Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Ewa Radziemska"'
Autor:
Ewa Radziemska
Publikováno v:
International Journal of Photoenergy, Vol 2009 (2009)
The present commercial photovoltaic solar cells (PV) converts solar energy into electricity with a relatively low efficiency, less than 20%. More than 80% of the absorbed solar energy is dumped to the surroundings again after photovoltaic conversion.
Externí odkaz:
https://doaj.org/article/105e71fad1b1496985f1a8858b4de14e
Autor:
Witold M. Lewandowski, Ewa Radziemska
Publikováno v:
Experimental Thermal and Fluid Science. 32:1034-1038
The paper presents results of experimental investigations of the convective heat transfer from isothermal cuboid with relatively big dimensions (i.e. 1.5 m × 1 m × 0.5 m). The aim of this research was to obtain results, which could be comparable to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f80974cbea7a1f853fa7e6ee1effe0f9
https://doi.org/10.1016/j.expthermflusci.2007.11.001
https://doi.org/10.1016/j.expthermflusci.2007.11.001
Autor:
Ewa Radziemska, Witold M. Lewandowski
Publikováno v:
Journal of Thermophysics and Heat Transfer. 21:813-816
EAT transfer from circular disk geometry is very important inmanyapplications.Therehasbeensomeexperimentalresearchdevoted to natural convection heat transfer from stationary circulardisks and plates. For a horizontal plate, Kadambi and Drake [1]propo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8dba018118128f3007eb5ec78c989c9b
https://doi.org/10.2514/1.29027
https://doi.org/10.2514/1.29027
Autor:
Ewa Radziemska
Publikováno v:
International Journal of Energy Research. 30:127-134
The influence of temperature on the dark forward current–voltage characteristics of a single crystalline silicon solar cell and a small silicon diode within the range from 295–373 K has been analysed. It was shown that the forward voltage of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6c848ac5c09362b67c4bc9d344fedebf
https://doi.org/10.1002/er.1113
https://doi.org/10.1002/er.1113
Autor:
Ewa Radziemska
Publikováno v:
Energy Conversion and Management. 46:1485-1494
The effect of parasitic resistances on silicon solar cell performance was discussed. The current–voltage I – U characteristics of single crystalline silicon solar cells at different temperatures were measured in the dark. A one and two diodes equ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a3d816d60b38301b2279cbcc9cdb4c38
https://doi.org/10.1016/j.enconman.2004.08.004
https://doi.org/10.1016/j.enconman.2004.08.004
Autor:
Ewa Radziemska, Witold M. Lewandowski
Publikováno v:
Heat Transfer Engineering. 26:042-050
Results are presented for the experimental investigations of free convection heat transfer from upward facing isothermal horizontal rectangular plates as a function of the plate width. Two models of the convective fluid flow structures above horizont
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ef642980dfabbece21f5ce05037cacfa
https://doi.org/10.1080/01457630590916275
https://doi.org/10.1080/01457630590916275
Autor:
Witold M. Lewandowski, Ewa Radziemska
Publikováno v:
Heat Transfer Engineering. 26:50-53
Natural convective heat transfer from flat horizontal isothermal plates has been investigated for more than a century. In the present study, the influence of the size of the plate on the heat flux is investigated. Two ranges of the heat transfer inte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de6437175ad121f0221c9c596ea1537a
https://doi.org/10.1080/01457630590897178
https://doi.org/10.1080/01457630590897178
Autor:
Ewa Radziemska, Witold M. Lewandowski
Publikováno v:
International Journal of Heat and Mass Transfer. 46:2169-2178
The paper presents results of theoretical and experimental investigations of the convective heat transfer from isothermal cuboid. The analytical solution was performed taking into account complete boundary layer length and the manner of its propagati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c74c4a8aec93a6c041e960b49bb47f99
https://doi.org/10.1016/s0017-9310(02)00533-1
https://doi.org/10.1016/s0017-9310(02)00533-1
Autor:
Ewa Radziemska
Publikováno v:
Progress in Energy and Combustion Science. 29:407-424
This review summarizes the recent progress obtained in the field of the temperature performance of crystalline and amorphous silicon solar cells and modules. It gives a general analysis of results and reviews of applications for building integrated p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::183294b187a29523661e54e9f470a0b6
https://doi.org/10.1016/s0360-1285(03)00032-7
https://doi.org/10.1016/s0360-1285(03)00032-7
Publikováno v:
Applied Energy. 73:261-275
A simplified analytical solution, numerical calculations with the use of the FLUENT/UNS code and experimental studies of laminar free-convection heat transfer from an isothermal hemispherical cavity in unlimited space are presented. The analytical so
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8b106983f7b7a634fc6829189c7160e1
https://doi.org/10.1016/s0306-2619(02)00079-x
https://doi.org/10.1016/s0306-2619(02)00079-x