Articoli di riviste: "Trigeneration plants"

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Jamaluddin, Khairulnadzmi, Sharifah Rafidah Wan Alwi, Khaidzir Hamzah e Jiří Jaromír Klemeš. "A Numerical Pinch Analysis Methodology for Optimal Sizing of a Centralized Trigeneration System with Variable Energy Demands". Energies 13, n. 8 (19 aprile 2020): 2038. http://dx.doi.org/10.3390/en13082038.

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The energy and power sectors are critical sectors, especially as energy demands rise every year. Increasing energy demand will lead to an increase in fuel consumption and CO2 emissions. Improving the thermal efficiency of conventional power systems is one way to reduce fuel consumption and carbon emissions. The previous study has developed a new methodology called Trigeneration System Cascade Analysis (TriGenSCA) to optimise the sizing of power, heating, and cooling in a trigeneration system for a Total Site system. However, the method only considered a single period on heating and cooling demands. In industrial applications, there are also batches, apart from continuous plants. The multi-period is added in the analysis to meet the time constraints in batch plants. This paper proposes the development of an optimal trigeneration system based on the Pinch Analysis (PA) methodology by minimizing cooling, heating, and power requirements, taking into account energy variations in the total site energy system. The procedure involves seven steps, which include data extraction, identification of time slices, Problem Table Algorithm, Multiple Utility Problem Table Algorithm, Total Site Problem Table Algorithm, TriGenSCA, and Trigeneration Storage Cascade Table (TriGenSCT). An illustrative case study is constructed by considering the trigeneration Pressurized Water Reactor Nuclear Power Plant (PWR NPP) and four industrial plants in a Total Site system. Based on the case study, the base fuel of the trigeneration PWR NPP requires 14 t of Uranium-235 to an average demand load of 93 GWh/d. The results of trigeneration PWR NPP with and without the integration of the Total Site system is compared and proven that trigeneration PWR NPP with integration is a suitable technology that can save up to 0.2% of the equivalent annual cost and 1.4% of energy compared to trigeneration PWR NPP without integration.

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Underwood, Chris, Bobo Ng e Francis Yik. "Scheduling of Multiple Chillers in Trigeneration Plants". Energies 8, n. 10 (7 ottobre 2015): 11095–119. http://dx.doi.org/10.3390/en81011095.

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Jamaluddin, Khairulnadzmi, Sharifah Rafidah Wan Alwi, Zainuddin Abd Manan, Khaidzir Hamzah e Jiri Jaromir Klemeš. "Optimal Sizing of a Trigeneration Plant Integrated with Total Site System Considering Multi-period and Energy Losses". E3S Web of Conferences 287 (2021): 03014. http://dx.doi.org/10.1051/e3sconf/202128703014.

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Rising awareness for the environment as well as concerns over the sustainability of fossil fuels has encouraged developed and developing countries to find alternative ways to enhance the thermal efficiency of current power systems. The thermal efficiency of power plants can be increased from 30 – 40 % up to 80 – 90 % through the implementation of a trigeneration system by recovering dissipated waste heat for other purposes. The trigeneration system can be defined as a technology that can produce simultaneous power, heating, and cooling energy from the same fuel source. Trigeneration System Cascade Analysis (TriGenSCA) methodology is an optimisation approach based on Pinch Analysis that has been used to establish the guidelines or the proper size of the trigeneration system. This paper proposes a modification of TriGenSCA by considering a multi-period of energy consumption to optimise the size of the utility in the centralised trigeneration system by considering the transmission and storage of energy losses in the Total Site system. There are six steps involved including data extraction, identification of time slices, Problem Table Algorithm (PTA), Multiple Utility Problem Table Algorithm (MU PTA), Total Site Problem Table Algorithm (TS PTA), and modified TriGenSCA. The methodology has been tested on the centralised nuclear trigeneration system in a Total Site System as a case study and results shown that thermal energy needed by the Pressurized Water Reactor (PWR) trigeneration system with transmission losses is 2,427 MW whereas thermal energy needed by the PWR trigeneration system without transmission losses is 2,424 MW. The TriGenSCA with consideration of transmission and storage energy losses is useful for engineers and designers to determine the exact value of energy for trigeneration plant.

