Compact Energy Efficient Low Charge Ammonia Refrigeration units (CLAUS)

The objective of the project is to develop a novel energy efficient chiller and heat pump unit using the most efficient refrigerant found today, i.e. ammonia, in the capacity range from 20 to 200 kW. Ammonia has a long and successful history in industrial refrigeration systems but is not really used in ammonia based systems of lower capacity than approximately 200 kW. The developed chiller/heat pump unit will be installed in real life situation to compare the concept with a traditional HFC unit.

• Develop chiller and heat pump concept in medium 20-200 kW cooling capacity range.
• Using natural refrigerant – ammonia.
• Compact unit - lower price – lower charge.
• Low specific charge 0,05 kg/kW.
• Similar price as HFC units.
• Without or with very low suction superheat.
• Chiller/heat pump unit energy savings (23,5%/28,5%) in full load, (31,5%/33,5%) in part load.
• Encapsulate charge inside the unit in case of leakage.
• Optimized total control at all time.