Journal articles: 'Partial heating'

1

Beck, James V., A. Haji-Sheikh, Donald E. Amos, and David Yen. "Verification solution for partial heating of rectangular solids." International Journal of Heat and Mass Transfer 47, no. 19-20 (September 2004): 4243–55. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2004.04.021.

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Hasanen, M. Hussen, and Hussein J. Akeiber. "Laminar and Turbulent Natural Convection Simulation with Radiation in Enclosure." Applied Mechanics and Materials 818 (January 2016): 3–11. http://dx.doi.org/10.4028/www.scientific.net/amm.818.3.

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Several features of heat transfer on enclosing surfaces are discussed including temperature distributions in a room heated by a floor heater. Numerical analyses on radiative and convective heat transfer were carried out against several partial floor heating. Partial floor heating produces different types of temperature distribution between the heated and non-heated places, which is a remarkable characteristics found out in this study. In the heated places, the temperature distribution is almost the same as that of typical floor heating. However, in the non-heated places, air temperature differs by 6 °C (3.6 °Difference) between a point near the floor surface and a point well above that. Heating efficiency of partial heating slightly depends on the set place as well as its Area. Moreover, convective heat exchange constitutes approximately half of the total heat exchange

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Howard, Stephen L. "Impact of Partial Heating of Solid Propellant as Elucidated by Simulation of Microwave Heating." Propellants, Explosives, Pyrotechnics 26, no. 3 (June 2001): 130–36. http://dx.doi.org/10.1002/1521-4087(200106)26:3<130::aid-prep130>3.0.co;2-o.

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Lee, Kim, and Kim. "Experimental Study on Forced Convection Heat Transfer from Plate-Fin Heat Sinks with Partial Heating." Processes 7, no. 10 (October 21, 2019): 772. http://dx.doi.org/10.3390/pr7100772.

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In this study, plate-fin heat sinks with partial heating under forced convection were experimentally investigated. The base temperature profiles of the plate-fin heat sinks were measured for various heating lengths, heating positions, flow rates, and channel widths. From the experimental data, the effects of heating length, heating position, and flow rate on the base temperature profile and the thermal performance were investigated. Finally, the characteristics of the optimal heating position were investigated. As a result, it was shown that the optimal heating position was on the upstream side in the case of the heat sinks under laminar developing flow, as opposed to the heat sinks under turbulent flow. It was also shown that the optimal heating position could change significantly due to heat losses through the front and back of the heat sink, while the effects of the heat loss through the sides of the heat sink on the optimal heating position were negligible. In addition, it was shown that the one-dimensional numerical model with empirical coefficients could predict the important trends in the measured temperature profiles, thermal resistances, and optimal heating lengths.

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FURUKAWA, Toshiro, Hiroshi NAKANISHI, and Hiroshi UNEYAMA. "Generalized Thermoelasticity of Layered Medium Subjected to Partial Heating." Transactions of the Japan Society of Mechanical Engineers Series A 67, no. 656 (2001): 651–57. http://dx.doi.org/10.1299/kikaia.67.651.

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Bareford, M. R., A. W. Hood, and P. K. Browning. "Coronal heating by the partial relaxation of twisted loops." Astronomy & Astrophysics 550 (January 23, 2013): A40. http://dx.doi.org/10.1051/0004-6361/201219725.

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7

Khdeir, A. A., and O. J. Aldraihem. "Analysis of Cross Ply Laminated Beams Under Partial Heating." Journal of Mechanics 33, no. 2 (May 12, 2016): 147–55. http://dx.doi.org/10.1017/jmech.2016.31.

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AbstractThermal deformations in symmetric and antisymmetric cross-ply laminated beams subjected to partial heating are investigated. Some regions of the beam are subjected to thermal loads and the others are thermally unloaded (ΔT = 0). The thermal field is expressed in terms of Heaviside discontinuity functions. The state space approach along with Jordan canonical form is used to generate exact solutions for the thermoelastic response of beams for arbitrary boundary conditions. A first order shear deformation theory is used in the analysis. Deflections are computed for beams subjected to partial heating with various lamination schemes and boundary conditions undergoing uniform and linearly varying temperature through the thickness. Exact thermal deflection curves are presented for beams under step-wise varying temperature field. The solutions presented in this study can readily be used to investigate the thermoelastic behavior of narrow chip-substrate structure, laminated member in laser cutting, composite link in hypersonic vehicle, and etc.

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8

Beck, James V. "Transient three-dimensional heat conduction problems with partial heating." International Journal of Heat and Mass Transfer 54, no. 11-12 (May 2011): 2479–89. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2011.02.014.

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9

Polidori, G., J. Padet, G. Polidori, and J. Padet. "Heating and partial cooling problems in unsteady forced convection." European Physical Journal Applied Physics 4, no. 3 (December 1998): 235–38. http://dx.doi.org/10.1051/epjap:1998265.

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10

Lim, Myung-hwan, and Changhee Lee. "Evaluation of Heating Technique of Deformed Reinforcement Using High-Frequency Induction Heating System." Applied Sciences 11, no. 11 (May 27, 2021): 4947. http://dx.doi.org/10.3390/app11114947.

