Secondary heat recovery systems capture excess energy in the exhaust stream of processes or oxidizers. On the surface, heat recovery makes good sense: Capture the waste energy and repurpose it rather than throwing it out an exhaust stack. The concept sounds relatively straightforward. As with most things, however, the proof lies in the details.
The decision to install heat recovery typically is a question of dollars and cents. The economic case for heat recovery can be a multi-faceted formula involving energy savings as well as the costs for equipment, installation, operation and maintenance. From a technical standpoint, here are five questions that should be considered: