bluuebunny/crossref_metadata_2025_split huggingface dataset:
Calculation of electric energy savings and simulation of tank operation with variable extraction of steam and liquid phases of propane-butane mixtures
Authors: Rulev A V , Kuznezov S S , Sevostiyanov V O 
Published: March 2021

Abstract
Currently, when consumers use various categories of propane-butane mixtures of liquefied petroleum gas as the main or backup energy carrier, natural and artificial regasification systems based on electric or direct fire evaporators with intermediate heat transfer agent or solid-state intermediate heat transfer agent of various evaporation capacity, which operate depending on the design in various evaporation modes, are widely used. An important element for reducing energy consumption in the artificial liquefied petroleum gas regasification systems is the switching of tank to the combined regasification mode. The combined cycle provides two main periods of tank operation: the initial period with natural regasification of liquefied gas in the day tank, ground tube evaporator, and the subsequent period with artificial regasification of the propane-butane mixture in the evaporator with an intermediate heat transfer agent. For the purpose of theoretical justification of the proposed cycle, a mathematical model of combined regasification of liquefied petroleum gases was developed, which comprehensively takes into account the main periods of tank operation: with natural regasification mode in the day tank, ground heat exchanger and artificial regasification mode in the evaporator. The results of the conducted research show that the implementation of the combined regasification cycle in the liquefied gas supply can significantly reduce the energy costs of its evaporation, increases the energy efficiency of liquefied petroleum gas supply systems and provides an average annual savings of 33.7% in electric energy for regasification.
Research and development of ice storage in building energy supply system
Authors: Yavorovsky Y V , Sultanguzin I A , Khristenko B A , Kruglikov D A , Chaikin V Y 
Published: March 2021

Abstract
In this work, the most suitable type of heat exchanger for an ice accumulator was determined based on studies of the dynamics of ice growth on heat exchange surfaces of various shapes and its configuration was determined. The calculation of the accumulating capacity of the ice accumulator has been made. The task is set to create a mathematical model in the Ansys Fluent and TRNSYS environment, as well as BIM and BEM models of the main elements of the system. A ready-made design solution for the introduction of an ice storage device into the existing heat supply system of an energy-efficient house with an assessment of the cost of costs and required materials has been developed. An assessment was made of the cost of various solutions for heating a house with a load of 10 kW. A test bench layout has been developed for monitoring and analyzing the operation of the system, as well as the impact on the environment. The functionality of the current system for recording and processing the operating parameters of the equipment allows not only to confirm the correctness of calculations and the operability of the mathematical model, but also to assess the impact of the ice accumulator on the environment.
Studying the kinetics mechanism of emulsified petroleum products recovery from waste waters in dynamic conditions
Authors: Starostina I V , Polovneva D O , Porozhnyuk E V , Shevtsova R G 
Published: March 2021

Abstract
Petroleum products belong to the most common man-made pollutants of surface watercourses, and sometimes even underground drinking water sources. They get to the environment at the extraction and transportation of oil and oil products, as well as at industrial disasters. The oil-contaminated sewage waters produce the general-toxic, embryotoxic and carcinogenic effect, and weaken the immune system. To purify wastewaters from petroleum products the most efficient and environmentally friendly is the sorption method. This paper considers using a carbon-containing material, obtained by thermal modification at 450°C of waste kieselguhr sludge from vegetable oil extraction industry, as petroleum sorbent. The designed sorbent is characterized with mesoporous structure, high hydrophobic properties and the presence of oxygen-containing functional groups – carboxyl, hydroxyl and lactone – on the carbon layer surface. Research has been carried out in purification of test water media from emulsified petroleum products in dynamic conditions with the use of the designed sorbent. The number of passed sorption volumes to the «breakthrough» and the full saturation of the sorbent with oil products were determined. The calculated dynamic exchange capacity of the sorbent for petroleum products is 2.9 mg/g, the total exchange capacity – 8.4 mg/g. The limiting stage of petroleum products sorption process kinetics with the carbon-containing sorption material in the studied conditions is diffusion inside the sorbent grains.
Technical and economic optimization of fuel facilities – energy complex using elements of fuzzy logic and artificial neural networks
Authors: Rutskov A L , Fedorov Ya P , Volkov L V 
Published: March 2021

Abstract
This article discusses the possibilities of optimizing the fuel and energy complex by improving the accuracy of the forecast of the state in both the operational and medium-term periods: from an hour to several years. The model used to implement the mentioned energy efficiency improvement is based on the use of fuzzy neural networks together with the function of minimizing power losses in the elements of electric power systems. The Mamdani modification is used, which takes into account the database of previous periods of the system state, represented as static load characteristics. The organization of this approach allows you to take into account weakly formalized factors, thereby improving the quality of forecasting and dispatching management. At the same time, it is possible to use models for a wide class of objects, which is achieved due to its scalability. The estimation of forecasting accuracy of the proposed approach exceeds similar indicators of currently used statistical methods and regression implementations. These factors are direct economic drivers of reducing production costs.
Forecasting of the group of power system’s technical condition composite index and demand for heat energy by office buildings using an artificial neural network
Authors: Guzhov S V , Andreeva T Y , Sofronitsky A P 
Published: March 2021

