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Homebrewing Equipment

Double the walls: double the pleasure

By:Gareth Davies
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MASHED ISSUE 6

Just when you thought Dark Farm couldn’t improve on their 5L mini kegs they only went and added another layer to them. Single wall no more; welcome to the new double walled 5L keg!

There’s nothing worse than a warm beer. To solve this global problem the new Dark Farm double walled insulated kegs give you that extra layer to keep your beer cooler for hours longer.

How does it work? Having two walls prevents heat being transferred from the inside to the outside by conduction and convection. With very little air between the walls, there is almost no transfer of heat from the inner wall to the outer wall by convection. Conduction can only occur at the points where the two walls meet: at the top and the supports at the bottom. 

Simple, right? So, to prove their point, this experiment was carried out in their very non official lab. As Dark Farm Founder Gareth Davies explains ‘basically, we filled a single walled keg and a double walled keg with the same beer and stuck a thermometer in each. Then we timed the results. Promise we didn’t drink any, we’re professionals!’ 

Here are the results:


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