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Journal articles on the topic 'Thermal economic calculations'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Karapetyan, Lusine Gurgen, and Tigran Vardan Ter-Poghosyan. "Study on the New Method of Constructing Shear Walls in Multi-Storey Buildings With Site Cast Reinforced Concrete Frame System." Journal of Architectural and Engineering Research 1, no. 2 (2021): 41–47. http://dx.doi.org/10.54338/27382656-2021.1-11.

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The article touches upon the comparative analysis of bearing system calculations of a multi-storey residential building with site cast reinforced concrete frame and shear wall constructed by two different methods. In the calculation models, the shear walls are constructed from site cast reinforced concrete in the first case, and from three-layer sound and thermal insulating bearing panels in the second. The calculations have been made considering the impact of the seismic force. According to the calculation results, the dynamic parameters of the bearing systems of the buildings and the economi

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Prokhorov, Dmitry V., and Semen S. Vasilev. "Efficiency Evaluation of Evacuated Solar Tube Collectors in Sakha Republic (Yakutia)." E3S Web of Conferences 584 (2024): 01050. http://dx.doi.org/10.1051/e3sconf/202458401050.

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Calculations of solar radiation incident on an inclined surface were performed considering the installation location, local time, azimuth angle, tilt angle, atmospheric transparency coefficient and surface albedo. The calculations were based on long-term meteorological observation archives. The accuracy of the solar radiation calculations for the inclined surface was verified. A comparative analysis was conducted between the calculation results carried out for the installation location, tilt angle, and azimuth angle of the experimental setup and pyranometer measurements. Thermal energy product

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Marhatang, Marhatang, and Muhammad Ruswandi Djalal. "Optimal economic dispatch using particle swarm optimization in Sulselrabar system." IAES International Journal of Artificial Intelligence (IJ-AI) 11, no. 1 (2022): 221. http://dx.doi.org/10.11591/ijai.v11.i1.pp221-228.

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In this study, a particle swarm optimization (PSO) is proposed to optimize the cost of generating thermal plants in the South Sulawesi system. The study was con ducted by analyzing several methods using the lagrange and ant colony optimization (ACO). PSO algorithm converges on the 11th iteration algorithm with the lowest generation cost obtained, which is Rp129687962.17/hour. While the ACO algorithm converges on the 34th iteration with a generation cost of Rp131,473,269.39/hour. The results of optimization using PSO produce a total thermal power of 400.75 MW and losses of 26.15 MW. The PSO met

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Marhatang and Ruswandi Djalal Muhammad. "Optimal economic dispatch using particle swarm optimization in Sulselrabar system." International Journal of Artificial Intelligence (IJ-AI) 11, no. 1 (2022): 221–28. https://doi.org/10.11591/ijai.v11.i1.pp221-228.

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In this study, a particle swarm optimization (PSO) is proposed to optimize the cost of generating thermal plants in the South Sulawesi system. The study was con ducted by analyzing several methods using the lagrange and ant colony optimization (ACO). PSO algorithm converges on the 11th iteration algorithm with the lowest generation cost obtained, which is Rp129687962.17/hour. While the ACO algorithm converges on the 34th iteration with a generation cost of Rp131,473,269.39/hour. The results of optimization using PSO produce a total thermal power of 400.75 MW and losses of 26.15 MW. The PSO met

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Orzechowski, Tadeusz, and Mateusz Orzechowski. "Optimal thickness of various insulation materials for different temperature conditions and heat sources in terms of economic aspect." Journal of Building Physics 41, no. 4 (2017): 377–93. http://dx.doi.org/10.1177/1744259117708733.

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The article presents the methodology for calculating the optimal insulation thickness that is related to the quality of energy supply and fuel prices. Assuming that the total cost following renovation is the sum of the costs of heating and thermal upgrading, it was shown that when calculating the optimal insulation thickness, the thermal resistance of the outer walls should be taken into account. Such calculations, in addition to the characteristics of the heat source, should be carried out taking into account local weather conditions. The study presents the results of such calculations for th

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Rotach, R. R., and Yu V. Vankov. "Increasing the efficiency of the boiler house using screw expansion machines." Power engineering: research, equipment, technology 24, no. 2 (2022): 14–23. http://dx.doi.org/10.30724/1998-9903-2022-24-2-14-23.

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THE PURPOSE. Improving the efficiency of the boiler house. Development of a scheme for the introduction of screw expansion machines (SEM) into the thermal scheme of a boiler house. Calculation of the main technical characteristics of SEM and network heaters. Calculation of the economic effect and assessment of the feasibility of using energy-saving technologies in an industrial enterprise.METHODS. The work uses methods of computational mathematics, the theory of heat and mass transfer, methods of technical and economic calculations in the energy sector, and thermodynamic analysis of power plan

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Vatin, Nikolai, Aleksandr Sergeevich Gorshkov, Darya Viktorovna Nemova, Anastasiia Andreevna Staritcyna, and Darya Sergeevna Tarasova. "The Energy-Efficient Heat Insulation Thickness for Systems of Hinged Ventilated Facades." Advanced Materials Research 941-944 (June 2014): 905–20. http://dx.doi.org/10.4028/www.scientific.net/amr.941-944.905.

