Ventilation Performance Investigation of Roof Top Solar Chimney
American Journal of Mechanical and Industrial Engineering
Volume 5, Issue 2, March 2020, Pages: 15-23
Received: May 21, 2020; Accepted: Jun. 9, 2020; Published: Jun. 23, 2020
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Author
Tamerat Demeke Agonafer, Mechanical Engineering Department, Debre Berhan University, Debre Berhan, Ethiopia
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Abstract
The solar chimney is an innovation, which has been as of now demonstrated of being able to create electrical vitality from the sun likewise it has been introduced in different structures for ventilation, and next to no is thought about their genuine presentation and very panics are the application. This research work deals with the development of a physical, mathematical and computational models of roof solar chimney to rationalize the performance of ventilate in residential house. A thermal model enables to easily determine the inclination angle, absorber area, cavity width of the chimney and the air flow rate, using MATLAB. The simulation has been done for selected residential house of 264m3 located at Bahir Dar city, Ethiopia @ 11° latitude and 37° longitude. At comfort air speed (2m/s), a south faced system being tilted at an angle of 45° will have absorber length, the absorber height and cavity width about 3m, 4.24m, and 0.5m respectively. This will enable the residential house to circulate the air 560kg per hour. The maximum air temperature obtained at chimney outlet is 44.5°C. For a month of April an average solar intensity value is 900 W/m2. The main factor to induce buoyancy is solar insolation since it directly influences the air temperature, and the efficiency is about 44.4%.
Keywords
Air Change Rate, Natural Ventilation, Solar Chimney Performance, Solar Insolation
To cite this article
Tamerat Demeke Agonafer, Ventilation Performance Investigation of Roof Top Solar Chimney, American Journal of Mechanical and Industrial Engineering. Vol. 5, No. 2, 2020, pp. 15-23. doi: 10.11648/j.ajmie.20200502.11
Copyright
Copyright © 2020 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
References
[1]
Afrooz Ravanfar. “Simulation study of solar chimney assisted solarium”. (2003) Unpublished https://digital.library.ryerson.ca/islandora/object/RULA:2877
[2]
ASHRAE, S. 5. (2010.). Thermal Environmental Conditions for Human Occupancy, American Society of Heating, Refrigeration and Air Conditioning Engineers Inc.,. Atlanta. http://www.aicarr.org/Documents/Editoria_Libri/ASHRAE_PDF/STD55-2004.pdf
[3]
J. Hirunlabh, S. Wachirapuwadon, N. Pratinthong and J. Khedari, New configurations of a roof solar collector maximizing natural ventilation. Building and Environment, 36 (3): 383-391 • April 2001. DOI: 10.1016/S0360-1323(00)00016-0
[4]
Leticia Neves, Maurício Roriz and Fernando Marques da Silva. “modeling a solar chimney for maximum solar irradiation and Maximum airflow, for low latitude locations”. https://pdfs.semanticscholar.org/1166/8a0462fe9576d4f38615c2ebaaaccec8eea8.pdf?_ga=2.50201891.480476871.1588349553-776503668.1588349553
[5]
A. G. Li and P. J. Jones, Developments in strategies used for natural and mechanical ventilation in China. Indoor and Built Environment, 9, 65-74 (2000).
[6]
Ding, W., Hasemi, Y., & Yamada, T. (2005). Natural ventilation performance of a double-skin façade with a solar chimney. Energy and Buildings, 37(4), 411-418. https://doi.org/10.1016/j.enbuild.2004.08.002
[7]
Chungloo, M. A. and G. H. Limmeechokchai, 2008. The solar chimney overall effficiency, design and performance. Int. J. Ambient Energy, 8: 35-40
[8]
SP 1609 – 1618. “Modelling of thermal behaviour of a direct solar drier possessing a chimney: Application to the drying of cassava”. Indian Journal of Science and Technology Vol. 4 No. 12 (Dec 2011) ISSN: 0974- 6846 DOI: 10.17485/ijst/2011/v4i12/30294
[9]
Gang Wang, Bing Chen, Mingsheng Liu, Joerg Henkel, Stephan Raulin. “Analysis, design, and preliminary testing of solar chimney for residential air-conditioning applications”. p roc. ASME. ISEC2004, Solar Energy, 291-297, July 11–14, 2004. Paper No: ISEC2004-65093 https://doi.org/10.1115/ISEC2004-65093
[10]
M. N. Bahadori. “Viability of wind towers in achieving summer comfort in the hot-arid regions of the Middle East”. Renewable Energy, Volume 5, Issues 5–8, August 1994, Pages 879-892. https://doi.org/10. 1016/0960-1481(94)90108-2
[11]
K. B. Koua, P. Gbaha, E. P. M. Koffi, W. F. Fassinou and S. Toure. “Modelling of thermal behaviour of a direct solar drier possessing a chimney: Application to the drying of cassava”. Indian Journal of Science and Technology Vol. 4 No. 12 (Dec 2011) ISSN: 0974- 6846
[12]
A. M. Rodrigues A. Canha da Piedade A. Lahellec J. Y. Grandpeix. “Modeling natural convection in a heated vertical channel for room ventilation”. Building and Environment Volume 35, Issue 5, 1 July 2000, Pages 455-469 https://doi.org/10.1016/S0360-1323(99)00027-X
[13]
Hussain H. Al-Kayiem and Yit Man Heng. “Experimental investigation of rooftop solar chimney for natural ventilation”. ARPN Journal of Engineering and Applied Sciences VOL. 10, NO 21, NOVEMBER, 2015 ISSN 1819-6608
[14]
Shiv Lal, Kaushik C., Bhargava P. K. “Solar Chimney: A Sustainable Approach for Ventilation and Building Space Conditioning”. International journal for sustainable development, vol.2 issue 1 pp. 277-297, 2012, DOI: IJDS1211090
[15]
Leila Moosavi n. Norhayati Mahyuddin. Norafida Ab Ghafar. Muhammad Azzam Ismail 2014. Thermal performance of atria: An overview of natural ventilation effective designs. https://doi.org/10.1016/j.rser.2014.02.035
[16]
Sandberg, M., & Moshfegh, B. (2002). Buoyancy-induced air flow in photovoltaic facades: Effect of geometry of the air gap and location of solar cell modules. Building and Environment, 37, 211-218. http://dx.doi.org/10.1016/S0360-1323(01)00025-7
[17]
Sarachitti, R.; Hirunlabh, J.; Khedari, J. 3-D modeling of solar chimney-based ventilation system for building. In Proceedings of the World Renewable Energy Congress VI, Brighton, UK, 1–7 July 2000; pp. 690–693.
[18]
Leng Pau Chung, Mohd Hamdan Ahmad, Dilshan Remaz Ossen, Malsiah Hamid, Effective Solar Chimney Cross Section Ventilation Performance in Malaysia Terraced House. Volume 179 DO - 10.1016/j.sbspro.2015.02.431
[19]
Li, Yongcai & Liu, Shuli, 2014. "Experimental study on thermal performance of a solar chimney combined with PCM," Applied Energy, Elsevier, vol. 114 (C), pages 172-178.
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