Arrangement for emergency cooling in air conditioning systems, especially for machine rooms, uses plate heat exchangers provided for free cooling mode for emergency cooling

摘要

The arrangement has a multi-line refrigerant supply of at least three lines and at least one more refrigeration unit. The minimum number of circulation air conditioning devices per room unit corresponds to the minimum number of lines. One plate heat exchanger is used per room unit and each refrigeration unit is normally associated with a re-cooling mechanism. Plate heat exchangers provided for free cooling mode are used for emergency cooling. The arrangement has a multi-line refrigerant supply of at least three lines and at least one more refrigeration unit (KM). The minimum number of circulation air conditioning devices (ULK) per room unit corresponds to the minimum number of lines. One plate heat exchanger (PWT) is used per room unit and each refrigeration unit is normally associated with a re-cooling mechanism (RKW). In a failure situation the re-cooling mechanisms or refrigeration machines are connected together so that a refrigeration machine is changed over to another re-cooling mechanism or a re-cooling mechanism can be started by several different refrigeration machines via short circuit paths or ring lines. Plate heat exchangers provided for free cooling mode are used for emergency cooling.