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Buoyancy Effects on Natural Ventilation.
Describes the fundamental effects of buoyancy, a key force in driving air and transporting heat and pollutants around a building's interior.
| Clasificación: | Libro Electrónico |
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| Autor principal: | |
| Formato: | Electrónico eBook |
| Idioma: | Inglés |
| Publicado: |
New York :
Cambridge University Press,
2013.
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| Temas: | |
| Acceso en línea: | Texto completo |
Tabla de Contenidos:
- Preface; Acknowledgements; 1 Introduction; 1.1. The modelling quest; 1.2. Water-bath modelling; 1.3. The theoretical basis; 1.4. Applicability of water-bath modelling; 1.5. The cases examined; 2 Some preliminaries; 2.1. Various conservation laws; 2.1.1. Conservation of mass; 2.1.2. Conservation of thermal energy; 2.1.3. Conservation of buoyancy flux; 2.2. Equilibrium and neutral level; 2.3. Bernoullis theorem; 2.4. Effective opening area; 2.5. Application of the basic principles; 3 Sources of identical sign; 3.1. Residual buoyancy; 3.1.1. Mixing ventilation.
- 3.1.2. Displacement ventilation3.2. The localised source; 3.2.1. Plume theory; 3.2.2. Sealed enclosure; 3.2.3. Ventilated enclosure; 3.2.4. Transient responses; 3.2.5. Multiple localised sources; 3.3. The distributed source; 3.3.1. Steady-state flow regime; 3.3.2. Evolution to steady state; 3.3.2.1. A room initially at the exterior air temperature or slightly warmer than it; 3.3.2.2. A room initially warmer than the desired temperature; 3.3.2.3. A room initially colder than the exterior air temperature; 3.4. A combination of the localised source and the distributed source.
- 4 Sources of opposite sign4.1. Flushing with pre-cooled air; 4.2. Pre-cooled ventilation of occupied spaces; 4.2.1. Cooling to above ambient air temperature; 4.2.2. Cooling to below ambient air temperature; 4.3. Maintained source of heat and internal cooling; 4.3.1. Distributed source of heat and distributed source of cooling; 4.3.2. Localised source of heat and distributed source of cooling; 4.3.3. Localised source of heat and localised source of cooling; 5 Some common flow complications arising from more complex geometries; 5.1. Openings at more than two levels; 5.1.1. Multiple stacks.
- 5.1.2. Multiple side openings5.2. Multiple connected spaces; 5.2.1. Multi-storey buildings; 5.2.2. Spaces connected sideways; Final remarks; References; Index.