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Wyszukujesz frazę "diffused radiation" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Numerical procedures and their practical application in PV module analyses. Part 3, Parameters of atmospheric transparency : determining and correlations
Autorzy:
Rodziewicz, T.
Rajfur, M.
Powiązania:
https://bibliotekanauki.pl/articles/1818226.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Tematy:
solar radiation spectrum
sky clearness index
diffused component content index
solar energy
photovoltaics
Opis:
The presented article examines aspects of a PV module testing using natural sunlight in outdoor conditions. The article discusses the physical sense of indexes: atmosphere purity, diffused component content, beam clear sky index. Procedures for their determination are given in relation to both instantaneous and daily values. Their close connection with the values of solar irradiance spectral distribution such as Average Photon Energy and Useful Fraction is demonstrated, as well as their usefulness in module testing in outdoor conditions. Their influence on the conversion of modules made from various absorbers and various technologies is demonstrated.
Źródło:
Opto-Electronics Review; 2020, 28, 1; 15--34
1230-3402
Pojawia się w:
Opto-Electronics Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preliminary assessment of a flat roof radiation on radiative heat gains of nearby windows - a case study
Autorzy:
Kaczmarzyk, Marcin
Musiał, Michał
Piątkowski, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/104948.pdf
Data publikacji:
2019
Wydawca:
Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
Tematy:
thermal radiation
flat roof
view-factor
diffused radiation
radiative heat flux
promieniowanie cieplne
promieniowanie rozproszone
dach płaski
Opis:
This paper presents the results of preliminary assessment of radiative heat flux received by selected windows from tar paper coated flat roof of the adjacent building. This study was conducted on an actual object: building “P” at the University of Technology in Rzeszow. Windows located on south-western elevation of “P” building are subjected to thermal and diffused solar radiation, coming from a flat roof of a nearby gym. It was suspected, that this extra heat flux may have significant influence on compartment overheating, that is observed by occupants of “P” building. For the purpose of this study, various atmospheric data, such as temperatures, solar irradiance and wind speed were collected on site. In order to gain more detailed insight into investigated problem, Finite Elements model of occurring phenomenon was developed. FE modelling along with calculations of necessary view factors were performed in Matlab 2019a. Our study demonstrated, that analysed windows receive twice the heat gains from the flat roof, that they would have received from grass covered ground surface in absence of the gym. It has been concluded, that the proximity of the flat roof with bituminous cover considerably influences radiative heat gains of the windows, especially these located at lower floors and the phenomenon seriously contributes to overheating of the compartments in studied building.
Źródło:
Czasopismo Inżynierii Lądowej, Środowiska i Architektury; 2019, 66, 2; 13-20
2300-5130
2300-8903
Pojawia się w:
Czasopismo Inżynierii Lądowej, Środowiska i Architektury
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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