Will the circulating hot ethanol enter the expansion tank?
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As shown in the schematic diagram below, a small thermal cycling heating system is to be constructed, with hot ethanol as the circulating medium (heated by hot water). The pressure at the outlet of the circulation pump is 3 kg. The heat medium is connected to the expansion tank through an expansion tube. I would like to ask whether the heat medium will flow in large quantities into the expansion tank via this expansion tube
Even if it does enter, there’s still an overflow pipe, so it has no impact on operational safety
Under normal operation, it is required that the level in the expansion tank remain constant.
The circulation pump is constantly in operation, so it’s unlikely that a large amount of ethylene glycol will enter the expansion tank. Additionally, since it’s a closed-loop system, the head pressure required by the circulation pump can be reduced; there’s no need to set it too high
Under stable operating conditions, there is little exchange of the medium inside the expansion vessel with the pipeline. However, during the heating process, a portion of the expanded gas enters the expansion tank, but not much.
How should the head of the circulation pump be considered? If the circulating hydraulic head coming from the reactor is higher than the static head of the liquid column within the expansion tank (ρgH), won’t a large amount of circulating ethanol flow into the expansion tank?