Final answer:
Recuperators, regenerators, and direct contact heat exchangers are indeed the main classes of heat exchangers.
Step-by-step explanation:
True or False. Recuperators, regenerators, and direct contact heat exchangers are the main classes of heat exchangers.
The statement is true. Recuperators, regenerators, and direct contact heat exchangers are indeed the main classes of heat exchangers.
A recuperator is a type of heat exchanger that transfers heat between two fluid streams, typically without mixing them. An example of a recuperator is a shell and tube heat exchanger.
A regenerator is a type of heat exchanger that uses a solid matrix, such as a honeycomb or a matrix of rotating disks, to store and transfer heat between two fluid streams. An example of a regenerator is a rotary regenerative heat exchanger.
A direct contact heat exchanger is a type of heat exchanger in which two fluid streams come into direct contact and transfer heat through mixing. An example of a direct contact heat exchanger is a cooling tower.