I need to distill water. Vapor compressors are the best choice. However, difficult to find small scale vapor compressor. I am exploring the feasibility of rotary screw compressor used in refrigeration. This is small scale so issues of condensation can be handled manually if needed.
Alternative is to buy a centrifugal impeller (customized for vapor compressor) and cast the casing using silicone. Casting a centrifugal compressor will require more expertise and work. 3D printing is an option but not willing to risk the money without adequate knowledge.
Appreciate the assistance.