Originally Posted by eccsynd
Great job on the PID tuning. Can you post your PID coefficients? I'm sure that other BCS users with similar setups would find them beneficial as a starting point for their own systems.
PID Sample time is .1 sec
PID Differential temp. is 0F
This is giving me 2-5F overshoots at the RIMS outlet, mainly because when you stop firing a 4500W element, you have residual heat coming from that element. Basically I have a really fast acting process and one which still produces heat after it is stopped... so I am surprised I have gotten it nailed down this well.
However, using data log I can watch the overshoots over time and the MLT temp. over time and the MLT temp. is steady +/-.25F. Data logging ROCKS!!
Now, this testing has led me to another design for my new RIMS heaters.
(2) HWD 5500W elements for HOT WATER HEATING
(1) LWD 4500W element run on 120VAC for RIMS heating (read less residual!!)
With less residual from a low wattage ULWD element during simple RIMS operation I can get the tolerances even tighter.
When heating sparge water or strike it will utilize the (2) HWD 5500W elements
Yes, a triple element RIMS baby.
Optimized for both RIMS operation and water heating.