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To improve recycling quality, it is necessary to develop a demolition technology that can be combined with existing crushing methods that employ large shredding-efficient equipment. The efficient collection of bones in a segmentation dismantling method must be considered according to the procedure. Furthermore, there is a need for the development of partial dismantling technologies that enable efficient remodeling, maintenance, and reinforcement. In this study, we experimentally investigated the temperature-rise characteristics of reinforced concrete through partial rapid heating during high-frequency induced heating. Accordingly, the chemical and physical vulnerability characteristics of the reinforced concrete were verified by studying the thermal conduction on the surface of the rebars and the cracks caused by the thermal expansion pressure of the rebars. Furthermore, we aimed to verify the applicability of the proposed technology by specifying the vulnerability range of the reinforced concrete based on the heating range, as well as the appropriate energy consumption. We investigated the temperature rise and temperature distribution characteristics of the rebar surfaces based on diameter, length, bar placement conditions, heating distance, heating coil location, and output, using reinforced steel of grade SD345. Maximum powers of 5, 6, and 10 kW, and inductive heating were used to achieve satisfactory results.

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11

Liu, ZhiTan, XiaoDong Ren, ZhiYuan Yan, HongFei Zhu, Tao Zhang, Wei Zhu, and XueSong Li. "Effect of Inlet Air Heating on Gas Turbine Efficiency under Partial Load." Energies 12, no. 17 (August 29, 2019): 3327. http://dx.doi.org/10.3390/en12173327.

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A novel heating technology is presented to analyze the influence of inlet air heating on gas turbine efficiency under partial load. This technology uses the waste heat of a low-temperature heat sources, which includes but is not limited to the exhaust gas of a combined-cycle heat-recovery steam generator or a single-cycle gas turbine. A calculation model of the equilibrium running point is used for the given load and the characteristic curves of the compressor and the turbine to study the mechanism of the inlet air heating technology. Then, the equilibrium running line is calculated and drawn in the characteristic curves of the compressor and the turbine. The factors for gas turbine efficiency are discussed through the calculated equilibrium running line. The results show that an increase in inlet air temperature has considerable potential for improving gas turbine efficiency due to the increase in compressor and turbine efficiency. This finding is different from traditional viewpoints. Meanwhile, each partial load has an optimum heating temperature which becomes higher when the load is lower.

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12

Zhao, Fan, Chao Lei Zhang, Qi Xiu, Yao Tan, Shang Ye Zhang, and Ya Zheng Liu. "Surface Decarburization Behavior of Spring Steel 60Si2MnA under A_C1 Temperature and in Temperature Range A_C3-G." Materials Science Forum 817 (April 2015): 132–36. http://dx.doi.org/10.4028/www.scientific.net/msf.817.132.

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Surface decarburization of spring steel 60Si2MnA heated under AC1 temperature and in temperature range of AC3-G was investigated. The results show that under the AC1 temperature, pearlite spheroidization and surface decarburization were carried out simultaneously and had a mutual promotion relationship. In the temperature range of AC3-G, decarburized layer consisted of complete and partial decarburization, and the complete decarburized depth increased but the partial decarburized depth just a small change with the increase of heating time. Besides, when heating temperature was 790 °C, functional relation between the total decarburized depth, the complete decarburized depth and the heating time follows the formula of and , respectively.

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13

Khomenko, E., and M. Collados. "HEATING OF THE MAGNETIZED SOLAR CHROMOSPHERE BY PARTIAL IONIZATION EFFECTS." Astrophysical Journal 747, no. 2 (February 17, 2012): 87. http://dx.doi.org/10.1088/0004-637x/747/2/87.

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14

Khan, T. M. Yunus, Irfan Anjum Badruddin, and G. A. Quadir. "Heat transfer in a conical porous cylinder with partial heating." IOP Conference Series: Materials Science and Engineering 149 (September 2016): 012211. http://dx.doi.org/10.1088/1757-899x/149/1/012211.

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15

Maeno, Tomoyoshi, Masayuki Tomobe, Ken-ichiro Mori, and Yuto Ikeda. "Hot stamping of titanium alloy sheets using partial contact heating." Procedia Manufacturing 15 (2018): 1149–55. http://dx.doi.org/10.1016/j.promfg.2018.07.375.

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16

Lavčević, M. Lučić, and Z. Ogorelec. "Aggregates of Sn-clusters: partial coalescence during the initial heating." Materials Letters 57, no. 13-14 (April 2003): 1885–87. http://dx.doi.org/10.1016/s0167-577x(02)01094-7.

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17

Yücel, Nuri. "Natural convection in rectangular enclosures with partial heating and cooling." Wärme- und Stoffübertragung 29, no. 8 (September 1994): 471–77. http://dx.doi.org/10.1007/bf01539499.

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18

Kim, W. B., B. J. Ye, and S. Yi. "Crystallization Behaviors of the Bulk Amorphous Alloy Ni₆₀Zr₂₅Al₈Y₇." Materials Science Forum 449-452 (March 2004): 941–44. http://dx.doi.org/10.4028/www.scientific.net/msf.449-452.941.

