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Journal articles on the topic 'Heat balance diagram'

Author: Grafiati

Published: 4 June 2021

Last updated: 9 February 2022

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1

KAMIMURA, Seiji, and Shingo HOSHINO. "Design heat load for snow-melting facilities-Heat balance model and heat load diagram-." Journal of the Japanese Society of Snow and Ice 66, no. 6 (2004): 677–92. http://dx.doi.org/10.5331/seppyo.66.677.

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Muñoz, Ricardo C. "Combined Diagram: A Graphical Representation of Combination Evaporation Rates." Journal of Hydrometeorology 13, no. 4 (2012): 1389–95. http://dx.doi.org/10.1175/jhm-d-12-05.1.

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Abstract Combination methods estimate the partition of sensible and latent heat fluxes at the surface by combining the surface energy balance equation with the transfer equations for temperature and water vapor in the atmospheric surface layer. This paper presents a diagram that graphically depicts the main assumptions and steps of the method. Potential, apparent potential, and actual evaporation rates are visually explained with the diagram. Using a linearized saturation water content relation, the diagram permits the derivation of many of the combination evaporation results by means of geome

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3

Kutniy, Bogdan, and Bogdan Novakh. "Calculation of phace change heat accumulator in complex of energy efficient ventilation system." ACADEMIC JOURNAL Series: Industrial Machine Building, Civil Engineering 1, no. 52 (2019): 191–96. http://dx.doi.org/10.26906/znp.2019.52.1697.

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The classification of the main seasonal heat energy storage batteries is given, and the modern circuit diagram of the phaseshift battery as part of the system with a heat pump and a solar collector is considered. The disadvantage of water heaters istheir large volume in most cases. By utilizing the accumulated latent heat of substances, a significant reduction in capitalcosts is achieved. The possibility of creating energy-saving ventilation systems with the use of a seasonal heat accumulatorworking on phase transformations of heat-accumulating material is considered. The linear stationary mat

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Kurnakova, Natalia Yu, Andrei V. Nuzhdin, and Alexander A. Volkhonsky. "ON THE POSSIBILITY TO IMPROVE THE ENERGY EFFICIENCY OF THE CHP HEAT BALANCE DIAGRAM USING A HEAT PUMP." Proceedings of Irkutsk State Technical University 22, no. 7 (2018): 114–22. http://dx.doi.org/10.21285/1814-3520-2018-7-114-122.

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МАКСИМОВ, Н. М. "HEAT BALANCE OF WAX HEATING UNITS." VESTNIK RIAZANSKOGO GOSUDARSTVENNOGO AGROTEHNOLOGICHESKOGO UNIVERSITETA IM P A KOSTYCHEVA, no. 1(49) (March 30, 2021): 142–49. http://dx.doi.org/10.36508/rsatu.2021.49.1.021.

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Проблема и цель. Целью проводимых исследований является теоретическое обоснование и практическая реализация технологии производства воска на пасеках. Объект исследования: агрегаты для вытопки воска, включающие парогенератор для выработки перегретого пара и паровую рамочную воскотопку. Необходимость проводимых исследований вызвана дефицитом воска на внутреннем рынке Российской Федерации, а также малой производительностью и эффективностью выпускаемых промышленностью агрегатов для вытопки воска. Сложившаяся ситуация требует разработки усовершенствованной технологии получения пасечного воска с мин

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Esin, S. B., N. N. Trifonov, Yu G. Sukhorukov, et al. "Study of regeneration system of 300 MW power unit based on nondeaerating heat balance diagram at reduced load." Thermal Engineering 62, no. 9 (2015): 621–24. http://dx.doi.org/10.1134/s0040601515090037.

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Nikulina, Olena, Valerii Severyn, Nina Kotsiuba, and Anton Bubnov. "SIMULATION OF THERMAL PROCESSES OF A NPP STEAM GENERETOR FOR INFORMATION TECHNOLOGY OPTIMIZED CONTROL." Bulletin of National Technical University "KhPI". Series: System Analysis, Control and Information Technologies, no. 1 (5) (July 12, 2021): 56–61. http://dx.doi.org/10.20998/2079-0023.2021.01.09.

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Mathematical models of thermal processes in the form of Cauchy in the state space with relative variables of the steam generator PGV-1000 of the power unit of a nuclear power plant with a nuclear reactor VVER-1000 have been developed for the using of models in information technology for optimizing the control of a steam generator. The working thermal processes in the PGV-1000 steam generator associated with the supply of feed water to it from the water treatment system and the coolant from the nuclear reactor and the removal of vapors to the main steam header are considered. The design diagram

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8

He, Zhilong, Dantong Li, Lantian Ji, Xiaolin Wang, and Tao Wang. "Investigation on the Mass Flow Rate of a Refrigerator Compressor Based on the p–V Diagram." Applied Sciences 10, no. 19 (2020): 6650. http://dx.doi.org/10.3390/app10196650.

