Detail publikace

Convective heat transfer inside planar solar collectors

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

FICKER, T.

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

1

Strany do

5

Strany počet

5

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"
}