Study of non-stationary heat losses in flat-plate solar collectors

Кличев, Ш.И., Бахрамов, С.А., Кенжаев, И.Г., Турсунбаев, Ж.Ж., Маразаков, Ш.А.

O‘zbekiston fizika jurnali · 2023-yil

Annotatsiya

Daytime heat losses and coolant temperatures at the outlet of flat-plate solar collectors (SC) are studied taking into account the variability of the density of incident solar radiation on the SC. The studies were carried out on the basis of the developed one-dimensional three-layer distributed non-stationary thermal model of a flat single-channel SC with a non-selective receiver, which takes into account temperature changes along the length of the SC. It is shown that the main heat losses in the SC in summer are up to 78% by radiation from the transparent enclosure (TE), and from the thermal insulation of the bottom 15%, convective heat loss is about 7%, of which about 5.5% in the TE and 1.5% in the insulation. These indicators and the temperature of the coolant at the outlet of the SC have variable values during the day, which must be taken into account when applying the efficiency factor of the SC. It is shown that the improvement of the thermal characteristics of the TE, first of all, depends on the possibility of electromagnetic radiation from the TE. Reducing the heat losses of the SC by increasing the thickness of the thermal insulation is limited due to small thermal effects.

Maqola ma’lumotlari
MualliflarКличев, Ш.И., Бахрамов, С.А., Кенжаев, И.Г., Турсунбаев, Ж.Ж., Маразаков, Ш.А.
JurnalO‘zbekiston fizika jurnali
NashriyotЎзбекистон Республикаси Фанлар академияси
ISSN1025-8817, 2181-077X
Nashr sanasi2023-10-07
Jild25
Son3
TilIngliz
Ilmiy sohaFizika-matematika
DOI10.52304/.v25i3.445
Indeksga qo‘shilgan2026-08-26

DOI: 10.52304/.v25i3.445 · Maqolaning asl sahifasi

Kalit so‘zlar

солнечное излучение, нестационарный радиационный и конвективный теплообмен, метод конечных разностей, граничные условия, solar radiation, nonstationary radiative and convective heat transfer, finite difference method, boundary conditions

Ilmiy soha

Fizika-matematika

Iqtibos keltirish

APAКличев, Ш.И., Бахрамов, С.А., Кенжаев, И.Г., Турсунбаев, Ж.Ж., & Маразаков, Ш.А. (2023). Study of non-stationary heat losses in flat-plate solar collectors. O‘zbekiston fizika jurnali, 25(3). https://doi.org/10.52304/.v25i3.445
GOST (OAK)Кличев, Ш.И. va b. Study of non-stationary heat losses in flat-plate solar collectors // O‘zbekiston fizika jurnali. – 2023. – T. 25, № 3. – DOI: 10.52304/.v25i3.445.
MLAКличев, Ш.И., Бахрамов, С.А., Кенжаев, И.Г., Турсунбаев, Ж.Ж., and Маразаков, Ш.А. “Study of non-stationary heat losses in flat-plate solar collectors.” O‘zbekiston fizika jurnali, 25(3), 2023. https://doi.org/10.52304/.v25i3.445
ChicagoКличев, Ш.И., Бахрамов, С.А., Кенжаев, И.Г., Турсунбаев, Ж.Ж., and Маразаков, Ш.А. “Study of non-stationary heat losses in flat-plate solar collectors.” O‘zbekiston fizika jurnali, 25(3) (2023). https://doi.org/10.52304/.v25i3.445
HarvardКличев, Ш.И., Бахрамов, С.А., Кенжаев, И.Г., Турсунбаев, Ж.Ж., and Маразаков, Ш.А (2023) ‘Study of non-stationary heat losses in flat-plate solar collectors’, O‘zbekiston fizika jurnali, 25(3). https://doi.org/10.52304/.v25i3.445
BibTeX
@article{article2023,
  title = {Study of non-stationary heat losses in flat-plate solar collectors},
  author = {Кличев, Ш.И. and Бахрамов, С.А. and Кенжаев, И.Г. and Турсунбаев, Ж.Ж. and Маразаков, Ш.А.},
  journal = {O‘zbekiston fizika jurnali},
  year = {2023},
  volume = {25},
  number = {3},
  doi = {10.52304/.v25i3.445},
  url = {https://doi.org/10.52304/.v25i3.445}
}

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