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Typical of three situations:
A valve has been placed in parallel with one side of a heat exchanger to divert flow around the heat exchanger, thereby reducing the amount of refrigerant entering the heat exchanger. On the other side, the temperature of a process flow is measured downstream of the heat exchanger to send a signal to the diverter valve on the opposite side.
It occurs to me that there could be very long delays between the change in valve position and a resultant change in temperature in the process gas/liquid. Stability of a closed loop in this situation could be difficult to obtain.
Any suggestions?
A valve has been placed in parallel with one side of a heat exchanger to divert flow around the heat exchanger, thereby reducing the amount of refrigerant entering the heat exchanger. On the other side, the temperature of a process flow is measured downstream of the heat exchanger to send a signal to the diverter valve on the opposite side.
It occurs to me that there could be very long delays between the change in valve position and a resultant change in temperature in the process gas/liquid. Stability of a closed loop in this situation could be difficult to obtain.
Any suggestions?