Assessment of Solar Power Tower System for Closed Space Ventilation: Numerical Investigation

The small closed space demand increase as a secondary station for commercial production. It leads to the need to improve these stations by enhancing proper self-ventilation and daylighting. The natural air ventilation system significantly works in small closed stations; this system can be improved using different thermal storage materials in the solar collector and integrated approaches in closed space for heating, ventilation, and space conditioning. Three models were simulated; the first model is the normal model (single-pass roof solar collector). The second and third models are solar tower systems; chimney height is 6 m, with external collectors using water and wax containers. Results demonstrated that increasing thermal absorbance (wax container) of the thermal storage unit in the solar collector system enhances system performance. The mean percentage of increasing air velocity between the numerical results of Model-A and Model-B from the standard model is 18.9 % and 11.4%, respectively. Also, the mean percentage of increasing the collector's efficiency between Model-A and Model-B's numerical results from the normal model is 8.4 % and 5.3%, respectively.