Specific heat, polarization and heat conduction in microwave heating systems: A nonequilibrium thermodynamic point of view

2006 ◽  
Vol 54 (7) ◽  
pp. 1843-1849 ◽  
Author(s):  
Paolo Bergese
Keyword(s):  
Heat Conduction ◽  
Specific Heat ◽  
Microwave Heating ◽  
Nonequilibrium Thermodynamic ◽  
Point Of View ◽  
Heating Systems

scholarly journals Theories and heat pulse experiments of non-Fourier heat conduction

2016 ◽  
Vol 7 (2) ◽  
pp. 150-166 ◽  
Author(s):  
Péter Ván
Keyword(s):  
Heat Conduction ◽  
Heat Pulse ◽  
Theoretical Background ◽  
Point Of View ◽  
Experimental Basis ◽  
Equilibrium Thermodynamics ◽  
Fourier Heat Conduction ◽  
Non Equilibrium

Abstract The experimental basis and theoretical background of non-Fourier heat conduction is shortly reviewed from the point of view of non-equilibrium thermodynamics. The performance of different theories is compared in case of heat pulse experiments.

Methods of temperature measurement in microwave heating technologies

2021 ◽  
pp. 20-28
Author(s):  
Boris A. Lapshinov
Keyword(s):  
Temperature Measurement ◽  
Microwave Heating ◽  
Microwave Radiation ◽  
Electromagnetic Fields ◽  
Optical Measurement ◽  
Measurement Methods ◽  
Heating Systems ◽  
Measurement Systems ◽  
Processed Material ◽  
Spectral Pyrometry

In industrial technological processes associated with the heating of the processed material by microwave radiation, it is necessary to measure the temperatures of objects. Methods for measuring temperatures in the fields of technology using microwave heating systems are considered. The main possibilities, disadvantages and limitations of the used contact and non-contact (optical) measurement methods are determined. The requirements for temperature measurement systems under conditions of exposure to strong electromagnetic fields are listed. The possibilities of the spectral pyrometry method are especially noted.

scholarly journals Development of Technology for Processing Oil Sludge with Application of Super High Frequency Electromagnetic Fields

2020 ◽  
Author(s):  
Julia Tagiryanovna Harisova ◽  
Rail Idiatovich Saitov ◽  
Rinat Gazizyanovich Abdeev
Keyword(s):  
Microwave Heating ◽  
Electromagnetic Fields ◽  
Chemical Properties ◽  
Point Of View ◽  
Oil Sludge ◽  
Special Equipment ◽  
Processing Technologies ◽  
Oil Companies ◽  
Oil Emulsions ◽  
Physical And Chemical

This article considers the problem of processing and disposing of oil sludge of various origins. Large oil companies are concerned about the problem of incomplete processing of oil sludge. The most hazardous from an environmental point of view include oil sludge formed at all stages of oil production, transportation and refining. In recent years, oil-producing enterprises have introduced various technological solutions aimed at waste management into production, but there is no single method for processing oil sludge for the purpose of neutralization and disposal. All known oil sludge processing technologies by processing methods can be divided into the following groups: thermal - burning in open barns, furnaces of various types, obtaining bitumen residues; physical - burial in special cemeteries, separation in a centrifugal field, vacuum filtration and filtration under pressure; physical and chemical - the use of specially selected reagents that change the physical and chemical properties, followed by processing on special equipment; and biological - microbiological decomposition in the soil directly in storage, biothermal decomposition. Each of them, while having certain advantages, also has its drawbacks. For over 50 years, microwave heating technology has been used in industry. To present the advantages of this method, one needs to turn to the theory of microwave heating. Keywords: oil sludge, oil waste, influence of electromagnetic fields, water-in-oil emulsions

The amorphous nature of C60 hard carbon manifested in its specific heat, sound velocity and heat conduction

2002 ◽  
Vol 14 (25) ◽  
pp. 6403-6412 ◽  
Author(s):  
K Biljakovi$cacute$ ◽  
M Kozlov ◽  
D Stare$macr$sini$cacute$ ◽  
M Saint-Paul
Keyword(s):  
Heat Conduction ◽  
Specific Heat ◽  
Sound Velocity ◽  
Hard Carbon ◽  
Amorphous Nature

scholarly journals District heating simulation in the aspect of heat supply safety

2018 ◽  
Vol 45 ◽  
pp. 00005 ◽  
Author(s):  
Bożena Babiarz ◽  
Paweł Kut
Keyword(s):  
District Heating ◽  
Heating System ◽  
Point Of View ◽  
Simulation Methods ◽  
District Heating System ◽  
Heating Systems ◽  
Network Failure ◽  
State Security ◽  
Wide Range ◽  
Heating Networks

District heating systems as strategic objects from the point of view of state security must ensure reliability and security in supply of heat to their customers [1, 2]. Thanks to computer simulation methods, district heating companies can analyse the operation of the heating networks at the design and operation stage. Computer simulations also offer a wide range of possibilities in the aspect of optimization of the district heating operation as well as prediction and analysis of network failure effects [3-6]. The paper concerns the simulation of a district heating network. The methods for the simulation of heating networks were characterized and simulations of district heating system were carried out. The effects of the failure were analysed at different values of outside temperatures and for different durations of failure. The value of compensation for undelivered heat was also determined. Simulations were carried out for an actual district heating system located in Rzeszow.

