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    Tytuł:
    Solar systems
    Autorzy:
    Krawczyk, Dorota Anna
    Żukowski, Mirosław
    Redaro Serrano, Antonio
    Bullejos Martín, David
    Powiązania:
    https://bibliotekanauki.pl/chapters/4211364.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    solar irradiation
    solar collectors
    thermal applications
    solar thermal technologies
    Opis:
    It should be stressed that the level of solar radiation that reaches the Earth´s surface is relatively moderate and even very low, as for industrial applications. It involves high costs and technology to take advantage of this energy. In situations where the required energy flows are not very high, it is possible to use diffuse radiation, which has the advantage of not requiring any kind of movement of the solar receptors to track the sun throughout the day. On the other hand, if energy applications require higher values of solar radiation, it is possible to concentrate this energy, but only with the direct radiation, which restricts the location of these applications to the locations of large amount of sunlight.
    Źródło:
    Buildings 2020+. Energy sources; 49-98
    9788365596727
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Performance Study of Solar Power Source for Wireless Systems
    Autorzy:
    Mazurek, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/225988.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    photovoltaics
    renewable energy
    solar irradiation
    wireless power systems
    Opis:
    Photovoltaic (PV) technology is an attractive power source for systems with no wired connections to any network. Because of seasonal variations of solar irradiation, designing such a system requires careful analysis in order to provide required level of reliability. In this paper we present results of 16-month measurements of experimental PV system located in Poland. Obtained irradiation values have been verified with reference data from independent sources. The results of this work may be helpful in forecasting the performance of similar PV systems in the same region and allow to make more precise forecasts of power system performance than based only on average monthly irradiation tables.
    Źródło:
    International Journal of Electronics and Telecommunications; 2013, 59, 3; 271-276
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Variation in Direct Solar Irradiation with Relative Humidity and Atmospheric Temperature
    Autorzy:
    Wazwaz, Aref
    Khan, Mohd Shariq
    Powiązania:
    https://bibliotekanauki.pl/articles/124148.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    solar irradiation
    pyranometer
    relative humidity
    atmospheric temperature
    accumulative solar flux
    Opis:
    A class first Pyranometer was used to measure the direct solar irradiation and the obtained results were analyzed. Separate sensors were used to measure the relative humidity and the atmospheric temperature (RH/AT sensors). The measurements were conducted for the whole year of 2013. The author analyzed the collected solar data during one day, month, and year. The maximum, minimum, average, and accumulative solar irradiation (SR) were calculated and analyzed with connection to relative humidity and atmospheric temperature. The author found that April was characterized by the average maximum solar irradiation (SR= 1112±1W/m2), May had the maximum SR accumulation (13276552± 1W/m2). The maximum average percentage relative humidity found in July (% RH = 97± 3%), while the minimum average % RH is in December (% RH = 25± 3%). In May, the maximum average atmospheric temperature was 36.0 ± 0.6°C, while the average minimum was in January (AT= 19.1 ± 0.6°C). The total accumulation of solar flux during the year 2013 is 222 ± 1MW/m2.
    Źródło:
    Journal of Ecological Engineering; 2019, 20, 9; 38-43
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Proposed Model to Forecast Hourly Global Solar Irradiation Based on Satellite Derived Data, Deep Learning and Machine Learning Approaches
    Autorzy:
    Benamrou, Badr
    Ouardouz, Mustapha
    Allaouzi, Imane
    Ben Ahmed, Mohamed
    Powiązania:
    https://bibliotekanauki.pl/articles/123503.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    solar energy
    forecast
    global solar irradiation
    satellite-derived data
    GHI
    deep learning
    Opis:
    An accurate short-term global solar irradiation (GHI) forecast is essential for integrating the photovoltaic systems into the electricity grid by reducing some of the problems caused by the intermittency of solar energy, including rapid fluctuations in energy, management storage, and the high costs of electricity. In this paper, the authors proposed a new hybrid approach to forecast hourly GHI for the Al-Hoceima city, Morocco. For this purpose, a deep long short-term memory network is trained on a combination of the hourly GHI ground measurements from the meteorological station of Al-Hoceima and the satellite-derived GHI from the neighbouring pixels of the point of interest. Xgboost, Random Forest, and Recursive Feature Elimination with cross-validation were used to select the most relevant features, the lagged satellite-derived GHI around the point of interest, as input to the proposed model where the best forecasting model is selected using the Grid Search algorithm. The simulation and results showed that the proposed approach gives high performance and outperformed other benchmark approaches.
    Źródło:
    Journal of Ecological Engineering; 2020, 21, 4; 26-38
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical Predictions for Global Climate Changes
    Autorzy:
    Potrzeba-Macrina, Amy L.