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Rojas Suarez, Jhan Piero, Mawency Vergel Ortega e Sofia Orjuela Abril. "Application of cogeneration and trigeneration systems". Revista Boletín Redipe 10, n. 5 (1 maggio 2021): 259–72. http://dx.doi.org/10.36260/rbr.v10i5.1302.

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The improvement in the energy efficiency of a thermoelectric power station and the implementation of cogeneration and trigeneration plants have great potential to mitigate the effects of energy consumption and its impact on the global problem of climate change. Public environmental policies in the Latin American context implement the use of unconventional energy sources through different mechanisms. This research identifies environmental policies focusing on the application of alternative cogeneration and trigeneration systems. To promote the application of these systems, each country presents tax incentives and the generation of programs. In Latin America, the country with the highest participation in cogeneration plants in Brazil, due to government support to eliminate barriers to the sale of surplus energy, and the strengthening of programs such as PROINFA. On the other hand, we have Chile, Peru, and Colombia, in which it shows government barriers to be able to sell the energy surpluses that are generated in cogeneration plants and so far maintain little participation in the generation of electrical energy from unconventional sources. In Colombia, it presents regulatory conditions for the electricity grid, which restricts the participation of “small energy generators.” However, in recent years, there has been greater participation in the energy matrix based on clean energy. The foregoing will allow recognizing the progress of the use of renewable energies in Colombia, specifically of the cogeneration plants, which is an estimated expansion of installed capacity of 314 MW.

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Klimenko, A. V., V. S. Agababov, I. P. Il’ina, V. D. Rozhnatovskii e A. V. Burmakina. "Layouts of trigeneration plants for centralized power supply". Thermal Engineering 63, n. 6 (24 maggio 2016): 414–21. http://dx.doi.org/10.1134/s0040601516060045.

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Rocha, M. S., R. Andreos e J. R. Simões-Moreira. "Performance tests of two small trigeneration pilot plants". Applied Thermal Engineering 41 (agosto 2012): 84–91. http://dx.doi.org/10.1016/j.applthermaleng.2011.12.007.

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Jamaluddin, Khairulnadzmi, Sharifah Rafidah Wan Alwi, Zainuddin Abdul Manan, Khaidzir Hamzah e Jiří Jaromír Klemeš. "A Process Integration Method for Total Site Cooling, Heating and Power Optimisation with Trigeneration Systems". Energies 12, n. 6 (16 marzo 2019): 1030. http://dx.doi.org/10.3390/en12061030.

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Research and development on integrated energy systems such as cogeneration and trigeneration to improve the efficiency of thermal energy as well as fuel utilisation have been a key focus of attention by researchers. Total Site Utility Integration is an established methodology for the synergy and integration of utility recovery among multiple processes. However, Total Site Cooling, Heating and Power (TSCHP) integration methods involving trigeneration systems for industrial plants have been much less emphasised. This paper proposes a novel methodology for developing an insight-based numerical Pinch Analysis technique to simultaneously target the minimum cooling, heating and power requirements for a total site energy system. It enables the design of an integrated centralised trigeneration system involving several industrial sites generating the same utilities. The new method is called the Trigeneration System Cascade Analysis (TriGenSCA). The procedure for TriGenSCA involves data extraction, constructions of a Problem Table Algorithm (PTA), Multiple Utility Problem Table Algorithm (MU PTA), Total Site Problem Table Algorithm (TS PTA) and estimation of energy sources by a trigeneration system followed by construction of TriGenSCA, Trigeneration Storage Cascade Table (TriGenSCT) and construction of a Total Site Utility Distribution (TSUD) Table. The TriGenSCA tool is vital for users to determine the optimal size of utilities for generating power, heating and cooling in a trigeneration power plant. Based on the case study, the base fuel source for power, heating and cooling is nuclear energy with a demand load of 72 GWh/d supplied by 10.8 t of Uranium-235. Comparison between conventional PWR producing power, heating and cooling seperately, and trigeneration PWR system with and without integration have been made. The results prove that PWR as a trigeneration system is the most cost-effective, enabling 28% and 17% energy savings as compared to conventional PWR producing power, heating and cooling separately.

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Stojiljković, Mirko, Mladen Stojiljković e Bratislav Blagojević. "Multi-Objective Combinatorial Optimization of Trigeneration Plants Based on Metaheuristics". Energies 7, n. 12 (22 dicembre 2014): 8554–81. http://dx.doi.org/10.3390/en7128554.