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The refrigerant mass flow rate of a refrigerator compressor can only be measured by a mass flow meter and heat balance method. This paper focuses on the expansion and compression phase in which the compressor cylinder is closed, and proposes a measurement method of instantaneous mass flow of the refrigerator compressor. The comparison of the experimental pressure variation in the p–V diagram and the theoretical adiabatic process implied that the expansion and compression process of the refrigerator compressor approximated the adiabatic process. Based on the approximations and the experimental

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Ilyin, Roman Albertovich, Nickolai Dmitrievich Shishkin, Ilya Igorevich Konkov, and Aida Abaevna Volkova. "Circuit decisions for heating vegetable oil tanks using thermal pump at Marine Trade Port Olya, JSC in Astrakhan region." Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies 2020, no. 2 (2020): 120–26. http://dx.doi.org/10.24143/2073-1574-2020-2-120-126.

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The paper presents the analysis of the heating system of the vegetable oil tanks at Sea Trade Port Olya, JSC. The heating circuit from the electric boiler is considered. There is described the method of replacing the boiler by a heating system with laying heating networks from the heating station, the disadvantages being identified. An alternative is proposed for replacing traditional methods of heating vegetable oil in tanks by introducing a heat pump that takes low potential energy for its operation from the Bakhtemir River, not far from the facility. The proposed option is quite effective a

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Díaz, J. I., A. Hidalgo, and L. Tello. "Multiple solutions and numerical analysis to the dynamic and stationary models coupling a delayed energy balance model involving latent heat and discontinuous albedo with a deep ocean." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 470, no. 2170 (2014): 20140376. http://dx.doi.org/10.1098/rspa.2014.0376.

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We study a climatologically important interaction of two of the main components of the geophysical system by adding an energy balance model for the averaged atmospheric temperature as dynamic boundary condition to a diagnostic ocean model having an additional spatial dimension. In this work, we give deeper insight than previous papers in the literature, mainly with respect to the 1990 pioneering model by Watts and Morantine. We are taking into consideration the latent heat for the two phase ocean as well as a possible delayed term. Non-uniqueness for the initial boundary value problem, uniquen

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Cheremiskina, N. A., N. V. Shchukina, N. B. Loshkarev, and V. V. Lavrov. "Design features of thermal furnace with a drum mechanism for blanks transportation." Izvestiya. Ferrous Metallurgy 64, no. 2 (2021): 89–94. http://dx.doi.org/10.17073/0368-0797-2021-2-89-94.

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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

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12

Choi, Myung Sik, Han Gil Na, Changhyun Jin, and Kyu Hyoung Lee. "Extended Energy Conservation Law in Alloys: the Absence of Energy Non-Equilibrium." Korean Journal of Metals and Materials 58, no. 8 (2020): 566–72. http://dx.doi.org/10.3365/kjmm.2020.58.8.566.

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Assuming that many of the materials produced in a non-equilibrium state remain unchanged, an extended space–energy conservation law was proposed based on the existing energy conservation law. In the present study, by analyzing the well developed equilibrium binary phase diagram of iron (Fe) – carbon (C), we show that energy non-equilibrium microstructures can appear as a part of the equilibrium between the space energy and the mass energy. The correlation between these two energies is objectively and logically explained via (1) one-to-one correspondences between the equilibrium and non-equilib

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KON’KOV, A. Yu, A. I. TRUNOV, and A. D. GUR’YANOVA. "Method of adjusting fuel equipment of a diesel locomotive by heat release feature under operating conditions." VNIIZHT Scientific Journal 80, no. 1 (2021): 20–29. http://dx.doi.org/10.21780/2223-9731-2021-80-1-20-29.

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Diesel engines supply mechanical power to almost half of the locomotives of the Russian railways. To ensure the passport characteristics of a diesel locomotive during the entire period of operation, periodic adjustment of the fuel supply equipment is required. When adjusting it, it is necessary to ensure the balance of power between the diesel cylinders while not exceeding the protective parameters for the maximum combustion pressure and the temperature of the exhaust gases. This is achieved due to the identity of the cyclic fuel supply through the diesel cylinders and the close correspondence

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14

Sugiyama, Masahiro. "The Moisture Mode in the Quasi-Equilibrium Tropical Circulation Model. Part I: Analysis Based on the Weak Temperature Gradient Approximation." Journal of the Atmospheric Sciences 66, no. 6 (2009): 1507–23. http://dx.doi.org/10.1175/2008jas2690.1.