    Zurbenko, Igor G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030575.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Kolmogorov-Zurbenko filters
    global temperature
    sunspot numbers
    total solar irradiation
    Opis:
    Solar irradiation is the major source of energy delivered to Earth’s atmosphere. Satellite measurements of total solar irradiation are proportional in time to sunspot numbers. Sunspot numbers have a well-organized periodic nature that is predictable in time. At the present time solar activity is in a very low phase and will be increasing over the next few decades. The atmosphere’s consumption of solar energy strongly depends upon the percentages of carbon dioxide and water vapor in it, which can cause greenhouse effects. The recent increases in the percentage of water vapor and carbon dioxide in the atmosphere have caused global warming. Water levels are affected by melting glaciers. The purpose of this paper is to separate the influence of solar activity and greenhouse effects on global warming and to forecast these influences for several decades.
    Źródło:
    World Scientific News; 2020, 144; 208-225
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of Regional Global Climate Changes due to Human Influences
    Autorzy:
    Zurbenko, Igor G.
    Potrzeba-Macrina, Amy L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1065361.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Kolmogorov-Zurbenko time and space filtration
    separation of scales
    total solar irradiation
    Opis:
    In recent years global climate change has been the focus of much scientific research as well as a focal point in the media. A recent period of significant increases in global temperatures has caused much concern. This period was followed by a relative slowdown, which in turn has created confusion. There are two major reasons for global temperatures variations, one of which is oscillations of total solar activity in time. Another reason is atmospheric pollutants causing greenhouse effects. Obviously, solar activities cannot be controlled, but relevant pollutants can. Since these two reasons are independent components of global temperature variations, they must be separated in order to adequately study global climate changes. Solar irradiation transferred to Earth is proportional to sunspot numbers, which have been recorded for centuries. The purpose of this paper is to separate this solar component from long-term temperature data, thus leaving for examination the component created by human activities. This separation of components and examination thereof can be performed at numerous locations over Earth, that is, the time component and rates of its increases can be mapped over the globe. This paper smooths these images to display the different rates of temperature increases over different global regions, which allows for a comparison of different regional efforts to fight climate changes. In some regions, negative rates were occurring as of recent years, but other regions those rates are becoming alarmingly high. The average rate of temperature increase due to human influence over the planet is remaining positive. The regional comparisons offer a great opportunity for assessing different methods of control of global climate changes.
    Źródło:
    World Scientific News; 2019, 132; 1-15
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Porównanie modeli promieniowania słonecznego
    Comparison of the solar radiation models
    Autorzy:
    Chwieduk, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/104303.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
    Tematy:
    promieniowanie słoneczne
    modele promieniowania słonecznego
    promieniowanie słoneczne dyfuzyjne
    napromieniowanie
    usytuowanie powierzchni
    Polska
    solar irradiation
    solar diffuse radiation models
    irradiation
    surfaces of different location
    Polska
    Opis:
    W artykule porównano wyniki obliczeń napromieniowania słonecznego na powierzchnię skierowaną w różnych kierunkach oraz pochylonych pod różnym kątem. Do obliczeń wykorzystano dane meteorologiczne zaczerpnięte z kilku stacji pogodowych zlokalizowanych w Warszawie, Suwałkach, Gdańsku i Kołobrzegu. Dane napromieniowania na powierzchnię poziomą zostały zaczerpnięte ze strony internetowej www.meteonorm.com. W pierwszej kolejności przedstawiono porównywane modele promieniowania słonecznego. Wskazano jakiego rodzaju promieniowanie słoneczne jest uwzględniane w poszczególnych modelach. W następnym kroku porównano wartości napromieniowania dla powierzchni skierowanej na południe i pochylonej pod kątem 45º względem horyzontu w czterech uwzględnionych miejscowościach. Wskazano różnice w wynikach obliczeń przeprowadzonych obydwoma modelami i opisano z czego one wynikają. Kolejnym etapem analizy było wyznaczenie odpowiednich usytuowań powierzchni maksymalizując zyski energetyczne w przeciągu całego roku, w okresie letnim oraz zimowym. Na koniec porównano napromieniowanie na powierzchnie pochylone pod kątem 45º zorientowane w cztery strony świata i wyciągnięto odpowiednie wnioski. Wskazano jakie orientacje i pochylenie powierzchni czołowych odbiorników energii promieniowania słonecznego są najbardziej zalecane ze względu na uzyskiwanie największych zysków energetycznych od promieniowania słonecznego.
