While this basic refrigeration cycle is used in millions of systems worldwide, industrial refrigeration systems often are significantly more complicated. There are a number of reasons for the added complexity. One factor is that, in industrial applications, large loads with long operating hours can justify the added complexity to improve operating performance. Also, cooling is often required at very low temperatures or at several differing temperatures. Industrial systems often employ multistage cooling where several compressors and multiple evaporators are utilized.

Industrial refrigeration systems often include a number of other vessels and auxiliary equipment serving various purposes. Liquid receivers are vessels that are located downstream of condensers and serve to receive and store the refrigerant charge. A suction accumulator or a suction trap is located between the low-stage evaporator and compressor, and prevents liquid refrigerant from entering the compressor. Low-pressure receivers are used in liquid overfeed systems to separate liquid from vapor and as storage. Suction accumulators and low-pressure receivers will typically operate at temperatures below ambient, and will require insulation to minimize condensation and limit parasitic heat gains.

Industrial refrigeration systems are an important segment of the air-conditioning and refrigeration industry. The systems are often large, complicated, and utilize large quantities of insulation. Additional information on these systems may be found in the references.

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