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Abstract The moisture mode in a simplified version of the quasi-equilibrium tropical circulation model (QTCM) of Neelin and Zeng is analyzed. Perturbation expansion based on the ratio of temperature tendency to adiabatic cooling simplifies the system and dispersion relationship. The weak temperature gradient (WTG) approximation of Sobel, Nilsson, and Polvani naturally emerges as the dynamical balance of the moisture mode. The condition of the expansion can be phrased in terms of the nondimensional wavenumber and is satisfied in the tropics even for the planetary scale. The WTG growth rate equa

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15

Parlyuk, Ekaterina, and Nikolay Bol'shakov. "METHODOLOGY FOR DETERMINING THE MAIN INDICATORS OF THE TEMPERATURE AND DYNAMIC CHARACTERISTICS OF THE COOLING SYSTEM OF AN ENERGY VEHICLE DURING OPERATION." Vestnik of Kazan State Agrarian University 16, no. 2 (2021): 75–79. http://dx.doi.org/10.12737/2073-0462-2021-75-79.

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The efficiency of internal combustion engines of energy facilities operating in the conditions of enterprises of the agro-industrial complex depends on the stability of the thermal regime of the engine. Its provision is entrusted to the cooling system, in this article which is a radiator with a polyurethane core. The temperature regime of the engine operation affecting a number of factors is given and described - these are design parameters (design features of the radiator and the features of the working process of the radiator, taking into account the operating conditions of the tractor) and

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Pang, Yin, Thomas Hammer, Dominik Müller, and Jürgen Karl. "Investigation of Nonthermal Plasma Assisted Charcoal Gasification for Production of Hydrogen-Rich Syngas." Processes 7, no. 2 (2019): 114. http://dx.doi.org/10.3390/pr7020114.

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The motivation of this work is to investigate experimentally the influence of nonthermal plasma (NTP) application on the reaction kinetics of atmospheric pressure steam gasification of charcoal using a thermostatically controlled drop tube reactor. A gliding-arc generator provides about 1 kW electrical power NTP. For comparison thermal gasification is investigated under comparable flow and specific energy input conditions providing additional heat to the steam. Optical temperature measurement 20 cm flow down of the NTP zone is utilized to characterize the specific enthalpy of the reactive flow

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17

Taler, Dawid, Piotr Dzierwa, and Jan Taler. "New method for determining the optimum fluid temperature when heating pressure thick-walled components with openings." E3S Web of Conferences 128 (2019): 01025. http://dx.doi.org/10.1051/e3sconf/201912801025.

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A new approximate method of optimum heating cylindrical pressure elements weakened by openings was proposed. Optimum variations in fluid temperature when heating the pressure component were determined from the condition that the total circumferential stress at the edge of the opening, resulting from the thermal load and pressure is equal to the allowable stress. The allowable stress is determined from the Wöhler fatigue diagram for a given number of start-ups and shutdowns of a power unit from the cold state. Optimum temperature changes are difficult to estimate at the beginning of the heating

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18

Zhu, S., H. S. Ramaswamy, and A. Le Bail. "Calorimetry and Pressure-shift Freezing of Different Food Products." Food Science and Technology International 12, no. 3 (2006): 205–14. http://dx.doi.org/10.1177/1082013206065615.

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Rapid depressurisation can create uniform, small and abundant ice nucleation during pressure-shift freezing (PSF) which can then protect the frozen food structure from cell damage. The amount of depressurisation-formed ice was evaluated using a high-pressure calorimeter for different food products (tylose, potato, salmon, pork and water). Experiments were conducted at an initial pressure of 62, 82, 112, 156, 180 and 196MPa, at temperatures set at −5, −7, −10, −15, −18 and −20°C, respectively (slightly above the phase diagram of water-ice I). Calorimetric thermograms recorded during PSF tests w

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19

Sizova, O. V., A. V. Zhavoronkova, and V. E. Mizonov. "Modeling the process of calculating indicators of thermal efficiency of state district power station equipment." Vestnik IGEU, no. 3 (June 30, 2021): 42–50. http://dx.doi.org/10.17588/2072-2672.2021.3.042-050.

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During the operation of state district power station, it is necessary to calculate the technical and economic performance (TEP) of the equipment operation based on the results of measuring the parameters of heat carrier flows. In particular, such tasks are solved during thermal (balance, functional) tests of heat and power equipment, as well as during the preparation of monthly technical reports of the state district power station on thermal efficiency. Therefore, the urgent task is to develop the model of calculating the indicators of the thermal efficiency of the equipment of the state distr

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20

Huete, César, Antonio L. Sánchez, Forman A. Williams, and Javier Urzay. "Diffusion-flame ignition by shock-wave impingement on a supersonic mixing layer." Journal of Fluid Mechanics 784 (October 30, 2015): 74–108. http://dx.doi.org/10.1017/jfm.2015.585.

