The terms 'Hollow' and 'Semi-Solid' refer to which component of an oil burner?

The terms 'Hollow' and 'Semi-Solid' specifically refer to the configuration of the nozzle in an oil burner. The nozzle is a critical component that atomizes the fuel oil before it enters the combustion chamber, ensuring efficient mixing with air for optimal combustion.

A hollow nozzle has a central opening that allows the fuel to be sprayed in a fine mist, promoting better mixing with air and enhancing combustion efficiency. On the other hand, a semi-solid nozzle may have characteristics that allow it to control the flow and atomization of the fuel more precisely. This ability to define fuel spray patterns directly affects the burner’s performance, impacting heat output, emissions, and fuel consumption.

Therefore, understanding the design and function of nozzles, including the terms 'Hollow' and 'Semi-Solid,' is crucial for HVAC professionals, as it directly impacts the efficiency and performance of oil burners in heating systems.