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Calculation of payback periods of the energy saving actions directed on increase of level of thermal protection of external enclosure structures of buildings is given. Economic efficiency of investments in energy saving actions is analyzed and the model allowing to carry out the specified analysis is offered. Recommendations about reduction of payback periods are provided.Article also is devoted definition of optimum, economically well-founded thickness of a insulant in systems of rear ventilated facades. Are resulted thermotechnical and economic calculations. The optimum thickness of the insu

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Pendjiev, Akhmet, and Serdar Nazarov. "Theoretical and Methodological Calculations of Solar Energy Resource Potentials in the Northern Garagum." E3S Web of Conferences 288 (2021): 01092. http://dx.doi.org/10.1051/e3sconf/202128801092.

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The urgency of the issue is the development of the Garagum desert, which occupies 80% of the land resources of Turkmenistan. The aim of the research is to supply the desert regions of the Garagum with energy using solar energy technologies and installations. The research task - to determine the solar-energy resource potential using innovative methods of calculation in the design, creation and implementation of efficient solar energy technology and equipment. Methodology. To determine the gross, technical, economic and ecological potential, the natural and climatic conditions of the Northern Ga

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Kulkarni, Dharati, Kishore Kumar Gaded, B. S. Ajay Nagendra, Karthik S. Koushik, and Kavya Prabhu. "Economic Load Dispatch of Three Bus Thermal Generator Using Fuzzy Logic Technique." Asian Journal of Electrical Sciences 8, S1 (2019): 42–44. http://dx.doi.org/10.51983/ajes-2019.8.s1.2782.

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This paper gives details/information about economic load dispatch using manual method and optimized fuzzy method. Using manual method, we get lambda ‘λ’ one of the inputs to the fuzzy by using different demand values. The calculations of manual method and fuzzy results are both mentioned in this paper. The whole analysis is done considering transmission losses.

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Koroli, Mekhriya, and Adelya Ivanisova. "Calculation of the economic and environmental efficiency of introducing advanced technologies in the energy supply of buildings." E3S Web of Conferences 471 (2024): 02011. http://dx.doi.org/10.1051/e3sconf/202447102011.

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This article discusses the use of advanced cogeneration technologies at existing combined heat and power plants, regulating the supply of thermal energy in a building using an individual heating point. For Uzbekistan, an urgent problem is the serious study of the use of energysaving technologies, in particular in the heat supply systems, for the efficient use of investments. The achieved effect of reducing specific energy consumption for the production and consumption of thermal energy to the level of world standards will ensure the energy and environmental security of the country, which urgen

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Németh, Márton. "Renewable Energy Production and Storage Options and their Economic Impacts in Hungary." Pénzügyi Szemle = Public Finance Quarterly 67, no. 3 (2022): 335–57. http://dx.doi.org/10.35551/pfq_2022_3_2.

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The study reviews the most relevant renewable energy sources, focusing on their possible application, economic aspects and potential for Hungary. Feasibility and economic analysis is made for plant-sized photovoltaic devices, wind turbines, geothermal power plants and biomass power plants. It was found that solar cell technology has the highest revenue. However, its further spread is limited by several factors, such as the reactive effect on the energy market, grid problems, and weather dependency. A possible solution for these problems is to use energy storage systems. For the sake of simplic

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Baganov, Nikolay A., Vitaliy A. Alekseyenko, and Dmitriy A. Sidel’nikov. "ASSESSMENT OF THE THERMAL BALANCE IN THE THERMAL NEUTRALIZER TO REDUCE THE TOXICITY OF EXHAUST GASES." Tekhnicheskiy servis mashin 2, no. 143 (2021): 103–9. http://dx.doi.org/10.22314/2618-8287-2021-59-2-103-109.

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According to statistics, the share of automotive equipment accounts for up to 60 percent of harmful emissions. Gasoline engines play an important role in the pollution of the air basin. In the areas of operation of vehicles, there is an increase in the concentration of toxic substances. (Research purpose) The research purpose is in creating an effective means of cleaning exhaust gases, which has an increased resource and little impact on the power and fuel-economic indicators of the engine, and studying the processes occurring in thermal neutralizers, for their subsequent use on mobile agricul

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Kler, Aleksandr M., Pavel V. Zharkov, Elena L. Stepanova, and Yulia M. Potanina. "Accounting for variable operation conditions when optimizing cogeneration GTU and CCGT." E3S Web of Conferences 209 (2020): 03014. http://dx.doi.org/10.1051/e3sconf/202020903014.

