Document Type : Research Article

Authors

1 Department of Architecture, Kermanshah Branch, Islamic Azad University, Kermanshah, Kermanshah, Iran.

2 Architecture Department, Razi University, Kermanshah, Kermanshah, Iran.

Abstract

Increasing fossil fuel consumption in the building, especially in the air-conditioning sector, has increased environmental pollution and global warming. In this research, a zero-energy passive system was designed to ventilate the building and provide comfortable conditions for people in the summer. A hybrid passive system was designed for indoor cooling to minimize fossil energy use. This research was done experimentally- and analytically and by simulation. An experimental study comprising a test chamber and simulation using Builder Design software was carried out to evaluate the cooling and ventilation potential of a hybrid passive system functioning. In the experimental section, air temperature, humidity, and airflow for the outdoor environment and the output of the evaporative cooling channel were measured. These measurements were tested in August from 9:00 AM to 3:00 PM for six consecutive days. The obtained experimental data were given to Design Builder software as an input parameter, and then, the comfort conditions inside the chamber, the dimensions, and location of the air inlet valve into the chamber were examined. The findings showed that the proposed system could reduce the air temperature by an average of 10 oC and increase the air humidity by 33 %. The findings showed that the air inside the chamber was comfortable during the hottest hours of the day. Raising the valve location, increasing the area, and increasing the volumetric flow rate of the air increased the percentage of dissatisfaction. The findings showed that in addition to wind speed and air temperature, the geometrical shape of the air inlet opening contributes to indoor air comfort conditions.

