SYSTEM FOR LIMITING PRESSURE DIFFERENCE IN DUAL COMPRESSOR CHILLER

PROBLEM TO BE SOLVED: To provide systems for limiting pressure differences in dual compressor chillers.SOLUTION: To achieve efficiency benefits of series flow chillers within a single unit, an evaporator 22 and/or a condenser 24 may be partitioned into separate chambers by a baffle 36, 38. A process fluid may then flow through one chamber of the evaporator and/or condenser prior to entering the other. This configuration creates a pressure differential between chambers which may reduce compressor head and result in larger chiller efficiency. However, to maintain the structural integrity of the evaporator and/or condenser baffle, a system for limiting the pressure differential may be employed. The system may include an evaporator pressure equalization valve 40, a common liquid line 32, or an equalizing line between separate liquid lines. Dual compressor chillers are operated by using these systems.