ABSTRACT
Gas rotating between the fan blades is compressed in the fan scroll, which increases the static pressure. As the liquid is compressed by the piston, the higher pressure forces it through discharge valves to the pump outlet. If a pressure difference is required between two points in a system, a prime mover such as a fan, pump, or compressor is usually used to provide the necessary pressure and/or flow impetus. Compressors operate in a similar fashion to pumps and have the same classifications: rotary, reciprocating, and centrifugal. As the piston retracts, the next batch of low-pressure liquid is drawn into the cylinder and the cycle is repeated. It is important to note that because of the size of nanoparticles, their behavior in a ventilation system will approach that of a gas. Thus, it is safe to conclude that the ventilation procedures and calculations that are currently employed in practice may be applied to nanoparticles.
