Influence of ejectors on the selection of compressors in carbon dioxide booster systems.

In carbon dioxide booster systems ejectors can now take over a part of the job previously done only by compressors, creating certain pressure lifts. This gives extra options for designing energy efficient refrigeration systems. The influence on the operating conditions of the compressors in the system is shown in examples, by varying load conditions in a warm climate. The chosen system includes medium and low temperature load in a supermarket installation. The impact of the ejectors and the optimum efficiency configuration are discussed. The demands for the compressor selection and application are developed.