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    Wyświetlanie 1-7 z 7
    Tytuł:
    A review of energy saving and energy effective roofings
    Przegląd energooszczędnych rozwiązań pokryć dachowych
    Autorzy:
    Savchenko, Olena
    Powiązania:
    https://bibliotekanauki.pl/articles/2175046.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Częstochowska
    Tematy:
    nsulated roof
    double-skin roof
    cool roof
    green roof
    biosolar roof
    roof ponds
    dach izolowany
    dach dwupłaszczowy
    dach chłodzony
    dach zielony
    dach biosolarny
    taras
    Opis:
    This article is a systematic review of the literature on the energy efficiency and energy efficient construction of roofs. This paper considers seven types of roof, including insulated, double-skin, cool roofs, green roofs, roofs with photovoltaic panels, biosolar roof and roof ponds. The review covers the main characteristics of each roof, the reduction of heat flux and the appropriate climate for its implementation. These roofs can reduce energy consumption for cooling or heating systems. For the cold period of the year the warmed roof which reduced heat losses of the room to 70% proved to be the most effective. In hot climates the cool roof is the simplest covering, which reduces the flow of solar radiation into the room by 30%. The installation of a double-skin roof or a pond on the roof stabilizes the temperature in the room on hot days. Green roofs in hot climates can reduce the heat of solar radiation through the roof to 35%, and the presence of photovoltaic panels on the green roof can increase their efficiency by 8.3%. To increase the energy efficiency of the roof, it is advisable to combine several types of roofs.
    Artykuł stanowi przegląd literatury dotyczącej energooszczędnych rozwiązań konstrukcji dachów. W artykule omówiono siedem rozwiązań dachów, w tym dach izolowany, dach o podwójnej konstrukcji, dach chłodzony, dach zielony, dach z panelami fotowoltaicznymi, dach biosolarny i taras. Przegląd zawiera charakterystykę każdego dachu, redukcję strumienia ciepła oraz wskazuje warunki klimatyczne odpowiednie do zastosowania takiego rozwiązania. Zastosowanie odpowiednich rozwiązań może zmniejszy zużycie energii na chłodzenie lub ogrzewanie. W okresie zimowym najkorzystniejszy okazał się dach ocieplony, który pozwala na zmniejszenie strat ciepła do 70%. W klimacie gorącym najlepszym rozwiązaniem jest powłoka chłodząca, która ogranicza dopływ promieniowania słonecznego do pomieszczenia o 30%. Zastosowanie dachu podwójnego lub tarasu pozwala na stabilizację temperatury w pomieszczeniu w upalne dni. Zielone dachy w gorącym klimacie mogą zmniejszyć ciepło promieniowania słonecznego przez dach do 35%, a obecność paneli fotowoltaicznych może podnieść ich wydajność o 8,3%. Aby zwiększyć efektywność energetyczną dachu, zaleca się łączenie kilku rodzajów dachów.
    Źródło:
    Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo; 2021, 27 (177); 219-224
    0860-7214
    Pojawia się w:
    Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Possibilities of using the energy potential of geothermal waters in the case of Poland and Ukraine
    Autorzy:
    Lis, Anna
    Savchenko, Olena
    Powiązania:
    https://bibliotekanauki.pl/articles/31342620.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Częstochowska
    Tematy:
    geothermal energy
    geothermal water
    geothermal installation
    energia geotermalna
    wody geotermalne
    instalacja geotermalna
    Opis:
    The development of energy based on RES is an important element of the policy of sustainable development and maintaining energy security. The difficult situation in the energy sector is turning more and more countries towards alternative energy sources. The feasibility of obtaining energy from renewable sources is linked primarily to the resources that are also economical. The main advantage of geothermal waters is that they can be used to produce heat or electricity, regardless of the time of day or climatic conditions. Data from geological research allows us to conclude that both Ukraine and Poland have favorable conditions for the use of energy from low and medium temperature geothermal waters. Ukraine is also turning to the possibility of using geothermal energy to produce electricity. Examples highlighting the possibility of using the energy potential of geothermal waters in the Lviv region and the Czestochowa poviat were presented.