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Ignition in a supersonic mixing layer interacting with an oblique shock wave is investigated analytically and numerically under conditions such that the post-shock flow remains supersonic. The study requires consideration of the structure of the post-shock ignition kernel that is found to exist around the point of maximum temperature, which may be located either near the edge of the mixing layer or in its interior, depending on the profiles of the fuel concentration, temperature and Mach number across the mixing layer. The ignition kernel displays a balance between the rates of chemical reacti

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21

Kutasi, Zsuzsanna. "A középkori arab orvoslás alapjai: A vérrendszerek Avicenna leírásában a Kánon első könyvéből egy részlet fordításával." Kaleidoscope history 11, no. 22 (2021): 8–28. http://dx.doi.org/10.17107/kh.2021.22.8-28.

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Based on the knowledge of ancient Greek philosophers, medieval Arabic theoretical anatomy describes the organs, their roles and function as well as their mutual relationships on a philosophical basis wherever there are organs with higher and subordinate roles. According to Ibn Sīnā Abū ‘Alī al-Ḥusayn b. ‘Alī (Avicenna) (370-428 AH or 980-1037 AD), everything in nature is connected with everything else, and the main operator of the body is the immortal divine soul (rūḥ). While breathing, a part of the divine soul enters the lungs, and then the heart as its mixture with blood where 'pneuma' is f

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22

Пугач, Леонид, Leonid Pugach, Павел Куницын, Pavel Kunitsyn, Александр Стребков, and Aleksandr Strebkov. "Automation balance calculations system of recovery feed water at work energy units of thermal power plants." Bulletin of Bryansk state technical university 2015, no. 3 (2015): 40–51. http://dx.doi.org/10.12737/22991.

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The problems of optimizing and automating the process of calculating the thermal schemes steam-turbine plants. The possibility of using different means of software Mathcad for calculation of the energy and mass balance of energy units. Investigated the matrix method for solving equations of heat balance diagrams of steam-turbine plants.

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Omarova, Sabina M., Nadinbeg N. Verdiev, Alibek B. Alkhasov, Ukhumaali G. Magomedbekov, Vasiliy I. Dvoryanchikov, and Dmitry A. Nekrasov. "STABLE TETRAEDR OF LiF-LiCl-Li2SO4-NaCl." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 60, no. 5 (2017): 57. http://dx.doi.org/10.6060/tcct.2017605.5509.

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With differential-thermal method of physicochemical analysis; using the General rules of the projection-thermographic method; the surface was studied of the liquidus stable tetrahedron LiF–LiCl–Li2SO4–NaCl of quaternary mutual system Li;Na//F;Cl;SO4. As a result of researches it was established that the system implements the quadruple eutectic point melting at 410 °C. Increased interest in involvement in the global energy balance of renewable energy sources (RES); encourages research to identify the eutectic salt mixtures capable of accumulating heat energy. Research undertaken with the aim of

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24

Li, Matthew, David Allinson, and Kevin Lomas. "Estimation of building heat transfer coefficients from in-use data." International Journal of Building Pathology and Adaptation 38, no. 1 (2019): 38–50. http://dx.doi.org/10.1108/ijbpa-02-2019-0022.

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Purpose The purpose of this paper is to identify the impact of traditionally unmonitored energy sources and sinks on assessment of the as-built thermal performance of occupied homes. The analysis aims to demonstrate the potential scale of uncertainties introduced in a heat balance estimation of the heat transfer coefficient (HTC) when using in-use monitored data. Design/methodology/approach Energy flows for two UK homes – one a 1930s dwelling with high heat loss, the second a higher-performing 2014-built home – are predicted using the UK Government’s standard assessment procedure (SAP) and vis

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25

Zhongyuan, Bai, and Yu Xinzhi. "Energy Exchange and its Influence Factors on Mountain Glaciers in West China." Annals of Glaciology 6 (1985): 154–57. http://dx.doi.org/10.3189/1985aog6-1-154-157.

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Heat balance studies were carried out during summer ablation periods 1960-1983 by the glacial investigation team of the Chinese Academy of Sciences. The effect of energy exchange on development of mountain glaciers was determined, based on the observation of heat exchange over the glacial surface of various mountainous regions. Relationships between energy transfer and climatic parameters under different climatic regimes and landform conditions are analyzed in detail. It was found that the most important heat source for snow-ice melting is radiation, a contribution amounting to between 59.0% a

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Zhongyuan, Bai, and Yu Xinzhi. "Energy Exchange and its Influence Factors on Mountain Glaciers in West China." Annals of Glaciology 6 (1985): 154–57. http://dx.doi.org/10.1017/s0260305500010223.

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Heat balance studies were carried out during summer ablation periods 1960-1983 by the glacial investigation team of the Chinese Academy of Sciences. The effect of energy exchange on development of mountain glaciers was determined, based on the observation of heat exchange over the glacial surface of various mountainous regions. Relationships between energy transfer and climatic parameters under different climatic regimes and landform conditions are analyzed in detail. It was found that the most important heat source for snow-ice melting is radiation, a contribution amounting to between 59.0% a

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27

Bogdanovic, Veliborka, and Slobodan Samardzic. "The application of the facade thermal insulation systems during the energy conservation remedial measures of the structures being heightened." Facta universitatis - series: Architecture and Civil Engineering 3, no. 1 (2004): 57–68. http://dx.doi.org/10.2298/fuace0401057b.

