Effect of chimney height and collector roof angle on flow parameters of solar updraft tower plant

Solar updraft tower (SUT) is a viable option to produce electrical energy from solar energy. Extensive studies needed to estimate the flow parameters and analyse this set-up. A 3D numerical model is developed to analyse the flow parameters such as pressure, temperature and velocity of SUT plant. Eff...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2019-04, Vol.136 (1), p.133-145
Main Authors: Das, Pritam, Chandramohan, V. P
Format: Article
Language:English
Subjects:
Aerodynamics
Air flow
Air temperature
Computational fluid dynamics
Computer simulation
Mathematical models
Numerical analysis
Parameter estimation
Parametric statistics
Radiation (Physics)
Solar energy
Three dimensional models
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Summary:Solar updraft tower (SUT) is a viable option to produce electrical energy from solar energy. Extensive studies needed to estimate the flow parameters and analyse this set-up. A 3D numerical model is developed to analyse the flow parameters such as pressure, temperature and velocity of SUT plant. Effect of geometrical parameters such as chimney height and collector roof angle is studied numerically in this work. The diameter of absorber plate and chimney as 3.5 m and 0.6 m and the collector roof angle, chimney height and inlet gap as 30º, 6 m and 0.1 m, respectively, are selected for numerical simulation. A parametric study is performed for varying chimney heights from 3 to 8 m and collector roof angle 20º-35º with an increment of 5º each case. The airflow inside the SUT is turbulent, renormalization group (RNG) k-[epsilon] model is selected, and (discrete ordinates) DO model is incorporated for evaluation of radiation effect inside the domain. From the simulation results, it is concluded that when collector roof angle is increased, air velocity is increased and also air temperature is slightly dropped. It is found that there is 31% velocity enhancement when the chimney height is increased from 3 to 8 m.
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-018-7749-y