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The paper deals with a new approach to mathematical modeling and optimization of cogeneration GTU and CCGT, taking into account the variable conditions of their work, developed at the ISEM SB RAS. An analysis was carried out of the features of using this approach in relation to the thermal power plants. According to this approach at mathematical modelling of the plant there are structural optimized parameters (affecting the design of the plant), mode optimized parameters (affecting the operation of the plant in the mode with partial thermal loads) and balancing parameters affecting solution of

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Stolarska, Agata, Jarosław Strzałkowski, and Michał Szczeciński. "The feasibility and economic efficiency of selective modernization solutions in a singlefamily house located in Siemianice near Słupsk." E3S Web of Conferences 49 (2018): 00108. http://dx.doi.org/10.1051/e3sconf/20184900108.

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This study presents the results of the analysis on the energy balance of a single-family residential home built in 1986. The authors assess the proposed construction improvements in terms of their ability to enhance the building's energy efficiency and comfort. The studies were carried out for the needs of the owners who saw the necessity of reducing the maintenance and heating costs of the house and of improving their living conditions. The on-site studies and analyses of the building concerning the calculations for the proposed variants of solutions have pointed to the necessity and relevanc

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Mazzantini, Oscar, Miguel Schivo, Julián Di Césare, Ricardo Garbero, Matías Rivero, and Germán Theler. "A Coupled Calculation Suite for Atucha II Operational Transients Analysis." Science and Technology of Nuclear Installations 2011 (2011): 1–12. http://dx.doi.org/10.1155/2011/785304.

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While more than a decade ago reactor and thermal hydraulic calculations were tedious and often needed a lot of approximations and simplifications that forced the designers to take a very conservative approach, computational resources available nowadays allow engineers to cope with increasingly complex problems in a reasonable time. The use of best-estimate calculations provides tools to justify convenient engineering margins, reduces costs, and maximises economic benefits. In this direction, a suite of coupled best-estimate specific calculation codes was developed to analyse the behaviour of t

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Varganova, Aleksandra V., Vadim R. Khramshin, and Andrey A. Radionov. "Operating Modes Optimization for the Boiler Units of Industrial Steam Plants." Energies 16, no. 6 (2023): 2596. http://dx.doi.org/10.3390/en16062596.

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The free market forces energy-intensive industrial enterprises to continuously compete. A possible competitive advantage for such enterprises is reducing the finished products cost. This may be achieved by reducing the share of energy in this cost, including by rationalizing the use of energy resources. This study develops a system for the automated analysis and calculation of feasible boiler unit loads, defined according to the criterion of the minimum cost of live steam in a separate steam plant pipeline. The calculations consider the balance limit on the steam, the boiler unit’s wear and te

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17

Zrodnikov, Anatoly V., Viktor M. Dekusar, and Olga S. Gurskaya. "System levelized fuel cost of electricity generation in a two-component nuclear energy system with a closed uranium-plutonium NFC." Nuclear Energy and Technology 7, no. 4 (2021): 303–9. http://dx.doi.org/10.3897/nucet.7.78367.

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The authors propose an approach to the calculation of the levelized unit fuel cost (LUFC) of electricity generation for a fast reactor in a two-component nuclear energy system (NES) with regard for plutonium production. The approach is based on taking into account the additional economic effect, which can be achieved through the sale at the market price of the natural uranium released due to the substitution of thermal reactors by fast reactors with MOX fuel based on the plutonium bred in a fast reactor. This requires considering simultaneously the reactor parts of the fuel cycle for fast and

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Zrodnikov, Anatoly V., Viktor M. Dekusar, and Olga S. Gurskaya. "System levelized fuel cost of electricity generation in a two-component nuclear energy system with a closed uranium-plutonium NFC." Nuclear Energy and Technology 7, no. (4) (2021): 303–9. https://doi.org/10.3897/nucet.7.78367.

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The authors propose an approach to the calculation of the levelized unit fuel cost (LUFC) of electricity generation for a fast reactor in a two-component nuclear energy system (NES) with regard for plutonium production. The approach is based on taking into account the additional economic effect, which can be achieved through the sale at the market price of the natural uranium released due to the substitution of thermal reactors by fast reactors with MOX fuel based on the plutonium bred in a fast reactor. This requires considering simultaneously the reactor parts of the fuel cycle for fast and

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Zvereva, E. R., G. E. Marin, and A. V. Ishalin. "Utilization of low-potential thermal power plant energy sources." Power engineering: research, equipment, technology 26, no. 6 (2025): 147–56. https://doi.org/10.30724/1998-9903-2024-26-6-147-156.

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THE PURPOSE. Development of technical solutions for the utilization of secondary boiling steam to reduce losses of thermal energy, steam and condensate of CHP plants. METHODS. Comparative studies of disposal options were conducted, and several schemes for condensation of low-potential energy sources were proposed. The economic effect of the proposed technical solutions for the utilization of steam emissions from CHP plants is calculated. RESULTS. To determine the technical characteristics of the auxiliary equipment, calculations were carried out on the amount of coolant. During the winter peri

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Dzhurka, Natalia, and Olga Dyomina. "Evaluating the Economic Effects of Emissions Reduction in the Power System of Region: The Russian Far East Experience." Regionalistica 7, no. 2 (2020): 5–23. http://dx.doi.org/10.14530/reg.2020.2.5.

