Company Launches Chiller That Uses Water as Refrigerant
NUREMBERG, Germany—A German company has launched what it says is the world’s first production-scale chiller using water as refrigerant. Efficient Energy announced its eChiller at the Chillventa exhibition in Germany this week. The company says that the key to using water as refrigerant is a micro-turbined centrifugal compressor that rotates at up to 90,000 rpm to increase pressure and temperature in the water leaving the evaporator. The resulting steam is condensed directly into the remaining cool water flow. Use of variable oil-free turbo compressors enables the eChiller’s cooling capacity to be adjusted continuously from 10% to 100%, while an intelligently controlled refrigerant circuit enables efficient modulation in response to changes in the ambient temperature. Among other touted features is a free-cooling function that doesn’t require an additional free-cooling circuit.
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