    Źródło:
    Budownictwo o Zoptymalizowanym Potencjale Energetycznym; 2022, 11; 181-194
    2299-8535
    2544-963X
    Pojawia się w:
    Budownictwo o Zoptymalizowanym Potencjale Energetycznym
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of the influence of the heat-absorbing surface of an air-cooled solar collector on its thermal and mechanical properties
    Autorzy:
    Zhelykh, Vasyl
    Ulewicz, Małgorzata
    Kozak, Krystyna
    Savchenko, Olena
    Kasynets, Mariana
    Powiązania:
    https://bibliotekanauki.pl/articles/88616.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    solar air collector
    heat-absorbing plate
    flow turbulators
    thermal power
    air channel
    powietrzny kolektor słoneczny
    płyta pochłaniająca ciepło
    turbulatory przepływowe
    energetyka cieplna
    kanał powietrzny
    Opis:
    This paper presents the analysis of existing forms of heat absorbing surfaces of air solar collectors, which gained the greatest popularity in the world. The obtained data allowed to conclude that there is a need for the development of solar collectors with air as a coolant with an improved form of heat absorber, which will reduce the operational and capital costs of solar systems and allow the efficient use of such structures in a moderate climate without additional mechanisms for the transfer of coolant. The use of computer simulation helped to compare the thermal characteristics of air-borne solar collectors of a different design. The substantiation of the expediency of installing as a heat absorber of flow turbulators in the form of a screw has been fulfilled, as well as the height of the air channel of the solar collector has been determined, in which the maximum heating of the transfer medium is observed. In addition, the loss of pressure in the air channel of the solar collector with flow turbulators was determined and the comparison of the obtained data with the values of pressure losses in the air collector of the matrix type and the air collector with V-shaped ribs was made.
    Źródło:
    System Safety : Human - Technical Facility - Environment; 2019, 1, 1; 481-489
    2657-5450
    Pojawia się w:
    System Safety : Human - Technical Facility - Environment
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of air jets velocity attenuation at special initial conditions
    Autorzy:
    Voznyak, Orest
    Spodyniuk, Nadiia
    Savchenko, Olena
    Dovbush, Oleksandr
    Kasynets, Mariana
    Datsko, Oleksandra
    Powiązania:
    https://bibliotekanauki.pl/articles/2146736.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    air distribution
    swirl jet
    rectangular jet
    compact jet
    flat jet
    dystrybucja powietrza
    strumień powietrza
    Opis:
    The article is devoted to solving the significant problem of efficiency increasing of air distribution in the premise by swirl air jet. The aim of the article is to decrease coefficient of velocity attenuation due to intensification of initial turbulence of different air streams leakage from the air distributor and to obtain of analytical equations for calculation of air distribution in a room to ensure the normative indoor air parameters. Effect of flow twisting results in a reduction of the velocity attenuation coefficient by 2.4 times. The regression analysis testified that the attenuation coefficient of the swirl air jet is more affected by the angle of the twisting plates inclination and less affected by the angle of change of the air flow direction. The attenuation coefficient of all types of rectangular air jets is more influenced by the the ratio of the sides of slit b/l and the angle of change of the air flow direction is also less affected. To minimize the attenuation factor, it is effective to use air distributors at smaller swivel plates inclination angles for swirl air jets and a smaller slit size ratio for all types of rectangular air jets.
    Źródło:
    Diagnostyka; 2022, 23, 3; art. no 2022308
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Diagnosis of three types damages to the ventilation system
    Autorzy:
    Voznyak, Orest
    Spodyniuk, Nadiia
    Sukholova, Iryna
    Savchenko, Olena
    Kasynets, Mariana
    Datsko, Oleksandra
    Powiązania:
    https://bibliotekanauki.pl/articles/2096172.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    air distribution
    air velocity
    swirled air jet
    compact air jet
    flat air jet
    dystrybucja powietrza
    prędkość powietrza
    system wentylacyjny
    diagnostyka
    Opis:
    The article is devoted to solving of urgent problem to eliminate damage in ventilation system. That is caused by non-adequate long range, stagnant unventilated areas in the room existance and high noise level in the premises at air distribution by swirled air flow, compact air jet, flat air stream and rectangular air jet. A noise level of air supply with swirled air flow, compact air jet, flat air jet and rectangular air stream in the room has been investigated. It is shown that in order to achieve the maximum noise level decreasing it is necessary to ensure its supply by jets, which less intensively attenuate before entering the premise working area. Results of the experimental research are presented as graphical and analytical dependences. The acoustic properties of the swirled air flow, compact air jet, flat air stream and rectangular air jet have been investigated and means of situation improving have been determined. The results of experimental research of air supply to the room are presented. It is established that with the increase of the angle of swirling plates inclination and ratio of the slit sides the air jets noise level decreases.
