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Journal articles on the topic 'Resistance to enthalpy transfer'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 July 2025

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1

LEE, EUL-JONG, JUNG-PYO LEE, HYUN-MIN SIM, and NAE-HYUN KIM. "MODELING AND VERIFICATION OF HEAT AND MOISTURE TRANSFER IN AN ENTHALPY EXCHANGER MADE OF PAPER MEMBRANE." International Journal of Air-Conditioning and Refrigeration 20, no. 03 (2012): 1250015. http://dx.doi.org/10.1142/s2010132512500150.

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In this study, heat and moisture transfer model of an enthalpy exchanger is proposed. With separately measured sorption constant and diffusion coefficient, the model predicts the heat and moisture transfer effectiveness of an enthalpy exchanger. Two sample enthalpy exchangers were tested at a KS condition to verify the model. The model predicts the heat transfer effectiveness within 4%, and the moisture transfer effectiveness within 10%. Pressure drop is predicted within 6%. The spacer fin efficiency for heat transfer was 0.11 to 0.13. The fin efficiency for moisture transfer, however, was neg

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2

Zhang, L. Z., and J. L. Niu. "Effectiveness Correlations for Heat and Moisture Transfer Processes in an Enthalpy Exchanger With Membrane Cores." Journal of Heat Transfer 124, no. 5 (2002): 922–29. http://dx.doi.org/10.1115/1.1469524.

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The performance correlations for the effectiveness of heat and moisture transfer processes in an enthalpy exchanger with membrane cores are presented. The physical phenomena relevant to the heat and moisture transfer in these devices have been used to develop a novel set of correlations based on the relevant dimensionless parameters. The total enthalpy effectiveness can be calculated from sensible effectiveness, latent effectiveness, and the ratio of latent to sensible energy differences across the unit. Studies show that the sensible effectiveness is a function of NTU, the number of transfer

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3

Zhai, Yu, Zhikun Ling, Xu Zhao, and Zhifeng Dong. "Effects of Structure Parameters of Gravity-Type Heat Pipe on Heat Transfer Characteristics for Waste Heat Recovery from Mine Return Air." Energies 17, no. 24 (2024): 6495. https://doi.org/10.3390/en17246495.

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In the condition of waste heat recovery from mine return air with a temperature of 20~30 °C and velocity about 4 to 8 m/s, the structure of gravity-type heat pipe with fin increases the heat exchange areas and meanwhile increases the resistance of air flow, which consumes a large amount of main fan power driven by a motor. Furthermore, the resistance of air flow increases greatly with the velocity of the air flow. In this paper, the gravity-type heat pipe with elliptical smooth surface is studied to decrease the resistance and loss of energy of the air flow. In order to obtain the influence of

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4

Križo, Kamil, Andrej Kapjor, and Michal Holubčík. "Polymer Membranes for Enthalpy Exchangers." Energies 15, no. 16 (2022): 6021. http://dx.doi.org/10.3390/en15166021.

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A membrane-based enthalpy exchanger is a device used for heat and humidity recovery in ventilated buildings. The energy-saving potential of such a device is dependent on the parameters responsible for heat and moisture recovery. The trend is toward composite membranes, which are custom produced, and their parameters can be adjusted for a given application; therefore, the diffusion and sorption characteristics of such membranes are unknown. In order to obtain the values of the water vapor diffusivity of three investigated handmade membranes, a serial resistance model using a Field and Laborator

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5

Li, Yong An, Xue Lai Liu, Jia Jia Yan, and Teng Xing. "Research on Wet Thermal Recovery Plant Used by Air Conditioning." Advanced Materials Research 424-425 (January 2012): 1155–58. http://dx.doi.org/10.4028/www.scientific.net/amr.424-425.1155.

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Based on the simulation Computational Fluid Dynamics method, in view of air conditioning with wet thermal recovery plant for heat and mass transfer characteristic, establishes air channels in three-dimensional laminar flow and heat transfer, mass transfer coupling process of mathematical physics model, discusses the air conditioning with wet thermal recovery plant air channels in temperature, concentration and pressure parameters such as distribution, application enthalpy efficiency analysis method to the heat transfer performance is evaluated. The results indicate that structure parameters of

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6

El-Dessouky, H. T. A., A. Al-Haddad, and F. Al-Juwayhel. "A Modified Analysis of Counter Flow Wet Cooling Towers." Journal of Heat Transfer 119, no. 3 (1997): 617–26. http://dx.doi.org/10.1115/1.2824150.

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The paper describes a theoretical investigation for the steady-state counter flow wet cooling tower with modified definitions for both the number of transfer units and the tower thermal effectiveness. The modified number of transfer units is dependent on both air and water heat capacity. The effectiveness is defined by the tower cooling range and the approach to equilibrium. A new expression relating the tower effectiveness to the modified number of transfer units and the capacity rate ratio has been developed. The model considered the resistance to heat transfer in the water film, the nonunit

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7

Shishatskii, Y. I., S. A. Nickel, S. A. Tolstov, I. A. Avcinov, A. A. Derkanosova, and A. E. Emelyanov. "Heat transfer mechanisms in cooling towers (theory and calculation methods)." Proceedings of the Voronezh State University of Engineering Technologies 86, no. 1 (2024): 31–37. https://doi.org/10.20914/2310-1202-2024-1-31-37.

