Mash tun strike temperature

[keith1664]

Cheers for all the replies. Yeah I used strike calculators when I BIAB. The problem is definitely the additional mass of the new tun. Just looking for a ballpark increase over the value stated by the calculator

If you add the liquor/water to the mash tun (and let it stabilise) before adding the grain, the calculator's target strike temperature will be correct and should not need adjusting. The strike temperature is the target 'after' the mash tun and liquor have stabilised, which is then only cooled by the grain (to reach mash temperature). It is therefore independent of the mash tun used.

The only thing you should need to do is increase the initial temperature of your liquor in order that you can still get the calculator's strike temperature (when the metal tun has taken more heat out). Trying to account for this on the fly by using a higher than calculated strike temperature is much harder to gauge.

(Thats unless you are underletting or similar; situations where the liquor meets the tun and grain in the same step are more complicated).

Should have said I under let. Ended up filling the mash tun with over heated water. Took a note of the temp drop. Cooled with ice to strike temp, emptied water back into hlt, added grain and then pumped water back in from beneath. What a farce

I underlet into a thermopot. Experience has taught me that the water needs to be around 3c more than Brewmate tells me. Usually around 79c (40L brewlength).

[Fil]

@Sura what size is your tun, and is its volume relevant to your 20l temp drop test volume,
I have to try your calculation out, and have a 80l tun and somehow think 20l may not be a sufficient volume for a valid temp drop test with a 80l tun??

[Sura]

@Sura what size is your tun, and is its volume relevant to your 20l temp drop test volume,
I have to try your calculation out, and have a 80l tun and somehow think 20l may not be a sufficient volume for a valid temp drop test with a 80l tun??

Erm, this was just an example.... just now i have a plastik tun. There isn´t a relevant thermic mass ...

But i just looked in my brewbook: My 38,5l stainless steel Thermoport, with the lautering spiral included, has had 1.8kg thermic mass. I used it several months ago.

[Fil]

ok i will fill to an average mashlevel with test water in that case as that should be representative.

Cheers