Abstract
Support of a sustained reduction of energy resource consumption by implementing advanced energy-efficient technologies, including alternative and renewable energy sources, requires a well-reasoned selection of the cost-effective measures so it can be replicated at the «green construction» sites. One of the basic approaches in forming of the present-day policy in the ecofriendly and energy-saving trends became a scaling effect of what has been achieved from the «green construction» technologies implementation at similar sites in Moscow. The actuality and scientific novelty of this paper lie in the development of the evaluation algorithm of energy and as a result of echo-economic efficiency of different measures for energy-saving, the adaptation of the forecasting methodology for building’s technical condition index application, review of the alternative and renewable energy source technologies implementation at the «green construction» sites in the Moscow region, analysis of the technical and ecological efficiency actual values of the utilized energy-saving methods and technologies. Monitoring and dispatching of a large number of separate power plants require special ways of collecting, processing, and analyzing information about the condition of water, heat, fuel, and electricity supply systems to ensure reliability and stability of the equipment functioning. Failures necessitate maintenance works at facilities by way of equipment repair as well as replacement. The consumers may impose penalties on the heat supply company for violating heat energy supply obligations as well as on the building’s owner for incorrect equipment maintenance. The objective of this paper is to determine an approach that helps to develop a software program, based on the neural network programming, to calculate the forecasting composite index of building’s energy system, «green construction» facilities ecological and economic efficiency examination and feasibility evaluation of their further replication in Moscow region.
Mathematical description of wave propagation in order to assess the efficiency of the wave energy converter and find its optimal characteristics
Authors: Bekirov E A , Asanov M M , Murtazaev E R 
Published: March 2021

Abstract
The potential for using wave energy is very high. According to various estimates, the energy of the world’s ocean waves can range from 146 TWh/year to 29,500 TWh/year. A number of mathematical models have been developed for the wave parameters analysis. The mathematical description of wave behaviour is a very complex process. Not least this is due to the complexity of the interaction of the wind that forms the waves with the water surface. As for the Black Sea, the mean annual wave power flux in this region can reach 4.8 kW/m. Such conclusions were made on the basis of modelling; the input was data on bathymetry of the region, wind speed and its direction. The obtained results on significant wave height, wave length and period were compared with the data obtained from the satellite. Many devices that convert wave energy into electrical energy have been developed. The choice of a particular device is based on a number of factors, including the installation site characteristics, weather conditions and economic opportunities. The article proposes a simple mathematical model of a wave, representing it in the form of a sinusoid. It is possible to estimate the wave energy conversion theoretical potential in a given region by analysing the obtained values of the energy received by the converter working surface (for example, turbine blade) after interacting with the wave. Calculations were carried out using the parameters of the Black Sea waves near the Crimean peninsula in winter.
Battery energy storage systems (bess) state of the art
Authors: Jose Deepa , Meza Jhonatan , Prashanth J S 
Published: March 2021

Summary
This article presents a review of the battery energy storage method or BESS for its acronym in English (Battery Energy Storage System), considering that the era of high capacity storage batteries is approaching and why historically the storage of energy did not appear in the planning or operation of electrical systems. However, this solution is currently setting a global trend for having high levels of efficiency and why it is also being driven by the need to modernize the network in order to increase the use of renewable energies.
Thermal aspect of material selection for substrate board equipped with high heat flux IC chips
Authors: Durgam Shankar , Bhosale Ajinkya , Bhosale Vivek , Deshpande Revati , Sutar Pankaj 
Published: March 2021

Abstract
This paper investigates the material selection for substrate board equipped with nine silicon heaters that mimic IC chips. This includes computational research on laminar forced convection air cooling of silicon IC chips in electronic components mounted on substrate boards subjected to high uniform heat fluxes in a horizontal channel. Copper clad boards with single and multilayer having thermal conductivities of 8.8, 40.5, and 61.5 W/m K are the substrate materials used in this study. Three-dimensional steady-state conjugate heat transfer with laminar non-isothermal fluid flow module is used from COMSOL Multiphysics 5.4 to study fluid flow and heat transfer. Simulations performed with flowing air velocities of 1.5, 2.5, and 3.5 m/s with very high heat fluxes of 10000, 12500, and 15000 W/m2. It showed that the temperature on subsrate board strongly depends upon placement of heaters, Reynolds number, substrate thermal conductivity. It also found that higher thermal conductivity substrate materials results in heat transfer enhancement and decrease chances of failures of electronic devices. A non-dimensional temperature based correlation is also devised in therms of non-dimensional heat flux, thermal conductivity, Nusselt number, and Reynolds number.
Construction of a Physical Device for Abduction Movement Enhancement
Authors: Devayani Moghe Dr. , Kashinath Sahoo Dr. , Varadharajulu Dr. G. , Suraj Kanase Dr. 
Published: March 2021