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The article presents model complex for assessing the economic consequences of reducing greenhouse gas emissions in the power system of region. The trajectories of emissions and macroeconomic indicators for the Russian Far East are estimated in the context of maintaining the current parameters of the power system efficiency and in the context of power system transformation (modernization of thermal power plants, transition of thermal power plants from coal to gas with the development of gas processing industry). The results of calculations confirm that an emissions reduction is a secondary effe

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Kaczmarczyk, Michał, Magda Kaczmarczyk, Konrad Thürmer, and Magdalena Klich. "Interpretation of rock mass thermal conductivity at the design stage of heat pump installation and its impact on system efficiency (COP)." E3S Web of Conferences 66 (2018): 02007. http://dx.doi.org/10.1051/e3sconf/20186602007.

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The recognition of geological and thermal conditions of the rock mass in the case of designing a vertical borehole heat exchanger as the ground source for heat pump installations is a key issue affecting the efficiency of the heating/cooling system operation. This is especially important for large-sized buildings with a high demand for thermal power, which affects into the size of the ground source installation. The aim of the article is to indicate the difference in the obtained results concerning thermal calculations at the design stage of the brine/water heat pump installation with the vert

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Chaushevski, Anton, and Sofija Nikolova-Poceva. "Long Term Planning of Macedonian Electricity Supply." Energija, ekonomija, ekologija XXIV, no. 4 (2022): 85–92. http://dx.doi.org/10.46793/eee22-4.85c.

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In the paper alternatives for expansion of the Macedonian electricity supply system are presented. MESSAGE tool is used for modelling the system, for developing the scenarios, to analyse cost optimal energy pathways and to determine the optimal electricity generation technology mix. The calculations for the period 2020-2050 are made in a 5-year interval. Two scenarios are developed: Scenario 1 – BAU (Business as Usual) scenario, where the current energy structure prevailed, with trends like the current development. The electricity demand is satisfied by coal-fired thermal power plants, gas-fir

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Golobokov, S. V., K. A. Stepanova, T. Yu Brostilova, and G. E. Kornilov. "Electrical distributed generation for industrial power supply." IOP Conference Series: Earth and Environmental Science 866, no. 1 (2021): 012033. http://dx.doi.org/10.1088/1755-1315/866/1/012033.

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Abstract Distributed energy generation (DEG) is currently a promising direction in the energy sector. The article outlines the possibilities of using distributed generation for power supply to an industrial enterprise, and highlights the significant advantages of DEG for industry. As a result of the performed studies, calculations of economic indicators and comparison of delivery options for gas piston units of various capacities were carried out. The practicability of using mini-thermal power plants (mini-TPP) in the power supply system of the enterprise has been proved. The balance of active

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Filimonov, Andrey A., and Lyudmila A. Strokova. "Assignment of initial parameters and boundary conditions for modeling thermal state of underground pipelines in a zone of progression of island permafrost soils." Bulletin of the Tomsk Polytechnic University Geo Assets Engineering 334, no. 12 (2023): 109–24. http://dx.doi.org/10.18799/24131830/2023/12/4345.

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Relevance. Determined by the importance of predictive modeling of thermal state of pipeline transport facilities located in the permafrost zone. Prediction of geocryological effects is possible through computer simulation of heat and mechanical interactions between a pipeline and a soil medium. Such simulators use data on climatic and geocryological conditions and processes, as well as the information about design and process-dependent parameters of the pipeline, data on its spatial positioning. The presence of various factors influencing heat and mass transfer, as well as the complexity of th

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Kalús, Daniel, Veronika Mučková, and Daniel Koudelková. "Energy, Economic and Environmental Assessment of Thermal Barrier Application in Building Envelope Structures." Coatings 11, no. 12 (2021): 1538. http://dx.doi.org/10.3390/coatings11121538.

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Thermal engineering requirements for building structures are becoming more and more strict. Thermal barriers (TBs) are energy-active elements integrated into the building structure in which a heat transfer medium (water or air) flows. A survey of the scientific literature on the subject points to the fact that this is a very topical and promising area of research and, so far, most studies on TBs are based on calculations, computer simulations and experimental measurements. Few studies have focused on the economic and environmental aspects of TB use. Following the research results presented by

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Angelini, Alessia, and Stefano Silvestri. "Asbestos Removal Acceleration for New Jobs and Fossil Fuel Use Reduction for Public Health and Climate Readiness: A Contribution to the Revival of the Italian Economy Post-COVID-19." NEW SOLUTIONS: A Journal of Environmental and Occupational Health Policy 31, no. 4 (2021): 434–40. http://dx.doi.org/10.1177/10482911211052694.

