Experimental and Numerical Study of a Ventilated Room with Located Heat Sources

Hinojosa, J.; Orozco, Diego; Xamán, J.

doi:10.1061/(asce)ey.1943-7897.0000674

Cited by 6 publications

(3 citation statements)

References 23 publications

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“…The turbulence terms (−ρu i u j and ρu i T j ) in Equations ( 3) and (4) were solved with the RNG k − model. Common RANS turbulence models (standard k − ω, standard k − ε, RNG k − ε, Low Reynolds number k − ω) were successfully used for simulations of solar chimneys [9,17,37,38]. Particularly, Gan [9] and Hinojosa et al [37] reported that the RNG k − ε model offered the best performance at Ra ≈ 10 10 − 10 12 , which is close to the Rayleigh numbers in this study.…”

Section: Cfd Modelsupporting

confidence: 73%

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CFD Analysis of Different Ventilation Strategies for a Room with a Heated Wall

Nguyen

Tran

et al. 2022

Buildings

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Solar chimneys can help to reduce solar heat gain on a building envelope and to enhance natural ventilation. In this work, we proposed three configurations of two solar chimneys combined with a heated wall for the natural ventilation of a room: (I) the chimneys are connected serially, (II) the chimneys are parallel and exhaust air at two separate outlets, and (III) the chimneys are parallel, but the outlets are combined. The airflow rate achieved with each configuration was predicted with a Computational Fluid Dynamics model. The results show the effects of the heat flux in each channel and the geometries of the channels. Configuration (II) shows the highest flow rate. Particularly, the proposed configurations enhance the flow rate significantly and up to 40% when compared to the typical setup with a single channel solar chimney. The findings offer a novel design option for building façades for reducing solar heat gain and enhancing natural ventilation.

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Section: Cfd Modelsupporting

confidence: 73%

“…Therefore, the RNG 𝑘 𝜖 model was selected. Details of the formulations can be seen in [9,14,15,28,32,33,37].…”

Section: Cfd Modelmentioning

confidence: 99%

CFD Analysis of Different Ventilation Strategies for a Room with a Heated Wall

Nguyen

Tran

et al. 2022

Buildings

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“…The Realizable k-ε turbulence model was chosen as the turbulent model [28]. The governing equation for the turbulent flow is given by:…”

Section: Realizable K-ε Turbulence Modelmentioning

confidence: 99%

Experimental and Numerical Study of a Two-Stage Swirl Burner

Lin

Zhang

et al. 2022

Energies

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In this study, we developed the design process and optimization of structural parameters of a new low-NOx burner based on low-NOx combustion technology and the flame stabilization principle. Firstly, on the basis of the two-stage swirl burner, we applied the fuel-graded combustion technology and introduced the central nozzle structure to explore the influence law of graded combustion on NOx emissions. Secondly, on the previously optimized structure, the matching law between the first- and second-stage cyclone blades is analyzed to obtain the optimum structural design solution for heat exchange efficiency and flame front length. Finally, a new conical blunt structure is introduced in conjunction with the flame stabilization principle, and we discuss the effects of different half cone angles on the flame stabilization, flame front length, and heat exchange efficiency of the burner. The research in this paper provides a reliable direction for the design optimization of low-NOx burners.

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