This obviously depends on a lot, but any sort of general indication would help me here. I can't post any more detail.
Industrial cooling loop, water pumped round between a shell/tube exchanger and a cooling tower. The exit temperature of the process side of the STE is to be controlled.
The process design we've been provided (which is locked in) has two handles for the cooling adjustment: (1) a bypass valve around the tower and (2) a control valve in the cooling water loop itself, adjusting the flow through the STE / tower. The process sizing looks reasonable, ie, not under or over. I'm wondering which of these two handles is likely to be the stronger one, and which should be used for the main control (or maybe both).
I recognise that reams could be written here, the two handles are certainly going to interact, will be nonlinear to a degree and will depend on many factors.