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The Italian economy has been battered by the SARS-CoV-2/COVID-19 pandemic. European Union and Italian government economic recovery funds will provide special economic recovery loans aimed toward energy saving and the consequent reduction of greenhouse gas emissions (GHG) to meet the Paris Agreement climate goals. In, Italy, millions of square meters of asbestos cement (AC) roofing cover industrial and civic buildings. Removal of this asbestos containing material (ACM) would contribute to three pandemic and economic recovery objectives: job creation, reduction of greenhouse gasses (thru energy

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Wang, Yijing, Yonggao Yin, Zhanxiao Kang, and Jintu Fan. "Thermodynamic Analysis of Pumped Thermal Energy Storage System Combined Cold, Heat, and Power Generation." Energies 18, no. 3 (2025): 525. https://doi.org/10.3390/en18030525.

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Aiming at problems such as the low efficiency of renewable energy conversion and the single energy flow mode, this paper proposes a heat pump energy storage system combining cold, heat and power generation to achieve the purpose of diversified utilization of renewable energy. The system is suitable for buildings requiring cooling, heating/domestic hot water production and electricity. This paper mainly uses MATLAB for numerical calculations, selects several key cycle parameters to calculate and analyze the thermodynamic performance of the system, and uses the genetic algorithm and TOPSIS decis

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Bergen, Darya. "Alternative Options for Modernization of Regional Heat Supply Systems: Environmental and Economic Aspects." Bulletin of Baikal State University 31, no. 3 (2021): 407–15. http://dx.doi.org/10.17150/2500-2759.2021.31(3).407-415.

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At present, environmental pollution by fuel combustion products is one of the key problems in the heat supply sector. It affects the entire population of the Earth. The purpose of the research is to substantiate the necessity of ecological upgrading of thermal power facilities in the Irkutsk region and using a part of municipal solid waste as an alternative fuel at thermal power facilities of the Russian Federation. The research shows that the use of the two kinds of fuel (solid biofuel and alternative fuel) can reduce the anthropogenic load. This measure can be a way of energy efficient dispo

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Nešović, Aleksandar, Robert Kowalik, Dragan Cvetković, and Agata Janaszek. "Multi-Criteria Decision-Making Method for Simple and Fast Dimensioning and Selection of Glass Tube Collector Type Based on the Iterative Thermal Resistance Calculation Algorithm with Experimental Validation." Applied Sciences 14, no. 15 (2024): 6603. http://dx.doi.org/10.3390/app14156603.

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This paper presents an analytical method for the dimensioning and selection of the four glass tube collector types: single-glazed with an air layer, single-glazed with a vacuum layer, double-glazed with an air layer, and double-glazed with a vacuum layer. In the first part of the paper (dimensioning phase), the iterative thermal resistance calculation algorithms were developed for all glass tube collector types, whereby the iterative thermal resistance calculation algorithm of the single-glazed tube collector with an air layer was experimentally tested and validated. The second part of the pap

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Skovajsa, Jan, and Martin Zálešák. "Economic assessment and optimizing of the solar water heating system." MATEC Web of Conferences 210 (2018): 02023. http://dx.doi.org/10.1051/matecconf/201821002023.

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The article deals with the economic evaluation of investment and optimization of the solar water heating system for family houses. From the point of view of solar systems, the optimal solution is based on the specific application of it. The design is dependent on the location of solar thermal collectors and ration between active aperture area and real daytime consumption. Common calculations according to actual standards often give overstated results, which also reflected in the value of the investments. The article presents the research of optimal parameters of the thermal solar system for pr

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Cherdasa, Jeres Rorym, Tutuka Ariadji, Benjamin Sapiie, and Ucok W. R. Siagian. "The Importance of Reservoir Geomechanic Modelling for Carbon Sequestration, Storage, and Utilization: A Case Study from East Natuna." Indonesian Journal on Geoscience 11, no. 2 (2024): 269–93. http://dx.doi.org/10.17014/ijog.11.2.269-293.

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East Natuna is well known for its huge natural gas reserves with a very high CO2 content. The appearance of CO2 content in an oil and gas field is always considered as waste material, and will severely affect the economic value of the field. The higher the content, the more costly the process, both technically and environmentally. In this research, the newly proposed reservoir management approach called CSSU (Carbon Sequestration, Storage, and Utilization) method is trying to be applied to change the paradigm of CO2 from waste material into economic material. The CSSU method is an integration

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Tytov, Oleksandr, Valentyna Cholyshkina, Vladyslav Kurilov, and Hennadii Lebed. "Technique to determine the parameters of a plate thickener for silicate extraction from fly ash of coal thermal power plants." IOP Conference Series: Earth and Environmental Science 1491, no. 1 (2025): 012062. https://doi.org/10.1088/1755-1315/1491/1/012062.