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Cooling towers are high-intensity mixing heat exchangers. In them, heat exchange occurs at direct contact (contact) of heat carriers, i.e. in heat exchangers there is no thermal resistance of the wall. When circulating water is cooled by air, part of the heat is transferred due to surface evaporation of water - transformation of water into vapor with subsequent transfer of vapor by diffusion into the air stream. The other part is due to the temperature difference between water and air, i.e. heat transfer by contact (conduction and convection). Heat transfer by direct contact between air and in

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8

Kurose, Ryoichi, Naohisa Takagaki, Atsushi Kimura, and Satoru Komori. "Direct numerical simulation of turbulent heat transfer across a sheared wind-driven gas–liquid interface." Journal of Fluid Mechanics 804 (September 13, 2016): 646–87. http://dx.doi.org/10.1017/jfm.2016.554.

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Turbulent heat transfer across a sheared wind-driven gas–liquid interface is investigated by means of a direct numerical simulation of gas–liquid two-phase turbulent flows under non-breaking wave conditions. The wind-driven wavy gas–liquid interface is captured using the arbitrary Lagrangian–Eulerian method with boundary-fitted coordinates on moving grids, and the temperature fields on both the gas and liquid sides, and the humidity field on the gas side are solved. The results show that although the distributions of the total, latent, sensible and radiative heat fluxes at the gas–liquid inter

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9

Gallardo, Andres, and Umberto Berardi. "A simple method for validating a simulation model of a radiant ceiling panel with thermal energy storage." Journal of Physics: Conference Series 2069, no. 1 (2021): 012119. http://dx.doi.org/10.1088/1742-6596/2069/1/012119.

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Abstract This paper focuses on validating a simulation model of a radiant ceiling panel (RCP) incorporating phase change materials (PCM) for heating and cooling applications in buildings. The development of an RCP with thermal energy storage capacity aims to encourage high thermal mass radiant systems in existing buildings to replace the traditional all-air HVAC system. First, a heat flow meter (HFM) is used to perform enthalpy measurements at a product scale (macro-encapsulated PCM). Then, a small test chamber is constructed to measure the dynamic thermal performance of an RCP with PCM under

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10

Mahir, Maha, Anas El Maakoul, Ismail Khay, Said Saadeddine, and Mohamed Bakhouya. "An Investigation of Heat Transfer Performance in an Agitated Vessel." Processes 9, no. 3 (2021): 468. http://dx.doi.org/10.3390/pr9030468.

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Agitated vessels (or mechanically stirred reactors) are heat exchange devices that are most widely used in many chemical and biochemical process industries, such as anaerobic digestion process. The mixing and heat transfer performances in these vessels are of crucial importance for increasing the energy efficiency in both batch and continuous processes. In this paper, a series of experiments were conducted to investigate heat transfer performance in agitated vessels for various configurations. In fact, this study examines the effects of heat transfer geometry (wall jacket and helical coils), h

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11

Khan, Zakir, and Zulfiqar Ahmad Khan. "Performance Evaluation of Coupled Thermal Enhancement through Novel Wire-Wound Fins Design and Graphene Nano-Platelets in Shell-and-Tube Latent Heat Storage System." Energies 14, no. 13 (2021): 3743. http://dx.doi.org/10.3390/en14133743.

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Technological development in latent heat storage (LHS) systems is essential for energy security and energy management for both renewable and non-renewable sources. In this article, numerical analyses on a shell-and-tube-based LHS system with coupled thermal enhancement through extended fins and nano-additives are conducted to propose optimal combinations for guaranteed higher discharging rate, enthalpy capacity and thermal distribution. Transient numerical simulations of fourteen scenarios with varied combinations are investigated in three-dimensional computational models. The shell-and-tube i

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12

Zhai, Yu, Xu Zhao, Guanghui Xue, and Zhifeng Dong. "Study on Heat Transfer Performance and Parameter Improvement of Gravity-Assisted Heat Pipe Heat Transfer Unit for Waste Heat Recovery from Mine Return Air." Energies 16, no. 17 (2023): 6148. http://dx.doi.org/10.3390/en16176148.

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One of the effective methods for energy conservation and emission reduction in coal mines is to utilize waste heat recovery technology to recover mine return air waste heat. The gravity heat pipe is widely used in mine return air waste heat recovery due to its sustainable and economic advantages, but its heat transfer is a complex process influenced by multiple parameters. A single-tube heat transfer resistance model and a heat transfer calculation model based on enthalpy difference were established for the heat exchange tubes. Four typical application cases of a low flow rate and a low number

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13

Núñez González, J., A. Beltrán Morales, M. Rivero Corona, and J. Vega Munguía. "Numerical simulation of a polymer melting process using solar energy." Suplemento de la Revista Mexicana de Física 1, no. 2 (2020): 18–24. http://dx.doi.org/10.31349/suplrevmexfis.1.2.18.

