Design of a Tube Vent to Enhance the Role of Roof Solar Collector

Authors: Eakkasak Susakunphaisan, Pichai Namprakai, Withaya Puangsombut

Abstract:

The objective of this paper was to designing a ventilation system to enhance the performance of roof solar collector (RSC) for reducing heat accumulation inside the house. The RSC has 1.8 m2 surface area made of CPAC monier roof tiles on the upper part and gypsum board on the lower part. The space between CPAC monier and gypsum board was fixed at 14 cm. Ventilation system of modified roof solar collector (modified RSC) consists of 9 tubes of 0.15m diameter and installed in the lower part of RSC. Experimental result showed that the temperature of the room, and attic temperature. The average temperature reduction of room of house used modified RSC is about 2oC. and the percentage of room temperature reduction varied between 0 to 10%. Therefore, modified RSC is an interesting option in the sense that it promotes solar energy and conserve energy.

Keywords: roof solar collector, heat accumulation

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1333184

References:

[1] Waewsak, J., Hirunlabh, J. and Khedari, J. and Shin, U. C., 2003, Performance evaluation of the BSRC multi-purpose bio-climatic roof, Building and Environment, Vol. 38, pp. 1297-1302.
[2] Caren M, Roberto L, Saulo G., 2008. Evaluation of heat flux reduction provided by the use of radiant barriers in clay tile roofs, Energy and Buildings, Vol.40, pp. 445-451.
[3] Sudaporn Chungloo, Bundit Limmeechokchai., 2007. Application of passive cooling systems in the hot and humid climate: The case study of solar chimney and wetted roof in Thailand, Building and Environment, Vol.42, pp.3341-3351.
[4] Nankongnab, N., Puangsombut, W., Hirunlabh, J., and Khedari, J., Insiripong, S., U-Cheul Shin, 2005, Field investigation on hygrothermal performance of full-vent perforated soffit and ceiling," Solar Energy , Vol. 80, pp. 936-948.
[5] Waewsak, J., Hirunlabh, J. and Khedari, J., 2000, Designing of a Thai Bio-Climatic Roof, The World Renewable Energy Congress-VI, 1-7 July, Brighton, UK, pp. 1830-1833.
[6] Khedari, J., Ingkawanich, S., Waewsak, J., Hirunlabh, J., 2002. A PV system enhanced the performance of roof solar collector., Building & Environment, Vol.37, pp.1317-1320.
[7] S. Maneewan, J. Hirunlabh, J. Khedari, B. Zeghmati, S. Teekasap, 2005. Heat gain reduction by means of thermoelectric roof solar collector, Solar Energy, Vol.78, pp.495-503.