Improving natural ventilation in combined solar house with solar chimney and solar water collector

Abstract

AbstractThe paper studies a combined solar house with a solar chimney and a solar water collector. Theoretical analyses were carried out to investigate natural ventilation in the solar house, compared with that in the individual chimney ventilation system under the same conditions. It was found that the proposed combined ventilation system improved the ventilation. When the mean solar radiation during a day from 8:00 to 18:00 h is 550 W m−2, the mean airflow rate in the combined ventilation system reaches 0·32 m s−1, which is 18·5% higher than that (0·27 m s−1) in the individual chimney ventilation system under the same conditions. Furthermore, it was found that the effect of night ventilation on the combined solar house is better, although less energy is drawn out from the room by comparing chimney airflow temperatures and rates when the dampers are open after 18:00 h, with those when the dampers are open day and night. It can be vital to housing conditions and factories which work during the night to cr...