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In this work, the melting process of a polymeric material is numerically investigated. In general, the heat required for melting plastics is obtained throughout electrical resistances or by burning fossil fuels. The heat transfer mechanisms of these common practices correspond to conduction and convection, respectively. This work explores the feasibility of using radiation as the primary mechanism of energy supply, which has not been widely studied. The energy to achieve the phase change from solid to liquid can be obtained by concentrated solar energy radiation. The total energy required is c

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14

Zhang, Yining, Huiqin Wang, and Jisheng Zhang. "Application of Graphene-Based Solar Driven Interfacial Evaporation-Coupled Photocatalysis in Water Treatment." Catalysts 15, no. 4 (2025): 336. https://doi.org/10.3390/catal15040336.

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The global shortage of freshwater resources and the energy crisis have propelled solar-driven interfacial evaporation (SDIE) coupled with photocatalytic technology to become a research focus in efficient and low-carbon water treatment. Graphene-based materials demonstrate unique advantages in SDIE–photocatalysis integrated systems, owing to their broadband light absorption, ultrafast thermal carrier dynamics, tunable electronic structure, and low evaporation enthalpy characteristics. This review systematically investigates the enhancement mechanisms of graphene photothermal conversion on photo

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15

Ceglia, Francesca, Adriano Macaluso, Elisa Marrasso, Maurizio Sasso, and Laura Vanoli. "Modelling of Polymeric Shell and Tube Heat Exchangers for Low-Medium Temperature Geothermal Applications." Energies 13, no. 11 (2020): 2737. http://dx.doi.org/10.3390/en13112737.

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Improvements in using geothermal sources can be attained through the installation of power plants taking advantage of low and medium enthalpy available in poorly exploited geothermal sites. Geothermal fluids at medium and low temperature could be considered to feed binary cycle power plants using organic fluids for electricity “production” or in cogeneration configuration. The improvement in the use of geothermal aquifers at low-medium enthalpy in small deep sites favours the reduction of drilling well costs, and in addition, it allows the exploitation of local resources in the energy district

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16

Kerslake, T. W., and M. B. Ibrahim. "Two-Dimensional Model of a Space Station Freedom Thermal Energy Storage Canister." Journal of Solar Energy Engineering 116, no. 2 (1994): 114–21. http://dx.doi.org/10.1115/1.2930498.

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The Solar Dynamic Power Module being developed for Space Station Freedom uses a eutectic mixture of LiF-CaF2 phase-change salt contained in toroidal canisters for thermal energy storage. This paper presents results from heat transfer analyses of the phase-change salt containment canister. A two-dimensional, axisymmetric finite difference computer program which models the canister walls, salt, void, and heat engine working fluid coolant was developed. Analyses included effects of conduction in canister walls and solid salt, conduction and free convection in liquid salt, conduction and radiation

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17

LAPTEV, A. G., and V. A. KLOCHKOVA. "DETERMINATION OF THE EFFICIENCY OF GAS CONDENSATION COOLING IN A DIRECT-FLOW HIGH-SPEED FILM SCRUBBER." Herald of Technological University 27, no. 11 (2024): 164–69. https://doi.org/10.55421/1998-7072_2024_27_11_164.

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To solve engineering problems of design or modernization of scrubbers in various industries and power engineering, the process of gas cooling at contact with a liquid film at downward movement of phases in the regime of strong interaction in contact tubes is considered. The thermal efficiency of gas cooling, the thermal efficiency of heating the liquid film and the mass transfer efficiency of moisture condensation on the interphase surface of the film are written down. To determine the thermal efficiency of gas cooling and moisture condensation, the cellular model of the hydrodynamic flow stru

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18

Sun, Anyang, Kazunori Harada, and Daisaku Nii. "Numerical Model Investigating Heat and Mass Transfer of Wood During the Heating and Cooling Period of Fire." International Journal of Fire Science and Engineering 39, no. 1 (2025): 28–44. https://doi.org/10.7731/kifse.f03f9a8c.

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A numerical model was proposed to analyze the heat and mass transfer process of wood during the entire period of fire including heating and cooling periods. Conservation of enthalpy and mass were considered. Velocities of gas and liquid were calculated by Darcy’s law. The desorption and adsorption of liquid water, pyrolysis of volatile components, burning of combustible pyrolysis gas and glowing of char were considered. Shrinkage of solid and subsequent surface cracking were included in this model. The effect of increasing heat and mass transfer by crack were expressed by additional heat and m

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19

Felix-Contreras, Rafael, Jonathan de la Vega Olivas, Cinthya Dinorah Arrieta-Gonzalez, et al. "Kinetic and Thermodynamic Aspects of the Degradation of Ferritic Steels Immersed in Solar Salt." Materials 17, no. 23 (2024): 5776. http://dx.doi.org/10.3390/ma17235776.

