Thermal Performance Evaluation of Domed Roofs

Ahmadreza K. Faghih
Yazd University, Yazd, Iran

Mehdi N. Bahadori
Sharif University of Technology, Tehran, Iran

Ladda ner artikelhttp://dx.doi.org/10.3384/ecp110571946

Ingår i: World Renewable Energy Congress - Sweden; 8-13 May; 2011; Linköping; Sweden

Linköping Electronic Conference Proceedings 57:27, s. 1946-1953

Visa mer +

Publicerad: 2011-11-03

ISBN: 978-91-7393-070-3

ISSN: 1650-3686 (tryckt), 1650-3740 (online)


Domed roofs (DRs) have been used in Iran and many other countries to cover large buildings such as mosques; shrines; churches; schools; etc. They have been also employed in other buildings like bazaars or market places in Iran due to their favorable thermal performance. The aim of this research is to study about DRs thermal performance in order to determine how they can be helpful in reducing the maximum air temperature of inside buildings during the warm seasons considering all parameters like air flow around them; solar radiation; radiation heat transfer with the sky and the ground as well as some openings on the building. The results of the study show that the thermal performance of the investigated DR is better than the building with flat roof (FR); particularly when the dome is covered with glazed tiles. In addition to their aesthetic values; domes covered with glazed tiles have thermal benefits of keeping the inside air of these buildings relatively cool during the summer. Moreover; openings cause passive air flow inside building; which is helpful for human comfort.


Domed roof; thermal performance; air flow; solar radiation; numerical simulation; thermal network


[1] M. N. Bahadori; Passive Cooling Systems in Iranian Architecture; Scientific American; Vol. 238; 1978; pp. 144-154.

[2] A. Konya; Design Primer for Hot Climate; the Architectural Press; 1980; pp. 3-42.

[3] R. J. Mainstone; Developments in Structural Form; M.L.T. Press; 1983; pp. 95-136.

[4] V. Olgyay; Design with Climate; Princeton University Press; Princeton; 1973; p. 7.

[5] R. Tang; I. Meir; Y. Etzion; Thermal Behavior of Buildings with Curved Roofs as Compared with Flat Roofs; Solar Energy; Vol. 74; 2003; pp. 273-286. doi: 10.1016/S0038-092X(03)00193-2.

[6] A. K. Faghih; M. N. Bahadori; Three Dimensional Numerical Investigation of Air Flow over Domed Roofs; J Wind Eng Ind Aerod; Vol. 98; 2010; pp. 161-168. doi: 10.1016/j.jweia.2009.10.012.

[7] A. K. Faghih; M. N. Bahadori; Experimental Investigation of Air Flow over Domed Roofs; Iranian J of Science and Technology; Engineering; Vol. 33; 2009; pp. 207-216.

[8] A. K. Faghih; M. N. Bahadori; Solar Radiation on Domed Roofs; Energy and Buildings; Vol. 41 (B3); 2009; pp. 1238-1245. doi: 10.1016/j.enbuild.2009.07.022.

[9] M. Yazdanian; J. Klems; Measurement of the Exterior Convective Film Coefficient for Windows in Low-rise Buildings; ASHRAE Transactions 100 (1); 1994; pp. 1087–1096.

[10] A. D. Penwarden; Wise; Wind Environment around Buildings; Bldg. Res. Estab.; 1975.

[11] ASHRAE; ASHRAE Handbook-Fundamentals; American Society of Heating; Refrigerating; and Air-conditioning Engineers; Inc.; Atlanta; 1997.

[12] M. N. Bahadori; Chamberlain; Simplification of Weather Data to Evaluate Daily and Monthly Energy Needs of Residential Buildings; Sol Energy; Vol. 36; 1986; pp. 499-507. doi: 10.1016/0038-092X(86)90014-9.

[13] Berdahl; Fromberg; the Thermal Radiance of Clear Skies; Solar Energy; Vol. 29; p. 299. doi: 10.1016/0038-092X(82)90245-6.

[14] E. Ahmadi; Heat Transfer Analysis in Ground; M.S. Thesis (in Persian); School of Mechanical Engineering; Sharif University of Technology; 1999.

Citeringar i Crossref