Vane compressors operate based on which principle?

Vane compressors operate by utilizing the principle of varying the area during both intake and compression processes. As the vanes move within the rotating mechanism, the area available for the intake of air or gas increases, allowing more fluid to enter the chamber. Once the vanes rotate beyond a certain point, this area begins to decrease, effectively compressing the gas or air into a smaller volume. This process creates a cycle of intake and then compression, maximizing efficiency in handling the gas or air.

The option highlighting increasing area on intake and decreasing area on compression accurately captures this operational characteristic of vane compressors, which is fundamental to their design and functionality.