Can someone explain the benefit (aside from obvious thermal efficiency) of the tightly wound coils vs loosely wound ones?
Tightly wound: https://ae01.alicdn.com/kf/HTB1kRauIVXXXXaJaXXXq6xXFXXXT/50-Stainless-Steel-Coil-Tube-font-b-Immersion-b-font-Wort-Chiller-Beer-Cooler-Home-Beer.jpg...