A large hotel in South India, with humid weather conditions was using 250 TR screw chillers for central air conditioning, and diesel boilers for hot water in the range of 45-52 °C. Chiller was using R134a refrigerant, with relatively low discharge temperatures (~65 °C). Specially designed double walled heat exchangers were built to recover heat energy from refrigerant, and generate hot water at zero cost.
- Double walled system – No fear of intermixing of refrigerant and water
- Safety bypass features incase of isolation of heat recovery system
- Rapid payback – money was recovered within few months of installation