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The study and improvement of the corrosion resistance of materials used in concentrated solar power plants is a permanent field of research. This involves determining their chemical stability when in contact with heat transfer fluids, such as molten nitrate salts. Various studies indicate an improvement in the corrosion resistance of iron-based alloys with the incorporation of elements that show high reactivity and solubility in molten nitrate salts, such as Cr and Mo. This study analyzes the kinetic and thermodynamic aspects of the beginning of the corrosion process of ferritic steels immerse

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20

Anasiei, Ioana, Dumitru Mitrica, Ioana-Cristina Badea, et al. "Characterization of Complex Concentrated Alloys and Their Potential in Car Brake Manufacturing." Materials 16, no. 14 (2023): 5067. http://dx.doi.org/10.3390/ma16145067.

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The paper studies new materials for brake disks used in car manufacturing. The materials used in the manufacturing of the brake disc must adapt and correlate with the challenges of current society. There is a tremendous interest in the development of a material that has high strength, good heat transfer, corrosion resistance and low density, in order to withstand high-breaking forces, high heat and various adverse environment. Low-density materials improve fuel efficiency and environmental impact. Complex concentrated alloys (CCA) are metallic element mixtures with multi-principal elements, wh

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21

Xiaohong, Gui, Song Xiange, Li Tie, Liang Shiqiang, Yuan Dazhong, and Tang Dawei. "Influence of void ratio on phase change of thermal energy storage for heat pipe receiver." Thermal Science 19, no. 3 (2015): 967–76. http://dx.doi.org/10.2298/tsci130627135x.

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In this paper, influence of void ratio on phase change of thermal storage unit for heat pipe receiver under microgravity is numerically simulated. Accordingly, mathematical model is set up. A solidification-melting model upon the enthalpy-porosity method is specially provided to deal with phase changes. The liquid fraction distribution of thermal storage unit of heat pipe receiver is shown. The fluctuation of melting ratio in PCM canister is indicated. Numerical results are compared with experimental ones in Japan. The results show that void cavity prevents the process of phase change greatly.

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22

Chang, Shyy-Woei, Yn-An Tsai, and Cheng-Lin Tsai. "Comparative Thermal Performances between Pumped Thermosyphon Loops with Different Condenser Configurations Using R245fa as Working Fluid." Energies 15, no. 2 (2022): 635. http://dx.doi.org/10.3390/en15020635.

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A pumped two-phase thermosyphon loop is broadly utilized to intensify the cooling duties of electronic chipsets/systems and the effectiveness for harvesting thermal energy. The configuration of a condenser not only affects the heat transfer in the condenser, but also has an effect on the saturation pressures during the boiling and condensation processes to alter the hydrothermal performance of a pumped thermosyphon loop. The influence of the condenser configuration on the hydrothermal performance of a pumped thermosyphon loop is rarely studied. The present study comparatively examined the ther

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23

Nees, F., and Y. S. Pai. "Conjugate heat transfer analysis of the transient thermal discharge of a metallic latent heat storage system." Journal of Physics: Conference Series 2766, no. 1 (2024): 012212. http://dx.doi.org/10.1088/1742-6596/2766/1/012212.

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Abstract Thermal energy storage systems utilizing metallic phase change materials exhibit great potential as a technology for mobile applications, offering high storage densities and high thermal discharge rates. First experimental investigations show the functionality and performance characteristics of this system. For a deeper understanding of the thermal discharge, this paper presents a numerical model and analysis of the transient conjugate heat transfer. For validation of the numerical model, the results of the simulations are compared to the available experimental data. The investigated

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24

Ohkage, Masayuki, Kei-ichi Okuyama, Soichiro Hori, and Tsumugi Ishida. "Heat Shield Properties of Lightweight Ablator Series for Transfer Vehicle Systems with Different Laminated Structures Under High Enthalpy Flow Environments." Aerospace 12, no. 4 (2025): 281. https://doi.org/10.3390/aerospace12040281.

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The thermal protection system of a re-entry vehicle requires a high-heat-resistant heat shield to protect the spacecraft. Most of the ablative materials developed so far have high heat resistance but have technical issues such as long production times. In this study, we propose a new ablative material (LATS/PEEK) consisting of PEEK and carbon felt as a material that can solve these problems. PEEK has excellent properties such as a short production time and its ability to be produced using 3D printer technology. In addition, PEEK can be molded with a variety of fusion bonding methods, so it is

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25

Huang, Peng, Zhi Ming Hao, Wei Fen Li, and Shao Quan Hu. "Finite Element Thermal Analysis of the Packing Container in Fire Environment." Applied Mechanics and Materials 444-445 (October 2013): 1539–44. http://dx.doi.org/10.4028/www.scientific.net/amm.444-445.1539.

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The packing container is used in storage and transport of the high explosive (HE) material. The study concerns the safety of the packing container in fire environment. The spruce wood filled in the packing container can effectively resist heat transfer and protect HE material. The thermal analysis of the packing container in the pool fire environment is presented with the finite element method. When considering the water evaporation and the wood pyrolysis, the enthalpy curve of wood is presented in this study. Heat can be transferred from the fire to the packing container via convection and ra

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26

Krishnan, Shankar, Jayathi Y. Murthy, and Suresh V. Garimella. "A Two-Temperature Model for Solid-Liquid Phase Change in Metal Foams." Journal of Heat Transfer 127, no. 9 (2004): 995–1004. http://dx.doi.org/10.1115/1.2010494.

