Investigation of natural ventilation in a public place in winter season with the comparison of experimentation and CFD results

Date

2016-12-01

Author

Bayer, Özgür

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In educational buildings, efficient ventilation is vital for better indoor air quality and less contaminant level. High level of carbon dioxide concentration causes to drop in concentration and learning capacities of students in addition to headache, dizziness and rapid spreading of infections. In order to provide high indoor air quality; indoor temperature, carbon dioxide level, air humidity and air flow rate should be in the comfortable zone defined by standards. Natural ventilation is preferable solution since it provides improved indoor air quality with reduced energy consumption. The present study investigates the applicability of natural ventilation in the Middle East Technical University Library Reserve Section in Ankara, Turkey for desired indoor air quality defined by ASHRAE air quality standards. Temperature, carbon dioxide concentration and relative humidity data are collected during experimentation period. In the analyses, single zone model is considered. Computational fluid dynamics (CFD) analysis will are also performed for the comparison of results. Comfortable air flow rate is examined using CFD analysis. Energy saving for winter conditions is calculated. According to the results, solutions are provided for a better indoor air quality and application of natural ventilation. Experimental and numerical results clarify that natural ventilation can be used in winter times in order to reduce the carbon dioxide concentration inside the zone. Mathematical results show that there is an energy saving about 8,34 percent with usage of natural ventilation. The carbon dioxide concentration in the zone is decreased from 1147 ppm to 1000 ppm during 3 hours with the help of natural ventilation without usage of electricity. CFD results will be compared with these result.

Subject Keywords

Zonal model, Carbon dioxide, Air quality, Natural ventilation

URI

https://hdl.handle.net/11511/70723
https://vbn.aau.dk/ws/portalfiles/portal/233719302/paper_123.pdf

Conference Name

12th REHVA World Congress CLIMA 2016

Collections

Department of Mechanical Engineering, Conference / Seminar

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Citation Formats

Ö. Bayer, “Investigation of natural ventilation in a public place in winter season with the comparison of experimentation and CFD results,” presented at the 12th REHVA World Congress CLIMA 2016, Aalborg, Danimarka, 22 - 25 May 2016, 2016, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/70723.