bluuebunny/crossref_metadata_2025_split huggingface dataset:
Water reservoir techniques using remote sensing and GIS: a literature survey
Authors: Ali M H , Mohammed F G , Al-Saady Y I 
Published: October 2024

Abstract
The issue of storing flood waters caused by rains and river floods is very important to address the problems of drought. This study reviewed the latest research to address the problems of water scarcity and conservation with advanced methods. these study methodologies range from employing Geographic Information Systems Programs to handle and analyses remote sensing data to incorporating contemporary techniques to enhance morphometric analysis, where researchers employed various analytical techniques. To determine if these watersheds are appropriate for storing water, some studies have preferred Multi-Criteria Decision-Making models (MCDM), more especially the fuzzy analytical hierarchy (FAHP) Fuzzy Analytical Hierarchy Process. Others have employed techniques for hydrological analysis, such as the ArcGIS program’s Arc hydrology tools. Researchers reached a consensus regarding the fundamental parameters required for morphometric analysis in the demarcation of watersheds, notwithstanding methodological variances. Additionally, many researchers have argued the importance of using the Shuttle Radar Topography Mission Digital Elevation Model (SRTM-DEM) mission and the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER DEM) in morphometric and hydrologic studies.
Effect of Magnesium Hydroxide on the Thermal Stability, Latent Heat and Flammability Properties of composite material based on Phase Change Materials
Authors: Othmen Marwa , Tlili Nawel , Alkan Cemil , Hannachi Ahmed 
Published: October 2024

Abstract
Polyurethane-Phase Change Materials (PU-PCM) composites are used for thermal regulation aiming to conserve and efficiently manage thermal energy. These materials combine the properties of PU, such as low thermal conductivity, low density and excellent mechanical properties as a thermal insulator, with the benefits of PCM allowing thermal energy storage, which greatly reduce energy consumption in heating and cooling. Adding a flame retardant to the PU-PCM composition improves fire resistance. The objective of this study is the preparation and characterization of a composite material based on PU rigid foam containing 30% by mass of commercial paraffin waxes as PCM, together with magnesium hydroxide as flame retardant. A series of samples were prepared by incorporating different percentages of Mg(OH)2, ranging from 1 % to 5 %, with and without the PCM. Various thermal and chemical characterization tests were carried out. The results indicate that the structure of the PU cells is not affected by the increase of the Mg(OH)2 incorporation rate. In terms of thermal properties, the addition of 1% flame retardant increases the latent heat from 25.9 J/g to 39.68 J/g. As the amount of Mg(OH)2 incorporated increases, the flame retardancy increases.
Modelling of Control Strategy for Sun Tracking of Concentrated Photovoltaic (CPV) Systems and Performance Analysis of Optical Losses Due to Tracking Errors.
Authors: Imane Ourraoui , Ali Ahaitouf 
Published: October 2024

Abstract
Among the wide range of solar energy technologies, CPV remains a promising technology worldwide. The photovoltaic concentrator maximizes its efficiency through the use of optical concentration systems. But since optical concentration depends on direct solar radiation, maximizing the quantity of useful solar radiation received requires using a solar tracker that tracks the direction of the sun. To maximize collector efficiency, it’s crucial to choose tracking systems that align with the optical concentration factor. Inadequate focusing of direct solar radiation on the concentrator’s receiver can result in high optical losses, regardless of quality. This paper focuses on improving the accuracy and lowering the cost of the tracker trajectory generation strategy. A sun tracker simulator is first developed, allowing for the investigation of the impact of sun tracking performance a traditional control strategy is initially implemented that uses an astronomical calculation to follow the path of the sun. This strategy uses a sun position algorithm from the National Renewable Energy Laboratory to generate the tracker trajectory and track the sun’s path. When tested on the simulator, as a result, this strategy demonstrated a level of accuracy that ensured a good balance between intricacy and accuracy. Then, An investigation study was conducted to determine how this solar tracker’s precision might affect its optical efficiency. the optical losses resulting from the tracking were calculated using the provided location, The optical loss calculated for this collector’s maximum tracking error is approximately 9%. The research methodology showed that the tracker precision satisfied the requirements of the optical system under study.
A Twin Spiral Coil Phase Transfer Heat Exchanger for Storing Heat Should Be Designed and Tested in The Lab.
Authors: Sayyid Jaafar Hussein , Allawi Assem S. , Al-Shohani Wisam A. M. 
Published: October 2024