    The paper compares the results of calculations of solar irradiation on different oriented surfaces. Meteorological data taken from several weather stations located in Warsaw, Suwałki, Gdańsk and Kolobrzeg were used for the calculations. The irradiation data for horizontal surface has been taken from website www.meteonorm.com. At first, comparable models of solar radiation were presented. It was described what types of solar radiation are included in each model. In the next step, the irradiation values for the south facing surface inclined at the 45° were compared. Calculations were made for all four locations. The differences in the results of the calculations performed with both models were mentioned. The next stage of the analysis was to determine the appropriate orientation of the area to maximizing the energy gains, over the whole year or during the summer or winter. At the end of the study, solar irradiation was calculated for surfaces oriented on four sides of the world inclined at 45º. The last chapter presents conclusions of the calculations. The most recommended orientation and inclination of front surfaces of solar receivers have been determined with regard to maximize solar gains through the year.
    Źródło:
    Czasopismo Inżynierii Lądowej, Środowiska i Architektury; 2017, 64, 4/II; 223-242
    2300-5130
    2300-8903
    Pojawia się w:
    Czasopismo Inżynierii Lądowej, Środowiska i Architektury
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Solar Energy Supply Fluctuations to Earth and Climate Effects
    Autorzy:
    Zurbenko, Igor G.
    Potrzeba-Macrina, Amy L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1065091.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Kolmogorov-Zurbenko filter
    regional climate change
    separation of scales
    spectral analysis
    sunspots numbers
    total solar irradiation
    Opis:
    A major source of energy on Earth is solar irradiation. This paper uses the Kolmogorov-Zurbenko filter to smooth and examine sunspot numbers and proves that solar irradiation levels near Earth are strictly proportional to sunspot numbers. This paper also examines the transport of that energy through the atmosphere to Earth’s surface. Long term air temperatures on the surface of Earth perfectly follow the cosine square law along latitudes. Time components of long term temperatures have oscillations which follow oscillations in sunspot numbers, but due to the regular delays in energy transmission they are delayed 4-7 years. Cloud formations and vapor accumulations also contribute to those delays, which have a well-organized time-space structure. The main purpose of this paper is the numerical identification of human influence over changes in solar activities, which may allow researchers to identify the effects of various sources of those influences. This evaluation can only be achieved by separating the scales in order to avoid any false influence from other scales. The clear separation of scales can only be achieved using the Kolmogorov-Zurbenko filter.
    Źródło:
    World Scientific News; 2019, 120, 2; 111-131
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Teoretyczne i doświadczalne napromieniowanie powierzchni kolektora słonecznego
    Theoretical and experimental irradiation of solar thermal collector surface
    Autorzy:
    Neupauer, K.
    Pater, S.
    Myszor, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2072967.pdf
    Data publikacji:
    2015
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    kolektory słoneczne
    napromieniowanie
    stała słoneczna
    solar collectors
    irradiation
    solar constant
    Opis:
    W pracy przedstawiono metodę oszacowania teoretycznej ilość energii promieniowania słonecznego, która w ciągu roku może dotrzeć do powierzchni kolektora słonecznego w instalacji solarnej. Omówiono zależność obliczonego kąta padania promieniowania słonecznego od godziny w wybranych dniach roku i szerokości geograficznej oraz jego wpływ na gęstość strumienia energii promieniowania bezpośredniego. Rozważania teoretyczne skonfrontowano z doświadczalnymi wynikami badań prowadzonych w rzeczywistej instalacji solarnej wyposażonej w płaski kolektor słoneczny na przestrzeni kilku lat.
    A method to estimate the theoretical amount of solar radiation reaching the solar collector surface in a solar heating system within one year has been presented. A dependence of calculated solar radiation angle of incidence in specified hour on selected days of the year and latitude and its impact on the energy flux density of direct radiation have been discussed. Theoretical considerations have been confronted with experimental results of research carried out in a real solar thermal system equipped with a flat solar collector working over several years.
    Źródło:
    Inżynieria i Aparatura Chemiczna; 2015, 2; 42--43
    0368-0827
    Pojawia się w:
    Inżynieria i Aparatura Chemiczna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Estimation of Solar Irradiation on Inclined Surface Based on Web Databases
    Autorzy:
    Mazurek, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/226138.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    solar radiation databases
    global tilted irradiation
    photovoltaics
    array sizing
    battery sizing
    Opis:
    Estimation of Global Tilted Irradiation (GTI) is a key to performance assessment of typical solar systems since they usually employ tilted photovoltaic (PV) modules or collectors. Numerous solar radiation databases can deliver irradiation values both on horizontal and tilted plane, however they are validated mostly with horizontal-plane ground measurements. In this paper we have compared GTI estimates retrieved from five Internet databases with results of measurements at two PV systems located in Poland. Our work shows that in spite of good agreement in annual scale, there is a tendency to underestimate GTI in summer and overestimate in winter, when PV modules can receive less than a half of expected irradiation. The latter issue affects sizing of PV system components and implies a correction needed to achieve all-year long operation.
    Źródło:
    International Journal of Electronics and Telecommunications; 2014, 60, 4; 315-320
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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