A theoretical study on a novel bi-ejector refrigeration cycle

In this paper, a new bi-ejector refrigeration cycle is presented, in which the mechanical pump of a single ejector refrigeration cycle is replaced by a vapor–liquid ejector. Thus in the bi-ejector refrigeration cycle, no electricity is required. The relation between the vapor–liquid ejector performance and operation parameters is studied. Simulation on the system COP, the generating temperature and the condensing temperature is provided. The vapor–liquid ejector entrainment ratio is relatively high, so the system performance remains competitive although a part of motive vapor is used to drive the vapor–liquid ejector, without counting the saving of electricity.