Thermal Conductivity

Summary

A heat exchanger is a device built for efficient heat transfer from one fluid to another, whether the fluids are separated by a solid wall so that they never mix, or the fluids are directly contacted. They are widely used in refrigeration, air conditioning, space heating, power production, and chemical processing. One common example of a heat exchanger is the radiator in a car, in which the flow of air over the radiator surface.

Heat exchangers may be classified according to their flow arrangement. In parallel-flow heat exchangers, the two fluids enter the exchanger at the same end, and travel in parallel to one another to the other side. In counter-flow heat exchangers the fluids enter the exchanger from opposite ends. The counter current design is most efficient, in that it can transfer the most heat. In a cross-flow heat exchanger, the fluids travel roughly perpendicular to one another through the exchanger.

Object of the experiment:

Characteristics of the equipment:

The double pipe heat exchangers are quite simple exchangers to analyse.

Double-pipe heat exchangers are inexpensive and easily maintained. They are primarily for low flow rates and are well adapted to high temperature and high pressure due to their relatively small diameters. Because of the small amount of heat transfer surface per section, double-pipe heat exchangers are generally found in small total-surface requirement applications.

Double-pipe heat exchangers are inexpensive and easily maintained. They are primarily for low flow rates and are well adapted to high temperature and high pressure due to their relatively small diameters. Because of the small amount of heat-transfer surface per section, double-pipe heat exchangers are generally found in small total-surface requirement applications.

The exchanger has been piped to permit counter and parallel flow operation. The tube outer diameter is 15 mm with a wall thickness of 0.7 mm. The shell...