Efficient Solar Heat Absorption and Counter Passive Air Cooling Using Supersonically Sprayed rGO/AgNW Nanotextured Surface for Solar Devices

Kwangjin Jang, Chanwoo Park, Taegun Kim, Ali Aldalbahi, Mohamed El-Newehy, Boo Hyoung Bang, Sam S. Yoon

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Solar energy devices such as solar photovoltaic (PV) panels and solar air heaters (SAHs) suffer from reduced efficiency, thermal stress, and permanent damage when they overheat. Cooling such devices while simultaneously maintaining the maximum absorption of solar light waves remains a significant challenge. A copper substrate was coated with graphene oxide (rGO) and silver nanowires (AgNWs) to augment radiative heat absorption on one side and convective cooling on the other side. The rGO/AgNW surface on both sides enhanced both solar heat wave absorption via the textured surface, as in a blackbody in a cavity, and convective cooling via the increased total surface area. For natural convection, fresh cooling air was supplied via buoyancy. For duct flow in a confined channel, the inner surface of the duct was coated with rGO/AgNW to promote convective cooling. This arrangement simulated actual air cooling of a solar PV panel or SAH. The incoming air into the duct was heated by the high temperature wall. In return, the wall temperature of the duct cooled, which in turn prevented overheating and provided long-term stability for the solar PV panel or SAH. Furthermore, the removed heat can be used to power thermoelectric devices or for domestic and industrial applications.

Original languageEnglish
Pages (from-to)1529-1541
Number of pages13
JournalInternational Journal of Precision Engineering and Manufacturing - Green Technology
Volume10
Issue number6
DOIs
Publication statusPublished - 2023 Nov

Bibliographical note

Publisher Copyright:
© 2023, The Author(s), under exclusive licence to Korean Society for Precision Engineering.

Keywords

  • Radiative heat transfer
  • Reduced graphene oxide
  • Silver nanowires
  • Solar air heater
  • Supersonic spraying

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • General Materials Science
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Management of Technology and Innovation

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