Abstract: In at least some implementations, a shell and plate heat exchanger includes a shell and a core. The shell defines at least part of an interior and has a lid and a main body to which the lid is coupled in assembly. The core may be received in the interior and have a plurality of modules. Each module may include a plurality of cassettes of heat transfer plates, and the modules may be releasably coupled together to enable nondestructive decoupling of at least one module from the core. To permit nondestructive removal of the lid from the main body, the lid and main body may be releasable coupled together.

Abstract: In at least some implementations, a heat exchanger includes a core and a shell. The core may have a periphery and a plurality of plates with a plurality of passages interleaved therebetween, a portion of the passages extending and open to the periphery of the core. The shell includes a plurality of panels releasably connected together to define a pressure vessel in which the core is received in assembly, and the shell is adapted to be at least partially disassembled to provided access to the core and enable cleaning of the passages and the plates, or to enable repair or replacement of the core. The shell also is adapted to be reassembled into a pressure vessel with the core inside for further use of the heat exchanger.