Which heat exchanger consists of a pack of corrugated metal plates with portholes for the passage of the two fluids?

• A. Plate Type
• B. Shell and Tube
• C. Harrison Strut-Type
• D. Plate and Plate

Answer: (A)

This describes a plate-type heat exchanger. It’s built from a stack of corrugated metal plates with ports (portholes) that feed the two fluids into separate, adjacent channels. The fluids flow through alternating channels between the plates, so they transfer heat across the plate surfaces but do not mix. The corrugations create turbulence and a large heat-transfer area in a compact form, which is the hallmark of the plate design.

Shell-and-tube exchangers use a bundle of tubes inside a shell, not a plate stack, so they don’t match this description. Harrison Strut-Type refers to a different structural or mounting concept and isn’t defined by a plate-pack arrangement. Plate and Plate isn’t a standard designation for this configuration.