1)waste of package source material
2) burden increase of cost of transport
3)environmental pollution increase
packaging>
▶9 out of 15 gift set products has exceeded packaging space ratio
▶waste of resources + environmental pollution+ Total cost↑
▶Difficult to recycle due to the use of complex materials of fabric, synthetic resins and paper.
Keff, Km, Kp : the effective thermal conductivities of the composite,
Metal matrix, Particles
φp : the volume fraction of reinforcements
a : the diameter of the reinforcement
- hc : the boundary conductivity.
Advantage
The air travels across the short
length of the fins laterally, rather than longitudinally down
the long length.
Focused on placing