Відновлювана енергетика та енергоефективність у XXI столітті

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Перегляд Відновлювана енергетика та енергоефективність у XXI столітті за Назва

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    A study of the dependence of different structural solar cells on the base thicknesses and distances between contacts using modeling
    (Інститут відновлюваної енергетики НАН України, 2022) Abduvohidov, Murodjon Komilovich
    The main task of scientists around the world is to increase the efficiency of modern solar cells. But researching of them can be time consuming and economically expensive. These problems can be solved by simulation. In this article deals the problem of determining optimal values for base thicknesses and distances between contacts of solar cell.
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    About an environmentally friendly water use scheme for the integrated water resources management on carpathian rivers
    (Інститут відновлюваної енергетики НАНУ, 2020) Koturbach, I.; Stefanyshyn, D.
    Запропоновано оригінальну екологічно дружню дериваційну схему для комплексного використання водних ресурсів Карпатських річок. Схема може знайти практичне застосування при модернізації систем водопостачання та іригації, для контролю паводків та в малій гідроенергетиці.
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    Aluminum based composites for efficient hydrogen generation by hydrolysis process
    (Інститут відновлюваної енергетики НАНУ, 2021) Manilevich, F.; Pirskyy, Yu.; Kutsyi, A.; Berezovets, V.; Yartys, V.
    In present study we show that aluminum-based composites, prepared by ball milling of Al powders with Ga-InSn eutectic alloy and graphite, efficiently, with high rate and productivity, generate hydrogen gas during their interaction with water at temperatures as low as 5°С.
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    Aquaculture as an ecosystem - aquaponics with membranebio reactor
    (Інститут відновлюваної енергетики НАНУ, 2021) Schmidt, Ditmar
    Together with the Ben Gurion University (Israel) and the company Busse GmbH (Leipzig), the Solar Initiative Mecklenburg-Vorpommern e.V. has developed a new system for sustainable aqua and hydroponics (aquaponics with biomembrane reactor). The developed aquaponic facility makes it possible to breed fish and plants independently of other resources. Wherever people live, they also produce wastewater. This water can serve as the basis for the production of food (fish and plants).
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    Assessment of quantitative risk indicators of electric power system operation in case of failure of the loads with responsible consumers
    (Інститут відновлюваної енергетики НАН України, 2020) Bardyk, E.; Bondarenko, O.
    The article presents the basic ideas of assessment of quantitative risk indicators of electric power systems operation in case of failures of load with responsible consumers. It is proposed to use an integral risk index of functioning when evaluating the operational reliability of the EPS.
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    Comparison of planar and pyramidal textured silicon solar cell
    (Інститут відновлюваної енергетики НАН України, 2022) Urmanov, Botirjon; Aliev, Rayimjon; Gulomov, Jasurbek
    If morphology of the surface of the solar cell changes, depending on its photoelectric properties with angle of incident light will change. So, in this paper, photoelectric properties of silicon based solar cells which were covered with upright pyramids which angle of base was various, dependence on angle of incident light, was researched. From obtained results, it was found that when the angle of incident light is varied from 00 to 800, the short circuit current densities of planar, pyramidal textured silicon solar cell with 50.40 and 70.40 of angle of base of pyramids have been decreased to 82.6%, 88.8%, 89.8%, their open circuit voltages have been decreased to 10.5%, 12.8%, 14.1% as well as their fill factors have been decreased to 1.9%, 2.2%, 3.2%.
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    Criteria for selection of crystal hydrates for composite adsorbents with high energy storage density
    (Інститут відновлюваної енергетики НАНУ, 2021) Serhiienko, Y. O.; Sukhyy, K. M.; Belyanovskaya, E. A.; Kolomiyets, E. V.
    This work is devoted to the choice of crystal hydrates for composite adsorbents with high energy storage in order to study the properties and performance characteristics of nanocomposite adsorbents "silica gel - sodium sulfate" and "silica gel - sodium acetate". The value of heat energy release during adsorption of the order of 1500-4400 kJ / kg during several thousand cycles of heating - cooling has been achieved.
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    Development of integrated cleaning and disinfecting air installation with a heat pump heat recoverer in central air conditioning and ventilation systems
    (Інститут відновлюваної енергетики НАН України, 2022) Grabova, T.; Chalaev, D.; Kovaliov, V.; Goncharov, P.; Nabok, T.; Goncharova, O.
    An energy-efficient method for air purification and disinfection by plasma-assisted photocatalysis has been proposed.
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    Effect of preparation procedures and hydrolysis parameters on the hydrolysis performance of MgH2-MgCl2 nanocomposites
    (Інститут відновлюваної енергетики НАНУ, 2021) Korablov, D. S.; Bezdorozhev, O. V.; Solonin, Yu. M.
    Magnesium hydride is an attractive material for solid-state hydrogen storage and for hydrogen generation via hydrolysis due to its high capacity of hydrogen and low cost. However, the hydrolysis reaction of MgH2 is rapidly blocked by the Mg(OH)2 passivation layer, which can be destabilized by Cl– ions. By taking into account this fact, we performed high-energy ball milling synthesis of MgH2 with MgCl2 additive, and evaluated the effect of preparation procedures and hydrolysis parameters on the hydrolysis performance of the prepared materials.
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    Enablers and barriers for small hydropower development in Ukraine
    (Інститут відновлюваної енергетики НАНУ, 2021) Stefanyshyn, D. V.; Petrosian, A. G.
    Розглянуто ключові стимули та бар’єри для сталого розвитку малої гідроенергетики в Україні.