Abstract
The present research has made an attempt to theorize a physical device using the scientific method which will provide support to shoulder joint of a user. This physical orthotic device includes a rigid support, at least one pair of electrodes, at least one strap and the at least one-second strap. The rigid support is having an outer surface and an inner surface and is resting against the shoulder joint. The at least one strap is arranged on the rigid support to wrap around an upper arm of the shoulder joint for securing the orthotic device on the shoulder joint of the user. The at least one-second strap is extending from the rigid support and adapted to wrap around an armpit of a second shoulder joint for efficiently treating a subluxation condition.
Predictions of fugacity coefficients of pure substances from equations of state
Authors: Kaur S , Akhouri B P 
Published: March 2021

Abstract
This aim of this paper is to predict fugacity coefficients from newly developed equations of state. The fugacity coefficients have been calculated for Methane and Caron di-oxide from equations of state of Soave Redlic Kwong (SRK), Peng Robinson (PR) and Twu Sim Tassone (TST) taking reduced temperatures, Tr
of interest from each of the three ranges 0<Tr
<1, 1<Tr<3 and 1<T <5.5 together with the reduced pressures, Pr
in steps of 0.2 in the range 0<P <10. The calculated results of fugacity coefficients were compared with the available fugacity coefficient data for Beattie-Bridgeman (BB) equation. The calculations suggest that the TST equation of state is most suitable in predicting the fugacity coefficient of pure substances.
A study on 6063aa elliptical and semi-circular cross-section tpct with fe3o4 nano fluid
Authors: Arokiya Pushparaj D. , Karunakaran Dr. N. , Alagappan Dr. N. 
Published: March 2021

Abstract
Thermosyphon is the most preferred device to transfer heat for it costs low, requires comparatively low maintenance, besides being adaptable to any size. The ship transfer characteristics in this cooling system get enhanced by the use of the working fluid this paper deals with the elliptical and semicircular Two-Phase Closed Thermosyphon (TPCT) range of efficiency when it is added with Fe3O4 nanofluid. A number of tests are conducted with elliptical and semicircular TPCT with Fe3O4 with the inevitable input parameters such as heat input, inclination and pure water flow rate to obtain the output result of efficiency. The results of the experiments with thermosyphons proved the fact that the thermal performance has improved with the incorporation of elliptical TPCT combined with Fe3O4 Nano.
Effectiveness on mechanical properties of m60 grade scc with partial replacement of cement by different mineral admixture like ggbs, lime powder and metakaolin at various percentages
Authors: kumar Polampally Vinod , Satyanarayana Dr. G.V.V 
Published: March 2021

Abstract
Production of cement brings about the discharge of green house gases which at last prompts an unnatural weather change on one hand. On other hand consumption of crude materials like lime stone. So by utilizing elective materials we can lessen the creation of cement. Presently a day’s the majority of the analysts are centered around replacement of cement with other mineral admixtures like Ground granulated blast furnanace slag(GGBS),Metakaolin and lime powder and so forth without bargaining its mechanical properties and durability. Self compacting concrete doesn’t need vibration for setting and compaction. This paper presents the outcomes on various mechanical properties of self compacting concrete utilizing the standard Portland cement, GGBS, lime powder and metakaolin as binding material in making concrete. The hardened concrte properties like compressive strength, split tensile strength and flexural strength are found in trial work and comparison made with normal concrete.
Evaluation of optimum dosage in blended self curing concrete on the impact of supplementary cementitious materials (scm’s) and durability studies on different proportions
Authors: Vivek Kumar C , Parvez Mohammed Aiman , Srinivas Dr. T. 
Published: March 2021

