Passive ventilation for building not subjected to solar radiation

Abstract

Some small-height buildings are not exposed to direct solar radiation due to shading from neighboring buildings. Therefore, for these buildings to be ventilated naturally, it was necessary to develop a method using a thermal chimney. This is done by using hot water resulting from the solar heater at the top of the building to heat the base of the chimney instead of direct solar radiation. In this paper, the solar chimney system used to generate power, using some modifications, to be used in ventilation operations is investigated. The effect of different variables on the airflow rate inside the chimney ventilation air drawn was studied. From the experimental result, the ventilation air flow rate increase with the chimney height and diameter. Also, the increase of heated plate area and the heater capacity increases the ventilation air flow rate. Increasing the inlet air gap thickness decreases the ventilation air. For the divergent chimney, the ventilation air increases with the increase of the conical angle.

HIGHLIGHTS

1. The main objective of this paper is to make ventilation system to building not subjected to direct solar radiation

2. Investigation the natural ventilation using thermal chimney

3. The effect of chimney height and diameter of the ventilation rate are discussed.

4. Investigating the effect of inlet air gap thickness, base plate area and cone angle on ventilation rate.

5. Empirical correlations describe the relation between ventilation rate and other parameter has been concluded.

Keywords:

• Thermal chimney
• ventilation air
• straight and divergent chimney
• configurations

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Notes on contributors

Mohamed A. Sultan

Mohamed A. Sultan, PhD, is an Associated Professor at Future Higher Institute of Engineering and Technology, Egypt.

Ahmed A. Sultan

Ahmed A. Sultan, PhD, is Full Professor at Mansoura Faculty of Engineering, Egypt.