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Transient solid-liquid phase change occurring in a phase-change material (PCM) embedded in a metal foam is investigated. Natural convection in the melt is considered. Volume-averaged mass and momentum equations are employed, with the Brinkman-Forchheimer extension to the Darcy law to model the porous resistance. Owing to the difference in the thermal diffusivities between the metal foam and the PCM, local thermal equilibrium between the two is not assured. Assuming equilibrium melting at the pore scale, separate volume-averaged energy equations are written for the solid metal foam and the PCM

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27

Li, Jia Lei, Zi Wei Hou, Hao Cheng, Ya Ping Ma, Ai Hua He, and Hua Rong Nie. "Phase Change Microcapsules Shelled with Silica Functionalized with CNTs for Enhanced Thermal Conductivity and Solar Thermal Conversion." Journal of Nano Research 88 (June 9, 2025): 75–87. https://doi.org/10.4028/p-yih64l.

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Advanced phase-change materials (PCMs), as novel energy-storage technologies, offer a practical solution to addressing the global energy crisis by improving both energy efficiency and sustainability. In this study, silica (SiO₂)-shelled phase-change microcapsules functionalized with carboxylated carbon nanotubes (CNTs) were designed and prepared to enhance thermal conductivity, photothermal conversion, and operational durability. The silica shell, featuring a Janus structure with exterior amine groups, facilitates covalent bonding with CNTs, effectively increasing thermal transfer and maintain

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28

Lantmann, Rafael V., André M. S. Mariante, Tiago V. Pinheiro, Eleani M. da Costa, and Carlos A. dos Santos. "Microstructure, Hardness, and Linear Reciprocating Sliding Wear Response of Directionally Solidified Al–(2.5, 3.5, 4.5)Cu–(0.25, 0.50)Cr Alloys." Metals 13, no. 7 (2023): 1178. http://dx.doi.org/10.3390/met13071178.

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Aluminum alloys containing transition metal alloying elements have attracted interest from researchers. The effect of Cr additions of 0.25 and 0.50% on the thermal profile, microstructure, hardness, and linear reciprocating sliding wear response of as-cast hypoeutectic Al–Cu alloys with 2.5, 3.5, and 4.5% Cu (wt.%) was investigated. The binary Al–Cu and ternary Al–Cu–Cr alloys were directionally solidified under upward non-steady state heat transfer conditions using a dedicated solidification apparatus. Thermal analysis based on differential thermal analysis (DTA) and cooling curve profiles wa

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Krishnan, Shankar, Jayathi Y. Murthy, and Suresh V. Garimella. "Analysis of Solid–Liquid Phase Change Under Pulsed Heating." Journal of Heat Transfer 129, no. 3 (2006): 395–400. http://dx.doi.org/10.1115/1.2430728.

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Solid/liquid phase change occurring in a rectangular container with and without metal foams subjected to periodic pulsed heating is investigated. Natural convection in the melt is considered. Volume-averaged mass and momentum equations are employed, with the Brinkman–Forchheimer extension to Darcy’s law used to model the porous resistance. A local thermal nonequilibrium model, assuming equilibrium melting at the pore scale, is employed for energy transport through the metal foams and the interstitial phase change material (PCM). Separate volume-averaged energy equations for the foam and the PC

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Kubačka, Ján, and Tassos G. Karayiannis. "Performance of vacuum-insulated central pipes for deep borehole heat exchangers in geothermal systems." International Journal of Low-Carbon Technologies 19 (2024): 2068–85. http://dx.doi.org/10.1093/ijlct/ctae132.

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Abstract Geothermal energy is considered a promising future energy prospect, with the geothermal well outlet temperature being one of the important parameters affecting possible utilization options. For ground source heat pump applications or direct district heating, using lower temperatures can be acceptable. However, efficient electricity production requires a higher enthalpy gradient, which cannot be achieved without high temperature at the wellhead. The selection of the dry co-axial close-loop deep borehole systems (DBHE) may be, in some cases, very beneficial. The operating performance of

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31

Tabakova, Sonia, François Feuillebois, and Stefan Radev. "Freezing of a supercooled spherical droplet with mixed boundary conditions." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 466, no. 2116 (2009): 1117–34. http://dx.doi.org/10.1098/rspa.2009.0491.

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The freezing of a supercooled droplet occurs in two steps: recalescence, that is, a rapid return to thermodynamic equilibrium at the freezing temperature leading to a liquid–solid mixture and a longer stage of complete freezing. The second freezing step can be modelled by the one-phase Stefan problem for an inward solidification of a sphere, assuming the droplet to be spherical. A convective heat transfer with the ambient immiscible fluid is modelled by a mixed boundary condition on the outer surface of the droplet. This condition depends on the Biot number (ratio of the heat transfer resistan

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Ganiev, I. N., F. A. Aliev, H. O. Odinazoda, A. M. Safarov, and J. H. Jayloev. "Heat capacity and thermodynamic functions of aluminum conductive alloy E-AlMgSi (Aldrey) doped with gallium." Izvestiya Vysshikh Uchebnykh Zavedenii. Materialy Elektronnoi Tekhniki = Materials of Electronics Engineering 22, no. 3 (2020): 219–27. http://dx.doi.org/10.17073/1609-3577-2019-3-219-227.