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Abstract This study aims to develop a methodology for calculating the parameters of a plate thickener designed to separate the non-carbonaceous (mainly silicate) fraction of fly ash from coal thermal power plants in an upward flow while simultaneously enabling counter flow of sands. The methodology is based on analytical and experimental data on the sedimentation velocity of ash particles in pulp. Unlike existing calculations, the proposed approach accounts for a significant flow of heavier aluminosilicate fractions that occupy a considerable portion of the space between plates during separati

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Stepanova, E. L., and A. P. Ovchinnikov. "Determination of average relative capital investment of 30–125 MW combined-cycle plants commissioned at Russian thermal power plants in 2015–2020. Comparative analysis with data obtained in 2010–2014." iPolytech Journal 25, no. 6 (2022): 762–72. http://dx.doi.org/10.21285/1814-3520-2021-6-762-772.

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The present work examines average relative capital investment and fuel consumption for electric and thermal energy supply of the combined-cycle plants having 30–125 MW gas turbines commissioned at Russian thermal power plants in 2015–2020. In this work, we used general calculation methods of average relative capital investments and fuel consumption for the electrical and thermal energy supply using power equipment of thermal power plants. To assess the scope of commissioning gas turbines incorporated into the combined-cycle plants, they were classified into three groups by electrical power: 30

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Kirshina, E. Yu, and I. D. Anikina. "Increasing the production capacity of the chp by introducing fuel cells." Power engineering: research, equipment, technology 25, no. 4 (2023): 41–52. http://dx.doi.org/10.30724/1998-9903-2023-25-4-41-52.

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RELEVANCE. Improving the efficiency of the plant with an increase in operating capacity is one of the priority tasks of the development of power plants. One of the solutions to this issue is the introduction of fuel cells as the main or additional source of power and heat. The development of a high-quality scheme for the introduction of fuel cells into thermal power plants will increase their production capacity with the possibility of further reducing the carbon footprint by reducing the consumption of natural gas.THE PURPOSE. To develop thermal power plant schemes in combination with fuel ce

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Doddala, P. R. C., M. A. Minor, S. A. Trewick, and D. J. Rogers. "Modelling emergence of bronze beetle (Eucolaspis spp) adults using degreedays and threshold temperatures." New Zealand Plant Protection 64 (January 8, 2011): 290. http://dx.doi.org/10.30843/nzpp.2011.64.6000.

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Eucolaspis spp beetles are native and endemic to New Zealand and are important pests of exotic fruit crops Organic apple orchards in Hawkes Bay seem to be particularly vulnerable and there adult beetles emerge during spring/summer feed on leaves and fruitlets and cause significant economic loss Seasonal variations in bronze beetle occurrence especially in adult emergence add further problems to already deficient control measures available to organic growers Phenological models that could predict adult emergence in the field would greatly benefit bronze beetle control programmes Pupal developme

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Agwa, Ahmed M., Yehya I. Mesalam, Mohamed H. Hassan, Mahmoud A. El-Dabah, Anas M. El-Sherif, and Salah Kamel. "Improved Gradient-Based Optimizer for Modelling Thermal and Hydropower Plants." International Transactions on Electrical Energy Systems 2022 (September 22, 2022): 1–22. http://dx.doi.org/10.1155/2022/3990226.

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Adequate and accurate models of thermal power plants (TPP) and hydropower plants (HPP) are of great importance for the optimal economic functioning of electric power systems. The extracted models have a direct impact on economic dispatch calculations. In this research, a modified optimization algorithm called an improved gradient-based optimizer (IGBO) is deployed for the optimal extraction of TPP and HPP input-output parameters. Firstly, the IGBO is tested for use with well-known benchmark functions and shows outstanding performance over the original GBO and other competitive algorithms. For

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Marin, G. E., B. M. Osipov, and A. R. Akhmetshin. "Technical and economic assessment of the parameters of thermal schemes of thermal power plants with a hydrogen generator." Power engineering: research, equipment, technology 23, no. 2 (2021): 84–92. http://dx.doi.org/10.30724/1998-9903-2021-23-2-84-92.

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THE PURPOSE. The study is aimed at studying the effect of fuel gases of various component composition on the environmental performance of the GE 6FA gas turbine unit. Consider using hydrogen as primary sweat to minimize emissions and improve performance of the GE 6FA gas turbine. METHODS. To achieve this goal, the ASGRET (Automated system for gas-dynamic calculations of power turbomachines) software package was used. RESULTS. The article discusses promising directions for the utilization of CO2 using highly efficient technologies with further use or disposal. A mathematical model of a GE 6FA g

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Jing, Junmin, Weicheng Xie, Changquan Song, Yefei Zhang, Huan Xie, and Zehao Wang. "Research on loss characteristics and current-carrying capacity of low-smoke halogen-free cables." AIP Advances 13, no. 3 (2023): 035113. http://dx.doi.org/10.1063/5.0137057.

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The current-carrying capacity is one of the key factors that restrict the safe operation of cables. Accurately grasping the current-carrying capacity of cables is an important means to improve the efficiency and economic benefits of cable operation. The calculation standard of IEC60287 not only ignores the differences between different types of cables but also makes it difficult to make timely calculations and corrections according to the changes in cables during operation. Therefore, taking the WDZ-YJY3×16 cable as an example, the electromagnetic–thermal coupling simulation model is establish

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Barberis, Stefano, Francesco Peccianti, Luca Castellino, Thomas Bolognesi, and Alessandro Bortoletto. "SHIP2FAIR – Martini & Rossi: integration of Solar Heat in Industrial Process – Preliminary evaluation." E3S Web of Conferences 113 (2019): 03018. http://dx.doi.org/10.1051/e3sconf/201911303018.

