The solar air heating system is a custom engineered solution containing internal and external components. It uses solar energy to heat and ventilate indoor spaces in new and retrofit applications. The solar air heating system can aslo be used to produce hot air required for the manufacturing process and for agricultural crop drying applications.
The system technology can be designed in a variety of ways, depending on the building's energy requirements and the client's objectives. The most visible component of the system is its exterior metal cladding, encompassing the system's interior components which accumulate the hot air and conduct it inside the building. Specially perforated collector panels are installed in a short space from a south facing wall creating air cavity. The solar air heating system may also include some exterior glazing for higher temperature rises. The metal cladding is heated by the solar radiation from the sun and ventilation fan create negative pressure in the air cavity drawing the hot air through the panel perforations. The ventilator is designed to maintain a consistent draw and pressure across the entire wall surface and ensures that the cooler air beyond the heated boundary layer is not introduced into the air stream. The air is generally taken off the top of the south wall. The heated air is then ducted into the building via a connection to the HVAC intake. Since the air entering in the air handler has already been preheated anywhere from 16-38C on a sunny day(less on a cloudy day). This solar heating reduces the energy load on the conventional heater. The heated fresh air is then distributed into the building through the existing HVAC system or with separate air fans or perforated ducting. Source : Solar Wall