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Bearing in mind the fact that during the design and construction of the additional stories to the residential buildings the standards about the heat technology in the civil engineering were not met for the entire structure and very often not even for the additional stories of the structure, we deemed that it is necessary to emphasize the possibility of the heat balance improvements through the application of the facade thermal insulation systems on the non-insulated facade walls. That this concept is valid, is supported by the fact that in practice, the aesthetic and functional repairs of the

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Eltayeb, I. A. "Convective instabilities of Maxwell–Cattaneo fluids." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 473, no. 2201 (2017): 20160712. http://dx.doi.org/10.1098/rspa.2016.0712.

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Motivated by the need to understand better the dynamics of non-Fourier fluids, we examine the linear and weakly nonlinear stabilities of a horizontal layer of fluid obeying the Maxwell–Cattaneo relationship of heat flux and temperature using three different forms of the time derivative of the heat flux. Linear stability mode regime diagrams in the parameter plane have been established and used to summarize the linear instabilities. The energy balance of the system is used to identify the mechanism by which the Maxwell–Cattaneo effect (i) introduces overstability, (ii) leads to preferred statio

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Korohodskyi, Volodymyr, Andrii Rogovyi, Oleksandr Voronkov, et al. "Development of a three-zone combustion model for stratified-charge spark-ignition engine." Eastern-European Journal of Enterprise Technologies 2, no. 5 (110) (2021): 46–57. http://dx.doi.org/10.15587/1729-4061.2021.228812.

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A thermodynamic model for calculating the operating process in the cylinder of a spark-ignition engine with internal mixture formation and stratified air-fuel charge based on the volume balance method was developed. The model takes into account the change in the working fluid volume during the piston movement in the cylinder. The equation of volume balance of internal mixture formation processes during direct fuel injection into the engine cylinder was compiled. The equation takes into account the adiabatic change in the volume of the stratified air-fuel charge, consisting of fuel-air mixture

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Surawattanawan, Prakob, and Surasit Polpun. "Dynamic Response Analysis of Start-Up Transient in Air Conditioning System." Applied Mechanics and Materials 423-426 (September 2013): 1577–88. http://dx.doi.org/10.4028/www.scientific.net/amm.423-426.1577.

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Dynamic models of the heating, ventilation and air-conditioning (HVAC) systems in a temperature controlled room are very useful for controller design, commissioning, and fault detection and diagnosis. A transient model is a set of time differential equations in mass, energy and momentum balances. These transient equations contain parameter values for validation. The parameter such as thermal capacitances of the room chamber, heat transfer coefficient of room panel, heat transfer coefficient of evaporator are difficult to determine because they are related to unsteady condition and have to be c

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Shvydkii, V. S., S. P. Kudelin, I. A. Gurin, and V. Yu Noskov. "Development of information modeling system of coal-dust fuel injection into tuyeres of blast furnace." Izvestiya. Ferrous Metallurgy 62, no. 12 (2020): 979–86. http://dx.doi.org/10.17073/0368-0797-2019-12-979-986.

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The article considers a mathematical model of combustion zone of blast furnace working with the use of injection of coal-dust fuel. In this model, two subsystems were identified: 1) subsystem of heating the particles of coal dust and volatiles release in the combustion zone; 2) subsystem of heat exchange and combustion processes in the tuyere. A two-dimensional velocity field of gas in the combustion zone was investigated. The combustion processes are considered as a set of simultaneously developing phenomena of coke burning in a layer, single pieces of coke and particles of coal dust. The mod

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Yoo, Hyo Hyun, So Jung Yune, Sun Ju Im, Bee Sung Kam, and Sang Yeoup Lee. "Heart Rate Variability-Measured Stress and Academic Achievement in Medical Students." Medical Principles and Practice 30, no. 2 (2020): 193–200. http://dx.doi.org/10.1159/000513781.

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<b><i>Objectives:</i></b> Stress can affect learning and memory in students. Previous studies on stress in students were conducted mainly through surveys. We investigated how heart rate variability (HRV)-measured stress is related to academic achievement in medical students during clerkship. <b><i>Subjects and Methods:</i></b> A cross-sectional study was conducted. HRV measurements were performed in 97 third-year medical students during their family medicine clerkship course. Data on written and skilled examination scores of the end of the school

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Mukherjee, H., and J. P. Brill. "Pressure Drop Correlations for Inclined Two-Phase Flow." Journal of Energy Resources Technology 107, no. 4 (1985): 549–54. http://dx.doi.org/10.1115/1.3231233.

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Pressure drop behavior in two-phase inclined flow was studied. For bubble and slug flow, a no-slip friction factor calculated from the Moody diagram was found adequate for friction head loss calculations. In downhill stratified flow, the friction pressure gradient is calculated based on a momentum balance equation for either phase assuming a smooth gas-liquid interface. For this calculation, a prior knowledge of the liquid holdup is needed. For annular-mist flow, a friction factor correlation is presented that is a function of holdup ratio and no-slip Moody friction factor. Results agree well

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Mishchenko, Andrii, and Américo Scotti. "Welding thermal stress diagrams as a means of assessing material proneness to residual stresses." Journal of Materials Science 56, no. 2 (2020): 1694–712. http://dx.doi.org/10.1007/s10853-020-05294-y.

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Abstract In this work, the proposal and appraisal of a method to describe in a quantitative manner the phenomenon of thermal stresses formation in welding at different heat-affected zone (HAZ) regions and under different cooling rates, by means of physical simulation, are explained. Under the denomination of welding thermal stress diagrams (WTSD), initially the concept and experimental arrangements needed to use the idea, based on a Gleeble simulator, are revealed. An approach to determine more realistic thermal cycles (peak temperature and heating/cooling rates) is introduced and applied. The

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Clemens, Helmut, Martin Schloffer, Emanuel Schwaighofer та ін. "Advanced β-Solidifying Titanium Aluminides – Development Status and Perspectives". MRS Proceedings 1516 (2013): 3–16. http://dx.doi.org/10.1557/opl.2012.1654.

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ABSTRACTAfter almost three decades of intensive fundamental research and development activities intermetallic titanium aluminides based on the -TiAl phase have found applications in automotive and aircraft engine industries. The advantages of this class of innovative high-temperature materials are their low density as well as their good strength and creep properties up to 750°C. A drawback, however, is their limited ductility at room temperature, which is reflected by a low plastic strain at fracture. This behavior can be attributed to a limited dislocation movement along with microstructural

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Fialko, M., A. Stepanova, S. Shevchuk, and G. Sbrodova. "COMPREHENSIVE METHODS OF EVALUATION OF EFFICIENCY AND OPTIMIZATION OF HEAT-UTILIZATION SYSTEMS." Industrial Heat Engineering 40, no. 4 (2018): 25–33. http://dx.doi.org/10.31472/ihe.4.2018.04.

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At present, Ukraine has the necessary potential for the implementation of effective energy-saving technologies for heat recovery, and therefore the problem of their development and implementation is relevant for the country's energy sector. The solution of this problem is related to the need for systematic studies of the efficiency of optimization of heat recovery facilities from the standpoint of modern methodological approaches. The paper outlines the main stages in the development of integrated methods for assessing the efficiency and optimization of heat recovery systems based on the princ

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Murog, Igor A., Valery F. Gnido, Elena V. Tinina, Igor A. Ilchuk, and Tatiana A. Asayeva. "Simulation of thermal processes on the electrode of a miniature protective spark gap." Revista de la Universidad del Zulia 12, no. 32 (2021): 127–38. http://dx.doi.org/10.46925//rdluz.32.10.

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The article discusses the issues that arise when determining the temperature in the region of the cathode spot in miniature protective spark gaps. The modeling principle is used to study the temperature field on the spark gap electrode. A mathematical model of the process is compiled on the basis of the balance of power entering the cathode spot and its removal inside the cathode due to thermal conductivity. A numerical solution of the obtained nonlinear heat equation with inhomogeneous boundary conditions by the finite-difference method is presented. The authors compared the found temperature

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Lukanin, Р. V. "Estimation of energy efficiency of kraft pulp production with the exergy increment method." Power engineering: research, equipment, technology 22, no. 2 (2020): 3–11. http://dx.doi.org/10.30724/1998-9903-2020-22-2-3-11.

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This article contains results of exergic analysis of kraft pulping flow chart. The results of exergic balances of main kraft pulping processes such as alkali recovery at recovery boilers, black liquor evaporation, chips cooking, lime decarbonation are considered in details in the article. The analysis of the process flow chart makes it possible to determine the bottlenecks in the use of heat energy and to substantiate principal lines for increasing energy efficiency of the processes under study. A main share of the exergy expended in the existing pulping process is due to alkali recovery in th

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Kujawa, Tomasz, and Władysław Nowak. "The range of application of ORC power plant in power stations fed with low and medium thermal sources." E3S Web of Conferences 70 (2018): 01009. http://dx.doi.org/10.1051/e3sconf/20187001009.

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The work presents the diagrams of the applied power plant solutions with a description of their operation and calculation algorithm. In the latter case, the cycle of thermodynamic transformations of the Rankine cycle presented in the T-s coordinate system was used, which reflects the subsequent transformations occurring in individual devices of the power plant, including the method of determining unit quantities characterizing their operation. The energy balance equations of the evaporator and the heater are presented, which among other things will be the basis for determining the coefficient

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Molina Benavides, Raúl Andrés, Hugo Sánchez- Guerrero, and Alberto Stanislao Atzori. "A conceptual model to describe heat stress in dairy cows from actual to questionable loops." Acta Agronómica 67, no. 1 (2018): 59–64. http://dx.doi.org/10.15446/acag.v67n1.60612.

