Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Hwi-Ung Choi"'
Publikováno v:
Energies, Vol 17, Iss 13, p 3231 (2024)
Indirect evaporative coolers (IECs) use the latent heat of water evaporation to cool air. This system has the advantage of operating at low power without a compressor and does not increase the absolute humidity of the air. However, an IEC is difficul
Externí odkaz:
https://doaj.org/article/b5ffb9b60a9a49fb84d9318db3d751f9
Publikováno v:
Energies, Vol 17, Iss 12, p 3038 (2024)
In this study, we proposed and experimentally investigated a novel solar-assisted heat pump (SAHP) system integrated with a dual-purpose solar collector (DPSC). The DPSC is a solar collector designed to produce both heated air and hot water, and the
Externí odkaz:
https://doaj.org/article/93c977848fd444619722388d22be1a6c
Publikováno v:
Energies, Vol 17, Iss 11, p 2752 (2024)
An air-based photovoltaic thermal collector (PVTC) is a system that generates both electricity and heat using air flowing over a photovoltaic (PV) module. This system offers the advantage of easy maintenance; however, it suffers from lower thermal ef
Externí odkaz:
https://doaj.org/article/7b791dc43acc4091a3d7dc618692309d
Publikováno v:
Energies, Vol 16, Iss 19, p 6891 (2023)
In this study, the heat transfer augmentation and friction factor of a novel type of solar air heater (SAH), which incorporates longitudinal fins and rectangular turbulators, were investigated numerically with different arrangements of the turbulator
Externí odkaz:
https://doaj.org/article/1b39a1946e344b518c81155a0b691f3c
Autor:
Hwi-Ung Choi, Kwang-Hwan Choi
Publikováno v:
Energies, Vol 15, Iss 11, p 4150 (2022)
This study experimentally investigated the performance of a PVT air collector coupled with a triangular block. The triangular block, newly suggested by the authors, is a triangular-shaped obstacle and was inserted at the bottom of the PVT air collect
Externí odkaz:
https://doaj.org/article/82020098a612434f9983b09e5e0eff83
Autor:
Hwi-Ung Choi, Kwang-Hwan Choi
Publikováno v:
Energies, Vol 13, Iss 9, p 2203 (2020)
In the present work, the electrical and thermal performances of a newly designed PV/T (photovoltaic/thermal) air collector, which was proposed and fabricated by the author, have been investigated experimentally in the natural weather conditions. The
Externí odkaz:
https://doaj.org/article/d3e3cff1378043acbb04bf29d9371835
Autor:
Hwi-Ung Choi, Kwang-Hwan Choi
Publikováno v:
Energies, Vol 13, Iss 5, p 1099 (2020)
In this study, a two-dimensional CFD (computational fluid dynamics) analysis was performed to investigate the heat-transfer and fluid-friction characteristics in a solar air heater having a transverse triangular block at the bottom of the air duct. T
Externí odkaz:
https://doaj.org/article/960b15f1fdef4e96b75cb424b26460bd
Publikováno v:
Journal of the Korean Solar Energy Society. 42:15-27
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::034411721f1594bfd393f6370f770541
https://doi.org/10.7836/kses.2022.42.6.015
https://doi.org/10.7836/kses.2022.42.6.015
Publikováno v:
Journal of the Korean Solar Energy Society. 42:33-46
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8cfba497136987edcc370ba020f2796a
https://doi.org/10.7836/kses.2022.42.4.033
https://doi.org/10.7836/kses.2022.42.4.033
Publikováno v:
Sustainability; Volume 15; Issue 6; Pages: 5382
This study discussed the effect of ribbed fin, which was suggested by the authors, on the enhancement of heat transfer and flow characteristics of fluid in a solar air heater. The ribbed fin has a rectangular rib at the base and side surfaces of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::53ff8efae3177e785a480070188c2326