A design of bi-ejector refrigeration system was presented by the authors. In the system there are two ejectors: one is to suck refrigerant steam from evaporator and discharge to condenser, the other is a jet pump which pumps liquid refrigerant from condenser to generator. With numerical computation, the two aspects are investigated: (1) the flow characteristics of flow field in ejector. (2) the matching characteristics of the two ejectors. The simulation shows that the discharge pressure of jet-pump could be higher than that of motive steam with proper entrainment ratio. On the given refrigeration condition, the higher the generator pressure, the lower the entrainment ratio of steam-liquid ejector, but the entrainment ratio of steam-steam ejector is higher. With suitable matching parameters of two ejectors, the optimal COP of the system could be achieved.
Keywords. ejector; refrigeration; bi-ejector refrigeration system; entrainment ratio
How to cite this article
Shen, S., Qu, X., Zhang, B. and Li, H. (2004). 'Computational investigation on the performance and parameter matching of ejectors in bi-ejector refrigeration system'. SET Proceedings, 3, pp. 1-5. https://doi.org/10.65582/set.2004.007
