Effects of built-in balcony on thermal performance in residential buildings: A case study

Namlı L.

JOURNAL OF BUILDING PHYSICS, cilt.40, sa.2, ss.125-143, 2016 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 40 Sayı: 2
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1177/1744259115624179
  • Dergi Adı: JOURNAL OF BUILDING PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.125-143
  • Anahtar Kelimeler: Thermal performance in buildings, balcony, open-ended structure, extended boundaries, laminar natural convection in enclosure, BUOYANCY-DRIVEN FLOWS, LAMINAR NATURAL-CONVECTION, TRIANGULAR CROSS-SECTION, DAY BOUNDARY-CONDITIONS, OPEN-ENDED ENCLOSURES, LOW-RISE BUILDINGS, HEAT-TRANSFER, OPEN CAVITIES, ROOF
  • Ondokuz Mayıs Üniversitesi Adresli: Evet

Özet

In this study, effects of built-in balcony on thermal performance in residential buildings were investigated numerically by means of open-ended structure approach. For this purpose, the parametric study has been carried out for various ratios of balcony depth/balcony height (L/H), closed barrier height/balcony height (h/H) and Rayleigh numbers (Ra) using a computer program in case of no wind for laminar flow. Analyses were conducted for Rayleigh numbers ranging from 10(3) to 10(6). The calculations were carried out for the ratios of L/H, namely, 0.0, 0.24 and 0.6, and the ratios of h/H, namely, 0.0, 0.18 and 0.35. The working fluid was assumed to be air (Pr=0.71). According to the findings, for Ra10(4), Nusselt number (Nu) decreases with the increasing ratio of L/H for the constant h/H=0.35. However, for Ra10(5), Nu sharply decreases with the increasing ratio of L/H, while Nu again sharply increases after L/H0.25 and almost remains constant after L/H0.5. For the constant L/H=0.54, Nu decreases with the increasing ratio of h/H for the whole Ra. It is suggested that the ratio of L/H should not be over 0.35 and the ratio of h/H should be at least 0.35.