Analysis of a Hybrid System Solar Chimney-Air Soil Heat Exchanger for Natural Ventilation

Abstract:

The current study looks at a hybrid passive cooling system that combines a solar chimney with an earth-to-air heat exchanger (EAHE) usually called Canadian Well. Numerous experimental and numerical examinations with various applied radiation heat fluxes were carried out to evaluate its ability to cool a room. Glass temperature, wall temperature, air flow mean temperature, hourly rate of air exchange (ACH), outlet airflow velocity, and rate of air mass flow were determined experimentally and numerically, and validated against previously published experimental and analytical works. It was found that the chimney's operation is dependent on the radiation intensity. The EAHE has reduced the room's temperature by improving exchanges with the solar chimney. The comparison of experimental and numerical data for different radiation intensities reveals that the best diameter of the tube of the underground heat exchanger for the proper operation of our system is d = 0.04m. The efficiency of our system increases as the radiation increases, causing an increase in the temperature of the absorber, which influences the air temperature in the chimney.

• Periodical: International Journal of Engineering Research in Africa (Volume 66)
• Pages: 91-110
• DOI: https://doi.org/10.4028/p-3elgVg
• Online since: September 2023
• Authors: Billal Belfegas, Tahar Tayebi*, Salah Larbi
• Keywords: Heat Exchanger, Natural Ventilation, Solar Chimney

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