Originally Posted by augiedoggy
Yes but arent the camco elements ultra low watt density? is your element silver or dark gray? the dark gray ones are ulwd and are much less likely to scortch the wort. The regular element surface is hotter than the ulwd making it easy to burn if the wort isnt constantly moving over the surface.
I will never go back to fire again if I can help it... I can control the boil perfectly with my electric setup as well as the rate of evaporation.. plus I brew in my house in a spare bedroom.... Not a smart Idea with an outdoor propane burner.. temps make a huge difference in the beer... if the boil is too vigouruos you get too much evap not vigorous enough and not enough hop utilization.
The 'dark gray' I believe you are referring to is not indicative of watt density but is caused by annealing of the incoloy stainless, to make it pliable for bending. Camco uses a 'full anneal' process which send the entire element through an oven with an atmosphere. This anneals the entire assembly instead of just the bending area (like with BREWHA elements). The annealing creates an oxidized layer of something similar to chromium oxide or nickel oxide (although I am told the makeup of this layer is different than the spot anneal which is done in regular air). It also makes the surface slightly less smooth so that it is slightly harder to clean. For applications where cleaning the element between uses is desirable, this layer is not helpful and is better if minimized. The perfectly shiny elements are often coated after bending.
Watt density is determined by the total output, relative to the surface area of the heating sheath (length of the heating element*diameter*3.14). Take the total output of the heating element (at a given voltage) and divide it by its surface area. BREWHA elements are designed to be as low as, or lower watt density than the ULWD Camco elements.