Detail publikačního výsledku

Solar Absorber with a Structured Surface – a Way to Increase Efficiency

MRŇA, L.; ŘIHÁČEK, J.; HORNÍK, P.; ŠARBORT, M.

Originální název

Solar Absorber with a Structured Surface – a Way to Increase Efficiency

Anglický název

Solar Absorber with a Structured Surface – a Way to Increase Efficiency

Druh

Článek WoS

Originální abstrakt

The basic idea of solar absorber thermal gain increase is the keyhole effect utilization during which the radiation is absorbed by multiple reflections on cavity walls. The lattice of pyramidal or conical cavities on the solar absorber surface can be formed to create structured surface leading to its overall absorptivity increase and to the reduction of surface absorptivity dependence on the solar radiation incident beam angle changes caused by the daily and annual solar cycles. This contribution concludes the results of simulations of the effect of cavity geometry, geographical position and absorber orientation on its thermal gain with respect to the technological manufacturability of cavities. Furthermore, the real construction of the absorber with structured surface using laser welding and parallel hydroforming is briefly described.

Anglický abstrakt

The basic idea of solar absorber thermal gain increase is the keyhole effect utilization during which the radiation is absorbed by multiple reflections on cavity walls. The lattice of pyramidal or conical cavities on the solar absorber surface can be formed to create structured surface leading to its overall absorptivity increase and to the reduction of surface absorptivity dependence on the solar radiation incident beam angle changes caused by the daily and annual solar cycles. This contribution concludes the results of simulations of the effect of cavity geometry, geographical position and absorber orientation on its thermal gain with respect to the technological manufacturability of cavities. Furthermore, the real construction of the absorber with structured surface using laser welding and parallel hydroforming is briefly described.

Klíčová slova

solar absorber, hydroforming, multiple reflections, absorption efficiency, LS-DYNA

Klíčová slova v angličtině

solar absorber, hydroforming, multiple reflections, absorption efficiency, LS-DYNA

Autoři

MRŇA, L.; ŘIHÁČEK, J.; HORNÍK, P.; ŠARBORT, M.

Rok RIV

2019

Vydáno

30.04.2019

Nakladatel

Czech Technical University in Prague

Místo

Praha

ISSN

1805-2363

Periodikum

Acta Polytechnica

Svazek

59

Číslo

2

Stát

Česká republika

Strany od

134

Strany do

143

Strany počet

10

URL

https://ojs.cvut.cz/ojs/index.php/ap/article/view/5191

BibTex

@article{BUT156763,
  author="MRŇA, L. and ŘIHÁČEK, J. and HORNÍK, P. and ŠARBORT, M.",
  title="Solar Absorber with a Structured Surface – a Way to Increase Efficiency",
  journal="Acta Polytechnica",
  year="2019",
  volume="59",
  number="2",
  pages="134--143",
  doi="10.14311/AP.2019.59.0134",
  issn="1210-2709",
  url="https://ojs.cvut.cz/ojs/index.php/ap/article/view/5191"
}