    Źródło:
    Diagnostyka; 2022, 23, 1; 1--10
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of premise infrared heating and ventilation with an exhaust outlet and flat decking air flow
    Autorzy:
    Voznyak, Orest
    Spodyniuk, Nadiia
    Savchenko, Olena
    Dovbush, Oleksandr
    Kasynets, Mariana
    Datsko, Oleksandra
    Powiązania:
    https://bibliotekanauki.pl/articles/2096185.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    infrared heater
    air distribution
    air velocity
    flat air jet
    flow rate
    promiennik podczerwieni
    dystrybucja powietrza
    prędkość powietrza
    natężenie przepływu
    Opis:
    The article is devoted to solving of urgent problem to analyse energy saving effect from radiant heating and ventilation of premise with exhaust outlet and flat decking air jet. The aim of the work is analysis of energy efficiency of radiant heating systems using infrared heaters and ventilation of the premise due to the effect of a flat decking air jet on the surface of the heater; determination the amount of heat received both by flat decking air jet from the infrared heater when laying on its flat surface and amount of heat from the exhaust air entering the recuperator. Use of the infrared heaters in combination with an air distribution of the ventilation system with the flat decking air jets is effective, as it allows to achieve savings in heat load of the ventilation system in the range of 11%-19%. The amount of heat recovery of the exhaust air removed by the exhaust outlet is 30-40 W that equals 15%-20%. Saving the heat load of the ventilation system allows reducing the actual initial temperature of the tidal flat decking air jet and achieving a total saving of thermal energy of 24%-34%.
    Źródło:
    Diagnostyka; 2022, 23, 2; art. no. 2022207
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modeling of the Elastic Plates of Non-Base Configurations for the Cams of Automatic Half-Hose Machines
    Autorzy:
    Berezin, Leonid
    Savchenko, Kyrylo
    Rubanka, Mykola
    Polishchuk, Oleh
    Oliinyk, Olena
    Rubanka, Alla
    Powiązania:
    https://bibliotekanauki.pl/articles/2024179.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    elastic plate of the cam
    strength
    flexibility
    Finite Element Method
    Code-Aster
    płyta sprężysta krzywki
    wytrzymałość
    elastyczność
    Metoda Elementów Skończonych
    Opis:
    The purpose of the work was analytical research and computer modeling of the influence of shape and size of console beams of elastic plates in non-base configurations for the cam of the automatic half-hose machine under the conditions of flexibility, strength, and minimization of sizes. The scientific novelty of the work lies in the further development of the theory and methodology of designing the elements of knitting systems of the automatic half-hose machines based on regimes of loading, limitations in strength and dimensions, as well as requirements of the technological process. In order to increase the flexibility of the elastic plate, the symmetrical introduction of two console beams of trapezoidal shape was proposed. The influence exerted by the coefficient of the shape of console beams and their lengths on the magnitudes of deflections and stresses was analyzed, which allows making grounded and flexible decisions regarding the dimensions of the root and the end sections of the beams at the preliminary stage of design. The mathematical support was presented mainly in an explicit form, which simplified the analysis of the influence of controlled dimensions of the elastic plates on their flexibility and strength, as well as contributes to the comprehensive approach to the development of cams of different constructions with elastic plates and allows improving the quality and efficiency of design solutions of cams. The beam bending theory and the finite element method based on Code_Aster shared software were used. The model of the plate was represented by an ordered grid of finite nodal elements of the same size, without the use of elongated and flat elements. According to the results of simulation experiments, the distributions of deformations and stresses on the surface of the elastic plate of the cam were obtained, depending on its shape and size, which confirmed the validity of calculated recommendations.
    Źródło:
    Advances in Science and Technology. Research Journal; 2021, 15, 1; 92-98
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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