A systematic approach to describe the air terminal device in CFD simulation for room air distribution analysis

Huo, Yan; Haghighat, Fariborz; Zhang, J.S; Shaw, C.Y.

doi:10.1016/s0360-1323(99)00047-5

Cited by 42 publications

(15 citation statements)

References 6 publications

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“…Energy saving potential was 20 to 30% at low occupancy open plan office and was 3 to 5% at high occupancy open plan office [17]. In addition, a comparison between DCV-CO 2 and CAV system were conducted in Montreal office building and found energy saving of 12% for DCV-CO 2 over CAV system while keeping same quality of thermal comfort and IAQ [18]. Another study [19] found significant reduction of running cost which was nearly 50% for DCV-CO 2 system compare to fixed outdoor air flow system in high rise multi-zone office building.…”

Section: Page 4 Of 38mentioning

confidence: 97%

“…Insert Figure 15 here M a n u s c r i p t 18 To analyze the effect of individual ventilation and cooling, active chilled beams were replaced with ceiling cooling panel in 'Ref.EA.GC Case' and results are shown in Figure 16. The cooling capacity of a ceiling cooling panel did not depend on supply airflow rate that was a feature of active chilled beam cases.…”

Section: Calculation Logic Of the Footprint Is Shown Inmentioning

confidence: 99%

See 1 more Smart Citation

Demand controlled ventilation indoor climate and energy performance in a high performance building with air flow rate controlled chilled beams

Ahmed

Kurnitski

Sormunen

2015

Energy and Buildings

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Section: Page 4 Of 38mentioning

confidence: 97%

Section: Calculation Logic Of the Footprint Is Shown Inmentioning

confidence: 99%

Demand controlled ventilation indoor climate and energy performance in a high performance building with air flow rate controlled chilled beams

Ahmed

Kurnitski

Sormunen

2015

Energy and Buildings

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“…This supply air diffuser spreads in all directions and its modelling is complicated. Referring to literature (Huo et al 2000) useful suggestions provided by the method for describing the supply air diffuser boundary conditions were taken into account for the CFD simulation, using the diffuser characteristic jet equations. This allowed comparison of the real data provided by the company on the air inlet velocity and its downward flow from the ceiling with those obtained by first basic simulations (Fig.…”

Section: Solid Modellingmentioning

confidence: 99%

Hospital ventilation simulation for the study of potential exposure to contaminants

Balocco¹

2011

Build. Simul.

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Airflow and ventilation are particularly important in healthcare rooms for controlling thermohygrometric conditions, providing anaesthetic gas removal, diluting airborne bacterial contamination and minimizing bacteria transfer airborne. An actual hospitalization room was the investigate case study. Transient simulations with computational fluid dynamics (CFD), based on the finite element method (FEM) were performed to investigate the efficiency of the existing heating, ventilation and air-conditioning (HVAC) plant with a variable air volume (VAV) primary air system. Solid modelling of the room, taking into account thermo-physical properties of building materials, architectural features (e.g., window and wall orientation) and furnishing (e.g., beds, tables and lamps) arrangement of the room, inlet turbulence high induction air diffuser, the return air diffusers and two patients lying on two parallel beds was carried out. Multiphysics modelling was used: a thermo-fluidynamic model (convection-conduction and incompressible Navier-Stokes) was combined with a convectiondiffusion model. Three 3D models were elaborated considering different conditions/events of the patients (i.e., the first was considered coughing and/or the second breathing). A particle tracing and diffusion model, connected to cough events, was developed to simulate the dispersal of bacteria-carrying droplets in the isolation room equipped with the existing ventilation system. An analysis of the region of droplet fallout and the dilution time of bacteria diffusion of coughed gas in the isolation room was performed. The analysis of transient simulation results concerning particle path and distance, and then particle tracing combined with their concentration, provided evidence of the formation of zones that should be checked by microclimatic and contaminant control. The present study highlights the fact that the CFD-FEM application is useful for understanding the efficiency, adequacy and reliability of the ventilation system, but also provides important suggestions for controlling air quality, patients' comfort and energy consumption in a hospital.

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“…Several methods have been developed such as conventional method [14], box method [15], momentum method [16], etc. A series of square four-way ceiling diffuser models which include models A to E are developed and validated recently [17].…”

Section: Article In Pressmentioning

confidence: 99%

Three-dimensional numerical simulation of a hybrid fresh air and recirculated air diffuser for decoupled ventilation strategy

Yang

Sekhar

2007

Building and Environment

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A systematic approach to describe the air terminal device in CFD simulation for room air distribution analysis

Cited by 42 publications

References 6 publications

Demand controlled ventilation indoor climate and energy performance in a high performance building with air flow rate controlled chilled beams

Demand controlled ventilation indoor climate and energy performance in a high performance building with air flow rate controlled chilled beams

Hospital ventilation simulation for the study of potential exposure to contaminants

Three-dimensional numerical simulation of a hybrid fresh air and recirculated air diffuser for decoupled ventilation strategy

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