Shell-side heat transfer enhancement

A device for distributing flow through a shell side of a shell-and-tube heat exchanger, the device comprising:

• a shell-side flow distributor, the shell-side flow distributor configured to direct flow through all zones of a tube-bundle positioned in the shell, the shell-side flow distributor comprising:
• an inlet flow distributor, the inlet flow distributor configured to direct flow from an inlet nozzle to all zones of the tube-bundle, the inlet flow distributor comprising:
• an inlet distributor plate positioned proximate to the inlet nozzle in the shell side;
• and
• one or more window distributor plates, each window distributor plate comprising a window extending through a thickness of the window distributor plate, wherein the one or more window distributor plates are arranged in a vertical stack adjacent to the inlet distributor plate, wherein the size of each window in each window distributor plate is between 25% and 95% of the area of the window distributor plate and the size of the window distributor plate adjacent to the inlet distributor plate is between 25% and 95% of the area of the inlet distributor plate;
• and
• a flow guidance system, the flow guidance system disposed in the tube-bundle, wherein the flow guidance system comprises one or more flow guidance plates.