Is single thermometer workable when fermenter has two independent glycol cooling zones?
How does a single t well control 2 different zones?
I was thinking the reason we install two sets of valves is for better and separate control of the 2 zones.
Here I explain the controlling way in below:
Each fermenter/uni tank has two independent glycol jacket, and each glycol jacket has it's own glycol inlet and outlet, this is no question.
Each glycol inlet will be mounted with a solenoid valve, which means each fermenter/unit tank has two solenoid valves, this is also no question.
If with single thermometer:
We set for example 41F temperature limitaton for one of the conical fermenter on the control panel.
When the tank is full, the single thermometer measure the temperature and if it is over 41F, the thermometer transfers the data to the control panel, and the control panel command the two solenoid valves to open and let the glycol flow in.
When the tank is not full, we screw the button of the upper solenoid valve on the control panel to the 'manual' work status, and still keep the lower solenoid valve button (mounted on the control panel) at the 'auto' work status,then the single thermometer transfer the actual temperature to the control panel, and the control panel will only command the lower solenoid valve to open to let the glycol in.
This mainly considering this two reasons:
1.The 1000L or 2000L fermentation tanks is not big, here almost is no temperature difference inside the tank. So one single thermometer will measure the temperature accurately.
If with two temperature thermometers, here will be two temperatures on the control panel for each fermenter, actually the two temperatures are the same for such small fermenter.
2. If each fermentor is with two temperature thermowell, which means two sets of complete temperature controller, the cost will be higher.
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