Which type of compressor uses rotors for compression?

The correct choice is the screw compressor, which utilizes two rotors that intermesh to compress the gas. In a screw compressor, the rotors are designed to draw in the gas and then compress it as they rotate. This design allows for continuous and efficient operation, making it suitable for applications that require a steady flow of compressed air or gas.

Unlike other types of compressors, the screw compressor operates with minimal pulsation and is known for its durability and energy efficiency. The rotors in a screw compressor create a void that decreases in volume as the gas moves through, allowing for effective compression with minimal leakage.

In contrast, reciprocating compressors use pistons to compress gas, rotary vane compressors utilize sliding vanes within a circular rotor to trap and compress air, and scroll compressors rely on one spiral element orbiting another to compress gases. Each of these types operates differently from a screw compressor, which specifically targets gas compression through its rotor design.