A mathematical model of a solar chimney

Thermal Storage Capacity and Night Ventilation Performance of a Solar Chimney Combined with Different PCMs

“…The radiative heat transfer coefficient between the absorber and glass cover has been obtained from [21] …”

Performance Characteristics of Modelled Tri-Wing Solar Chimney and Adaptation to Wood Drying

“…Since air buoyancy is proportional to the temperature difference, reduced heat losses and increased heat transfer rates will give a better performance. The atmospheric density decreases with increase in altitude; this effect restrains the height of chimney because the density of the air exiting from the chimney must always be less than the ambient air density [9]. If the density of air from the chimney is equal to the ambient air density, there will be stagnation in the flow, and if the chimney air density is further lessen, then the air backflow against the ambient will result, thereby resulting in local heat losses, which may stall buoyancy-induced forces.…”

“…The experimental setup was located at Nsukka, Nigeria, longitude 7° 23' 45" E and latitude 6°5 1' 24" N [18], and the data acquisition method was adopted from the works of [9]. Solar data readings were taken on 23rd November at the location for analytical purposes.…”

“…This theoretical study also reported an air change per hour with change in the coefficient of fluid (air) discharge. Ong, (2001) reported the mathematical model of a conventional vertical chimney which operates under the natural convention condition where the temperature of the air inside the chimney is warmer than outside. Shiv, et al, (2013) presented solar chimney as a solar air heater whose position may be vertical or horizontal, and according to the position, it could be regarded a part of a wall (in the form of Trombe wall) or a roof solar collector [10].…”

Energy Saving Evaluation of the Ventilated BIPV Walls

“…The location and function can: (i) continue the structure of a conventional chimney [4] (ii) be combined with exterior walls Setting a translucent panel at the outermost part of the building structure allows the solar radiation to penetrate, and then there will be an air channel between the exterior wall and the newly-set translucent panel. The sunshine can directly irradiate on the exterior wall, which makes the air around the exterior wall create a thermal buoyancy flow [5].…”