Araştırma Makalesi

COOLING LOAD REDUCTION WITH TRANSPIRED SOLAR COLLECTORS

Cilt: 23 Sayı: 1 30 Haziran 2022
Balazs Bokor , Hacer Akhan *, Doğan Eryener , László Kajtár
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COOLING LOAD REDUCTION WITH TRANSPIRED SOLAR COLLECTORS

Öz

When considering energy reduction issues of the building sector, one cannot overlook the importance of cooling load reduction. Depending on a country’s primary energy conversion factor, producing one unit of cooling energy with a chiller can require three times as much primary energy, than producing one unit of heating energy with a boiler. A remarkable amount of the cooling load of a building reaches the interior through the roof, as roofs can be as hot as 70 °C under strong solar radiation. Roof ventilation with double-layer structures offers a reliable temperature reduction between the solar exposed upper layer and the lower one, which is the actual building roof. The transpired solar collector (TSC) is a proven technology for solar air heating with numerous installed and successfully operated systems around the world. This paper reflects on its passive cooling potential, when the perforated metal plate absorber is installed on a building’s roof. At night, the perforated plate acts as a radiating shield, which loses heat towards the cold sky. Thus, after the perforated plate has cooled below ambient temperature, outdoor air can be cooled, which is later used for nocturnal ventilation of the building. However, the predicted cooling energy during an analysis of the radiant cooling strongly depends on the sky temperature model chosen. Different models of sky temperature are compered in their result on the longwave radiant heat flux towards the sky. The comparison is carried out for four cities with different climate. Results reflect on a novel application of the transpired solar collector, which therefore can be used for the reduction of building energy consumption over the entire year.

Anahtar Kelimeler

Transpired solar collector , Roof ventilation , Nocturnal radiation , Passive cooling , Solar cooling load reduction

Kaynakça

  1. Referans 1 Al-Obaidi KM, Ismail M, Abdul Rahman AM, (2014), Design and performance of a novel innovative roofing system for tropical landed houses. Energy Conversion and Management, 85 pp. 488-504.
  2. Referans 2 Artmann N, Manz H, Heiselberg P, (2007), Climatic Potential for Passive Cooling of Buildings by Night-time Ventilation in Europe. Applied Energy, 84 187-201
  3. Referans 3 Artmann N, Manz H, Heiselberg P, (2008), Parameter Study on Performance of Building Cooling by Night-time Ventilation. Renewable Energy, 33 2589-2598
  4. Referans 4 Berdahl P, Fromberg R, (1982), The thermal radiance of clear skies. Solar Energy, 29 299-314.
  5. Referans 5 Berger X, Buriot D, Garnier F, (1984), About the equivalent radiative temperature for clear skies, DOI:10.1016/0038-092X(84)90247-0
  6. Referans 6 Bliss RA, (1961), Atmospheric radiation near the surface of the ground. Solar Energy, 5 103.
  7. Referans 7 P., Spérandio M., Allard F., (1997), Night Ventilation for Building Cooling in Summer. Solar Energy Vol. 61. No. 5. pp. 327-335.
  8. Referans 8 Bokor B, Akhan H, Eryener D, Kajtár L., (2017), Theoretical and experimental analysis on the passive cooling effect of transpired solar collectors. Energy and Buildings 156 pp. 109-120.
  9. Referans 9 Ciampi M., Leccese F., Tuoni G., (2005), Energy analysis of ventilated and microventilated roofs. Solar Energy, 79 pp 183-192.
  10. Referans 10 Clark G, (1981), Passive/Hybrid comfort cooling by thermal radiation. Passive/Hybrid Cooling Conference, Miami.

Ayrıntılar

Birincil Dil

İngilizce

Konular

Mühendislik

Bölüm

Araştırma Makalesi

Yazarlar

László Kajtár Bu kişi benim
0000-0002-7180-4458
Hungary

Yayımlanma Tarihi

30 Haziran 2022

Gönderilme Tarihi

22 Aralık 2021

Kabul Tarihi

17 Mart 2022

Yayımlandığı Sayı

Yıl 2022 Cilt: 23 Sayı: 1

IZ

https://izlik.org/JA84KA94UN

Kaynak Göster

RIS / Bibtex
IEEE
[1]B. Bokor, H. Akhan, D. Eryener, ve L. Kajtár, “COOLING LOAD REDUCTION WITH TRANSPIRED SOLAR COLLECTORS”, TUJES, c. 23, sy 1, ss. 1–10, Haz. 2022, [çevrimiçi]. Erişim adresi: https://izlik.org/JA84KA94UN