ABSTRACT
This entry provides an overview of the design and operation of heat exchangers and heat pipes. Different types of heat exchangers are discussed, including concentric-tube, cross-flow, and shell-and-tube heat exchangers. Methods of analysis are briefly discussed, with correction and geometrical factors for complex configurations. Condensers and evaporators are described in more detail. Heat pipes are additional types of heat exchange devices that use a porous wick material in a tube structure. The performance and operation of heat pipes are discussed. Limitations of wicking, entrainment, sonic, and boiling conditions are outlined, with respect to their effects on heat pipe performance.
