The combination of higher chilled-liquid temperatures and intelligent fan and compressor control increases operation with free or partial free cooling Chiller free cooling has been around for decades, with systems historically limited to relatively low chilled-liquid temperatures (approximately 55°F and below) and operation during winter conditions. Recent trends in buildings and increased emphasis on energy conservation however, have sparked an evolution in chiller design, with expanded operation and a wider range of chilled-liquid temperatures.
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