Conference article

Feasibility Study on Using Solar Chimney and Earth-to-Air Heat Exchanger for Natural Heating of Buildings

Amin Haghighi Poshtiri
Guilan University, Rasht, Iran

Neda Gilani
Tarbiat modares University, Tehran, Iran

Farshad Zamiri
Sharif university of technology, Tehran, Iran

Download articlehttp://dx.doi.org/10.3384/ecp110571773

Published in: World Renewable Energy Congress - Sweden; 8-13 May; 2011; Linköping; Sweden

Linköping Electronic Conference Proceedings 57:5, p. 1773-1780

Show more +

Published: 2011-11-03

ISBN: 978-91-7393-070-3

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

Abstract

Here; the capability of the SC-EAHE system to meet the required thermal needs of individuals and also the dependence of the system performance on environmental and geometrical issues; have been studied. To determine the heat transfer characteristics of the system; a mathematical model based on energy conservation equations has been developed and solved by an iterative method. The results of study for the effect of air gap size variation on the air change per hour (ACH) at various solar radiation values shows that this effect (air gap depth on the ACH) is significant up to 0.2 (m); and the ACH and room air temperature remains almost constant beyond the 0.2 (m). The results also revealed that the design of EAHE with the diameter of 0.5 (m) would lead to the best performance. It is found that; with proper insulation; SC system can provide thermal comfort condition even at the ambient temperature as low as 5 oC and the solar radiation intensity of 185 (w/m2).

Keywords

Solar chimney; Earth-to-air heat exchanger; Natural heating; Building

References

[1] P. Hollmuller; Analytical characterization of amplitude-dampening and phase shifting in air/soil heat exchangers. International Journal of Heat and Mass Transfer 46; 2003; pp.4303-4317. doi: 10.1016/S0017-9310(03)00199-6.

[2] F. Al-Ajmi; DL. Loveday; VI. Hanby; The cooling potential of earth-air heat exchangers for domestic buildings in a desert climate; Building and Environment 41; 2006; pp. 235-244. doi: 10.1016/j.buildenv.2005.01.027.

[3] NK. Bansal; R. Mathur; MS. Bhandari; A study of solar chimney assisted wind tower system for natural ventilation in buildings; Building and Environment 29(4); 1994; pp. 495-500. doi: 10.1016/0360-1323(94)90008-6.

[4] G. Gan; SB. Riffat; A numerical study of solar chimney for natural ventilation of buildings with heat recovery; Applied Thermal Engineering 18; 1998; pp. 117-187. doi: 10.1016/S1359-4311(97)00117-8.

[5] J. Mathur; S. Mathur; Anupma; Summer-performance of inclined roof solar chimney for natural ventilation; Energy and Buildings 38; 2006; pp. 1156-1163. doi: 10.1016/j.enbuild.2006.01.006.

[6] M. Maerefat; AP. Haghighi; passive cooling of building by using integrated earth to air heat exchanger and solar chimney; Renewable Energy 35; 2010; pp. 2316-2324. doi: 10.1016/j.renene.2010.03.003.

[7] GS. Brager; RJ. De dear; A standard for natural ventilation; ASHRAE Journal 42(10); 2000; pp. 21-28.

[8] BIS; Bureau of Indian Standards; Handbook of Functional Requirements of Buildings 1997 ISBN81-7061-011-7.

[9] KS. Ong; A mathematical model of a solar chimney; Renewable Energy 28; 2003; pp. 1047-1060. doi: 10.1016/S0960-1481(02)00057-5.

[10] J. Mathur; NK. Bansal; S. Mathur; M. Jain; Experimental investigations on solar chimney for room ventilation; Solar Energy 80; 2006; pp. 927-935. doi: 10.1016/j.solener.2005.08.008.

[11] As. Dhaliwal; DY. Goswami; Heat transfer analysis in environmental control using an underground air tunnel; Journal of Solar Energy Engineering 107; 1985; 141-145. doi: 10.1115/1.3267667.

Citations in Crossref