Writing differences in a Contrast Chart

Types of Heat Exchangers

Double-pipe

Type

Plate and frame

Shell-and-tube

Compact

A heat exchanger that contains many tubes packed in a shell with their axes parallel to that of the shell.

A heat exchanger that consists of a series of plates with corrugated flat flow passages.

A heat exchanger that consists of two concentric pipes of different diameters.

A heat exchanger that realizes a large heat transfer surface area per unit volume.

Definition

One fluid flows through the smaller pipe while the other fluid flows through the annular space between the two pipes.

They achieve high heat transfer rates between two fluids in a small volume, and strict limitations.

Plate heat exchangers can grow with increasing demand for heat transfer, mounting more plates.

They are classified according to the number of shell and tube passes involved.

Main characteristics

Cross-flow (unmixed and mixed flow). The two fluids move perpendicular to each other. Unmixed flow. The plate fins force the fluid to flow through a particular interfin spacing and prevent it from moving in the transverse direction.

One fluid flows inside the tubes while the other fluid flows outside the tubes through the shell.

The hot and cold fluids flow in alternate passages.

Parallel flow. The hot and cold fluids enter at the same end and move in the same direction. Counter flow. The hot and cold fluids enter at opposite ends and flow in opposite directions.

Flow arrangements

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