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SHIP2FAIR is a H2020 European funded project†, which aim to foster the integration of solar heat in industrial processes from the agro-food sector facilitating the integration of solar heat production in low temperature processes. Based on the assessment of the industrial process for the production of different spirits and the local solar potential in Pessione plant (TO) of Martini & Rossi – one of the four demosite of the project -, the preliminary results that guided the choice of the most suitable solar collectors (Fresnel) and the definition of the thermo-economic parameters for the so

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Chen, Chien Chon, Chih Yuan Chen, Hsi Wen Yang, Yang Kuao Kuo, and Jin Shyong Lin. "Phase Equilibrium in Carbothermal Reduction Al2O3 → AlN Studied by Thermodynamic Calculations." Atlas Journal of Materials Science 1, no. 2 (2017): 30–37. http://dx.doi.org/10.5147/ajms.v1i2.120.

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As a ceramic with high economic value, aluminum nitride possesses high thermal conductivity, excellent electrical insulation, high mechanical strength and high melting temperature and these all are required in high technologies involving cooling, insulation, thermal expansion and corrosion. This paper deals with thermodynamic parameters which affect the Al2O3→AlN reduction efficiency during a carbothermal reduction. According to the carbothermal reduction reaction γ-Al2O3 + 3C + N2 → AlN + 3CO, if molar mixing ratio of γ-Al2O3:C = 1:3 at 1,601 °C or higher, the γ-Al2O3 can be reduced to AlN. T

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KOSENKO, L. V., O. O. KOVAL, Y. L. YURCHENKO, and O. A. TYMOSHENKO. "ENERGY EFFICIENCY OF THE HEATING SYSTEM OF THE PSACEA HIGH-RISE BUILDING." Ukrainian Journal of Civil Engineering and Architecture, no. 6 (January 14, 2023): 66–72. http://dx.doi.org/10.30838/j.bpsacea.2312.271222.66.912.

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The research aims to deepen the methodological and organisational-practical principles of energy efficiency for further application in the educational buildings thermal modernization. The relevance of the work is to reduce energy consumption by increasing the energy efficiency of buildings. Based on the calculations and research, the following scientific and practical results were obtained: - a technical inspection of the educational building heating system was conducted; - a thermal imaging survey was conducted and infiltration thermal failures of the building's heating syst

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Maksymov, Artem, and Oleksandr Halinskyi. "FEATURES OF THE ORGANIZATION OF THERMOMODERNIZATION PROJECTS." Management of Development of Complex Systems, no. 44 (November 30, 2020): 159–65. http://dx.doi.org/10.32347/2412-9933.2020.44.159-165.

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Organizational bases for the preparation and implementation of thermal modernization projects are defined by separate legislative acts and regulations, but they do not take into account certain features. Despite the sufficient number of publications on the solution of certain issues related to the thermal modernization of existing and new facilities, further research is needed in the organization and management of the processes of thermal modernization of existing facilities. As we have defined in previous publications, thermal modernization can be carried out during various types of construct

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Zanakhov, Timur O., Ekaterina E. Galenko, Mariya A. Kryukova, Mikhail S. Novikov, and Alexander A. Khlebnikov. "Isomerization of 5-(2H-Azirin-2-yl)oxazoles: An Atom-Economic Approach to 4H-Pyrrolo[2,3-d]oxazoles." Molecules 26, no. 7 (2021): 1881. http://dx.doi.org/10.3390/molecules26071881.

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An atom economical method for the preparation of variously substituted 4H-pyrrolo[2,3-d]oxazoles was developed on the basis of thermal isomerization of 5-(2H-azirin-2-yl)oxazoles. The latter were prepared by Rh2(oct)4 catalyzed reaction of 2-(3-aryl/heteroaryl)-2-diazoacetyl-2H-azirines with a set of substituted acetonitriles, benzonitriles, acrylonitrile and fumaronitrile. According to DFT calculations the transformation of 5-(2H-azirin-2-yl)oxazole to 4H-pyrrolo[2,3-d]oxazole occurs through the nitrenoid-like transition state to give a 3aH-pyrrolo[2,3-d]oxazole intermediate, followed by 1,5-

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M. A. Ibrahim, Said, and Mostafa E.M Samy. "Chemical, thermal and economic aspects for the energy balance of coal gasification power plants with and without CO2 recovery." International Journal of Engineering & Technology 7, no. 4 (2018): 2013. http://dx.doi.org/10.14419/ijet.v7i4.14116.