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The effects of partial replacements of Zr by Y in the alloy Ni60Zr25-xAl8Yx(x=0 and 7 at %) on the crystallization behaviors of amorphous alloys were studied using isothermally heattreated ribbons. With the partial replacement, the supercooled liquid region upon continuous heating was significantly extended indicating that crystallization can be effectively suppressed by the optimum amount of Zr replacement by Y. The first phase appeared during crystallization was identified as the ternary compound AlNi2Zr while the single exothermic event could be observed upon heating the amorphous ribbons. The AlNi2Zr phase was decomposed into binary compounds upon further heating. Therefore, the extended supercooled liquid region of the alloy Ni60Zr25Al8Y7was attributed to the suppression of AlNi2Zr phase formation by the partial replacement of Zr by Y. The effects of Y on the crystallization behaviors were discussed on the basis of atomic configuration of the supercooled liquid.

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19

Reuther, Franz, Thomas Lieber, Jürgen Heidrich, and Verena Kräusel. "Numerical Investigations on Thermal Forming Limit Testing with Local Inductive Heating for Hot Forming of AA7075." Materials 14, no. 8 (April 9, 2021): 1882. http://dx.doi.org/10.3390/ma14081882.

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Forming 7000-series aluminum alloys under elevated temperatures is particularly attractive due to their increased formability. To enable process design by finite element simulation for hot forming, strain-based criteria, such as temperature-dependent forming limit diagrams (TFLD), can be consulted to assess forming feasibility. This work numerically investigates the extent to which in-plane experimental concepts with partial inductive heating are suitable for detecting discrete failure points in TFLD. In particular, an alternative to the currently widely used thickness-reduced specimen geometries was created for cruciform specimens under biaxial tension. First, the temperature-dependent and strain-rate-dependent flow behavior was investigated for AA7075 under uniaxial tension. A heat source model for partial inductive heating was inversely parameterized based on heating experiments. Subsequently, the test procedures were simulated with different specimen geometries under discrete strain conditions. Different concepts were discussed for deriving a suitable specimen shape for the biaxial tension case, and the influence of different notch and slot forms were shown. The simulations showed that partial inductive heating was suitable to induce failure situations, thus creating TFLDs. For the biaxial tension case, a sufficiently large temperature gradient was required to use cruciform specimens without thickness reduction.

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20

POLYAKOV, D. A., P. A. BATRAKOV, V. A. ZHIGADLO, and K. I. NIKITIN. "SIMULATION OF THE TEMPERATURE FIELD OF THE HEATING SETUP FOR STUDYING THE TEMPERATURE DEPENDENCES OF PARTIAL DISCHARGES CHARACTERISTICS." Actual Issues Of Energy 3, no. 1 (2021): 063–69. http://dx.doi.org/10.25206/2686-6935-2021-3-1-63-69.

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The article describes a study devoted to the development of a heating chamber of the installation for studying the dependences of partial discharge characteristics on temperature. The requirements for the safe operation of the installation have been developed accounting that a cable sample under voltage is placed inside the heating chamber. Geometric models of vertical and horizontal execution of the heating chamber have been built. In the constructed models, the temperature distribution patterns inside the heating chamber are determined. The thermal field on the cable sample surface is the most important value since it significantly affects the characteristics of partial discharges in cable insulation. The obtained results showed that the permissible difference in the cable surface temperature was exceeded. In the subsequent work, measures will be taken to reduce the unevenness of the thermal field by adjusting the heat transfer coefficients or changing the geometry of the installation model.

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21

Lu, Jingwen, Yutaka Kitamura, Kenji Takisawa, and Weizhong Jiang. "Development of a partial heating system to enhance bio-ammonia production and recovery by anaerobic digestion of nitrogen-rich wastewater: Effect of partial heating modules." Chemical Engineering Journal 262 (February 2015): 973–79. http://dx.doi.org/10.1016/j.cej.2014.10.047.

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22

Eswaramoorthi, S., K. Loganathan, S. Sivasankaran, M. Bhuvaneswari, and S. Rajan. "MHD Flow of Carreau Liquid with Partial Slip and Newtonian Heating." International Journal of Engineering & Technology 7, no. 4.10 (October 2, 2018): 637. http://dx.doi.org/10.14419/ijet.v7i4.10.21301.

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This work deliberates the MHD flow of Carreau liquid past a stretching plate with thermal radiation, viscous dissipation and Joule heating. Additionally, partial velocity slip and Newtonian heating effects are included in our study. The similarity transformations are used to convert the governing dimensional partial differential equations into dimensionless ordinary differential equations. Homotopy analysis method (HAM) is employed to find the convergent series solutions of the governed non-linear ordinary differential equations. It is found that the magnetic field parameter slowdown the liquid motion and rises the liquid temperature. In addition, heat generation parameter enhances the thermal boundary layer thickness and chemical reaction parameter suppresses the solutal boundary layer thickness.

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23

Rabani, Ramin, and Mehrdad Rabani. "Natural Convection Heat Transfer Inside a Square Enclosure with Partial Heating." International Journal of Fluid Mechanics Research 43, no. 3 (2016): 251–70. http://dx.doi.org/10.1615/interjfluidmechres.v43.i3.50.

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24

HIROSE, Koichi, Yoshiyuki NISHIMURA, and Hidehumi HIGASHI. "Natural Convection Heat Transfer in Horizontal Elliptical Annuli with Partial Heating." Proceedings of Conference of Tohoku Branch 2002 (2002): 15–16. http://dx.doi.org/10.1299/jsmeth.2002.15.

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Lee, Jaeyoung, Kazunori Harada, Sunggoo Kang, Youngjin Kwon, and Masahiro Yamazaki. "Entire and Partial Heating Tests of High Strength Concrete Small Columns." Procedia Engineering 62 (2013): 804–12. http://dx.doi.org/10.1016/j.proeng.2013.08.129.

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26

Morimoto, Takuya, Yoshinobu Tanigawa, and Ryuusuke Kawamura. "Thermal buckling of functionally graded rectangular plates subjected to partial heating." International Journal of Mechanical Sciences 48, no. 9 (September 2006): 926–37. http://dx.doi.org/10.1016/j.ijmecsci.2006.03.015.

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27

FURUKAWA, Toshio, and Hitoshi YOSHIOKA. "2219 Generalized Thermoelasticity of Functionally Graded Material Subjected to Partial Heating." Proceedings of the JSME annual meeting 2007.1 (2007): 267–68. http://dx.doi.org/10.1299/jsmemecjo.2007.1.0_267.

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28

Torczynski, J. R. "Partial Acoustic Filtering Applied to the Equations of Compressible Flow." Journal of Fluids Engineering 113, no. 4 (December 1, 1991): 709–12. http://dx.doi.org/10.1115/1.2926541.

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Gas contained in a rectangular laser cell of large length and small width is subjected to large, transient, spatially nonuniform, volumetric heating when pumped. The heating time scale is much longer than the time required for an acoustic wave to traverse the width but can be comparable to the time required for an acoustic wave to traverse the length. Approximate equations describing the motion are derived by applying partial acoustic filtering to the equations of motion: pressure waves traversing the width are removed while pressure waves traversing the length are retained. For a simplified one-dimensional example, a significant density variation is found across the width of the laser cell; moreover, this density variation is in good agreement with a numerical solution of the unapproximated gas dynamic equations although the latter requires two orders of magnitude more computational time

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Kyncl, Jan, Jiří Doubek, and Lubomír Musálek. "Modeling of Dielectric Heating within Lyophilization Process." Mathematical Problems in Engineering 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/349816.

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A process of lyophilization of paper books is modeled. The process of drying is controlled by a dielectric heating system. From the physical viewpoint, the task represents a 2D coupled problem described by two partial differential equations for the electric and temperature fields. The material parameters are supposed to be temperature-dependent functions. The continuous mathematical model is solved numerically. The methodology is illustrated with some examples whose results are discussed.

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DESHKO, VALERII, INNA BILOUS, IRYNA SUKHODUB, and TETYANA BOIKO. "ЕНЕРГОСПОЖИВАННЯ НАВЧАЛЬНИХ КОРПУСІВ УНІВЕРСИТЕТУ В УМОВАХ КАРАНТИННИХ ОБМЕЖЕНЬ УКРАЇНИ." Technologies and Engineering, no. 2 (December 24, 2021): 9–19. http://dx.doi.org/10.30857/2786-5371.2021.2.1.

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Target. To analyze the features of energy consumption of the building of the educational building No. 17 of the National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute" in the conditions of quarantine restrictions in the implementation of energy-saving heating schemes.Methodology. Dynamic energetic modeling of a university academic building created in the DesignBuilder software environment under normal and quarantine modes.Results. Recommendations for the implementation of energy-saving modes of heating the building of the academic building of the university during the period of distance learning when introducing quarantine restrictions in Ukraine.Scientific novelty. An integrated approach has been developed to an in-depth analysis of energy consumption under conditions of partial use of the premises of educational buildings during the quarantine period. It is substantiated that the use of premises with partial operation of the building requires additional unit costs for heating needs.Practical significance. Simulation dynamic modeling of the building's energy consumption for heating for various modes of operation and employment / use of premises of educational buildings during the quarantine period in Ukraine, the results of the study will allow to obtain a set of energy characteristics of the building as a whole and its individual rooms / zones for hourly changes in internal operating conditions and external climatic conditions. The use of the proposed scheme of operation of the heating system of the building of the educational building allows to reduce energy consumption during the heating period by 8,5% compared to energy consumption during normal operation, which is economically feasible in conditions of partial occupancy of the building during quarantine restrictions (during lockdown) and an unpredictable macroeconomic situation on the energy market, causing a trend towards an increase in prices for basic energy resources.

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31

Muhammad Irfan and Faizir Ramlie. "Analysis of Parameters which Affects Prediction of Energy Consumption in Buildings using Partial Least Square (PLS) Approach." Journal of Advanced Research in Applied Sciences and Engineering Technology 25, no. 1 (December 19, 2021): 61–68. http://dx.doi.org/10.37934/araset.25.1.6168.

