Improvement of Indoor Air Distribution by Utilizing Small Fans Powered by Solar Energy
A pilot-scale HVAC system is constructed to study the performance of air quality inside the comfort-zone when small fans are utilized to perform the air circulation. The research investigates the impact on energy consumption when the fan of the coil is eliminated from the fan coil unit (FCU). This would improve access to separate comfort zone controls and positively affect thermal comfort in those areas. In the study, the comfort room temperature variation is measured during 15 minutes in four cases, namely: all fans ON, all Fans OFF, 1-Fan ON, and 2-Fans ON. Optimization of the fan location that forces the zone temperature to stabilize around the set-point value in shorter time is recorded. Observation of the results indicates that the position of the fan does affect the time elapsed to reach the set-point as it affects the inside-air turbulence. Comparison of the four cases shows that the All-Fans-ON case cools down the zone temperature faster than other cases in entire space. In return, the space has fluctuated temperature in the cases of the 1-Fan and 2-Fans ON. This is due to the reduction in the turbulence intensity of the air near the Fan(s)-OFF region.