copper tube bundle 3d model

1. The "Stacked Serpentine" Evaporator Your idea of stacking the tubes side-to-side (serpentine) rather than coiling them is essentially how modern high-efficiency heat exchangers work. By stacking them 3 or 4 layers deep, you create a "dense matrix." Surface Area Density: When you stack tubes this way, you can press aluminum "fins" onto them. This increases the surface area for the air to touch by roughly 1000% compared to just bare copper tubing. The "Tunnel" Effect: Enclosing this in a 3D-printed or insulated duct ensures 100% of the air pushed by your fan must pass through the cold matrix, preventing "bypass air" which kills efficiency. Dimensions: A 4-layer serpentine stack using 1/4" tubing can be as small as 4" x 4" x 2", yet provide enough cooling for your entire camper.