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Kulichikhin, V. V. "On violations of the Charter of the Russian Academy of Sciences (RAS)". Safety and Reliability of Power Industry 13, n. 2 (31 luglio 2020): 119–27. http://dx.doi.org/10.24223/1999-5555-2020-13-2-119-127.

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24.07.2016 a large group of academicians of the Russian Academy of Sciences (RAS) wrote a letter to the President of the Russian Federation V. V. Putin, in which they gave an unfavorable assessment of the current state of Russian science. The letter listed a number of measures aimed at correcting the current state of science, and noted that "the time of political correctness is over, it is high time to speak out openly calling things by their proper names".Meeting with a group of academicians of the Russian Academy of Sciences in December of 2016, the President of the Russian Federation V.V. Putin stressed the timeliness of setting the above problems and the need to eliminate the noted deficiencies, drawing attention to the fact that only outstanding scientists of international standing with significant scientific achievements should be elected as academicians of the RAS.In connection with the critical assessment of the current state of Russian science in its various fields, expressed in the aforesaid letter of the academicians, it is of some interest to analyze the scientific activities and scientific achievements of some Russian scientists, in particular, in the field of thermal power engineering. For this analysis, articles were used published in the Teploenergetika (Heat Power Engineering) journal as well as a Report prepared under agreement No.14.574.21.0017 with the Ministry of Education and Science of the Russian Federation (hereinafter — MoE&S) on improving the thermodynamic and technical-economic efficiency of trigeneration plants at distributed and small-scale power generation facilities.As follows from this analysis, the authors of the aforesaid publications mislead the scientific community and the MoE&S concerning the alleged increase of thermodynamic and technical-economic efficiency of trigeneration plants considered by them. There are no grounds for such conclusions, since the listed materials contain no specific results of experimental and/or calculation studies of thermodynamic and technical-economic efficiency of trigeneration plants. It is therefore very strange that a Committee of the MoE&S signed an Act certifying “proper” implementation of Agreement No. 14.574.21.0017.

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Buck, R., e S. Friedmann. "Solar-Assisted Small Solar Tower Trigeneration Systems". Journal of Solar Energy Engineering 129, n. 4 (27 marzo 2007): 349–54. http://dx.doi.org/10.1115/1.2769688.

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Solar-hybrid gas turbine power systems offer a high potential for cost reduction of solar power. Such systems were already demonstrated as test systems. For the market introduction of this technology, microturbines in combination with small solar tower plants are a promising option. The combination of a solarized microturbine with an absorption chiller was studied; the results are presented in this paper. The solar-hybrid trigeneration system consists of a small heliostat field, a receiver unit installed on a tower, a modified microturbine, and an absorption chiller. The components are described, as well as the required modifications for integration to the complete system. Several absorption chiller models were reviewed. System configurations were assessed for technical performance and cost. For a representative site, a system layout was made, using selected industrial components. The annual energy yield in power, cooling, and heat was determined. A cost assessment was made to obtain the cost of electricity and cooling power, and eventually additional heat. Various load situations for electric and cooling power were analyzed. The results indicate promising niche applications for the solar-assisted trigeneration of power, heat, and cooling. The potential for improvements in the system configuration and the components is discussed, also the next steps toward market introduction of such systems.

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Dabwan, Yousef N., e Pei Gang. "Thermo-economic analysis of integrated linear Fresnel reflector gas turbine trigeneration power plants". IOP Conference Series: Materials Science and Engineering 556 (19 agosto 2019): 012023. http://dx.doi.org/10.1088/1757-899x/556/1/012023.

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Hajabdollahi, Hassan, e Zahra Hajabdollahi. "Economic feasibility of trigeneration plants for various prime movers and triple load demands". Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 231, n. 3 (31 luglio 2015): 371–82. http://dx.doi.org/10.1177/0954408915597832.

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In this paper, after thermal and economic modeling of cogeneration plant, this system is optimized to find the optimal prime mover and their benefit for various cooling, heating, and electrical demand loads. To find the optimal prime mover and their benefit for each triple load, two new nondimensional design parameters including electric cooling ratio and nominal power ratio are defined. It is observed that, for example, for higher electrical and lower heating load demands, the gas engine is more profitable while for higher electrical and heating load demands, diesel engine is more profitable. In addition, some ranges of demand loads at which using CCHP plant is not profitable (in comparison with traditional system) are also obtained and presented. The optimum results obtained in NO SELL mode show that the highest values of actual annual benefit (AAB) are obtained for highest values of electrical load demand. This region corresponds with values of Hdmn/ Qdmn (heating to cooling load demand ratio) in the range of 1.5–3.5. The highest values of AAB for SELL mode are obtained to be in the range of 0.5–3.5 for Hdmn/ Qdmn (heating to cooling load demand ratio).

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Ubando, Aristotle T., Alvin B. Culaba, Kathleen B. Aviso e Raymond R. Tan. "Simultaneous carbon footprint allocation and design of trigeneration plants using fuzzy fractional programming". Clean Technologies and Environmental Policy 15, n. 5 (20 febbraio 2013): 823–32. http://dx.doi.org/10.1007/s10098-013-0590-x.

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Kosoy, Boris, Larisa Morozyuk, Sergii Psarov e Artem Kukoliev. "Synthesis of scheme-cycle designs of absorption water-ammonia thermotransformers with extended degazation zone". Eastern-European Journal of Enterprise Technologies 4, n. 8(112) (31 agosto 2021): 23–33. http://dx.doi.org/10.15587/1729-4061.2021.238203.

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The search for new and improvement of existing technical design of energy converter systems for specific consumers requires a reasonable choice of the most rational design for these objects. Thermotransformers that operate on the reverse and mixed thermodynamic cycles, in combination with power plants utilizing renewable and non-traditional primary energy (fuel), are considered to be of interest for small-scale power generation (trigeneration systems), which is consistent with the concept of distributed energy generation. Cold in trigeneration systems is provided by heat-using thermotransformers. This paper reports a method for synthesizing a scheme-cycle designs of absorption water-ammonia thermotransformers that utilize renewable heat sources with a low-temperature potential of 90–250 °С. A "cycle method" was applied to perform the thermodynamic analysis of the cycle of simple absorption thermotransformers with the expansion of the degazation zone with an increase in the temperature of the heating source; the technological schemes for the corresponding cycles have been substantiated. The influence of changing the degazation zone on the energy efficiency of the machine has been established. A scheme-cycle designs of the thermochemical compressor for a thermotransformer with a return supply of solutions to the generator and absorber at " excess temperatures" has been proposed, as a way to improve the cycle energy efficiency. A comparative analysis of the degree of thermodynamic perfection of the considered cycles has been performed using a specific example. The thermodynamic analysis demonstrated that the practical implementation of the scheme-cycle designs "with excess temperatures" could provide energy-saving conditions in small-scale trigeneration systems.

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Sztekler, Karol, Wojciech Kalawa, Sebastian Stefański, Jarosław Krzywanski, Karolina Grabowska, Marcin Sosnowski e Wojciech Nowak. "The influence of adsorption chillers on CHP power plants". MATEC Web of Conferences 240 (2018): 05033. http://dx.doi.org/10.1051/matecconf/201824005033.

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The simultaneous production of electricity, heat and cooling, the so-called trigeneration, allows for substantial savings in the chemical energy of fuels. More efficient use of the primary energy contained in fuels translates into tangible earnings for power plants while reductions in the amounts of fuel burned, and of non-renewable resources in particular, certainly have a favourable impact on the natural environment. The main aim of the above-described project was to analyse the influence of use adsorption contacted to conventional CHP power plant. An adsorption chiller is an item of industrial equipment that is driven by low grade heat and intended to produce chilled water and desalinated water. Adsorption chillers ACH can by used for utilization heat from many industrial process where temperature medium is too low for use absorption chillers. In this article modelled the cycle of a conventional heat power plant integrated with an adsorption chiller-based plant. Multi-variant simulation calculations were performed using IPSEpro simulation software.

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Conte, Benedetto, Joan Bruno e Alberto Coronas. "Optimal Cooling Load Sharing Strategies for Different Types of Absorption Chillers in Trigeneration Plants". Energies 9, n. 8 (25 luglio 2016): 573. http://dx.doi.org/10.3390/en9080573.

