dc.contributor.author Park, David en_US dc.date.accessioned 2016-11-10T09:00:16Z dc.date.available 2016-11-10T09:00:16Z dc.date.issued 2016-11-09 en_US dc.identifier.other vt_gsexam:9142 en_US dc.identifier.uri http://hdl.handle.net/10919/73418 dc.description.abstract This study sought to demonstrate the potential applications of the solar chimney for the naturally ventilating a building. Computational fluid dynamics (CFD) was used to model various room configurations to assess ventilation strategies. A parametric study of the solar chimney system was executed, and three-dimensional simulations were compared and validated with experiments. A new definition for the hydraulic diameter that incorporated the chimney geometry was developed to predict the flow regime in the solar chimney system. To mitigate the cost and effort to use experiments to analyze building energy, a mathematical approach was considered. A relationship between small- and full-scale models was investigated using non-dimensional analysis. Multiple parameters were involved in the mathematical model to predict the air velocity, where the predictions were in good agreement with experimental data as well as the numerical simulations from the present study. The second part of the study considered building design optimization to improve ventilation using air changes per hour (ACH) as a metric, and air circulation patterns within the building. An upper vent was introduced near the ceiling of the chimney system, which induced better air circulation by removing the warm air in the building. The study pursued to model a realistic scenario for the solar chimney system, where it investigated the effect of the vent sizes, insulation, and a reasonable solar chimney size. It was shown that it is critical to insulate the backside of the absorber and that the ratio of the conditioned area to chimney volume should be at least 10. Lastly, the application of the solar chimney system for basement ventilation was discussed. Appropriate vent locations in the basement were determined, where the best ventilation was achieved when the duct inlet was located near the ceiling and the exhaust vent was located near the floor of the chimney. Sufficient ventilation was also achieved even for scenarios of a congested building when modeling the presence of multiple people. en_US dc.format.medium ETD en_US dc.publisher Virginia Tech en_US dc.rights This Item is protected by copyright and/or related rights. Some uses of this Item may be deemed fair and permitted by law even without permission from the rights holder(s), or the rights holder(s) may have licensed the work for use under certain conditions. For other uses you need to obtain permission from the rights holder(s). en_US dc.subject Natural ventilation en_US dc.subject solar chimney en_US dc.subject buoyancy-driven flow en_US dc.subject building energy en_US dc.subject basement en_US dc.title The Application of the Solar Chimney for Ventilating Buildings en_US dc.type Dissertation en_US dc.contributor.department Mechanical Engineering en_US dc.description.degree PHD en_US thesis.degree.name PHD en_US thesis.degree.level doctoral en_US thesis.degree.grantor Virginia Polytechnic Institute and State University en_US thesis.degree.discipline Mechanical Engineering en_US dc.contributor.committeechair Battaglia, Francine en_US dc.contributor.committeemember Behkam, Bahareh en_US dc.contributor.committeemember Kornhauser, Alan A en_US dc.contributor.committeemember Huxtable, Scott T en_US dc.contributor.committeemember Staples, Anne E en_US
﻿