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Aluminum — a metal whose scope of application is constantly expanding. At present, aluminum and its alloys in a number of areas successfully displace traditionally used metals and alloys. The widespread use of aluminum and its alloys is due to its properties, among which, first of all, low density, satisfactory corrosion resistance and electrical conductivity, ability to apply protective and decorative coatings should be mentioned. All this, combined with the large reserves of aluminum in the earth’s crust, makes the production and consumption of aluminum very promising. One of the promising a

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33

SHA, Minggong, Yuri A. UTKIN, Olga V. TUSHAVINA, and Polina F. PRONINA. "EXPERIMENTAL STUDIES OF HEAT AND MASS TRANSFER FROM TIP MODELS MADE OF CARBON-CARBON COMPOSITE MATERIAL (CCCM) UNDER CONDITIONS OF HIGH-INTENSITY THERMAL LOAD." Periódico Tchê Química 17, no. 35 (2020): 988–97. http://dx.doi.org/10.52571/ptq.v17.n35.2020.81_sha_pgs_988_997.pdf.

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Carbon-carbon composite materials are characterized by high heat resistance and thermostability for which they, in most of their physical and mechanical characteristics, can be attributed to the most promising materials. Approximately 81% of all carbon-carbon composite materials are used for the manufacture of brake rotors for aircraft, 18% – in space rocket technology, and only 1% – for all other areas of application. While the need for composites for rocket and space technology is constantly decreasing – the volume of production of brake disc rotors for aircraft is steadily growing, and ther

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Zhang, C., A. C. M. Sousa, and J. E. S. Venart. "The Numerical and Experimental Study of a Power Plant Condenser." Journal of Heat Transfer 115, no. 2 (1993): 435–45. http://dx.doi.org/10.1115/1.2910696.

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A numerical and experimental study to evaluate the performance of a power plant condenser has been carried out. Numerically, physically relevant effects are taken into consideration through a quasi-three-dimensional approach. The equations governing the conservation of mass, momentum, and air mass fraction are solved in primitive variable form using a semi-implicit consistent control-volume formulation in which a segregated pressure correction linked algorithm is employed. The modeling of the condenser geometry, including tube bundle and baffle plates, is carried out based on a porous medium c

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Nam, Seungkyun, Chan-Yang Lee, Soon-Mi Shim, Dong-Un Lee, and Suyong Lee. "Functional Characterization of Marigold Powder as a Food Ingredient for Lutein-Fortified Fresh Noodles." Applied Sciences 11, no. 2 (2021): 861. http://dx.doi.org/10.3390/app11020861.

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Marigold powder was utilized as a food ingredient to produce lutein-fortified fresh noodles for eye health, and its functionalities were characterized in terms of thermo-rheological, structural, and antioxidant properties. The pasting parameters and starch-gelatinization enthalpy values of wheat flour had a tendency to decrease with increasing levels of marigold powder. The use of marigold powder led to decreases in the storage and loss moduli of wheat flour pastes by weakening their cellular microstructure, which was confirmed by the scanning electron microscopic images. When marigold powder

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Dutkowski, Krzysztof, Marcin Kruzel, and Martyna Kochanowska. "Transition Boundary from Laminar to Turbulent Flow of Microencapsulated Phase Change Material Slurry—Experimental Results." Materials 17, no. 24 (2024): 6041. https://doi.org/10.3390/ma17246041.

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An ice slurry or an emulsion of a phase change material (PCM) is a multiphase working fluid from the so-called Latent Functional Thermal Fluid (LFTF) group. LFTF is a fluid that uses, in addition to specific heat, the specific enthalpy of the phase change of its components to transfer heat. Another fluid type has joined the LFTF group: a slurry of encapsulated phase change material (PCM). Technological progress has made it possible for the phase change material to be enclosed in a capsule of the size of the order of micrometers (microencapsulated PCM—mPCM) or nanometers (nanoencapsulated PCM—n

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Eren, Ogulcan, Alhaji M. Kamara, Huseyin Kursad Sezer, and Sundar Marimuthu. "Synthesis of Aluminium Nitride-Based Coatings on Mild Steel Substrates Utilising an Integrated Laser/Sol–Gel Method." Photonics 11, no. 4 (2024): 382. http://dx.doi.org/10.3390/photonics11040382.

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The field of protective coatings for industrial applications is continuously evolving, driven by a need for materials that offer exceptional hardness, enhanced wear resistance, and low friction coefficients. Conventional methods of coating development, such as physical vapour deposition (PVD) and chemical vapour deposition (CVD), often face challenges like the necessity of vacuum conditions, slow growth rates, and weak substrate adhesion, leading to inadequate interface bonding. This study introduces a novel approach utilising an integrated laser/sol–gel method for synthesising aluminium nitri

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Donskoy, I. G. "Numerical simulation of the melting process of a cylindrical sample with a localized heat source." iPolytech Journal 28, no. 4 (2025): 563–72. https://doi.org/10.21285/1814-3520-2024-4-563-572.

