CFD Analysis of Smoke and Temperature Control System of an Indoor Parking Lot with Jet Fans

Senveli, Anil; Dizman, Tolga; Çelen, Ali; Bilge, Duriye; Dalkılıç, Ahmet Selim

doi:10.18186/jte.02276

Cited by 13 publications

(8 citation statements)

References 10 publications

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“…The numerical simulation was performed in the (Autodesk CFD, Ansys, SimScale) modelling environment, and the purpose of the study is to determine the behaviour of a ventilation system with impulse fans operating in an underground car park, to identify possible methods of streamlining the system. [2], [3], [6], [13], [17], [19] For the analysis of the scenarios considered in the present study, a P2 type underground parking lot with a capacity of 250 vehicles was used. The car park has a single level located in the basement of an office building, with an area of 6750 m 2 and a height of 3.5 m, resulting in a total volume of 23625 m 3 .…”

Section: Numerical Modellingmentioning

confidence: 99%

21. Performance of Ventilation and Smoke Exhaust Systems in Case of Fire in Underground Parking Lots: Case Study

Bălan¹,

Verdeș²,

Ciocan³

et al. 2020

Proceedings of International Conference Building Services and Energy Efficiency

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The purpose of this study was to analyse a ventilation system with impulse fans, which acts to ensure optimal air parameters and to evacuate smoke in case of fire in an underground car park. Given the number of parameters to be taken into account in the spread of smoke, there is a high chance of introducing calculation errors if only conventional methods are used. In this study, CFD simulations were used to compare the various stages of operation of the ventilation system, as well as their effectiveness in the proposed scenarios. In the case of the ventilation scenario, the concentration of carbon monoxide (CO) reached maximum values of 360 PPM, exceeding the maximum allowed value of 100 PPM, this endangering the users of the underground car park. In the second phase, we analysed the operation of the ventilation system simultaneously with that of the impulse fans for the two targeted functions and in this case the maximum concentration reached was 60 PPM, which indicates that this system configuration fulfils the function for which it was designed. The results showed, in the case of the scenarios, that the addition of impulse fans as complementary elements to the ventilation system substantially improved the reduction in the concentration of carbon monoxide (CO) and increased fire visibility in the parking lot.

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Section: Numerical Modellingmentioning

confidence: 99%

21. Performance of Ventilation and Smoke Exhaust Systems in Case of Fire in Underground Parking Lots: Case Study

Bălan¹,

Verdeș²,

Ciocan³

et al. 2020

Proceedings of International Conference Building Services and Energy Efficiency

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“…Numerical methods such as CFD have been used to study ventilation flows for a wide variety of application such as parking lots [22], passive cooling [23], radiant heated ceiling [24], effect of insulating wall paints on space conditioning [25], underground car parks [26], office rooms [27], natural ventilation [28] and pollution in hospital [29][30][31][32][33][34][35] . In general it is more cheaper and faster than the analytical and experimental methods.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Natural Convection in a Heated Room and Its Implication on Thermal Comfort

Anthony

Verma

2021

Journal of Thermal Engineering

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A heated room is numerically analyzed to study thermal comfort. Cold air flowing in from the inlet gets heated by a heat source (placed just below the inlet), before being distributed throughout the room. The presence of the heat source and a high Rayleigh number causes the flow of air to be buoyant and turbulent. Two RANS based turbulence models, RNG k-ε and k-ω SST turbulence models are used to model turbulence and the Discrete Ordinate (DO) radiation model is used to model radiation heat transfer between different surfaces in the room. In order to account for buoyant air movement, air is approximated as a Boussinesq fluid. Parameters that affect comfort such as comfort temperature, operative temperature, turbulence intensity, velocity and the temperature difference between the head and ankle level are investigated. It is found that the comfort temperature and operative temperature predicted in this study have similar profiles irrespective of the turbulence models. Predicted values of turbulence intensity and velocity were low, which shows a low risk of drought in the occupied zone. The two RANS models give results similar to earlier studies that were performed with different turbulence and radiation models, proving their robustness and viability for a variety of flow problems.

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“…Several other studies [55]- [69] examined the effect of thermal performance through mini channels, microprocessors, staggered and pin fin heat sink using nanofluid. The current work on computational modeling can be further enhanced in finding the temperature profile and other parameters through various thermodynamic models [70][71][72][73][74][75][76][77][78][79]. Therefore, many researchers developed different solutions for the slurry flow using limited experimental data.…”

Section: Introductionmentioning

confidence: 99%

CFD Modeling of Slurry Pipeline at Different Prandtl Numbers

Parkash¹,

Kumar²,

Sikarwar³

2021

Journal of Thermal Engineering

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The present work shows the slurry flow characteristics of glass beads having density 2470 kg/m3 at different Prandtl number through a horizontal pipeline. The simulation is conducted by Eulerian two-phase model using RNG k-ε turbulence closure in available commercial software ANSYS FLUENT. The transportation of solid particulates has the settling behaviour in the slurry pipeline and that leads to the sedimentation and blockage of the pipeline resulting more power and pressure drop in the pipeline. Therefore, it is important to know the transport capability of the solid particulates at different Prandtl fluids to minimise the pressure loss. The fluid properties at four Prandtl numbers i.e. 1.34, 2.14, 3.42 and 5.83 is used to carry the solid concentration ranges from 30-50 % (by volume) at mean flow-velocity ranging from 3 to 5 ms-1 . The obtained computational results are validated with the published data in the literature. The results show that the pressure-drop rises with escalation in flow velocity and solid concentration at all Prandtl number. It is found that the suspension stability enhancement is considerable for lower range of Prandtl number and decreases for higher range of Prandtl number. Finally, glass beads concentration contours, velocity contours, concentration profile, velocity profiles and pressure drop are predicted to understand the slurry flow for chosen Prandtl numbers.

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CFD Analysis of Smoke and Temperature Control System of an Indoor Parking Lot with Jet Fans

Cited by 13 publications

References 10 publications

21. Performance of Ventilation and Smoke Exhaust Systems in Case of Fire in Underground Parking Lots: Case Study

21. Performance of Ventilation and Smoke Exhaust Systems in Case of Fire in Underground Parking Lots: Case Study

Numerical Analysis of Natural Convection in a Heated Room and Its Implication on Thermal Comfort

CFD Modeling of Slurry Pipeline at Different Prandtl Numbers

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