Abstract
Now a days, the shortage of potable water increases, for domestic and commercial purposes due to environmental conditions. Due to this scarcity, curing of concrete is affected and in this point of view water assets are more valuable every day and becomes more economical. Traditional Curing used for retaining moisture within the concrete elements during the early days and beyond to develop the desired properties in terms of strength & durability. To develop the modern era curing, a few of self-curing agents like Super Absorbent Polymers, Polyethylene Glycol (PEG 400) has been used for internal curing of concrete used for reducing the hydration process. In this experimental study, Supplementary Cementitious Materials like Class F Flyash, Silica Fume and Ground Granulated Blast Furnace Slag (GGBFS), have been casted for 65%+25%+15% (M2), 65%+20%+15% (M6), 65%+25%+10% (M10) and 65%+20%+15% (M11) of optimal mix proportions. The sorptivity assessments have being carried out on all blended mixes of Self Cured Concrete with size of 15 cm x 15cm x15cm. The pH value of the acidic medium was at 0.45 by submerging in acid, the specimen samples are brought out and were cleaned in repeatedly with water and kept in atmospheric condition for two days for constant weight and then the specimens are balanced using weighing scale and loss in weight and hence the percentage in loss of weight was premeditated within and after 28 days with different mix proportion of M30 grade of concrete supplementary cementitious materials like Flyash, Ground Granulated Blast Furnace Slag and Silica Fume with PEG 400 as 1% by its weight.
Schedule delay analysis of a multi-storied residential project using primavera
Authors: Ch Balakrishna , Anand Goud K , Prakash Akula , Mounika Kandlagunta 
Published: March 2021

Abstract
: Procrastination in schedule is a major problem for any construction project. Completing the project on time is a very hard task as the delay in construction occurs due to various factors. Loss of time and money are the outcomes of the delay in the project. The delay may occur through various factors, which are mostly unpredictable. These delays cause losses to the contractor; sometimes this may also lead to discontinuation of the contract and affect the possession date of the project. It is necessary to determine the factors that are responsible for the delay. In this study, schedule delay analysis is conducted on the construction of a multi-storied residential project and the factors and parties responsible for the delays are found out. Many unforeseen factors and ignored issues that lead to the delay are identified. Using various features and tools of Primavera software, the schedule delay analysis is conducted, and an alternate schedule is created with increased resources and time so that it reduces the effect of delays, which would be worthwhile to the contractor and all other parties involved in the project.
Near-Field Fractal RFID Reader Antenna for Item Level Tagging
Authors: Varadhan Chitra , Arulselvi Dr 
Published: March 2021

Abstract
This paper proposes a novel methodology for designing near-field fractal antenna operating at European Ultra-High Frequency (UHF) for Radio Frequency Identification (RFID) systems. The principle of Oppositely Directed Current (ODC) technique is implemented to generate homogeneous magnetic field above the surface area meant for near-field RFID application. The conceptual theoretical framework of the design based on the fractal structure can be applied. The fabricated RFID reader antenna operates at 867 MHz with reflection coefficient S11 -30 dB, thus the reader antenna covering UHF RFID band range. The reading capabilities of the antenna are determined by the interrogation area of, 190mm x 243mm. It is adequate for object tracking and detection systems in pharmaceutical management and chemical industries.
Experimental validation of laser powder bed fusion simulation
Authors: Minetola P , Stiuso V , Calignano F , Galati M , Khandpur M S , Fontana L 
Published: March 2021

Abstract
In many industrial sectors, laser powder bed fusion (L-PBF) is the main additive manufacturing technology for producing end-usable metal parts. Although L-PBF technique has been developed in the last twenty years, ensuring process feasibility and achieving maximum product quality at the first building session is still a difficult goal to pursue. Simulation software packages are available in the market for the prediction of induced stresses and deformation in L-PBF products to help the user getting the part right at the first time. In this paper, Amphyon software by Additive Works is tested and experimentally validated for the production of Ti6Al4V parts in an EOSINT M270 Dual Mode machine. First, the sensitivity of the software is evaluated by changing the main process parameters by +/- 20% with respect to Ti64 reference values. After calibration, the software is validated by comparison of the predicted deformed shape of a reference part with the real geometry using 3D scanning. Experimental results show that Amphyon software is able to predict the deformed shape for L-PBF parts correctly. The deviations from the real geometry depend on a simplified simulation model that considers a limited set of parameters for the L-PBF process.
Effect of process parameters on material removal rate in magnetic abrasive flow machining of Al/SiC/B4C metal matrix composites
Authors: Jindal Anil , Kumar Parlad , Mittal Sushil 
Published: March 2021

Abstract
In the recent times, the necessity for magnetic abrasive flow machining (MAFM) process in the industry arises as it is superior to conventional machining processes. MAFM is used to obtain high surface finishing and materials removal rate for the cylindrical, complex and intricate profiles. In this paper, the effect of process parameters has been studied on the material removal rate in MAFM process of metal matrix composites of Al/SiC/B4C prepared by stir casting process. The process parameters are magnetic field, extrusion pressure, no. of cycles, mesh size of abrasives, workpiece material and concentration of abrasives.Taguchi design of experiments has been used for design of experiments and the analysis of variance technique has been used to check the significance level of each input parameter. The results show that the intensity of magnetic field has a dominant effect on the material removal rate.