Determining the impact of horizontal and vertical fins of office facades on visual and thermal comfort

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Determining the impact of horizontal and vertical fins of office facades on visual and thermal comfort [Megaron]

Megaron. 2022; 17(4): 644-657 | DOI: 10.14744/megaron.2022.23356

Determining the impact of horizontal and vertical fins of office facades on visual and thermal comfort

G�l�in S�t¹, Leyla Dokuzer �zt�rk²
¹Harput Architecture&Engineering, Elaz��, Türkiye
²Department of Architecture, Y�ld�z Technical University Faculty �f Architecture, �stanbul, Türkiye

A high degree of transparency is customary in modern building design, and horizontal or/and vertical fins are often employed for shading the building envelope. This study proposes a method to limit horizontal and vertical fin ranges according to current visual and thermal comfort standards. The study was carried out considering a module office room, which is assumed to be located in an office building, and one long wall is transparent. The minimum and maximum fit ranges were determined for four glazing types and seven directions the transparent wall faces (a total of 112 cases). The criteria suggested in the standard EN 17037 have been considered for visual comfort. In the first stage of providing thermal comfort, solar control was implemented to limit the fin range, that is, the annual shading need and solar gain were identified depending on the direction. Afterward, the adaptive comfort method recommended for naturally ventilated spaces in the ASHRAE 55-2017 standard was applied to evaluate the comfort conditions of the fit ranges. The detailed analysis revealed that the optimum direction regarding thermal and visual comfort is south, and the fin type in this direction is horizontal. Vertical fins in the west, east, northwest, and northeast directions provide positive outcomes. The performance of the horizontal and vertical fins is close to each other in the southwest and southeast directions. The results for the module office room can be used to take principle decisions for fit design.

Keywords: horizontal fin, solar control; thermal comfort; vertical fin; visual comfort

B�ro cephelerindeki yatay ve d��ey ��k�nt�lar�n g�rsel ve �s�sal konfor �zerindeki etkisinin belirlenmesi

G�l�in S�t¹, Leyla Dokuzer �zt�rk²
¹Harput Mimarl�k&m�hendislik, El�z��
²Y�ld�z Teknik �niversitesi, Mimarl�k Fak�ltesi, Mimarl�k B�l�m�, �stanbul

Modern bina tasar�m�nda y�ksek saydaml�k oran� olduk�a yayg�n olup yap� kabu�unda s�kl�kla
g�lgeleme ama�l� yatay ve/veya d��ey ��k�nt�lar kullan�lmaktad�r. ��k�nt�lar�n t�rl� �zellikleri hacim
i�indeki g�rsel ve �s�sal konforu etkilemektedir. Bu �al��ma g�ncel g�rsel ve �s�sal konfor
standartlar�na g�re yatay ve d��ey ��k�nt� aral�klar�n�n s�n�rland�r�lmas�na y�nelik bir y�ntem
�nermi�tir. �klim tabanl� verilerle g�rsel ve �s�sal konfor �l��tlerinin analizleri yap�larak uygun ��k�nt�
aral�klar� belirlenmi�tir. �al��ma bir ofis binas�nda konumland�� varsay�lan ve bir uzun kenar� saydam
olan mod�l ofis hacmi i�in yap�lm��t�r. Saydam duvar�n g�ney, bat�, do�u, g�neybat�, g�neydo�u,
kuzeybat� ve kuzeydo�u olmak �zere yedi y�ne bakt�� durum, d�rt farkl� cam tipi, yatay ve d��ey
��k�nt� i�in minimum ve maksimum ��k�nt� aral�� belirlenmi�tir (toplam 112 durum). G�rsel konfor ile
ilgili EN 17037 standard�ndaki g�n�� ayd�nl�k d�zeyi, kama�madan korunma, g�ne�lenme ve d��
ortamla g�rsel ba�lant� �l��tleri dikkate al�nm��t�r. Is�sal konforun sa�lanmas�nda ilk a�amada ��k�nt�
aral�klar�n� s�n�rland�rmak �zere g�ne� denetimi yap�lm��t�r, yani y�ne g�re y�ll�k g�lgeleme ihtiyac� ve
g�ne� kazanc� belirlenmi� ve s�n�rland�r�lm��t�r. Ard�ndan ��k�nt� aral�klar�n�n konfor ko�ullar�n�
de�erlendirmek �zere ASHRAE 55-2017 standard�nda do�al havaland�r�lan mekanlar i�in �nerilen
adaptive comfort y�ntemi uyar�nca i�lem yap�lm��t�r. �ok y�nl� analizler sonucunda �s�sal ve g�rsel
konfor a��s�ndan optimum sonucun g�ney, bu y�ndeki ��k�nt� t�r�n�n yatay oldu�u g�r�lm��t�r. Bat�,
do�u, kuzeybat� ve kuzeydo�u y�nlerinde d��ey ��k�nt�lar olumlu sonu� vermektedir. G�neybat� ve
g�neydo�u y�nlerinde ise yatay ve d��ey ��k�nt�lar�n performans� birbirine yak�n olmaktad�r. Bu
�al��mada �nerilen y�ntem uyar�nca �s�sal ve g�rsel konfor ko�ullar�n� sa�layacak ��k�nt� aral�klar�
saptanabilir. Mod�l ofis hacmine ili�kin sonu�lardan ��k�nt� tasar�m�na y�nelik temel ilke kararlar�n�n
al�nmas�nda yararlan�labilir.

Anahtar Kelimeler: G�rsel konfor, �s�sal konfor, g�ne� denetimi, yatay ��k�nt�, d��ey ��k�nt�

G�l�in S�t, Leyla Dokuzer �zt�rk. Determining the impact of horizontal and vertical fins of office facades on visual and thermal comfort. Megaron. 2022; 17(4): 644-657

Corresponding Author: G�l�in S�t, T�rkiye

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