Enhanced liquid pressure cycle having an ejector

Abstract

The enhanced liquid pressure cycle having an ejector consists of a high-pressure positive displacement liquid rotary pump (liquid pressure pump). The liquid pressure pump provides the primary high-pressure mass flow to the evaporator and the pressure mass flow to the driving force input to a condensing and mixing ejector. The system is further enhanced by a vapor compressor/turbine/motor combination which provides the ability to suck out and lower the refrigerant pressure output from the evaporator while the interconnected turbine offsets the power input requirements of the vapor compressor. The high-pressure liquid from the liquid pressure pump is divided into two pressure streams. The first stream is directed to an expansion valve then on to an evaporator for space air or other medium cooling. The second stream is directed to the driving force input port of an ejector. This high-pressure input mixes with the low-pressure output from the turbine. The result of this mixing provides for sufficient pressure enhancement to condense the combination liquid and vapor refrigerant as it passes through the condenser. The liquid flow from the condenser proceeds back to the liquid pressure pump and the cycle is repeated. The horsepower to pressurize a liquid for a given mass flow of refrigerant for the enhanced liquid pressure cycle is significantly less than the horsepower required for a vapor compression cycle of equal mass flow.

1 . An enhanced liquid pressure cycle having an ejector comprising:
 a positive displacement rotary liquid pump for the systems primary high pressure generation;   an expansion valve disposed at the inlet side of the evaporator;   an evaporator for evaporating low-pressure refrigerant thereby absorbing heat after being decompressed by an expansion valve;   an ejector for mixing the high-pressure stream and a low-pressure stream whose combined output pressure is sufficient for the operating conditions of the condenser;   a condenser for cooling and condensing into a liquid the refrigerant discharged by the ejector;   a compressor/turbine/motor combination which operates as a single unit interconnected with a common drive shaft whereby the compressor component sucks out and lowers the pressure in the evaporator. The compressor high-pressure output is inputted into the turbine component where the high-pressure gas is expanded generating an offsetting horsepower required by the compressor. The third component, the electric motor, provides the basic starting horsepower and makes up for any offsetting horsepower deficiency between the compressor and turbine;   a liquid receiver to insure that sufficient liquid refrigerant is available for the liquid pressure pump.   
     
     
         2 . An enhanced liquid pressure cycle having an ejector according to  claim 1  wherein the mixing refrigerant is HFC-404A; 
     
     
         3 . An enhanced liquid pressure cycle having an ejector according to  claim 1  wherein the mixing refrigerant is HFC-407A; 
     
     
         4 . An enhanced liquid pressure cycle having an ejector according to  claim 1  wherein the mixing refrigerant is HFC-410A.