
That vapour is very different from the vapour produced by the primary boiler AT THAT MOMENT IN TIME. The end result is a vapour produced by the thumper. So the vapour released from the thumper charge, mixes with the vapour from the boiler (that just sneaked through the thumper charge).

That means the two vapour streams ALSO have different compositions. Importantly the composition of the liquid in the thumper is different to the composition of the liquid in the primary boiler. Some of this is from agitation by the vapour bubbling through it, and some is from the thumper charge actually boiling. The thumper charge has heated up enough that it actually starts to produce its own vapour. So some of the vapour from the boiler gets through the thumper - but the composition has changed - it contains more of the lower boiling point headsy components. NONE of them do anything absolute, there is no 100% condensation, just tendencies. Some others are likely to get through the liquid. Some of them are going to tend to condense into liquid because their boiling point is still higher than the liquid temperature. Your boiler is producing a mixture of volatile vapours, these now hit a hot liquid. It is most likely a lot quieter, expecially if your vapour injector has been modified to include a diffuser to make smaller bubbles. Your boiler is now warmed up and contains a higher volume of charge. This is caused by the violently collapsing bubbles. The temperature also increases, because the condensing vapour releases energy. The volume of the thumper charge increases. Result is that virtually all of these vapours will condense into the thumper charge. These all have a boiling point higher than the temperature of the thumper charge. This is a mixture of different volatiles determined by the contents of the boiler charge. Your primary boiler starts producing vapour. Add enough plain water to the thumper to cover the end of the vapour injector. You really do need to think about what a thumper does in phases, because it actually does different things at different points in the run. Naturally what actually occurs, happens in phases, and is 'not quite so simple' as stated just above.

Yes, a thumper is a true parasitic boiler, and it is heated by the primary boiler. Simply put there is a mass and energy transfer out of the primary boiler and into the secondary boiler - the thumper. Lets also leave what you put into the thumper to start with to later. Either to increase, or to decrease the flavour, but we can get to that later. The real purpose often tends to be flavour modification. Sorry folks but it just isn't acurate.Īdmitedly they will do that, but in many cases it is incidental.

Its just that this seems to have been latched onto as the main reason for using one. OK lets open a discussion by throwing in a hand grenade.ĭespite what you may have heard previously, many thumpers are not actually used to increase the ABV of the product.