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Main Subjects

1.     Santamouris, M. and Kolokotsa, D., "Passive cooling dissipation techniques for buildings and other structures: The state of the art", Energy and Buildings, Vol. 57, No. 2, (2013), 74-94. (https://doi.org/10.1016/j.enbuild.2012.11.002).
2.     Hossein Ghadiri, M., Lukman, N., Ibrahim, N. and Mohamed, M.F., "Computational analysis of wind-driven natural ventilation in a two sided rectangular wind catcher", International Journal of Ventilation, Vol. 12, No. 1, (2013), 51-62. (https://doi.org/10.1080/14733315.2013.11684002).
3.     Moosavi, L., Mahyuddin, N., Ghafar, N.A. and Ismail, M.A., "Thermal performance of atria: An overview of natural ventilation effective designs", Renewable and Sustainable Energy Reviews, Vol. 34, No. 6, (2014), 654-670. (https://doi.org/10.1016/j.rser.2014.02.035).
4.     Chenari, B., Carrilho, J.D. and Silva, M.G., "Towards sustainable, energy efficient and healthy ventilation strategies in buildings: A review", Renewable and Sustainable Energy Reviews, Vol. 59, No. 7, (2016), 1426-1447. (https://doi.org/10.1016/j.rser.2016.01.074).
5.     Manzano-Agugliaro, F., Montoya, F.G., Sabio-Ortega, A. and García-Cruz, A., "Review of bioclimatic architecture strategies for achieving thermal comfort", Renewable and Sustainable Energy Reviews, Vol. 49, No. 9, (2015), 736-755. (https://doi.org/10.1016/j.rser.2015.04.095).
6.     Hanif, M., Mahlia, T.M.I., Zare, A., Saksahdan, T.J. and Metselaar, H.S.C., "Potential energy savings by radiative cooling system for a building in tropical climate", Renewable and Sustainable Energy Reviews, Vol. 32, No. 4, (2014), 642-650. (https://doi.org/10.1016/j.rser.2014.01.053).
7.     Daghigh, R., "Assessing the thermal comfort and ventilation in Malaysia and the surrounding regions", Renewable and Sustainable Energy Reviews, Vol. 48, No. 8, (2015), 681-691. (https://doi.org/10.1016/j.rser.2015.04.017).
8.     Alaidroos, A. and Krarti, M., "Numerical modeling of ventilated wall cavities with spray evaporative cooling systems", Energy and Buildings, Vol. 130, No. 15, (2016), 350-365. (https://doi.org/10.1016/j.enbuild.2016.08.046).
9.     Kalantar, V., "Numerical simulation of cooling performance of wind tower (Baud-Geer) in hot and arid region", Renewable Energy, Vol. 34, No. 1, (2009), 246-254. (https://doi.org/10.1016/j.renene.2008.03.007).
10.   Lechner, N., Sustainable design methods for architects, John Wiley & Sons, New York, (2001). (www.wiley.com/go/permissions).
11.   Jafarian, S.M., Haseli, P. and Taheri, M., "Performance analysis of a passive cooling system using underground channel (Naghb)", Energy and Buildings, Vol. 42, No. 5, (2015), 559-562. (https://doi.org/10.1016/j.enbuild.2009.10.025).
12.   Badran, A.A., "Performance of cool towers under various climates in Jordan", Energy and Buildings, Vol. 35, No. 10, (2003), 1031-1035. (https://doi.org/10.1016/S0378-7788(03)00067-7).
13.   Bahadori, M.N., Mazidi, M. and Dehghani, A.R., "Experimental investigation of new designs of wind towers", Renewable Energy, Vol 33, No. 10, (2008), 2273-2281. (https://doi.org/10.1016/j.renene.2007.12.018).
14.   Chiesa, G. and Grosso, M., "Direct evaporative passive cooling of building: A comparison amid simplified simulation models based on experimental data", Building and Environment, Vol. 94, No. 1, (2015), 263-272. (https://doi.org/10.1016/j.buildenv.2015.08.014).
15.   Bouchahm, Y., Bourbia, F. and Belhamri, A., "Performance analysis and improvement of the use of wind tower in hot dry climate", Renewable Energy, Vol. 36, No, 3, (2011), 898-906. (https://doi.org/10.1016/j.renene.2010.08.030).
16.   Duffie, J.A. and Beckman, W.A., Solar engineering of thermal processes, John Wiley & Sons, United States, (1991). (https://doi.org/10.1002/9781118671603).
17.   Afonso, C. and Oliveira, A., "Solar chimneys: Simulation and experiment", Energy and Buildings, Vol. 32, No. 1, (2000), 71-79. (https://doi.org/10.1016/S0378-7788(99)00038-9).
18.   Chen, Z.D., Bandopadhayaya, P., Halldorssonb, J., Byrjalsenb, C., Heiselbergb, P. and Lic, Y., "An experimental investigation of a solar chimney model with uniform wall heat flux", Building and Environment, Vol. 38, No. 7, (2003), 893-906. (https://doi.org/10.1016/S0360-1323(03)00057-X).
19.   Mathur, J., Bansal, N.K., Mathur, S., Jain, N. and Anupma, "Experimental investigations on solar chimney for room ventilation", Solar Energy, Vol. 80, No. 8, (2006), 927-935. (https://doi.org/10.1016/j.solener.2005.08.008).
20.   Miyazaki, T., Akisawa, A. and Kashiwagi, T., "The effects of solar chimneys on thermal load mitigation of office buildings under the Japanese climate", Renewable Energy, Vol. 31, No. 7, (2006), 987-1010. (https://doi.org/10.1016/j.renene.2005.05.003).
21.   Punyasompun, S., Hirunlabh, J., Khedari, J. and Zeghmati, B., "Investigation on the application of solar chimney for multi-story buildings", Renewable Energy, Vol. 34, No. 12, (2009), 2545–2561. (https://doi.org/10.1016/j.renene.2009.03.032).
22.   Bansal, N.K., Mathur, R. and Bhandari, M.S., "A study of solar chimney assisted wind tower system for natural ventilation in buildings", Building and Environment, Vol. 29, No. 4, (1994), 495-500. (https://doi.org/10.1016/0360-1323(94)90008-6).
23.   Kermanshah Meteorological Department, Statistics and information of Kermanshah province, (2018). (http://www.kermanshahmet.ir/met/amar).
24.   Fanger, P., "Thermal comfort: analysis and applications in environmental engineering", McGraw-Hill, New York, (1991). (https://doi.org/10.1177/146642407209200337).
25.   ASHRAE Standard 55, Thermal environmental conditions for human occupancy, ASHRAE, New York, (2017). (http://www.ashrae.org/template/TechnologyLinkLanding/category/1631).