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The work set out to determine the conditions for the onset of melting and complete melting of the sample (in a stationary setting), as well as to study the dynamic modes of propagation of the melting front at different thermophysical parameters (heating and cooling intensity, change in material properties during melting, geometric characteristics of the sample). A numerical model of the heat conduction process in a heterogeneous medium is used as a research tool. For the numerical solution, non-stationary one-dimensional heat transfer equations are reduced to a differential form, taking the ph

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Isakhodjayev, Kh, F. Mukhtarov, D. Kodirov, and I. Toshpulatov. "Development of a laboratory nozzle chamber installation for the humidification of buildings." IOP Conference Series: Earth and Environmental Science 939, no. 1 (2021): 012025. http://dx.doi.org/10.1088/1755-1315/939/1/012025.

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Abstract The nozzle chamber, in which water is sprayed into the air stream using mechanical nozzles, is the main unit for these processes in central air conditioning systems (AHUs). The types of nozzles used do not have a sufficiently high effect of interfacial surface forming due to increased metal usage and the broad total dimensions of certain chambers, i.e., they do not have intensive heat and mass transfer. The authors performed testing of the apparatus in the direct iso-enthalpic air cooling mode to improve the performance of the nozzle chamber. Thus, the experiments conducted confirm th

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Gudlaugsson, Eythor, Angelika Humbert, Thomas Kleiner, Jack Kohler, and Karin Andreassen. "The influence of a model subglacial lake on ice dynamics and internal layering." Cryosphere 10, no. 2 (2016): 751–60. http://dx.doi.org/10.5194/tc-10-751-2016.

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Abstract. As ice flows over a subglacial lake, the drop in bed resistance leads to an increase in ice velocities and a draw down of isochrones and cold ice. The ice surface flattens as it adjusts to the lack of resisting forces at the base. The rapid transition in velocity induces changes in ice viscosity and releases deformation energy that can raise the temperature locally. Recent studies of Antarctic subglacial lakes indicate that many lakes experience very fast and possibly episodic drainage, during which the lake size is rapidly reduced as water flows out. Questions that arise are what ef

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Gudlaugsson, E., A. Humbert, T. Kleiner, J. Kohler, and K. Andreassen. "The influence of a model subglacial lake on ice dynamics and internal layering." Cryosphere Discussions 9, no. 4 (2015): 3859–86. http://dx.doi.org/10.5194/tcd-9-3859-2015.

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Abstract. As ice flows over a subglacial lake, the drop in bed resistance leads to an increase in ice velocities and a subsequent draw-down of isochrones and cold ice from the surface. The ice surface flattens as it adjusts to the lack of resisting forces at the base. The rapid transition in velocity induces changes in temperature and ice viscosity, releasing deformation energy which raises the temperature locally. Recent studies of Antarctic subglacial lakes indicate that many lakes experience very fast and possibly episodic drainage, during which the lake size is rapidly reduced as water flo

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42

Sledkov, Ruslan M., Valery Ye Karnaukhov, Oleg Ye Stepanov, Mark M. Bedretdinov, and Igor A. Chusov. "Results of validation and cross-verification of the ROK/B design code on the problem of loss of cooling in the spent fuel pool *." Nuclear Energy and Technology 8, no. 2 (2022): 107–13. http://dx.doi.org/10.3897/nucet.8.87809.

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The procedures of validation and cross-verification of the newly developed computational code ROK/B are described. The main problem solved using the ROK/B code is the substantiation by calculation of the coolant density in the spent fuel pool (SFP) and the temperature regime of the fuel assemblies during a protracted shutdown of the cooling systems (break in the supply of cooling water). In addition to the above, it is possible to use the ROK/B code to carry out calculation of an accident with the discharge of the coolant from the SFP with simultaneous prolonged shutdown of the cooling systems

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43

Sledkov, Ruslan M., Valery Ye. Karnaukhov, Oleg Ye. Stepanov, Mark M. Bedretdinov, and Igor A. Chusov. "Results of validation and cross-verification of the ROK/B design code on the problem of loss of cooling in the spent fuel pool." Nuclear Energy and Technology 8, no. (2) (2022): 107–13. https://doi.org/10.3897/nucet.8.87809.

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The procedures of validation and cross-verification of the newly developed computational code ROK/B are described. The main problem solved using the ROK/B code is the substantiation by calculation of the coolant density in the spent fuel pool (SFP) and the temperature regime of the fuel assemblies during a protracted shutdown of the cooling systems (break in the supply of cooling water). In addition to the above, it is possible to use the ROK/B code to carry out calculation of an accident with the discharge of the coolant from the SFP with simultaneous prolonged shutdown of the cooling systems

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44

Arulanantha Samy, S., T. Shanmuganathan, and J. Godwin John. "Discussions about the Thermodynamic Entropy Property and its Existence in Vehicle Dynamics of Automobiles for Improving the Mileage." Applied Mechanics and Materials 812 (November 2015): 118–23. http://dx.doi.org/10.4028/www.scientific.net/amm.812.118.

