Drake371
Member
I have about 25ft of 1/2in SS coiled down to the outside diam of my ball lock keg, my question is how far apart should each coil be?
drake
drake
GearBeer said:I would make sure that there is some gap. The increased surface area will improve your heat transfer and improve the system response.
. Wouldn't it have been easier to whirlpool the top recirculating water. Theoretically having the water return in the same downward direction of the coilit isn't just surface area, it is flow over that surface area. With the tube squished together, the flow near the surface of the coil will be less, so less heat transfer. Even stirring or recirculating with a pump won't fix it completely. A small gap gives the opportunity for more useful water agitation (plus, more surface area).
I have a stout tanks HLT with their HERMS coil, and I had to make a special recirculation return arm that shoots water down the inside and outside of the coil, to alleviate this problem. I was getting a huge delta in temperature in the HLT even recircing at 10-12 GPM. A coil with gaps will help this problem.
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