Formulation for Continuous Vulcanization in Microwave Heating Systems

1971 ◽  
Vol 44 (1) ◽  
pp. 294-306 ◽  
Author(s):  
J. Ippen
Keyword(s):  
Microwave Heating ◽  
Continuous Process ◽  
Heating Systems ◽  
Rubber Industry ◽  
Microwave Curing ◽  
Hot Air ◽  
New Development ◽  
Curing Method

Abstract For a number of years the rubber industry has been trying to make its processes as continuous as possible. Techniques which dispense with interruptions are particularly desirable in the production of strip and hose, for extrusion is a continuous process whose interruption for the purpose of enabling the goods to be cured is both illogical and unsatisfactory. Several continuous vulcanization methods, such as the use of hot air and the liquid curing method, are receiving attention. A new development in this field is the use of microwave for vulcanization. Microwave curing is a valuable supplement to other continuous vulcanization methods, in comparison with which it offers advantages in some respects.

scholarly journals Analysis and Optimization of Dual-Heating System Costs

2019 ◽  
Vol 19 (2) ◽  
pp. 48-55
Author(s):  
L. Năstase ◽  
H. Andrei ◽  
E. Lungu ◽  
Veronica Dulea ◽  
E. Diaconu
Keyword(s):  
Social Life ◽  
Cost Optimization ◽  
Electric Heating ◽  
Heating System ◽  
Point Of View ◽  
Monitoring And Control ◽  
Global Energy ◽  
Heating Systems ◽  
Optimization Function ◽  
Comparative Results

AbstractThe importance of the heating systems is given both by the quality brought to the social life and from the point of view of pollution. Environmental pollution, global energy crisis as well as global energy policy and our gas heating systems. This motivating reason for the heating system, in terms of their viability and pollution reductions, is the future. In this article a dual heating system is presented, while an electric heating system and one of the gases, the care is coordinated by a monitoring and control system. The operating strategy of the two systems is dictated by an algorithm and a cost optimization function. The use of a dual heating system is the result of comparative results regarding the measurement of the measures and the simulation of the algorithm.

scholarly journals Study on Thermal Comfort in Industrial Buildings, Heated by Radiation

2021 ◽  
Vol 1203 (2) ◽  
pp. 022089
Author(s):  
Alexandru Filipovici ◽  
Sanda Mirela Ţoropoc ◽  
Marius Adam ◽  
Daniela Rusen ◽  
Danut Tokar ◽  
...  
Keyword(s):  
Optimal Solution ◽  
Heating System ◽  
High Energy ◽  
Point Of View ◽  
Indoor Climate ◽  
Technical Literature ◽  
Heating Systems ◽  
Industrial Buildings ◽  
Very High Energy ◽  
Economical System

Abstract This paper is focused on a study between different heating systems commonly used in industrial installations. Industrial heating systems generally raise difficult problems in choosing the most economical system. If several solutions technically meet the requirements of the indoor climate, in terms of energy efficiency we must focus on the optimal solution. The study was conducted to choose the optimal heating solution for an industrial hall, from the point of view of evaluating the efficiency of the installation of an exhaust gas recirculation equipment. The heating of industrial premises generally raises difficult problems due to the diversity of the types of buildings encountered, the variety of activities carried out and the need to choose the most economical system, both in terms of investment and operation. The radiation heating system using natural gas offers the solution of this problem, in situations where the classic heating systems (hot air heating or static bodies) cannot ensure optimal indoor conditions (in the sense that they do not achieve a relatively uniform temperature in the heated space, cause drafts and have low yields). For spaces with a high height (over 4m) these systems can only be considered satisfactory in the case of general heating with very high energy consumption. From the study performed, but also from the specialized technical literature, it is concluded that these systems offer an energy saving, compared to the classical systems.

The magnetocaloric effect of a paramagnetic salt from the point of view of Tsallis thermostatistics

2019 ◽  
Vol 33 (03) ◽  
pp. 1950024
Author(s):  
Isaías G. de Oliveira ◽  
Moisés M. de Araújo ◽  
Everton M. C. Abreu ◽  
M. J. Neves
Keyword(s):  
Specific Heat ◽  
Magnetocaloric Effect ◽  
Internal Energy ◽  
Threshold Value ◽  
Point Of View ◽  
Total Heat ◽  
Level Model ◽  
Paramagnetic Salt ◽  
Two Level Model

In this work, we have studied the magnetocaloric effect (MCE) of a paramagnetic salt under the view of the Tsallis thermostatistics formalism. In order to model the paramagnetic salt we have used the simple two-level model. Within this model, it is possible to realize the role of the Tsallis parameter q for all thermodynamics variables calculated here, i.e. the internal energy, the specific heat, the entropy, and the magnetocaloric potential. The main result presented in this work is the relation between the total heat related to the MCE and the q-parameter of the Tsallis theory. There is a threshold value of q where, above this value, the total heat change is constant for all q while below this value, there is a quick decreasing.

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