Context
Several process users required controlled heat below 80 C but were supplied by steam. This made heat recovery impossible.
Architecture
A hot water loop, buffer and recovered heat source were integrated with backup heat. Controls prioritized recovered heat, then heat pump operation, then backup.
Lesson
The largest value came from reducing the required temperature and return temperature, not from the equipment alone.
Engineering FAQs
What was the main constraint?
Production continuity during conversion and the need to validate existing heat exchanger capacity at lower temperature difference.