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The development of energy consumption prediction model is an integral part of the management and improvement of building energy efficiency in order to save the energy and to reduce the environmental impact. There are factors that affect energy in buildings which are heating and cooling. Building materials, ventilation, building direction, and building area are the important factors to determine building energy efficiency. The study aims to find the role of input variable (independent) on the output variable (dependent) in the form of Heating Load (HL) and Cooling Load (CL). The study employs Partial Least Square (PLS) analysis method which is a variant-based Structural Equation Modeling analysis known as SEM-PLS. The result of the study indicates that the estimation of inner model of the direct influence of Orientation on Cooling Load and Heating Load is not significant. It means the size of the Orientation value does not significantly affect the increase/decrease in Cooling Load and Heating Load. While the direct effect of Overall Height, Wall Area, and Surface Area on Cooling Load and Heating Load is significant. It means that the value of Overall Height, Wall Area, and Surface Area has a significant effect on increasing/decreasing Cooling Load and Heating Load. The results of this study are expected to be useful to help building designers, especially related to energy efficiency in the buildings. In addition, the development of this model can be used as an alternative in determining the factors that affect comfort in a building.

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He, Wei, Fengshou Liu, Jie Ji, Shengyao Zhang, and Hongbing Chen. "Safety Analysis of Solar Module under Partial Shading." International Journal of Photoenergy 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/907282.

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Hot spot often occurs in a module when the qualities of solar cells mismatch and bypass diodes are proved to be an efficient alternative to reduce the effect of hot spot. However, these principles choosing a diode are based on the parameters of bypass diodes and PV cells without consideration of the maximum heating power of the shaded cell, which may cause serious consequences. On this basis, this paper presents a new approach to investigate partially shaded cells in different numbers of PV cells and different shading scenarios, including inhomogeneous illumination among solar cells and incomplete shading in one cell, which innovatively combines the same cells or divides one affected cell into many small single cells and then combines the same ones, and analyzes the shaded cell. The results indicate that the maximum power dissipation of the shaded cell occurs at short-circuit conditions. With the number of solar cells increasing, the shaded cell transfers from generating power to dissipating power and there is a maximum point of power dissipation in different shading situations that may lead to severe hot spot. Adding up the heat converted from solar energy, the heating power can be higher. In this case, some improvements about bypass diodes are proposed to reduce hot spot.

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Chowdhury, Mahmudun Nabi, and Dinh Thi Kieu Anh. "Development of Electrically Assisted Rapid Heating for Metal Forming of Hot-Stamping Process." Journal of Materials Science Research 5, no. 3 (June 20, 2016): 66. http://dx.doi.org/10.5539/jmsr.v5n3p66.

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<p class="1Body">Two different concepts of electrically assisted (EA) rapid heating of Al–Si coated hot-stamping steels are compared. In “along the surface” EA heating (or simply EA surface heating), the electric current is simply applied to a specimen by clamping the each end of the specimen length with a set of flat rectangular electrodes. In “through the thickness” EA heating (or simply EA thickness heating), the electric current is applied to a specimen by attaching a set of electrodes with multiple contact points on upper and lower surfaces of the specimen. While the EA surface heating generally requires a shorter heating time due to a higher electrical resistance in the length direction, the EA thickness heating also may provide a technical advantage that the heating area can be more easily configured in a case of partial austenization.</p>

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Wang, Hui, Fuyong Su, and Zhi Wen. "Study on Decarburization Mechanism and Law of GCr15 Bearing Steel during Heat Treatment." Advances in Materials Science and Engineering 2022 (June 20, 2022): 1–11. http://dx.doi.org/10.1155/2022/3723680.

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In order to understand the effects of heating temperature and holding time on decarburization of GCr15 bearing steel, an experimental device for heat treatment of bearing steel was designed and the sample was heated and held by a tubular heating furnace. The microstructure and depth of decarburized layer of bearing steel under various working conditions were observed and measured by a metallographic microscope. The results show that the total decarburization depth increases with the increase of temperature; almost no decarburization occurred below 700°C; ferrite decarburization occurred at 750°C; partial decarburization began to occur at 820°C; after 900°C, the decarburization layer is mainly partial decarburization. When the heating temperature is below 1000°C, the depth of total decarburization layer increases slowly and increases rapidly after 1000°C. The total depth of decarburization layer is directly proportional to the square root of holding time. The relationship between the depth of the total decarburization layer of bearing steel and the heating temperature and holding time in the annealing process was obtained.

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Drahniev, S. V., and T. A. Zheliezna. "Energy balance estimation of growing corn for grain with alienation of its by-products for bioenergy needs." Mehanization and electrification of agricultural, no. 13(112) (2021): 187–95. http://dx.doi.org/10.37204/0131-2189-2021-13-21.

