The Dependence of Some Thermodynamic Characteristics Upon Initial Spatial-Energy Parameters of Free Atoms

2015 ◽  
pp. 59-75
Author(s):  
G Korablev ◽  
N Korableva ◽  
G Zaikov
Keyword(s):  
Thermodynamic Characteristics ◽  
Energy Parameters ◽  
Free Atoms

scholarly journals Power Plants Based on a Steam Drive with a Working Body Closed Circulation

2021 ◽  
Vol 15 (1) ◽  
pp. 71-77
Author(s):  
V. A. Mayorov ◽  
V. F. Shcherbakov
Keyword(s):  
Power Plant ◽  
Low Temperature ◽  
Power Plants ◽  
Thermodynamic Characteristics ◽  
Steam Engine ◽  
Prototype Model ◽  
Aggregation State ◽  
Energy Parameters ◽  
Temperature Heat ◽  
Heat Carriers

The authors investigated the heat carriers thermodynamic characteristics and the power plant structural components, which ensured the efficient conversion of thermal energy into mechanical and electrical energy.(Research purpose) To conduct modeling for calculating the structure manufacturing technology and studying the power plant characteristics based on a steam engine with given energy parameters.(Materials and methods) The authors carried out mathematical modeling based on the heat and mass transfer laws. To create a prototype model of a steam engine, the recuperation principle based on the “liquid–vapor–liquid” cycle with the use of low-temperature heat carriers was used.(Results and discussion) The authors showed that double transformation of the aggregation state of the working body was much more efficient than its heating. They calculated the characteristics connecting the energy processes of low-temperature heat carriers vaporization (freon R-134a) in the radiator and engine. They revealed dependencies: the radiator heating time from 30 degrees Celsius (ambient temperature) to 100 degrees (maximum operating temperature) at different powers of the heating source (3; 4; 5 kilowatts); density and average density of steam in the radiator from temperature; the steam engine power and the freon steam consumption from the pressure of 0-3.97 megapascals.(Conclusions) The authors determined that the working steam amount, proportional to its density at a temperature of 90 degrees and a pressure of 3.6 megapascals, was 4.75 times less than the liquid freon amount, proportional to its density, at 100 degrees Celsius and a pressure of 3.97 megapascals, the working steam amount was 2 times less than liquid freon. They revealed a limited range of operating temperatures in a steam engine. It was proved that these calculation methods and characteristics determined the structural and energy parameters of the developed power plants based on a steam engine.

ABOUT HEAT CAPACITY OF TITANIUM CARBIDE TiCx

2019 ◽  
pp. 56-66
Author(s):  
I. Khidirov ◽  
V. V. Getmanskiy ◽  
A. S. Parpiev ◽  
Sh. A. Makhmudov
Keyword(s):  
Heat Capacity ◽  
High Temperature ◽  
Titanium Carbide ◽  
Temperature Dependence ◽  
Carbon Concentration ◽  
Room Temperature ◽  
Thermodynamic Characteristics ◽  
Liquid Nitrogen Temperature ◽  
Analysis Data ◽  
Thermal Excitation

This work relates to the field of thermophysical parameters of refractory interstitial alloys. The isochoric heat capacity of cubic titanium carbide TiCx has been calculated within the Debye approximation in the carbon concentration  range x = 0.70–0.97 at room temperature (300 K) and at liquid nitrogen temperature (80 K) through the Debye temperature established on the basis of neutron diffraction analysis data. It has been found out that at room temperature with decrease of carbon concentration the heat capacity significantly increases from 29.40 J/mol·K to 34.20 J/mol·K, and at T = 80 K – from 3.08 J/mol·K to 8.20 J/mol·K. The work analyzes the literature data and gives the results of the evaluation of the high-temperature dependence of the heat capacity СV of the cubic titanium carbide TiC0.97 based on the data of neutron structural analysis. It has been proposed to amend in the Neumann–Kopp formula to describe the high-temperature dependence of the titanium carbide heat capacity. After the amendment, the Neumann–Kopp formula describes the results of well-known experiments on the high-temperature dependence of the heat capacity of the titanium carbide TiCx. The proposed formula takes into account the degree of thermal excitation (a quantized number) that increases in steps with increasing temperature.The results allow us to predict the thermodynamic characteristics of titanium carbide in the temperature range of 300–3000 K and can be useful for materials scientists.

Hydrocarbon Fuels: Gas-Dynamic and Energy Parameters of Detonation

2020 ◽  
Vol 56 (6) ◽  
pp. 655-669
Author(s):  
A. A. Vasil’ev ◽  
V. A. Vasil’ev
Keyword(s):  
Hydrocarbon Fuels ◽  
Energy Parameters ◽  
Gas Dynamic

Study of potential curves by UHF type methods. CH4 molecule and its dissociation products

1986 ◽  
Vol 51 (4) ◽  
pp. 731-737
Author(s):  
Viliam Klimo ◽  
Jozef Tiňo
Keyword(s):  
Experimental Data ◽  
Quantum Chemistry ◽  
High Energy ◽  
Basis Set ◽  
Electronic Correlation ◽  
Exact Methods ◽  
Energy Parameters ◽  
Bond Functions ◽  
The Individual ◽  
Potential Curves

Geometry and energy parameters of the individual dissociation intermediate steps of CH4 molecule, parameters of the barrier to linearity and singlet-triplet separation of the CH2 molecule have been calculated by means of the UMP method in the minimum basis set augmented with the bond functions. The results agree well with experimental data except for the geometry of CH2(1A1) and relatively high energy values of CH(2II) and CH2(1A1) where the existence of two UHF solutions indicates a necessity of description of the electronic correlation by more exact methods of quantum chemistry.

Energy Parameters of Ore-Forming Deep Fluid Systems

2018 ◽  
Vol 481 (1) ◽  
pp. 877-878
Author(s):  
F. A. Letnikov ◽  
B. S. Danilov ◽  
A. F. Letnikova
Keyword(s):  
Energy Parameters ◽  
Fluid Systems ◽  
Deep Fluid

scholarly journals Power-Oriented Monitoring of Clock Signals in FPGA Systems for Critical Application

Sensors ◽  
2021 ◽  
Vol 21 (3) ◽  
pp. 792
Author(s):  
Oleksandr Drozd ◽  
Grzegorz Nowakowski ◽  
Anatoliy Sachenko ◽  
Viktor Antoniuk ◽  
Volodymyr Kochan ◽  
...  
Keyword(s):  
Power Consumption ◽  
Computer Aided Design ◽  
Computer Systems ◽  
Energy Parameter ◽  
Online Testing ◽  
Thermal Monitoring ◽  
Energy Parameters ◽  
Current Consumption ◽  
Computer Aided ◽  
Aided Design

This paper presents a power-oriented monitoring of clock signals that is designed to avoid synchronization failure in computer systems such as FPGAs. The proposed design reduces power consumption and increases the power-oriented checkability in FPGA systems. These advantages are due to improvements in the evaluation and measurement of corresponding energy parameters. Energy parameter orientation has proved to be a good solution for detecting a synchronization failure that blocks logic monitoring circuits. Key advantages lay in the possibility to detect a synchronization failure hidden in safety-related systems by using traditional online testing that is based on logical checkability. Two main types of power-oriented monitoring are considered: detecting a synchronization failure based on the consumption and the dissipation of power, which uses temperature and current consumption sensors, respectively. The experiments are performed on real FPGA systems with the controlled synchronization disconnection and the use of the computer-aided design (CAD) utility to estimate the decreasing values of the energy parameters. The results demonstrate the limited checkability of FPGA systems when using the thermal monitoring of clock signals and success in monitoring by the consumption current.

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