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Guebebia, Imen, e Mohamed Jomâa Safi. "Methodology of technico-economical performances evaluation of concentrating solar power (CSP) plants for trigeneration". Energy Sources, Part B: Economics, Planning, and Policy 12, n. 2 (febbraio 2017): 147–57. http://dx.doi.org/10.1080/15567249.2014.919042.

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DIJKEMA, GERARD P. J., CEES P. LUTEIJN e MARGOT P. C. WEIJNEN. "DESIGN OF TRIGENERATION SYSTEMS Process Integrated Applications of Energy Conversion Devices in Chemical Plants". Chemical Engineering Communications 168, n. 1 (gennaio 1998): 111–25. http://dx.doi.org/10.1080/00986449808912710.

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Ziębik, Andrzej, e Paweł Gładysz. "System effects of primary energy reduction connected with operation of the CHP plants". Archives of Thermodynamics 38, n. 2 (27 giugno 2017): 61–79. http://dx.doi.org/10.1515/aoter-2017-0010.

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AbstractThe paper is devoted to explication of one of the advantages of heat and electricity cogeneration, rarely considered in technical literature. Usually attention is paid to the fact that heat losses of the heat distribution network are less severe in the case of cogeneration of heat in comparison with its separate production. But this conclusion is also true in other cases when the internal consumption of heat is significant. In this paper it has been proved in the case of two examples concerning trigeneration technology with an absorption chiller cooperating with a combined heat and power (CHP) plant and CHP plant integrated with amine post-combustion CO2processing unit. In both considered cases it might be said that thanks to cogeneration we have to do with less severe consequences of significant demand of heat for internal purposes.

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Badami, M., A. Portoraro e G. Ruscica. "Analysis of trigeneration plants: engine with liquid desiccant cooling and micro gas turbine with absorption chiller". International Journal of Energy Research 36, n. 5 (7 febbraio 2011): 579–89. http://dx.doi.org/10.1002/er.1817.

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Espirito Santo, Denilson Boschiero do, e Waldyr Luiz Ribeiro Gallo. "Utilizing primary energy savings and exergy destruction to compare centralized thermal plants and cogeneration/trigeneration systems". Energy 120 (febbraio 2017): 785–95. http://dx.doi.org/10.1016/j.energy.2016.11.130.

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Sztekler, Karol, Wojciech Kalawa, Sebastian Stefanski, Jaroslaw Krzywanski, Karolina Grabowska, Marcin Sosnowski, Wojciech Nowak e Marcin Makowski. "Using adsorption chillers for utilising waste heat from power plants". Thermal Science 23, Suppl. 4 (2019): 1143–51. http://dx.doi.org/10.2298/tsci19s4143s.

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At present, energy efficiency is a very important issue and it is power generation facilities, among others, that have to confront this challenge. The simultaneous production of electricity, heat and cooling, the so-called trigeneration, allows for substantial savings in the chemical energy of fuels. More efficient use of the primary energy contained in fuels translates into tangible earnings for power plants while reductions in the amounts of fuel burned, and of non-renewable resources in particular, certainly have a favorable impact on the natural environment. The main aim of the paper was to investigate the contribution of the use of adsorption chillers to improve the energy efficiency of a conventional power plant through the utilization of combined heat and power waste heat, involving the use of adsorption chillers. An adsorption chiller is an item of industrial equipment that is driven by low grade heat and intended to produce chilled water and desalinated water. Nowadays, adsorption chillers exhibit a low coefficient of performance. This type of plant is designed to increase the efficiency of the primary energy use. This objective as well as the conservation of non-renewable energy resources is becoming an increasingly important aspect of the operation of power generation facilities. As part of their project, the authors have modelled the cycle of a conventional heat power plant integrated with an adsorption chiller-based plant. Multi-variant simulation calculations were performed using IPSEpro simulation software.

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Kosowski, Krzysztof, Karol Tucki, Marian Piwowarski, Robert Stępień, Olga Orynycz e Wojciech Włodarski. "Thermodynamic Cycle Concepts for High-Efficiency Power Plants. Part B: Prosumer and Distributed Power Industry". Sustainability 11, n. 9 (9 maggio 2019): 2647. http://dx.doi.org/10.3390/su11092647.

