Heat exchanger in the exhaust gas flow for the recovery of waste heat. The hot exhaust gases are led through channels or pipes, at whose heated wall those gases are warmed, which are directed to the furnace. The wall, which transfers the heat, can consist of heat-resistant steel, cast iron or ceramic masses. Recuperators are installed in line after the heating and annealing furnaces; they improve their efficiency and increase the furnace temperature.

a heat exchanger that helps boost the efficiency of some gas turbine engines

A system that can transfer heat from one flow to another. It is used to heat incoming airflow with exhaust heat from the outflow of a process

Same as Regenerator.