Abstract: The thermal performance of a double-effect parallel-flow LiBr-H2O absorption refrigeration system under dual-heat mode of operation was theoretically studied, and the influence of the external heat capacity variation of the low pressure generator and operation parameters on the performance of the system was analyzed. Results show that under dual-heat mode of operation, the flux of solution should be adjusted with the variation of the external heat capacity of the low pressure generator to ensure the normal operation of the system; an increase in external heat capacity of the low pressure generator leads to a better effect of energy-saving and a lower operating cost; the adjustable range of solution distribution ratio changes with the variation of operating conditions.

Key words: double-effect parallel-flow LiBr-H2O absorption refrigeration system, dual-heat mode of operation, flux adjustment, performance