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Annotation Purpose. Energy assessment of growing corn for grain with a comparison of two options for the use of corn by-products: partial collection of the by-products as solid biofuel for heat production or leaving all the crop residues in the field with further plowing them into the soil and heating with natural gas. Methods. Theoretical methods of designing technological processes in crop production, energy assessment of mechanized crop production technologies, life cycle analysis and computer modeling. Results. A comprehensive energy analysis with the inclusion of all technological processes of growing corn for grain, partial harvesting of its by-products and further use for heat production compared to plowing all the crop residues into the soil and using natural gas for heating. Conclusions. It is established that by meeting the agronomic requirements for the alienation of corn for energy needs, significant savings in anthropogenic energy per unit of heat produced compared to the option of plowing all the crop residues into the soil and using natural gas for heating. Keywords: energy analysis, corn, by-products, crop residues, biofuel, heat, heating.

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Nakada, Nobuo, Yusuke Arakawa, Kyo Sun Park, Toshihiro Tsuchiyama, and Setsuo Takaki. "Microstructural Control of Dual Phase Structure Formed by Partial Reversion from Cold-Deformed Martensite." Materials Science Forum 753 (March 2013): 191–94. http://dx.doi.org/10.4028/www.scientific.net/msf.753.191.

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Dual phase (DP) structure formed by partial reversion from cold-deformed martensite was investigated to improve mechanical property of DP steel by grain refinement strengthening. A low carbon martensitic steel (0.15C-1.0Mn) was cold-rolled and then held just above A1 temperature to partially form austenite. In particular, the conditions of cold-rolling rate (0~60% reduction in thickness) and heating rate (0.083 and 100 K/s) were varied to understand their effects on the microstructural development of DP structure. Although the recrystallization has never occurred in undeformed martensite, cold-deformed martensite was more easily recrystallized before reversion with increasing rolling rate and lowering heating rate. Then, the matrix of DP structure was changed from tempered martensite to recrystallized ferrite, which had a large influence on the distribution of fresh martensite transformed from reversed austenite. The higher rolling and heating rates resulted in the finer DP structure, leading to a large improvement in strength level.

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Maeno, Tomoyoshi, Yuya Yamashita, and Ken-Ichiro Mori. "Hot Stamping of Titanium Alloy Sheets into U Shape with Concave Bottom and Joggle Using Resistance Heating." Key Engineering Materials 716 (October 2016): 915–22. http://dx.doi.org/10.4028/www.scientific.net/kem.716.915.

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The hot stamping of α+β titanium alloy sheet into U shape with concave bottom using resistance heating were performed. Since both edges of the sheet in contact with a pair of electrodes were not heated, cracks occurred around the corners of the bottom due to the partially high flow stress. The cracks were prevented by slitting both edges before resistance heating because of the elongation of the edges. In addition, the hot stamping of titanium alloy sheet into joggle using partial resistance heating were performed. The distortion of sheet was reduced by reduction in area of resistance heating

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Tsuji, Bun, Davide Filingeri, Yasushi Honda, Tsubasa Eguchi, Naoto Fujii, Narihiko Kondo, and Takeshi Nishiyasu. "Effect of hypocapnia on the sensitivity of hyperthermic hyperventilation and the cerebrovascular response in resting heated humans." Journal of Applied Physiology 124, no. 1 (January 1, 2018): 225–33. http://dx.doi.org/10.1152/japplphysiol.00232.2017.

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Elevating core temperature at rest causes increases in minute ventilation (V̇e), which lead to reductions in both arterial CO2 partial pressure (hypocapnia) and cerebral blood flow. We tested the hypothesis that in resting heated humans this hypocapnia diminishes the ventilatory sensitivity to rising core temperature but does not explain a large portion of the decrease in cerebral blood flow. Fourteen healthy men were passively heated using hot-water immersion (41°C) combined with a water-perfused suit, which caused esophageal temperature (Tes) to reach 39°C. During heating in two separate trials, end-tidal CO2 partial pressure decreased from the level before heating (39.4 ± 2.0 mmHg) to the end of heating (30.5 ± 6.3 mmHg) ( P = 0.005) in the Control trial. This decrease was prevented by breathing CO2-enriched air throughout the heating such that end-tidal CO2 partial pressure did not differ between the beginning (39.8 ± 1.5 mmHg) and end (40.9 ± 2.7 mmHg) of heating ( P = 1.00). The sensitivity to rising Tes (i.e., slope of the Tes − V̇E relation) did not differ between the Control and CO2-breathing trials (37.1 ± 43.1 vs. 16.5 ± 11.1 l·min−1·°C−1, P = 0.31). In both trials, middle cerebral artery blood velocity (MCAV) decreased early during heating (all P < 0.01), despite the absence of hyperventilation-induced hypocapnia. CO2 breathing increased MCAV relative to Control at the end of heating ( P = 0.005) and explained 36.6% of the heat-induced reduction in MCAV. These results indicate that during passive heating at rest ventilatory sensitivity to rising core temperature is not suppressed by hypocapnia and that most of the decrease in cerebral blood flow occurs independently of hypocapnia. NEW & NOTEWORTHY Hyperthermia causes hyperventilation and concomitant hypocapnia and cerebral hypoperfusion. The last may underlie central fatigue. We are the first to demonstrate that hyperthermia-induced hyperventilation is not suppressed by the resultant hypocapnia and that hypocapnia explains only 36% of cerebral hypoperfusion elicited by hyperthermia. These new findings advance our understanding of the mechanisms controlling ventilation and cerebral blood flow during heat stress, which may be useful for developing interventions aimed at preventing central fatigue during hyperthermia.

