An exergy balance analysis was made for the novel bi-ejector refrigeration system under a given operating condition. The exergy efficiency and the total exergy losses of the system

the exergy loss rate and exergy efficiency of each component were calculated

and the effects of generator temperature and evaporation temperature on the exergy efficiency and the total exergy losses of the system were discussed. The results indicated that the exergy loss in the solar collector was the maximum and its exergy loss rate was 91%. The second largest exergy loss was in the gas ejector with an exergy loss rate of 5%. As the other conditions were fixed

there exited an optimal generator temperature

at which exergy efficiency was the highest and the total losses were the lowest. The total energy efficiency and exergy efficiency respectively varied in the ranges of 10%—18% and 0.3%—0.65% for generator temperature 75—120℃

evaporation temperature 7—15℃ and condensation temperature 35℃.