What does dynamic resistance refer to in a draft system?

Dynamic resistance in a draft system specifically refers to the resistance encountered from the system hardware, particularly the draft tubing. This resistance is crucial because it affects the flow of beer from the keg to the tap. The diameter and length of the tubing, as well as the type of materials used, all contribute to the overall resistance. Understanding dynamic resistance is essential for assessing how efficiently beer moves through the system and ensuring that the correct serving pressure is applied to maintain optimal beer quality and carbonation levels.

In contrast, resistance from external temperatures, while impactful on beer serving quality, does not directly pertain to the mechanical aspects of the draft system itself. Similarly, beer carbonation affects how the beer is poured but does not categorize the resistance within the physical draft structure. Lastly, keg size impacts overall beer volume and possibly the pressures involved but is not a direct factor in the dynamic resistance related specifically to the draft hardware. Understanding where the resistance in a draft system comes from helps in designing and troubleshooting a draft setup for optimal performance.