Pamukkale Univ Muh Bilim Derg. Ahead of Print: PAJES-51813 | DOI: 10.5505/pajes.2023.51813

Numerical investigation of wind resistance and heat island formation in buildings of different configurations

Ömer Faruk Can
Department of Mechanical Engineering, Dicle University, 21280, Diyarbakir, Turkey

As a result of increasing population density, problems in residential areas have emerged in cities in recent years. With the development of technology, engineers have turned to the construction of taller buildings to meet the increasing demand. As a result, heat island formation becomes inevitable if there is not enough distance between buildings. In this study, it is aimed to numerically investigate the heat island formation and wind effects in buildings. The Ansys Cfx software program was used for the modeling process. Six different building configurations were analyzed to investigate heat island formation. Building heights and inter-building distances were varied for different aspect ratios. As a result of the study, more heat islands formed when the distance between buildings was smaller. As a result of the study, more heat island formation was observed in the first four cases (C1--C4). C5 and C6 were found to be the most suitable building sequences. drag coefficients (Cd) were obtained in the range of 1.35 to 1.65 for different building sequences. As a result of the cooling effects of the wind on the building, a decrease of 2 to 5 degrees in the average temperature of the building was observed. The average heat transfer coefficient is (68 W/mK) when only concrete is used in buildings. The best insulation was realized when glass wool was used.

Keywords: Heat island, numerical modeling, wind effect, urban planning, insulation material

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Farklý konfý̇gürasyonlardaký̇ bý̇nalarda rüzgar dý̇rencý̇ ve ýsý adasý oluþumunun sayýsal ý̇ncelenmesý̇

Ömer Faruk Can
Dicle Üniversitesi Mühendislik Fakültesi, Makine Mühendisliði Enerji Anabilim Dalý, Diyarbakýr

Artan nüfus yoðunluðunun bir sonucu olarak, son yýllarda þehirlerde yerleþim alanlarýnda sorunlar ortaya çýkmýþtýr. Teknolojinin geliþmesiyle birlikte mühendisler artan talebi karþýlamak için daha yüksek binalarýn yapýmýna yönelmiþlerdir. Sonuç olarak, binalar arasýnda yeterli mesafe olmadýðý takdirde ýsý adasý oluþumu kaçýnýlmaz hale gelmektedir. Bu çalýþmada binalarda ýsý adasý oluþumu ve rüzgar etkilerinin sayýsal olarak incelenmesi amaçlanmýþtýr. Modelleme iþlemi için Ansys Cfx yazýlým programý kullanýlmýþtýr. Isý adasý oluþumunu incelemek için altý farklý bina konfigürasyonu analiz edilmiþtir. Bina yükseklikleri ve binalar arasý mesafeler farklý en-boy oranlarý için deðiþtirilmiþtir. Çalýþma sonucunda, binalar arasýndaki mesafe azaldýkça daha fazla ýsý adasý oluþtuðu görülmüþtür. Çalýþma sonucunda ilk dört durumda daha fazla ýsý adasý oluþumu gözlenmiþtir(C1—C4). En uygun bina diziliminin C5 ve C6 olduðu görülmüþtür. Sürüklenme katsayýlarý (Cd) farklý bina dizilimleri için 1.35 ile 1.65 aralýðýnda elde edilmiþtir. Rüzgarýn bina üzerindeki soðutma etkileri sonucunda binanýn ortalama sýcaklýðýnda 2 ila 5 derecelik bir düþüþ gözlemlenmiþtir. Binalarda sadece beton kullanýldýðýnda ortalama ýsý transfer katsayýsý (68 W/mK) olmaktadýr. En iyi yalýtým cam yünü kullanýldýðýnda gerçekleþmiþtir

Anahtar Kelimeler: Isý adasý, sayýsal modelleme, rüzgar etkisi, kentsel planlama, yalýtým malzemesi

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