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An analysis was carried out for different thermodynamic cycles of power plants with air turbines. A new modification of a gas turbine cycle with the combustion chamber at the turbine outlet has been described in the paper. A special air by-pass system of the combustor was applied, and in this way, the efficiency of the turbine cycle was increased by a few points. The proposed cycle equipped with an effective heat exchanger could have an efficiency higher than a classical gas turbine cycle with a regenerator. Appropriate cycle and turbine calculations were performed for micro power plants with turbine output in the range of 10–50 kW. The best arrangements achieved very high values of overall cycle efficiency, 35%–39%. Such turbines could also work in cogeneration and trigeneration arrangements, using various fuels such as liquids, gaseous fuels, wastes, coal, or biogas. Innovative technology in connection with ecology and the failure-free operation of the power plant strongly suggests the application of such devices at relatively small generating units (e.g., “prosumers” such as home farms and individual enterprises), assuring their independence from the main energy providers. Such solutions are in agreement with the politics of sustainable development.

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Kalashnikov, Dmitriy, Yuriy Borisov e Elizaveta Kalashnikova. "Natural gas intracyclic attachment for energy generating unit based on gas turbine plant". E3S Web of Conferences 114 (2019): 06004. http://dx.doi.org/10.1051/e3sconf/201911406004.

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In this article, problems of effectiveness increasing in complex power supply are considered. Disadvantages of centralized power engineering and advantages of power engineering capabilities organization in immediate consumer proximity are presented. Consumer needs satisfaction in electricity, heat supply and cold supply are offered to be realized by conversion of district and quarter boiler houses to trigeneration stations, which are based on gas turbine plants units. In this research, solutions of problem related to lack of fuel gas pressure for gas turbine engine power, which is included in gas turbine plant of trigeneration stations, are suggested. As a result, after considering possible variants of fuel gas pressure increasing, it was decided that there is a perspective of using fuel gas intracyclic compression attachment. Its operating principle involves organization of main steam extraction in heat cycle for booster compressor drive, which compresses fuel gas before its transfer to combustor of gas turbine plant. Results of gas compressor and drive steam turbine design are presented. These parts are included in fuel gas intracyclic compression attachment in specific unit of gas turbine plant. Also, general recommendations about new compressor and turbine stages design for any other units of gas turbine plant are pointed. Further, in the article, two variants of thermal circuit, based on gas turbine plant, are suggested. The first one is a circuit with hot water boiler, where exhaust gas recuperation after turbine is carried out for producing steam, related to fuel gas intracyclic compression attachment demands, and heat system water heating for consumer heat supply system. The second variant involves development of typical gas turbine plant unit in power station with exhaust boiler. There fuel gas intracyclic compression attachment is activated by steam work after exhaust boiler. Then, variants of diagram are compared between each other. Also advantages and disadvantages each of them are considered.

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Varaksin, A. Yu, A. N. Arbekov e A. A. Inozemtsev. "The trigeneration cycle as a way to create multipurpose stationary power plants based on conversion of aeroderivative turbofan engines". Doklady Physics 59, n. 10 (ottobre 2014): 495–97. http://dx.doi.org/10.1134/s1028335814100085.

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Arbekov, A. N., A. Yu Varaksin e A. A. Inozemtsev. "Influence of the by-pass ratio of a basic turbofan engine on the possibility of creating aeroderivative trigeneration power plants". High Temperature 53, n. 6 (novembre 2015): 899–903. http://dx.doi.org/10.1134/s0018151x15050028.

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Teke, A., K. Zor e O. Timur. "A simple methodology for capacity sizing of cogeneration and trigeneration plants in hospitals: A case study for a university hospital". Journal of Renewable and Sustainable Energy 7, n. 5 (settembre 2015): 053102. http://dx.doi.org/10.1063/1.4930064.

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Sultanov, Makhsud, Elena Zenina, Olga Zhelyaskova e Dmitry Erofeev. "Optimization of Equipment Capacity of Power Park in Volzhskiy Branch of MPEI". E3S Web of Conferences 288 (2021): 01055. http://dx.doi.org/10.1051/e3sconf/202128801055.