Abstract
This in-depth study of thermal energy storage (TES) systems examines their function in resolving time, temperature, power, and location problems within the immense energy system design. With its incredible growth, TES creates a shadow over the future, projecting optimism for a better economy and more reliable energy infrastructure. The study is concentrated on a state-of-the-art heat exchanger that has circular double coils with various diameters, with a reliance on charging process amplification. The trial stage is decorated like a well-coordinated ensemble, integrating shell-and-tube design together with intense evaluation of varied tube morphologies, HTF flow designs, and protecting processes. The TES device effortlessly reveals its many components, such as a gas heater, control valves, a pump, a circular container with spiral HTF tubes, and a chorus of music. The PCM heat storage unit’s performance improved in two resonant cases that evaluated the effect of the HTF input temperature and coil charge in great detail. Case 2 and Case 1’s connections exhibit the significant heat absorption and PCM liquification by creating a web of various temperature differences while charging. With its improved temperature performance and straightforward design, Case 2 displays rapid removal and quicker charging periods. In addition, the study examines the HTF input parameters, which cast light on the constant HTF departure temperatures and demonstrate the importance of temperature during the charging opera. While the total energy storage rate rises with increasing temperatures, the expected scores are in accord with the mood fluctuations at the beginning and end of HTF. This review functions as a folder of vital insights, analyzing notes towards constructing PCM charging processes for higher energy storage efficiency - ultimately placing a limelight on the endless possibilities that TES systems predict in the present spectrum of energy uses.
Modulation of Residual Current on Impacts of Shoreline Changes in the Yangshan Deepwater Harbor
Authors: Mao Wei , Guo Wenyun 
Published: October 2024

Abstract
Coastal land reclamation projects significantly alter tidal wave propagation and residual flow structures. This study focuses on the Yangshan Deepwater Harbor (YDH) in China, aiming to scrutinize the effects of construction activities on residual flow patterns employing the Finite Volume Community Ocean Model (FVCOM). By calculating Lagrangian residual currents across different tidal periods, we analyzed alterations in flow patterns and velocity distribution pre- and post-construction. The research findings reveal that, although the residual flow direction in the harbor and the southern sea area remains largely unchanged from the pre-construction phase, the northern sea area has experienced a shift in residual flow direction. It is noteworthy that after the implementation of the project, the residual flow at the East Entrance was greatly weakened. This study underscores that coastal constructions can lead to remarkable influence on residual currents and emphasizes the necessity for thorough hydrodynamic assessments in the planning and implementation stages of coastal constructions.
Effect of Axial Clearance Between Turbine and Guide Wheel on Hydraulic Performance of Mine Borehole Turbo Generator
Authors: Zhang Xiaoze 
Published: October 2024

Abstract
In order to study the influence law of axial clearance between turbine and guide wheel on the performance of mine turbine generator. The three-dimensional unsteady internal flow and external characteristics of 8 kinds of turbine generator models with different coaxial clearance are calculated. The results show that: As the axial clearance coefficient between the turbine and the guide wheel increases, the pressure loss at the inlet and outlet of the guide wheel and turbine increases gradually, the torque and shaft power of the turbine are reduced, the hydraulic efficiency of turbine generator decreases gradually; The hydraulic efficiency of the turbine increases first and then decreases. Considering the external and internal flow characteristics comprehensively, the axial clearance coefficient between the turbine and the guide wheel is between 0.12 and 0.15, and the turbine generator performance is the best. It can provide some reference for the design optimization of Mine Borehole Turbo Generator.
Design and Analysis of High Precision Flow Proportional Regulating Valve Based on Piezoelectric Drive
Authors: Hu Xiaonan , Tian Yun , Xie Wen , Guo Menglei , Huang Xin , Li Jingmin , Chen Yuping 
Published: October 2024

Abstract
With the development of micro-satellite propulsion system towards high precision, light and miniaturization, higher requirements are put forward for precise adjustment of propulsion system. Based on the principle of piezoelectric micro-displacement drive, this paper designs a light and small proportional flow control valve, adopts compliant amplification mechanism, develops the throttling design of small flow in the form of valve needle, analyzes the flow characteristics in the proportional adjustment process under different parameters, and realizes the micro-flow control ability with a flow control range of 0∼2mg/s and a flow control accuracy better than 3%. This design and analysis method can meet the needs of large-scale and high-precision flow control, and provide technical support for subsequent engineering applications.
Study on the Characteristics of Tidal Current Velocity in Estuarine and Bay Areas
Authors: Wang Ruifeng , Cheng Wenlong , Yang Yuanping , Zhang Zhiyong , Zeng Jian 
Published: October 2024

