Question

recovery of waste heat from hot fluid to fluid is called​

Answer 1

$\huge\fbox\green{answer:-}$

What is the principle of 'recuperators'? The recuperator is a waste heat recovery device or a heat exchanger between waste gases and the air to be pre-heated. Heat exchange takes place between the flue gases and the air through metallic or ceramic walls.

Answer 2

Answer:

What is the principle of 'recuperators'? The recuperator is a waste heat recovery device or a heat exchanger between waste gases and the air to be pre-heated. Heat exchange takes place between the flue gases and the air through metallic or ceramic walls.

hope it helps you................