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The article describes the development of an innovative microgrid landfill on the territory of the branch of NRU MPEI in Volzhskiy. The power park is considered as a microgrid with traditional and renewable energy sources. The aim of this facility is to provide heat and electricity to the institute's building and a practical study of the operation and maintenance of power equipment. The types of cogeneration plants are defined. Possible variants of the equipment layout with the determination of the power factor of each unit are considered. Trigeneration is proposed for the profitable use of the thermal steam of the units, which will contribute to saving electricity for cooling the institute in the summer. By analogy with the mathematical theory of Sharpe-Markowitz and J. R. R. Tolkien a graph of the dependence of the cost of 1 kWh and the risk assessment of energy supply in % of all equipment layout options of each variant is constructed. Based on the obtained data, a conclusion is formed about the optimization of power equipment for the Power Park.

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Di Palma, Diego, Marco Lucentini e Flavio Rottenberg. "Trigeneration Plants in Italian Large Retail Sector: a Calculation Model for the TPF Projects with Evaluation of all the Incentivizing Mechanisms". Journal of Sustainable Development of Energy, Water and Environment Systems 1, n. 4 (dicembre 2013): 375–89. http://dx.doi.org/10.13044/j.sdewes.2013.01.0028.

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Коновалов, Дмитро Вікторович, Роман Миколайович Радченко, Галина Олександрівна Кобалава, Сергій Георгійович Фордуй e Віктор Павлович Халдобін. "Розробка програмного комплексу раціонального проектування систем охолодження на основі термопресорних технологій". RADIOELECTRONIC AND COMPUTER SYSTEMS, n. 1 (27 febbraio 2021): 60–69. http://dx.doi.org/10.32620/reks.2021.1.05.

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The most common way to increase power and reduce fuel consumption by modern power plants is contact cooling of a gas or air flow by water injection. A promising development of this direction is to use aerothermopressor technologies. The use of heat air, which is compressed by the power plant compressors, accelerates the flow to a speed close to the sound one and almost instantaneous evaporation of injected water (the effect of thermo-gas-dynamic compression). It is important to determine the rational parameters of the organization of thermophysical and hydrodynamic processes when developing such technologies. In this case, one should be taken into account the appropriate development of the flow path design and a special software product. It is necessary to use methods and means to determine the optimal operating parameters of the power plant heat recovery systems. This paper presents a block diagram and an algorithm of a rational methodology for designing an aerothermopressor, which makes it possible to accurately determine the efficiency of using an aerothermopressor as part of a power plant (based on a gas turbine engine) for cooling cycle air, considering the peculiarities of operating modes in the flow path, as well as under various climatic operating conditions. The algorithm of a rational methodology for designing aerothermopressor technologies allows calculating the characteristics of equipment, systems, and circuit design solutions when used as part of a power plant: an electric generator; heat-using refrigerating machines (ejector refrigerating machines, absorption refrigerating machines); turbine generator or steam generator as part of a trigeneration unit or as part of a turbo-compound unit (power plants of marine vessels); recovery boiler of one or two pressures. Modeling the aerothermopressor-cooling system operation makes it possible to reveal the effectiveness of using such a system as part of a power plant and compare it with traditional methods of cooling and humidifying cycle air.

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Morozyuk, Larisa, Viktoriia Sokolovska-Yefymenko, Yaroslav Petushkov, Maksym Sharaiev e Sergii Psarov. "Design of a refrigerated complex for short-term storage of tropical fruits with a solar energy plant". Technology audit and production reserves 3, n. 3(59) (2 luglio 2021): 50–57. http://dx.doi.org/10.15587/2706-5448.2021.235594.

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The object of research is a refrigerated complex for short-term storage of tropical fruits in conditions of significant seasonal and daily fluctuations in ambient temperature, that typical for regions with a tropical climate. One of the problems is that the complexes are autonomous small firms for the year-round processing and storage of tropical fruits, located far from the central electric networks. In the presence of solar radiation, the complexes receive energy from small solar power plants. Such complexes are called «trigeneration system». In the course of the study, data on modes were used low temperature heat treatment and preservation of various tropical fruits, ripening times and climatic conditions of Tunisia. It has been established that citrus fruits are stored in chambers with high temperature, olives are frozen and stored for a short time before processing. The total amount of heat entering the citrus chambers is determined by changes in the ambient temperature. The thermal load of the olives chamber is determined by the heat treatment time. It was found that the cargo capacity of chambers with different temperatures differs six times. The thermal load of the olive storage chambers is only four times less. This is due to the peculiarities of the building structure of the complex, technological processes of cooling and freezing. Based on the thermal calculation, the cooling of the chambers is provided by a two-stage booster refrigeration machine with CO2 refrigerant in a transcritical cycle. To ensure the operation of the complex, a solar photoelectric converter is designed. This ensures the environmental safety of the complex and the possibility of obtaining energy savings by regulating the thermal power of the compressors with frequency converters, depending on the ambient temperature. The designed complex can be offered to a private investor for practical implementation.

