Hybrid ventilation in two interconnected rooms with a buoyancy source

Tovar, R.; Linden, P. F.; Thomas, L. P.

doi:10.1016/j.solener.2006.08.009

Cited by 16 publications

(9 citation statements)

References 7 publications

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“…The well-mixed assumption (Tovar et al, 2007;Woods et al, 2003;Caufield et al, 2002) allows us to analyze the long-term density evolution of the fluid by a mass balance. In order to justify the use of the well-mixed model, it is necessary to have significant bidirectional flow and associated plumes passing through the internal opening.…”

Section: The Well-mixed Modelmentioning

confidence: 99%

“…Downloaded by [University of California Santa Barbara] at 12:56 22 June 2016 Tovar et al (2007) studied several configurations for two rooms, with one or two openings in the dividing-wall and with an exterior vent located at the ceiling of the unforced room. They observed that the large internal flows, organized by the locations and number of the dividing-wall openings, significantly changed the ventilation efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…They observed that the large internal flows, organized by the locations and number of the dividing-wall openings, significantly changed the ventilation efficiency. Thomas et al (2008) extended the work of Tovar et al (2007) varying the location and size of the two interior openings in the dividing-wall. They used the concept of an 'equivalent layer' that represented a non-uniform temperature profile which provided physical insight and simplified the mathematical solution.…”

Section: Introductionmentioning

confidence: 99%

“…In the papers of Flying (2006), Tovar et al (2007) and Chenvidyakarn et al (2010), the effect of the external vent means that the ultimate temperature achieved within the rooms depends on the nature of the air-exchange across the vent. If the vent is at the top of a room which is cooler than the environment, then the only flow that occurs through the vent is a result of the addition of a volume flux within the rooms, such as might be caused by forced-air air conditioning.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper the work of Tovar et al (2007) is extended by considering a single opening in the partition wall and a low-level, rather than a highlevel, external vent in the unforced room. Negative buoyancy is introduced into the forced room with a finite volume flux.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Stack-Driven Ventilation in Two Interconnected Rooms Sharing a Single Opening and Connected to the Exterior by a Lower Vent

Tovar

Garrido

2010

International Journal of Ventilation

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This paper describes the transient ventilation of two interconnected rooms. One of them has a negative buoyancy source located at ceiling level, similar to an overhead split type air-conditioning system with ductless distribution, whereas the other has a vent at floor level. The flow evolution from short-and longterm analytical models was determined and confirmed with scale-model salt bath experiments. The shortterm model predicts the depth of the dense-layer 'first front' until it reaches the ceiling of the first room, and the long-term model predicts the density evolution of the fluid until it reaches a steady value. The advance of the first front depends on the location of the interior opening but is independent of the size of the exterior vent. The long-term density evolution depends on both parameters. As the interior opening is lowered, the volume implicated in the dynamics decreases and the dense fluid density increases at a higher rate. Furthermore, increasing the size of the exterior vent causes a turbulent exchange flow to develop through that vent, which inhibits the increase of the average density by introducing ambient fluid to the rooms.

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Section: The Well-mixed Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%