Greetings from Thailand, New and into Bimetallic Tubes

Greetings to  all the professionals, contractors, consultants and all the wonderful people out there. I am CY from Thailand and am new to this community, hope can provide and supply more information on my business product and at the same time, gather information here too.<br>I am producing a new type of tubes called Bimetallic tube in which two different pipe materials are combined into a single tube. A good example is a tube consisting of copper tube at the inner tube and aluminium tube at the outer tube. Any tips to share if this type of tubes  is useful in the HVAC industry? The aluminium fins in this case is directly contacting the outer tube of aluminium but the inner tube is still copper which can have greater heat exchange , maintaining its efficiency. Any feedback is appreciated. Thanks.<br>