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"FCE, Air Products to market trigeneration fuel cell power plants". Fuel Cells Bulletin 2012, n. 3 (marzo 2012): 4–5. http://dx.doi.org/10.1016/s1464-2859(12)70067-6.

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33

Melnikov, Viktor, e Yermek Isenov. "PRELIMINARY SUBSTANTIATION OF ADVANCED DIRECTIONS OF MODERNIZATION OF COAL-FIRED POWER PLANTS TO IMPROVE EFFICIENCY". InterConf, 19 giugno 2021, 295–314. http://dx.doi.org/10.51582/interconf.7-8.06.2021.032.

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The article considers issues related to the modernization of coal-fired power technologies. To increase the efficiency of energy resources, operational reliability, loss reduction and environmental safety the possibilities of trigeneration are considered with application of fuel cells, hydrogen technologies and RE-components that are expedient to use for additional electric energy production. The possibilities of innovative energy components to integrate them into traditional power generation systems are shown, technological schemes are given.

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Nourin, Farah Nazifa, Ahmad I. Abbas, Mohammad D. Qandil e Ryoichi S. Amano. "Analytical Study to Use the Excess Digester Gas of Wastewater Treatment Plants". Journal of Energy Resources Technology 143, n. 1 (29 luglio 2020). http://dx.doi.org/10.1115/1.4047603.

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Abstract This study presents an analytical method that can be used to enhance the power production rate and the energy-saving at wastewater treatment plants. The digester used at wastewater treatment plants produces digester gas by anaerobic digestion, with which biofuel production can be achieved. Biofuels can be used to meet some of the energy requirements of the wastewater treatment facility through combined heat and power (CHP) gas engines (cogeneration). Using micro gas turbine (MGT), a CHP technology can be introduced in wastewater treatment plants (WWTPs). The combination of MGTs and absorption chillers is a promising technology as it produces electricity, heating, and cooling simultaneously. The study demonstrated how the waste heat of MGTs could be used to drive absorption chillers. In this analytical study, a detailed technical and economic analysis is provided on the trigeneration system, i.e., the integration of MGTs and absorption chillers driven by waste digester gas of the wastewater treatment plants. It can meet the heating and cooling demands of the plants, which promote the reduction of utility costs. The technology presented is also useful for other thermal energy users.

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35

Sdringola, Paolo, Stefania Proietti, Davide Astolfi e Francesco Castellani. "Combined Heat and Power Plant and District Heating and Cooling Network: A Test-Case in Italy With Integration of Renewable Energy". Journal of Solar Energy Engineering 140, n. 5 (18 giugno 2018). http://dx.doi.org/10.1115/1.4040196.

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The 2012 European energy efficiency directive supported the development of cogeneration combined heat and power (CHP) and district heating and cooling (DHC) networks, stressing the benefits of a more efficient energy supply, the exploitation of recovered heat, and renewable resources, in terms of fuel consumption and avoided costs/emissions. Policy decisions play a crucial role: technical and environmental feasibility of CHP is clear and well demonstrated, whereas economic issues (fuel prices, incentives, etc.) may influence its actual application. In this framework, the introduction of low-carbon technologies and the exploitation of renewable energies are profitable interventions to be applied on existing plants. This work focuses on a small CHP plant, installed in the 90 s and located within a research facility in Italy, designed to supply electricity and heat/cool through a district network. On the basis of monitored consumption of electricity, heating, and cooling, energy fluxes have been analyzed and an assessment was performed to get a management profile enhancing both operational and economic parameters. The integration of renewable energies, i.e., solar-powered systems for supporting the existing devices, has been evaluated, thus resulting in a hybrid trigeneration plant. Results demonstrate how the useful synergy between CHP and DHC can not only be profitable from the economic point of view, but it can also create conditions to considerably boost the integral deployment of primary energy sources, improving fuel diversity and then facing the challenge of climate change toward sustainable energy networks in the future.

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