Influence of reduced VAV flow settings on indoor thermal comfort in an office space

Gangisetti, Kavita; Claridge, D. E.; Srebric, Jelena; Paulus, Mitchell T.

doi:10.1007/s12273-015-0254-3

Cited by 17 publications

(9 citation statements)

References 25 publications

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“…On the other hand, CFD simulation programs are a powerful tool for estimating the airflow patterns and thermal environment of various heating, ventilation, and air conditioning (HVAC) systems in a very detailed way. They have been used for the estimation and control of the indoor environment and space ventilation when using different ventilation systems [30][31][32][33]. Furthermore, they have been used to analyse the influence of structures on airflow [34][35][36][37] and contaminant migration [26,38,39].…”

Section: Of 11mentioning

confidence: 99%

Comparison of CFD and Multizone Modeling from Contaminant Migration from a Household Gas Furnace

Szczepanik-Ścisło

Ścisło

2021

Atmosphere

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In Central and Eastern Europe, a growing popularity of gas heaters as the main source of heat and domestic hot water can be observed. This is the result of new laws and strategies for funding that have been put in place to encourage households to stop using coal and replace it with cleaner energy sources. However, there is a growing concern that gas furnaces are prone to malfunction and can be a threat to occupants through CO (carbon monoxide) generation. To see how a faulty gas furnace with a clogged exhaust may affect a household, a series of multizone and computational fluid dynamics (CFD) simulations were carried out using the CONTAM software and CFD0 editor created by the National Institute of Standards and Technology (NIST). The simulations presented different placements of the furnace and ventilation outlet in an attached garage. The results showed how the placement influenced contaminant migration and occupant exposure to CO. It changed the amount of CO that infiltrated to the attached house and influenced occupant exposure. The results may be used by future users to minimize the risk of CO poisoning by using the proper natural ventilation methods together with optimal placement of the header in the household.

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Section: Of 11mentioning

confidence: 99%

Comparison of CFD and Multizone Modeling from Contaminant Migration from a Household Gas Furnace

Szczepanik-Ścisło

Ścisło

2021

Atmosphere

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“…The target of the system operation is to maintain a good thermal environment for occupants and stable ventilation air distribution in varying conditions [11]. However, the airflow patterns of air distribution with variable air volume (VAV) modes can be varied from the designed condition [12,13], which might cause energy wastes and local thermal discomforts such as temperature gradient [14] or draught [15]. Thus, it is important to guarantee the performance of air distribution systems with VAV modes under different heat gain levels.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of five different VAV air terminal devices under variable heat gain conditions in simulated office and meeting rooms

Mustakallio²,

Kosonen

et al. 2022

Building and Environment

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“…Additionally, CFD simulations are a powerful tool for estimating the airflow patterns and thermal environment of various HVAC (heating, ventilation, and air conditioning) systems. They were used for the estimation and control of indoor environment and space ventilation when using a VAV system by Sun and Wang [39], Du et al [40], Gangisetti et al [41], and Nada et al [42], among others. Furthermore, they were used to analyze the influence of structures on airflow, for example, by Mu et al [43].…”

Section: Introductionmentioning

confidence: 99%

An Air Terminal Device with a Changing Geometry to Improve Indoor Air Quality for VAV Ventilation Systems

Szczepanik-Ścisło

Schnotale

2020

Energies

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This study aimed to develop a new concept for an air terminal device for a VAV (variable air volume) ventilation system that would improve overall ventilation efficiency under a varying air supply volume. In VAV systems, air volume is modified according to the thermal load in each ventilated zone. However, lowering the airflow may cause a lack of proper air distribution and lead to the degradation of hygienic conditions. To combat this phenomenon, an air terminal device with an adapting geometry to stabilize the air throw, such that it remains constant despite the changing air volume supplied through the ventilation system, was designed and studied. Simulations that were performed using the RNG k–ε model in the ANSYS Fluent application were later validated on a laboratory stand. The results of the study show that, when using the newly proposed terminal device with an adaptive geometry, it is possible to stabilize the air throw. The thermal comfort parameters such as the PMV (predicted mean vote) and PPD (predicted percentage of dissatisfied) proved that thermal comfort was maintained in a person-occupied area regardless of changing airflow though the ventilation system.

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Influence of reduced VAV flow settings on indoor thermal comfort in an office space

Cited by 17 publications

References 25 publications

Comparison of CFD and Multizone Modeling from Contaminant Migration from a Household Gas Furnace

Comparison of CFD and Multizone Modeling from Contaminant Migration from a Household Gas Furnace

Experimental study of five different VAV air terminal devices under variable heat gain conditions in simulated office and meeting rooms

An Air Terminal Device with a Changing Geometry to Improve Indoor Air Quality for VAV Ventilation Systems

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