Abstract
In estuarine and bay regions, reciprocating tidal currents frequently constitute the predominant hydrodynamic forces. Nonetheless, there exists a paucity of research concerning the hydrodynamic characteristics under intricate tidal conditions. This study employs tidal current data collected from nine sites within the Yellow River Estuary and Hangzhou Bay to examine the periodic characteristics of tidal currents, the vertical velocity distribution, and the attributes of ebb and flood peak velocities. The study revealed that the Yellow River Estuary and Hangzhou Bay predominantly exhibit nearly symmetrical reciprocating tidal currents. Nevertheless, certain regions within Hangzhou Bay also demonstrate asymmetrical tidal currents. The vertical velocity distribution throughout various phases of a single tidal cycle generally adheres to the characteristics described by the SOULSBY distribution. The peak velocities of ebb and flood tides are correlated with the rate of change in water depth (hm/tm), and an equation for calculating these peak velocities has been derived through fitting data.
Research on the Internal Flow Properties of the Bending Pipeline Based on the CFD
Authors: Zhang Xiaoze 
Published: October 2024

Abstract
Pipeline connection is the main connection of hydraulic parts. For the study of pipe diameter, turning Angle and the turning radius of pipe, the influence law of the internal flow characteristics. this paper adopts CFD 3D simulation technology to explore the influence law of 5 kinds of bending radius, 6 kinds of bending Angle and 4 kinds of pipe diameter on the pressure loss of the pipeline. The results show that there are pressure difference and velocity difference in the inner wall and the outer wall of the bend, due to the impact of the fluid inertia force on the bend, when the fluid flows in the bend. As bending radius and pipe diameter increases, the pressure difference and speed difference of the inner and outer walls at the turning point of the pipeline are reduced, the local pressure loss at the bending is reduced, the internal pressure loss of the pipeline is reduced, and the flow is more uniform. With the increase of bending angle, the pressure difference and velocity difference of the inner and outer walls of the pipeline bending increase, the local pressure loss increases, and the overall pipeline pressure loss increases. The research results of this paper can provide some reference for pipeline hydraulic design and optimization.
Simulation Analysis of Loss of Coolant Accidents Based on CNIFA Program
Authors: Tian Haijing , Huang Xiaoyun , Tian Haiman 
Published: October 2024

Abstract
The loss of coolant accident in the primary pipeline of a reactor is a typical accident in the safety analysis of nuclear power plants, and it is one of the accidents with a high probability of occurrence. Due to the extremely complex structure of the lower space of the containment vessel, it increases the complexity of fluid flow during a loss of coolant accident. This article is based on the internal water flooding analysis simulation software CNIFA of a nuclear power plant to simulate the water flooding of a rupture in the main pipeline heat pipe section of a power plant, and to conduct a comprehensive water flooding scenario simulation for this working condition. The quantitative information collected during the simulation process, including dynamically displayed water volume, water level, and their changes over time, facilitate emergency response personnel to choose the correct response plan in advance, it can also provide more accurate basis for various specialties in design analysis.
Deformation and Stress Prediction of Tank under Uneven Settlement
Authors: Wu Gang , Xie Shuyi , Zhou Huiping , Luo Jinheng , Long Yan , Zhang Shuxin 
Published: October 2024

Abstract
The differential settlement of crude oil tank foundations can lead to deformation and stress concentration, posing significant risks to the safe operation of storage tanks. This study developed a finite element model for a large crude oil storage tank subjected to harmonic settlement to address the issue of non-uniform settlement around the tank. The model systematically varied the tank’s diameter-to-thickness ratio, height-to-diameter ratio, and the wind beam’s relative bending stiffness. The research examined the impact of these three factors on the maximum dimensionless radial displacement at the tank top and the maximum equivalent stress at the tank bottom. A predictive method was proposed for estimating the radial displacement at the tank top and the equivalent stress at the tank bottom under uneven settlement, offering valuable insights for assessing the integrity of large tanks in such conditions.
Hydroboration of Acid Anhydrides Catalyzed by Aluminumhydride Supported by β-diketimines Ligand
Authors: Zeng Siyuan , Wu Jin , Yang Zhi 
Published: October 2024

Abstract
The hydroboration reaction was historically catalyzed by transition metals. Nevertheless, the known aluminum hydride catalyst supported by β-diketimines ligand for catalyzing the hydroboration reaction of acid anhydride compounds reduces pollution and the cost associated with those heavy metals while broadening the synthesis pathway of organoboranes. Most importantly, this innovative substance has not been previously reported. In this regard, this research investigates the excellent performance of the aluminum hydride catalyst in the hydroboration of acid anhydrides, observing short reaction times and high yields. Furthermore, we found long-term stability as well as recyclability in LAlH2, proven to be an environmentally friendly green catalyst.
Supercritical Methane Adsorption Characteristics and Pore Structure Characteristics of Deep Middle Rank Coal
Authors: Li Qi , Wu Yong , Qiao Lei 
Published: October 2024

