Hydrocarbon fluid, ejector refrigeration system

A refrigeration system comprising:

• a working fluid having a property such that entropy of the working fluid when in a saturated vapor state decreases as pressure decreases;
• a condenser located along a common fluid flow path for condensing the working fluid to a saturated liquid;
• a diverter located downstream of the condenser for diverting the working fluid into a primary fluid flow path and a secondary fluid flow path parallel to the primary fluid flow path;
• an expansion device located along the secondary fluid flow path for decreasing the pressure of the working fluid;
• an evaporator located along the secondary fluid flow path downstream of the expansion device for evaporating the working fluid;
• a boiler located on the primary fluid flow path parallel to the evaporator for boiling the working fluid, the boiler comprising an axially extending core region having a substantially constant cross sectional area and a predetermined length, and a porous capillary region surrounding the core region and cooperating with the core region to define means to produce a near sonic velocity saturated vapor;
• and
• an ejector located at a junction of the primary and secondary flow paths sufficiently close to the outlet of the boiler to receive the near sonic velocity saturated vapor from the boiler, the ejector comprising:
• a converging-diverging nozzle through which the working fluid from the boiler travels and from which the working fluid from the boiler exits at a supersonic velocity and reduced pressure, the converting section having an included angle and length preselected to receive the working fluid from the boiler as a near sonic velocity saturated vapor;
• an annular input nozzle surrounding the converging-diverging nozzle through which the working fluid from the evaporator means enters the ejector;
• a mixing section in which the working fluid from the boiler and the working fluid from the evaporator are mixed, the mixing section inducing a shock wave region for creating a standing shock wave to increase the pressure of the working fluid;
• and
• a diffuser to further increase the pressure of the working fluid such that the pressure of the working fluid at the exit of the diffuser is at least the saturation pressure of the condenser.