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This paper presents a methodology for studying the chemical, thermal processes and economics for the gasification systems employed in coal fired power stations through thermodynamic analyses based on thermodynamic laws in order to gain some new aspects of the plant performance. A resourceful computer program is developed and designed to calculate all necessary design and performance data for four selected coal fired power plants for all coal ranks. Detailed manual calculations were performed for the results. Comparison of computer and manual results are in excellent agreement which indicates t

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Md Zain, Mohd Norizan, Norhuda Abdul Manaf, and Ali Abbas. "Fabricated of Photovoltaic Thermal System with Phase Change Material." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 121, no. 2 (2024): 65–72. http://dx.doi.org/10.37934/arfmts.121.2.6572.

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At present, solar energy is widely recognized as one of the primary sources of renewable energy. Nonetheless, conventional solar photovoltaic (PV) panels suffer a significant decrease in efficiency when exposed to extreme temperatures, making them unsuitable for long-term operation. To address these limitations, hybrid photovoltaic thermal (PVT) systems with phase change materials (PCM) have emerged as sophisticated solutions, leveraging thermal energy for water heating and PCM for thermal energy storage. This work aims to evaluate key economic parameters of fabricated PVT system (with and wit

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Shashkin, V. Yu, S. I. Kuskarbekova, and A. V. Shashkin. "Improving the design of blast furnace blast regenerative devices by calculating coolant flows through the channels of the air heater nozzle." Safety and Reliability of Power Industry 17, no. 2 (2024): 112–18. http://dx.doi.org/10.24223/1999-5555-2024-17-2-112-118.

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The air heaters used for heating blast furnace blast have recently undergone a number of design changes, which has affected their key thermal performance indicators. There are established temperatures at which settled operating conditions show sufficient technical and economic performance. Deviation from the conditions by increasing the temperature of the hot blast entails negative consequences of a different nature, which ultimately makes it unfeasible from an economic point of view. New design solutions for air heaters must be determined by maximum temperatures, which affects the service lif

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Yudaev, I. V., A. A. Seregin, M. Yu Popov, R. V. Popova, and Yu V. Daus. "Design of an active subsurface system thermal energy supply to the bio-vegetation complex." IOP Conference Series: Earth and Environmental Science 1138, no. 1 (2023): 012020. http://dx.doi.org/10.1088/1755-1315/1138/1/012020.

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Abstract The efficiency of vegetable production in closed ground structures is directly dependent on the costs associated with creating artificial, controlled conditions for growing plants during the period when cultivation of them in open ground due to climatic conditions is impossible. One of the indicators of the economic efficiency of vegetable production in protected soil structures is labor costs and funds per 1 hundredweight, per 100 rubles of gross production, as well as energy costs, including thermal energy. Usually, solar, biological, electric and other types of heating are used to

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Vasilev, Semen, Evgeniy Barakhtenko, Nikita Pavlov, and Dmitriy Sokolov. "Approach development to the pipeline networks design an integrated heat and cold supply system on the example of Yakutsk city." E3S Web of Conferences 397 (2023): 02001. http://dx.doi.org/10.1051/e3sconf/202339702001.

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The pipeline networks design approach for integrated heat and cold supply systems based on absorption chillers has been developed. Within the framework of the approach, following tasks are solved: modeling consumers demand for cooling; hydraulic calculations of district cooling pipeline systems; technical and economic calculations to choose the optimal layout of pipeline systems; heat supply and cold supply systems repair and commissioning works compatibility assessment, and modeling of thermal interaction between permafrost massif and cold supply pipeline. The study of integrated heat and col

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Hussain, Hisham A. "An Increasing of the Thermal and Internal Efficiency for Steam Power Plant by Using the Best Economic Method." Tikrit Journal of Engineering Sciences 22, no. 2 (2015): 62–73. http://dx.doi.org/10.25130/tjes.22.2.08.

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The present work is devoted by an experimental study for an important parameters to increasing the thermal and internal efficiency for a steam power plant by reducing the condenser pressure, but there is a problem in condenser performance which is, air inter to inside condenser prevents it to continue with the same production. The experimental work was conducted using the steam power plant (Didacta- Italia) made in the university of Damascus/ syria .This study aim to (1) Reducing the condenser pressure to increase the thermal efficiency, (2)The condenser efficiency must be constant with time b

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Penjiyev, Ahmet M., and Parahat O. Orazov. "Thermal Energy Resource Potentials of the Kara-Bogaz-Gol Gulf as a “Solar Pond”." Engineering technologies and systems 34, no. 3 (2024): 474–94. http://dx.doi.org/10.15507/2658-4123.034.202403.474-494.

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Introduction. The use of environmentally-friendly engineering systems including solar energy technologies makes it possible to reduce energy costs and therefore to lower production costs and anthropogenic stress on the environment.Aim of the Study. The authors used innovative techniques to assess the thermal resource potential of solar radiation, to analyze the salt deposits of the Kara-Bogaz-Gol Gulf as thermal accumulators for the development, introduction and use of solar thermal technologies and to justify the technical and economic feasibility of their use in engineering systems in the Ka

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