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The recent vehicle management systems have been developing to improve the quality of the combustion process and transmission systems. In thermodynamic approach, the water molecule can exists in different phases like ice, water, wet steam, dry steam, and superheated steam. The phase change occurs in the steam formation process can be compared to the various stages of any vehicle dynamic system such starting, idling, normal speed, high speed and very high speed. There may be an identical value in the increment of energy level in both steam formation process and any vehicle dynamic system. Thermo

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Liu, Xiaochen, Xiaohua Liu, Tao Zhang, and Ying Xie. "Experimental analysis and performance optimization of a counter-flow enthalpy recovery device using liquid desiccant." Building Services Engineering Research and Technology 39, no. 6 (2018): 679–97. http://dx.doi.org/10.1177/0143624418780852.

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The liquid desiccant enthalpy recovery is an efficient way to save energy in air-conditioning systems. In this study, a counter-flow liquid desiccant enthalpy recovery device was proposed and experimentally analyzed. Enthalpy transfer capacity, enthalpy efficiency and pressure drop per height of packing were used as indices to describe its performances. Based on the experiment results, the heat and mass transfer model of a packed tower was used to simulate and optimize the performance of this device. The maximum enthalpy efficiency and enthalpy transfer capacity were achieved when the optimal

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Jeong, Dahai, Brian K. Haus, and Mark A. Donelan. "Enthalpy Transfer across the Air–Water Interface in High Winds Including Spray." Journal of the Atmospheric Sciences 69, no. 9 (2012): 2733–48. http://dx.doi.org/10.1175/jas-d-11-0260.1.

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Abstract Controlled experiments were conducted in the Air–Sea Interaction Saltwater Tank (ASIST) at the University of Miami to investigate air–sea moist enthalpy transfer rates under various wind speeds (range of 0.6–39 m s−1 scaled to equivalent 10-m neutral winds) and water–air temperature differences (range of 1.3°–9.2°C). An indirect calorimetric (heat content budget) measurement technique yielded accurate determinations of moist enthalpy flux over the full range of wind speeds. These winds included conditions with significant spray generation, the concentrations of which were of the same

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Kim, Nae-Hyun. "Moisture Diffusion Characteristics of a Paper Membrane Used for a Cross Flow Enthalpy Exchanger." International Journal of Air-Conditioning and Refrigeration 26, no. 03 (2018): 1850023. http://dx.doi.org/10.1142/s2010132518500232.

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An enthalpy exchanger is the key component of an enthalpy recovery ventilator, which is installed in apartments or office buildings to maintain proper indoor air quality. In this study, the performance data of the enthalpy exchanger made of paper membrane were obtained for wide range of temperature and humidity conditions. Using the data, diffusion coefficient correlations were developed through modeling of heat and moisture transfer. The heat transfer effectiveness was relatively constant independent of outdoor temperature condition. On the other hand, the moisture transfer effectiveness was

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Ngo, Chinh Thi. "THERMOCHEMICAL PARAMETERS OF ERGOTHIONEINE: A DFT STUDY USING M06, WB97XD AND TPSSTPSS METHODS." Vietnam Journal of Science and Technology 54, no. 2C (2018): 299. http://dx.doi.org/10.15625/2525-2518/54/2c/11850.

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Antioxidant properties of ergothioneine (ESH) have been investigated via hydrogen atomtransfer (HAT), single electron transfer-proton transfer (SET-PT) and sequential proton losselectron transfer (SPLET) mechanisms. Three new DFT methods including M06, WB97XD andTPSSTPSS at the 6-311++G(2df,2p) basis set were used to compute the thermochemicalparameters of ESH in the gas phase. Based on these methods, bond dissociation enthalpy (BDE),ionization energy (IE), proton dissociation enthalpy (PDE), proton affinity (PA) and electrontransfer enthalpy (ETE) were calculated. The results were also compar

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LEE, EUL-JONG, NAE-HYUN KIM, GIL-SUB SONG, and JUNG-PYO LEE. "HEAT AND MOISTURE TRANSFER CHARACTERISTICS OF A PLATE-TYPE ENTHALPY EXCHANGER MADE OF PAPER." International Journal of Air-Conditioning and Refrigeration 19, no. 01 (2011): 85–92. http://dx.doi.org/10.1142/s2010132511000429.

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In this study, heat and moisture transfer data of an enthalpy exchanger were obtained varying the indoor and outdoor condition systematically. At the same time, equilibrium water content ratios of the membrane were measured. It is shown that equilibrium water content ratio of the membrane increases with the increase of relative humidity. The effect of temperature on equilibrium water content ratio, however, is rather complex. It decreases with the increase of temperature to a certain value, and then increases with further increase of temperature. Moisture transfer effectiveness of the enthalpy

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Roth, Michal. "Enthalpy of transfer in supercritical fluid chromatography." Journal of Chromatography A 543 (January 1991): 262–65. http://dx.doi.org/10.1016/s0021-9673(01)95778-4.

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