Ljubljana, Slovenia

Recovering engine heat to produce cooling

An engine that generates electricity converts only about 40% of its fuel energy into electricity. The rest is lost, mainly as heat. For example, from 10 MW of fuel, only 4 MW becomes electricity.

In Ljubljana, a BROAD absorption chiller recovers this heat to produce chilled water. It uses both the exhaust gas of the largest engine and the jacket water of three engines. The fuel is used more efficiently and the energy cost of the whole system goes down.

• Unit type: multi-energy absorption chiller × 1 unit
• Cooling capacity: 234 kW
• Heat sources: exhaust gas from one engine (inlet 430 °C, outlet 160 °C) and jacket water from 3 engines (inlet 90 °C, outlet 80 °C)
• Cooling water: cooling tower (inlet 25.5 °C, outlet 31 °C)
• Chilled water: supply 8 °C, return 13 °C
• Use: pharmaceutical warehouse
• Equipment: in-tube exhaust design for easier maintenance