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Se reconoce que el ambiente térmico es uno de los factores ecológicos más importantes para determinar el crecimiento, el desarrollo y la productividad de animales domésticos con efectos directos e indirectos sobre su fisiología y comportamiento. A pesar de tener una adaptación específica e individual, es muy común que, dentro de las variaciones de temperatura estacionales o diurnas, los animales se enfrenten a situaciones fuera de su zona de confort térmico. Debido al estrés calórico, las vacas lecheras reducen su producción y fertilidad, y por lo tanto, llevan a cabo un aumento en la incidenc

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Bao, Xi Rong, Yue Huang, and Shi Zhang. "A Distributed Motion Algorithm for Mobile Sensor in Hybrid Wireless Sensor Networks." Applied Mechanics and Materials 719-720 (January 2015): 812–17. http://dx.doi.org/10.4028/www.scientific.net/amm.719-720.812.

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Constructing a hybrid wireless sensor networks comprising a mix of static sensors and mobile sensors can achieve a balance between improving coverage and reducing the cost of the network. In order to achieve high network coverage, mobile sensor move from a small to a big size of coverage hole in the hybrid wireless sensor networks. Due to the energy of the mobile sensor is limited, how to reduce the moving distance of the mobile sensor and reduce the energy consumption in the process of moving is a very important issue. This paper proposes a distributed minimum cost matching algorithm (DMMA) t

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Blazy, Rafał, and Mariusz Łysień. "Teaching Spatial Planning Using Elements of Design Thinking as an Example of Heuristic in Urban Planning." Sustainability 13, no. 8 (2021): 4225. http://dx.doi.org/10.3390/su13084225.

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In modern urban analysis, line–nodal connections are often used as a model, diagram or matrix for describing space and its accompanying phenomena. In practice, the search for relationships in space is often nothing but the designation of lines reflecting their physical and nonphysical association by their geometry. Recording the spatial issues of a city constituting a very complex structure on the surface of paper, or on a computer monitor, is an extremely difficult conceptual task. At the heart of Design Thinking is a deep understanding of the relationship between different elements. It can t

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Fomin, D. V., M. A. Barulinа, A. V. Golikov, D. O. Strukov, A. S. German, and A. A. Ogorodnikov. "Three-dimensional inhomogeneous thermal fields of the “Photon-Amur 2.0” payload electronic board developed for nanosatellites." VESTNIK of Samara University. Aerospace and Mechanical Engineering 20, no. 2 (2021): 74–82. http://dx.doi.org/10.18287/2541-7533-2021-20-2-74-82.

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The thermal fields of the Photon-Amur 2.0 payload electronic board developed for nanosatellites were studied. The Photon-Amur 2.0 payload consists of an electronic control board with a casing mounted in a nanosatellite and a remote panel with experimental photovoltaic converters. A modified heat balance method was used for numerical simulation of the thermal fields of the control board and the casing. The constructed model and the obtained results of the numerical simulation were verified by comparison with the thermal diagrams obtained for the Photon-Amur 2.0 electronic board under normal ope

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Masood, S., L. Chartier, and J. Yoon. "LO24: The checklist for head injury management evaluation study (CHIMES): a cQI initiative to reduce imaging utilization for head injuries in the emergency department." CJEM 20, S1 (2018): S15. http://dx.doi.org/10.1017/cem.2018.86.

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Introduction: Over 1 million patients with head injuries (HIs) are seen every year at emergency departments (EDs) in North America, with over 90% being minor HIs. Over-utilization of computed tomography (CT) scans in these patients results in unnecessary exposure to radiation and increases health-care resource utilization. Using recommendations from the Choosing Wisely Campaign (CWC) and quality improvement (QI) methodology, we developed a local initiative targeting this issue. Our aim was to reduce the CT scan rate for patients presenting with HIs by 10% over a 6-month period at two academic

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Dibyo, Sukmanto, Endiah Puji Hastuti, and Ign Djoko Irianto. "ANALISIS DESAIN PROSES SISTEM PENDINGIN PADA REAKTOR RISET INOVATIF 50 MW." JURNAL TEKNOLOGI REAKTOR NUKLIR TRI DASA MEGA 17, no. 1 (2015): 19. http://dx.doi.org/10.17146/tdm.2015.17.1.2235.

