A tube bundle heat exchanger with baffles is disclosed wherein a tube bundle is housed within  an inner casing which is acted upon from both the inside and the outside by a heating medium

 

A multiple tube bundle heat exchanger includes axially opposite tube plates, a housing, and  a plurality of tube bundles disposed between the tube plates. Each of the tube bundles is  an independent tube bundle subassembly forming an integral unit having at least one  heat exchanger tube with two axial tube ends.