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Schulze, Martin, and Egbert Baake. "Tailored heating of forging billets using induction and conduction heating approaches." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 39, no. 1 (December 16, 2019): 100–107. http://dx.doi.org/10.1108/compel-05-2019-0217.

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Purpose This paper aims to deal with different induction and conduction heating approaches to realize a tailored heating of round billets for hot forming processes. In particular, this work examines the limits in which tailor-made temperature profiles can be achieved in the billet. In this way, a flow stress distribution based on the temperature field in the material can be set in a targeted manner, which is decisive for forming processes. Design/methodology/approach For the heating of round billets by induction, the rotationally symmetric arrangement is used and a parameterized 2D finite element method model is created. The harmonic electromagnetic solution is coupled with the transient thermal solution. For heating by means of conduction, the same procedure is used only with the use of a 3D model. Findings First results have shown that both methods can achieve very good results for billets with small diameters (d < 30 mm). For larger diameters, an adapted control of the heating process is necessary to ensure through heating of the material. Further investigations are carried out. Practical implications Using tailored heating for forging billets, several forming steps can be achieved in one step. Among other things, higher energy efficiency and throughput rates can be achieved. Originality/value The peculiarity of the tailored heating approach is that, in contrast to inhomogeneous heating, where only partial areas are heated, the entire component is heated to the target.

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Vaneetveld, G., Ahmed Rassili, and H. V. Atkinson. "Influence of Parameters during Induction Heating Cycle of 7075 Aluminium Alloys with RAP Process." Solid State Phenomena 141-143 (July 2008): 719–24. http://dx.doi.org/10.4028/www.scientific.net/ssp.141-143.719.

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Thixoforging involves shaping alloys with a globular microstructure in the semi-solid state. To reach this kind of material, the Recrystallisation and Partial Melting (RAP) process can be used to obtain a globular microstructure from extruded material with liquid penetrating the recrystallised boundaries. Induction heating is used to apply the RAP process to slugs. One of the benefits of using this method of heating is the fast heating rate (20°C/s). This paper will help to improve heating parameters by showing their influence on 7075 aluminium alloy recrystallisation. These parameters are the heating rate; heating frequencies-power; presence or not of protective gas; position of the slug in the inductor; energy stored inside the slug; oxide layer on the slug side; chamfer of the slug upper corner.

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Sioulas, Nikos, Chen Shi, Zesen Huang, and Marco Velli. "Preferential Heating of Protons over Electrons from Coherent Structures during the First Perihelion of the Parker Solar Probe." Astrophysical Journal Letters 935, no. 2 (August 1, 2022): L29. http://dx.doi.org/10.3847/2041-8213/ac85de.

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Abstract The solar wind undergoes significant heating as it propagates away from the Sun; the exact mechanisms responsible for this heating remain unclear. Using data from the first perihelion of the Parker Solar Probe mission, we examine the properties of proton and electron heating occurring within magnetic coherent structures identified by means of the Partial Variance of Increments (PVI) method. Statistically, regions of space with strong gradients in the magnetic field, PVI ≥ 1, are associated with strongly enhanced proton but only slightly elevated electron temperatures. Our analysis indicates a heating mechanism in the nascent solar wind environment facilitated by a nonlinear turbulent cascade that preferentially heats protons over electrons.

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Hoffmann, Eike, Rickmer Meya, and A. Erman Tekkaya. "Reduction of Warping in Kinematic L-Profile Bending Using Local Heating." Metals 11, no. 7 (July 20, 2021): 1146. http://dx.doi.org/10.3390/met11071146.

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Kinematic bending of profiles allows to manufacture parts with high flexibility concerning the geometry. Still, the production of profiles with asymmetric cross-sections regarding the force application axis using kinematic bending processes offers challenges regarding springback and warping. These geometric deviations can be reduced by partial, cross-sectional heating during the process as it lowers the flow stress locally. In this work, the influence of partial, cross-sectional heating during a three-roll push-bending process on the warping and springback of L-profiles is investigated. Numerical and experimental methods reveal the influence of temperature on warping and springback. A newly developed analytical model predicts the warping and bending moment in the design phase and assists to understand the effect of warping reduction through partial heating during plastic bending. With increasing temperature of the heated profile area, the warping is reduced up to 76% and the springback of the bend profiles is decreased up to 44%. The warping reduction is attributed to a shift in stress free fiber due to the temperature gradient between heated and room temperature areas. The shift of stress-free fiber leads to an adapted shear center position, resulting in an approximated “quasi-symmetric” bending case.

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Lv, Ming, Haiqiang Liu, Xin Nie, and Muhammad Aqeel Ashraf. "Characteristic Studies of Micron Zinc Particle Hydrolysis in a Fixed Bed Reactor." Polish Maritime Research 22, s1 (September 1, 2015): 112–20. http://dx.doi.org/10.1515/pomr-2015-0042.