Abstract
In order to accurately analyze the adsorption characteristics, pore structure, and fractal law of deep middle rank coal, high-pressure isothermal adsorption tests based on magnetic levitation high-pressure thermobalance and pore structure tests based on mercury intrusion method were carried out on coal samples collected from typical kilometer level deep wells. The fractal law of sponge model was studied. The results showed that: a. The weight method adsorption test showed “excess adsorption” phenomenon with the increase of equilibrium pressure, and the modified Gibbs surface excess adsorption theory was in line with the Langmuir adsorption model; b. The distribution of macropore volume in deep middle rank coal accounts for a dominant proportion of 57.44% to 62.47%, and the proportion of microporous specific surface area reaches 72.96% to 74.27%, indicating that microporous adsorption capacity is the strongest; c. The pore structure parameters and adsorption constants exhibit strong nonlinear characteristics.
Finite Element Analysis of LED Heat Dissipation Performance Based on Graphene Composites
Authors: Zhao Xia , Dou Meng , Zhang Zheng , Shi Qufei , Xiu ZhiJuan 
Published: October 2024

Abstract
With the gradual development of integrated circuits to thin, high-performance and versatile of electronic products is becoming more and more powerful, and its integration and assembly density continue to improve, which will lead to the increase of its working power consumption and heat. If not timely treatment of heat dissipation problems, which will lead to heat concentration in the diode PN junction, it will reduce the service life of LED lights, and in severe cases, it will even burn the LED device. Therefore, it is crucial to improve heat dissipation efficiency of LED and reduce the junction temperature of chip. An LED structure with aluminum material and an LED structure with graphene material are analyzed by finite element method to study the heat dissipation efficiency of the graphene material. The results reveal that the heat dissipation effect of high conductivity graphene composites provides a convenient evaluation method for the subsequent use of the new materials. The research in this paper shows that the software simulation method can effectively analyze the thermal conductivity of practical engineering applications.
Evaluation and Research on Correlation for Spray Cooling
Authors: She Yangzi 
Published: October 2024

Abstract
Spray cooling is influenced by many related parameters, making analysis of heat transfer mechanisms and prediction of cooling performance challenging. After summarizing and analyzing fifteen different forms of correlation in spray cooling literature, it appears that there are four expressions for spray cooling correlation. 2989 experimental data under different experimental conditions in twelve studies were collected to form an experimental database to evaluate the prediction of correlations. The prediction accuracy of Nusselt number correlations based on droplet diameter is considered the best, while that of correlations based on dimensionless heat flux is considered the worst. The factor analysis method was used to analyze the prediction differences of correlations and investigate the correlation between parameters and the heat transfer process. We found that the correlation with the best evaluation accuracy must contain more parameters with high correlation. A new correlation was derived based on this conclusion to predict the data better.
Development of a georeferenced atlas of energy renovation in residential buildings using GIS tool
Authors: Belmaaziz Mohamed , Cadoni Gianluca 
Published: October 2024

Abstract
This paper presents a method for modelling the energy needs for heating the residential building stock on a macro scale. The method is based on the use of Geographic Information Systems (GIS) tools to manage various existing geolocalised databases and the collection of field data. It combines the calculation of energy demand with the estimation of solar gains received by the building envelope. In order to estimate the heat energy balance, a description of the building geometry is necessary. The geometrical characteristics of the envelope are extracted from the building entities information available in the spatial database. These parameters are then enriched and cross-referenced with other data gathered from the government’s complex taxation files. The TABULA buildings typology was chosen because it is an exhaustive European classification adapted for use in GIS utilities. The objective of this work is to produce a georeferenced atlas that can identify potential energy savings on large zones, such as urban areas. An understanding of energy consumption at this scale is crucial for the effective management of massively scaled energy-saving solutions. The atlas will promote energy efficiency in the residential sector and guide environmental policy measures by identifying priority areas for renovation.
House FIRSTLIFE in student contest and in Living Lab
Authors: Tywoniak Jan , Malík Zdenko , Sojková Kateřina 
Published: October 2024

Abstract
The paper comments on selected measurements and observations related to the FIRSTLIFE house demonstration unit, which was prepared by the team of the Czech Technical University for the international competition Solar Decathlon Europe 21/22 with its final at the Solar Campus in Wuppertal, Germany. The paper comments on the measurement results obtained during the competition in the field of building physics (thermal and moisture comfort, measurement of air permeability, measurement of sound insulation of the perimeter wall and dynamic co-heating test). The second part of the paper describes selected follow-up activities. For the purposes of the Living Lab, eight of the competition houses remained on the Solar Campus for at least another 3 years. This allowed long-term monitoring and targeted experiments to be carried out and some of the earlier measurements to be repeated under different climatic boundary conditions. For this phase, additional sensors were added in the Czech house, such as a meteorological station and temperature and heat flow sensors in the perimeter wall. Part of the data comes directly from the building management system. The paper comments on first results from Living Lab period.