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摘要

The main heat exchanger (1) operates between two fluid refrigerants (2) being evaporated and a heat transfer fluid e.g. water-alcohol mixt. (3) in two-phase flow. Each refrigeration loops includes a compressor, a condenser and plate or multi-tube heat exchanger. The mixt. is circulated continuously in a main closed circuit (3) by two pumps (41,42) in parallel, with five branch loops (7-11) each contg. an auxiliary pump (e.g. 71) and a sec. heat exchanger (72). The max. refrigerative power equals the prod. of the mass flow of heat transfer mixt., its energy density in the liq. state, and the temp. difference across the main heat exchanger.