics of a mixture of palm oil solid waste (fiber, shell, and empty fruit bunch) and polyethylene terephthalate (PET). In the study, the range of palm oil solid waste composition ratios to PET used was 100:0, 75:25, 50:50, 25:75, and 0:100 (by weight). The study included the influence of the quality of raw material on the heating process. The mixture of palm oil solid waste (fiber, shell, and empty fruit bunch) and PET proved to impact the heating rate, mass-loss rate, and energy consumption. Based on the observation, empty fruit bunch-PET mixture had the highest heating rate (average 1.5039oC/s) than shell (average 0.6058oC/s), and fiber (0.9119oC/s) and also had the highest mass-loss rate (average 0.0253 g/s). The highest biomass (shell, empty fruit bunch, and fiber) and PET composition ratio give the highest rate of heating rate (average 1.8264oC/s) and mass-loss rate (average 0.02875 g/s). In addition, the increasing ratio of fixed carbon and material density will impact the increasing heating rate and mass-loss rate and decrease energy consumption. Therefore, fixed carbon and material gaps significantly affect the heating rate.

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Numerical Approach for Computation of the Heat and Heat Flux for Covering of the Emission in the Surrounding Air of Subjected to Unilateral Heating Flat Wood Details before their Bending

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.688.153 ◽

2016 ◽

Vol 688 ◽

pp. 153-159

Author(s):

Nencho Deliiski ◽

Neno Trichkov ◽

Dimitar Angelski ◽

Ladislav Dzurenda

Keyword(s):

Heat Flux ◽

Energy Consumption ◽

Temperature Distribution ◽

Moisture Content ◽

Numerical Solution ◽

Initial Temperature ◽

Numerical Approach ◽

Surrounding Environment ◽

Unilateral Heating

A numerical approach for the computation of the specific (for 1 m2) energy consumption, qe, and the specific heat flux, dqe/dτ, needed for covering of the emission in the surrounding environment of the subjected to unilateral heating flat wood details aimed at their plasticizing and following bending has been suggested. The approach is based on the integration and differentiation of the solutions of a linear model for the calculation of the non-stationary 1D temperature distribution along the thickness of subjected to unilateral heating flat wood details, suggested by the authors earlier.For the numerical solution of the model aimed at the determination of qe and dqe/dτ software program has been prepared, which was input in the calculation environment of Visual Fortran. Using the program, computations have been carried out for the determination of the change in the energy qe and in the flux dqe/dτ, which are consumed by spruce details with an initial temperature of 20 °C, moisture content of 0.15 kg·kg-1, and thicknesses of 6 mm, 8 mm, and 10 mm during their 10 min unilateral heating at temperatures of the heating metal band of 100 °C, 120 °C, and 140 °C and of the surrounding air of 20 °C. The obtained results are graphically presented and analyzed.

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Enhanced Performance of Membrane Distillation Using Surface Heating Process

Membranes ◽

10.3390/membranes11110866 ◽

2021 ◽

Vol 11 (11) ◽

pp. 866

Author(s):

Fei Han ◽

Shuxun Liu ◽

Kang Wang ◽

Xiaoyuan Zhang

Keyword(s):

Energy Consumption ◽

Energy Performance ◽

High Energy ◽

Membrane Distillation ◽

Operating Conditions ◽

Surface Heating ◽

Commercial Application ◽

Heating Process ◽

Temperature Polarization ◽

Vacuum Membrane Distillation

Membrane distillation (MD) is a thermally driven desalination process that has excellent application prospects in seawater desalination or hypersaline wastewater treatment, while severe temperature polarization (TP) and the resulting relatively high energy consumption have become principal challenges limiting the commercial application of MD. Therefore, the design of novel systems to overcome the shortage of conventional MD requires urgent attention. Here, we developed three surface heating vacuum membrane distillation systems, namely, SHVMD-1, SHVMD-2, and SHVMD-3, according to the different positions of the thermal conducting layer in the cell. The distillate flux, TP, and energy performance of these systems under different operating conditions were investigated. All three systems showed stable performance, with a salt rejection >99.98% for 35 g/L NaCl, and the highest flux was close to 9 L/m2·h. The temperature polarization coefficients were higher than unity in SHVMD-2 and SHVMD-3 systems, and the SHVMD-2 system produced the lowest specific energy consumption and the highest thermal efficiency. In addition, we tested the intermittent surface heating process, which can further improve energy performance through reducing specific electrical energy consumption in vacuum membrane distillation. This paper provides a simple and efficient membrane system for the desalination of brines.

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