Furnace Exhaust Heat Recovery

In some cases such as industrial furnaces efficiency improvements resulting from waste heat recovery can improve energy efficiency by 10 to as much as 50.

Furnace exhaust heat recovery. Use of regenerative burners for reheating furnaces can provide significant energy savings. Captured and reused waste heat is an emission free substitute for costly purchased fuels or electricity. A recuperator is a special purpose counter flow energy recovery heat exchanger positioned within the supply and exhaust air streams of an air handling system or in the exhaust gases of an industrial process in order to recover the waste heat. Significant efficiency improvements can be made even on furnaces that operate with properly tuned ratio and temperature controls.

This heat recovery process is accomplished in such a way that the stale air is never mixed with the fresh air. This unit is equipped with a heat recovery core specifically designed to reduce ventilation costs by recovering the heat energy from the exhaust air and using that same heat energy to warm the fresh air being supplied. A recuperator is the most widely used heat recovery device. It is a gas to gas heat exchanger placed on the stack of the furnace that preheats incoming air with exhaust gas.

The heat recovery system is connected to the off gas treatment system of the melting electric furnace. Designs rely on tubes or plates to transfer heat from the exhaust gas to the combustion air and keep the streams from mixing. Also if i try to steal the exhaust heat am i going to have to come up with some sort of induced draft fan. I know they sell heat recovery units for wood stoves with a 6 pipe i wonder if i could use one of those with my gas appiances.

The recovered energy reduces the net power consumption allowing significant co 2 reduction. There are four widely used methods.