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Abstract Zinc fuel is considered as a kind of promising energy sources for marine propeller. As one of the key steps for zinc marine energy power system, zinc hydrolysis process had been studied experimentally in a fixed bed reactor. In this study, we focus on the characteristics of micron zinc particle hydrolysis. The experimental results suggested that the steam inner diffusion is the controlling step of accumulative zinc particles hydrolysis reaction at a relative lower temperature and a relative higher water partial pressure. In other conditions, the chemical reaction kinetics was the controlling step. And two kinds of chemical reaction kinetics appeared in experiments: the surface reaction and the gas-gas reaction. The latter one occurs usually for larger zinc particles and high reaction temperature. Temperature seems to be one of the most important parameters for the dividing of different reaction mechanisms. Several parameters of the hydrolysis process including heating rate, water partial pressure, the particle size and temperature were also studied in this paper. Results show that the initial reaction temperature of zinc hydrolysis in fixed bed is about 410°C. And the initial reaction temperature increases as the heating rate increases and as the water partial pressure decreases. The total hydrogen yield increases as the heating rate decreases, as the water partial pressure increases, as the zinc particle size decreases, and as the reaction temperature increases. A hydrogen yield of more than 81.5% was obtained in the fixed bed experiments.

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Lim, Myung-kwan, and Changhee Lee. "Evaluation of Weakening Characteristics of Reinforced Concrete Using High-Frequency Induction Heating Method." Applied Sciences 11, no. 12 (June 10, 2021): 5402. http://dx.doi.org/10.3390/app11125402.

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To increase the quality of recycling, a new demolition technique is required that can work in parallel with existing crushing methods, which use large equipment with high crushing efficiency. Moreover, the efficient collection of the remains from the fractional dismantling method needs to be considered based on its procedure, and the technology for partial dismantling that is efficient in remodeling, maintenance, and reinforcement has to be developed. In this study, the temperature-increasing characteristics of rebars inside ferroconcrete with respect to their arrangement was investigated by partial rapid heating through high-frequency induction heating. Based on this, the chemical and physical vulnerability characteristics of ferroconcrete due to the thermal conduction generated on the rebar surface and the cracks caused by the thermal expansion pressure of the rebar were verified. In addition, the objective of this study was to verify the applicability of the technology by specifying the vulnerability range of ferroconcrete based on the heating range with adequate consumption of energy.

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Abramson, A. R., P. Nieva, H. Tada, P. Zavracky, I. N. Miaoulis, and P. Y. Wong. "Effect of doping level during rapid thermal processing of multilayer structures." Journal of Materials Research 14, no. 6 (June 1999): 2402–10. http://dx.doi.org/10.1557/jmr.1999.0323.

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A numerical model has been developed to examine the temperature history of a multilayer wafer undergoing rapid thermal processing (RTP) for various doping densities. Partial transparency and thin film interference effects are considered. Doping levels from ∼1015 to ∼1018 cm−3 are examined. Numerical temperature predictions of the lightly doped wafer are compared with experimental measurements. Heating rates for the lightly doped wafer fluctuate due to partial transparency effects and reach a maximum of ∼50 °C/s. The heavily doped wafer sees a maximum heating rate of ∼100 °C/s. Because the wafers are opaque above 700 °C regardless of their level of doping, all wafers reach steady state at ∼845 °C.

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Nagasako, Shinya, and Haruhiko Sato. "The effects of partial heating on physiological responses in a cold environment." Japanese journal of ergonomics 34, Supplement (1998): 334–35. http://dx.doi.org/10.5100/jje.34.supplement_334.

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Handayani, Baiq Rien, Bambang Dipokusumo, Wiharyani Werdiningsih, and Sitta Fitri Rahmadhina. "Partial properties of ready-to-use shrimp paste affected by heating time." Current Research on Biosciences and Biotechnology 1, no. 2 (February 29, 2020): 57–61. http://dx.doi.org/10.5614/crbb.2019.1.2/jthm4041.

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Janeček, V., and V. S. Nikolayev. "Contact line singularity at partial wetting during evaporation driven by substrate heating." EPL (Europhysics Letters) 100, no. 1 (October 1, 2012): 14003. http://dx.doi.org/10.1209/0295-5075/100/14003.

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Makino, Atsushi, Nobuyuki Araki, Hidetoshi Kitajima, and Kentaro Ohashi. "Transient Temperature Response of Functionally Gradient Material Subjected to Partial, Stepwise Heating." Transactions of the Japan Society of Mechanical Engineers Series B 60, no. 580 (1994): 4200–4206. http://dx.doi.org/10.1299/kikaib.60.4200.

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MORIMOTO, Takuya, Yoshinobu TANIGAWA, and Ryuusuke KAWAMURA. "Linear Thermal Buckling Analysis of Inhomogeneous Rectangular Plate due to Partial Heating." Proceedings of The Computational Mechanics Conference 2003.16 (2003): 279–80. http://dx.doi.org/10.1299/jsmecmd.2003.16.279.

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Journal articles on the topic 'Partial heating'

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