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FICKER, T.
Originální název
Convective heat transfer inside planar solar collectors
Typ
článek ve sborníku ve WoS nebo Scopus
Jazyk
angličtina
Originální abstrakt
There is a permanent interest in improving the construction and thermal properties of the planar solar collectors. Minimizing the heat losses of the collectors and improving their energy gains are some of the relevant research goals. Convective heat transfer inside the cavity of planar collectors has been determined theoretically and numerically in this conference contribution. The convective heat transfer is computed on the basis of physical relations using the correlation relations of Nusselt’s number. The Nusselt number has been expressed by means of Rayleigh`s and Prandtl’s numbers. The convective heat transfer inside the cavities of planar solar collectors represents essential part of heat losses that lower the effectiveness of these collectors. In this conference contribution the convective heat losses have been compared with the standard density of heat flow coming from the Sun and the corresponding energy ratio has been determined. It has been shown that this ratio amounts almost 10 %. A typical summer environment has been supposed with a standard sunshine reaching 1000 Wm-2. The common type of the planar solar collector with geometrical dimensions 2m x 1m x 0.05m and cavity filled by air has been investigated. The temperature of the absorber has been supposed to be 70 °C whereas the temperature of the glass plate placed on the top side of the collector has been assumed to be 35 °C.
Klíčová slova
Solar collector; convective heat transfer; Nusselt number; correlation function; heat loss.
Autoři
Vydáno
9. 12. 2020
Nakladatel
IOP Publishing
Místo
London
ISSN
1757-8981
Periodikum
IOP Conference Series: Materials Science and Engineering
Ročník
960
Číslo
1
Stát
Spojené království Velké Británie a Severního Irska
Strany od
Strany do
5
Strany počet
URL
https://iopscience.iop.org/article/10.1088/1757-899X/960/2/022020
Plný text v Digitální knihovně
http://hdl.handle.net/11012/196540
BibTex
@inproceedings{BUT169532, author="Tomáš {Ficker}", title="Convective heat transfer inside planar solar collectors", booktitle="5th World Multidisciplinary Civil Engineering-Architecture-Urban Planning Symposium, WMCAUS 2020", year="2020", journal="IOP Conference Series: Materials Science and Engineering", volume="960", number="1", pages="1--5", publisher="IOP Publishing", address="London", doi="10.1088/1757-899X/960/2/022020", issn="1757-8981", url="https://iopscience.iop.org/article/10.1088/1757-899X/960/2/022020" }