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    Energy efficiency as an integral component of the service-oriented logic of low-carbon transition
    (Інститут відновлюваної енергетики НАН України, 2022) Novoseltsev, O.; Kovalko, O.; Eutukhova, T.; Chuprina, L.
    The article presents the results of a study of service-oriented logic aimed at improving the organizational aspects of the implementation of energy efficiency (EE) projects in a low-carbon transition process. The models of service-dominant logic and product-service systems are considered, which allow systemically coordinating the actions of energy market participants with participants in the markets of component goods and services to reveal the synergistic effects of their interaction aimed at increasing EE.
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    Energy management in Ukraine's small business
    (Інститут відновлюваної енергетики НАНУ, 2019) Shevchenko, M.; Nakashidze, L.
    The article presents the main methodologies of energy management and the impact of its implementation on small Ukrainian enterprises.
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    Energy services as a base tool to support the low-carbon transition
    (Інститут відновлюваної енергетики НАНУ, 2021) Novoseltsev, O.; Kovalko, O.; Yevtukhova, M.
    The article presents the results of researching the processes of structure organizing the energy services market as a system tool aimed at improving energy efficiency, attracting renewable energy sources and reducing CO2 emissions. To do this, the methods of large systems analysis, conceptual logic and black box are used for determining the directions of development and construction of the model of the market structural organization
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    Energy storage with integrated thermal field emission conversion and insulation
    (Інститут відновлюваної енергетики НАН України, 2022) Blanovsky, А.
    Thermal energy storage (TES) supported concentrating solar power (CSP) systems with 3Dprinted photon-enhanced thermal field emission (PETFE) converters and plastic reflectors could dramatically lower the cost and energy payback time of the CSP technologies. The PETFE panels with a transparent anode, carbon nano-tube (CNT) ink printed on a dielectric substrate as a cathode surrounded on both sides by a gate can be used for direct on-sun heating and thermal insulation of the TES during off-sun hours. An additional PETFE converter design could have a thin anode containing a large number of cooling micro-channels to serve as the CSP receiver. CO2 gas from the PETFE anode at the temperatures of about 650°C heats sCO2 Brayton and/or steam Rankine cycles.
  • Ескіз
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    Energy-active fences with a static solar flow control system
    (Інститут відновлюваної енергетики НАНУ, 2020) Svirsa, V. I.; Nakashydze, L. V.
    Енергоактивні огородження представлені авторами як ефективна технологія використання відновлюваних джерел енергії. Ці огородження розглядаються як елемент складної системи енергозбереження споруди, а саме - як частина її зовнішніх несучих конструкцій [1]. Основою технології енергоефективних огороджень є горизонтальні поворотні теплочутливі жалюзі. Залежно від нахилу жалюзі відносно власної осі відбувається розподіл поглиненого тепла між стіною будівлі та активними елементами [2]. Пропонується система без поворотного механізму для тих випадків, коли потрібне статичне регулювання потоку або споживання максимально можливої кількості сонячної радіації. У цьому випадку, насамперед, важливо визначити розташування елементів статичної системи залежно від їх положення від напрямку Сонця так, щоб вони ефективно поглинало тепло за допомогою перенаправленого сонячного світла.
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    Evaluation of the influence of nonsinusoidal distortion source on the electricity quality of electrical power network with distributed sources of energy
    (Інститут відновлюваної енергетики НАНУ, 2019) Kuchanskyy, V. V.
    The research was devoted to the actual scientific and practical task - abnormal nonsinusoidal modes are characterized by the appearance of higher harmonics of current and voltage. The distortion of the voltage shape curve in this case is due to the nonlinearity of the magnetization shunts of no-loaded autotransformer
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    Experimental study on an adsorption cold storage bad used for supporting the air conditioning system in single-family house
    (Інститут відновлюваної енергетики НАНУ, 2020) Grzebielec, A.; Szelągowski, A.; Rusowicz, A.
    The article presents experimental results on open adsorption storage unit. According to the experiment there is calculated how large should be a cold storage unit for singlefamily house.
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    Facility management perspective on refurbishment of heritage building: life cycle analysis of protected building in Nedre Bakklandet 47
    (Інститут відновлюваної енергетики НАНУ, 2021) Bintang Noor Prabowo; Alenka Temeljotov-Salaj
    Refurbishing historic buildings to achieve EU standard emission levels as for newly built ones is challenging. Most of the heritage buildings are made within regulation restrictions that hinder them from reaching such emission reduction levels without compromising their cultural heritage value. A full life cycle analysis perspective then needs to be put into this context so that zero carbon emission could be obtained by the protected building from the "early phase" of the construction. The study is conducted by making a life cycle analysis assessment of the Bakklandet Children's Asylum (Nedre Bakklandet 47A).
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    Formation of ferroelectric domain structure for solar cells
    (Інститут відновлюваної енергетики НАНУ, 2021) Mazur, O.; Stefanovich, L.
    An innovative method for the formation of ferroelectric regular domain structures by rapid quenching of a sample in the ferroelectric phase and exposure of a high-frequency electric field is proposed. It is shown that polydomain structures form at any quenching depth, at frequencies above the critical value and amplitudes below the critical one. A model for calculating of parameters for controlling the process of domain ordering and changing the period of the expected regular domain structure has been developed
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    Graphen generator of electricity
    (Інститут відновлюваної енергетики НАНУ, 2020) Semenenko, R. Y.; Mikhalin, V. I.
    The paper presents the existing solution to the conversion of excess kinetic energy of Brownian motion of graphene membrane into electrical energy capable of supply to the low power consumers.