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Reaktor Riset Inovatif (RRI) merupakan jenis MTR (Material Testing Reactor) yang dipersiapkan ke depan sebagai desain reaktor baru. Daya RRI telah ditetapkan dari perhitungan neutronik dan termohidrolika teras yaitu 50 MW termal. Reaktor bertekanan 8 kgf/cm2 dan laju aliran massa pendingin primer 900 kg/s. Tantangan yang penting dalam menindak lanjuti desain reaktor ini adalah analisis desain pada sistem pendingin. Makalah ini bertujuan untuk menganalisis desain proses sistem pendingin utama reaktor RRI daya 50 MW (RRI-50) dengan menggunakan program Chemcad 6.1.4. Dalam analisis ini dilakukan

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Rzayev, A. H., G. A. Guluyev, F. H. Pashayev, As H. Rzayev, and R. Sh Asadova. "Mathematical Models for Determining the Distribution of Fluid Flow Temperature along the Wellbore and Horizontal Pipeline." Mekhatronika, Avtomatizatsiya, Upravlenie 21, no. 6 (2020): 337–47. http://dx.doi.org/10.17587/mau.21.337-347.

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This paper presents a proposed new indirect method determining instantly oil well debit using developed mathematical models. As a result integrated analysis using the models it has been revealed correlation between oil well debit and well throw out flow temperature. Therefore putting purpose was obtained. Mathematical models are developed for the distribution of fluid flow temperature along the length of the tubing from the well bottom to the wellhead and along the length of the oil pipeline from the collector of oil wells to the oil treatment unit. On the basis of experimental data, the autho

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Piptyuk, V. P., A. S. Vergun, S. V. Grekov, S. E. Samohvalov, and K. S. Krasnikov. "Development of technological regulation for carbon ironing of iron in 30t ladle. Part 1." Fundamental and applied problems of ferrous metallurgy, no. 33 (2019): 129–42. http://dx.doi.org/10.52150/2522-9117-2019-33-123-142.

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The results of numerical simulation of the carbonization of low-carbon iron as a by-product of the production of titanium slag for the designed unit ladle-furnace (LF) installation as applied to the conditions of PJSC Zaporizhzhya Titanium-Magnesium Combine are presented. The technological regulations have been developed and a numerical study has been carried out on the carburization of metal in a 30-ton ladle at the LF. For the production of commercial pig iron, associated iron-containing waste is used. The purpose of the work is to identify factors of the influence of out-of-furnace processi

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Iannarelli, Riccardo, та Michel J. Rossi. "Heterogeneous kinetics of H<sub>2</sub>O, HNO<sub>3</sub> and HCl on HNO<sub>3</sub> hydrates (<i>α</i>-NAT, <i>β</i>-NAT, NAD) in the range 175–200 K". Atmospheric Chemistry and Physics 16, № 18 (2016): 11937–60. http://dx.doi.org/10.5194/acp-16-11937-2016.

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Abstract. Experiments on the title compounds have been performed using a multidiagnostic stirred-flow reactor (SFR) in which the gas phase as well as the condensed phase has been simultaneously investigated under stratospheric temperatures in the range 175–200 K. Wall interactions of the title compounds have been taken into account using Langmuir adsorption isotherms in order to close the mass balance between deposited and desorbed (recovered) compounds. Thin solid films at 1 µm typical thickness have been used as a proxy for atmospheric ice particles and have been deposited on a Si window of

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Christopoulos, Georgios, Zachi I. Attia, Peter A. Noseworthy, et al. "Use of Artificial Intelligence Electrocardiography to Predict Atrial Fibrillation (AF) in Patients with Chronic Lymphocytic Leukemia (CLL)." Blood 136, Supplement 1 (2020): 50–51. http://dx.doi.org/10.1182/blood-2020-142645.

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Background: Clinical factors including previous history of AF, heart failure, hypertension, valvular heart disease, increased age and male gender increase the risk of AF in CLL patients (Shanafelt, Leukemia and Lymphoma 2017). Treatment with Bruton tyrosine kinase inhibitors (BTKi) such as ibrutinib has also been associated with an increased risk of AF in CLL. We evaluated the role of artificial intelligence electrocardiography (AI-ECG) in predicting ibrutinib-induced AF (and, for reference, AF unrelated to ibrutinib) in patients with CLL. Methods: We identified two cohorts of CLL patients usi

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Nguyen, Sang Thanh, Ngoc Ha Hoang, and Mohamed Azlan Hussain. "Analysis of the Steady-State Multiplicity Behavior for Polystyrene Production in the CSTR." Chemical Product and Process Modeling 12, no. 4 (2017). http://dx.doi.org/10.1515/cppm-2017-0027.

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Abstract The work proposes two different approaches where the first one is based on the tools of the system theory and the other is strongly related to the principle of heat balance, in order to analyze the abnormal phenomena of the continuous styrene polymerization reactors, i. e. the multiplicity behavior in the wide range of operating conditions. More precisely, the multiplicity behavior of polystyrene production in a continuous stirred tank reactor (CSTR) is carried out by the numerical simulations through the Van Heerden diagram and the phase plane. Furthermore, the bifurcation diagrams i

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