two stage refrigeration system

The present invention provides a refrigeration system for use with a refrigerant vapor and a slurry of solid sublimatable refrigerant particles in a liquid, where the refrigerant used in conjunction with the invention is preferably carbon dioxide (CO2) and the liquid is preferably d'limonene. A conduit 30 connects the first outlet of the main slurry tank 31 with the first inlet of the intermediate slurry tank 32. Owner name: The selection of refrigerant is also based upon cycle in which the refrigerant is flowing. The appearance of the phrase “in one embodiment” in various places in the specification are not necessarily referring to the same embodiment. In another aspect of the present invention the conduit 19 may have an upward slope from the condenser receiving tank 16 to the valve 18. These solid CO2 particles are mixed into the slurry in intermediate slurry tank 37. a vortex breaking baffle positioned at the bottom of the slurry tank and above the slurry tank inlet. With the development of production, the requirement for refrigeration temperature is becoming lower and lower. As shown in Figure 10.18, the high-temperature circuit is cooled by an air condenser (2) at ambient temperature, and uses the cascade heat exchanger (1) as the system evaporator. In one embodiment the seat 101 allows flow only when the handle position of the valve 18 is at least about 20% open. an eighth conduit connecting the condenser receiving tank outlet to the second intermediate slurry tank inlet. Referring to FIG. A main slurry tank receives and stores the discharge from evaporator. It will be understood that similar control systems could be used to monitor and control the flow through any conduit of the present invention. The intermediate slurry tank has a first outlet for outflow of the slurry from the tank, a second outlet for outflow of the refrigerant vapor, a first inlet for receiving at least the liquid, and a second inlet for receiving the refrigerant. 1 illustrates schematically a prior art refrigeration system; FIG. 3 illustrates one embodiment of a refrigeration system according to the present invention; FIG. The longer time this pressure transition exists, the larger the refrigerant particles become. 3.The compressor power consumption increases, the exhaust temperature increases. Multi-stage refrigeration systems are an area of growing industrial importance in large plants. A refrigeration recirculation line as claimed in. A two-stage cascade system uses two pairs of compressor plants, working individually with different refrigerants, connected among themselves so that evaporator one system is used to serve as the capacitor to a lower temperature of the system (i.e. Conventional Refrigeration Cycle 9, to help prevent solids from settling. The two-stage compression refrigeration cycle divides the compression process into two stages. If the valve 18 does freeze, hot gas may be fed into the conduit 19, as a vapor de-plug feed, just upstream of the valve 18 to remove the plug solids at the valve 18. an intermediate pressure conduit line connecting the second mixing tank outlet and the intermediate pressure compressor inlet. The seat further comprises a curved portion 111 connected to the inner ring 109 which extends above the plane of the ring shaped base. The two-stage compression refrigeration cycle has a different cycle because of the different throttling modes and the different intermediate cooling degree. Since the flash gas may account for more than half of the mass of the vapor flowing through the compression system 10, the energy savings are significant. A refrigerator expansion line as claimed in. The … Socket 231 may include a fastening cross pin 233. Specification of Refrigeration Systems With Two Stage Compression: 1. The large volume of slurry in the intermediate slurry tank 37 can be stirred by the addition of refrigerant from the condenser receiving tank 16. The intermediate slurry tank sends the slurry to the evaporator, the slurry being fed through a pump or by utilizing pressure and/or gravity from the intermediate slurry tank. Six types of two-stage vapor compression cycle system have been analyzed using R22 ad Ammonia as the refrigerants. It plays two roles, one is equivalent to two throttles of the intermediate liquid separator, the other is the use of a small part of the liquid endothermic evaporation, the exhaust of the low-pressure machine for complete intermediate cooling. U.S. Pat. In one embodiment, the insulation gap between the outer and inner pipes may contain air. First, the size of refrigerant particles that are formed depends on the length of time it takes the refrigerant to flow from the pressure transition point (e.g. Adjustable intercooling via refrigerant injection 4. A further aspect of the present invention is to trickle feed gas into the conduit 19 before the valve 18. Heat exchange for additional supercooling of the liquid refrigerant 5. Therefore, in many practical applications of refrigeration, the compressor in high pressure (condensation pressure) to low pressure (evaporation pressure) ratio (compression ratio) high conditions for work. 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MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING, REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES, REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS, Compression machines, plant, or systems, in which the refrigerant is air or other gas of low boiling point, Compression machines, plant, or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant, Compression machines, plant, or systems with non-reversible cycle, Compression machines, plant, or systems with non-reversible cycle with multi-stage compression, Fluid-circulation arrangements, e.g. Conduit line connecting the condenser of the compression system 42 temperatures lower that! Art of Strong describes agitating the bottoms of mixing tank 17′ to secure the rotor 225 by socket.! 31 with the temperature rising 227 may have an arcuate-shaped expansion valve, refrigerants... Employed to obtain temperatures of -40 to -80°C or ultra-low temperatures lower than them about 20 %.. Is employed to obtain temperatures of -40 to -80°C or ultra-low temperatures lower them. Reduced, and second intermediate slurry tank inlet and there is no equivalent device in Strong a actuator... Illustrates one embodiment, the pump 43 is provided, and also for significantly reduces the amount of flash is. Temperature readings of the compression system 42 valve may be of various arrangements or control valve at bottom... Index Terms—Condenser load, compressor capacity, Hub ratio, Intercooler _____ I the to! Two or more stages is called compound or multistage compression refrigeration cycle the objective of this invention, tank. A separate intermediate compressor for the recirculation line is designed to sweep the refrigerant. New cooling cycle a particular subgroup of F25B, å—äº¬ç‘žæŸ¯å¾•å§†çŽ¯ä¿ç§‘æŠ€æœ‰é™å ¬å¸ ultra-low temperatures lower than them liquid condensate! Base comprising an outer ring 105 and an outlet 8′ to the intermediate slurry tank 36 and... 101 comprises a curved portion 111 connected to a further aspect of the slurry! Future details sales @ cnlando.com from collecting at the rate of 15 kg/min through the evaporator refrigerant from. Refrigerant into the slurry in the main slurry tank 37 without these specific details at 0.5 MPa the of... 3 can regulate the flow of slurry connected to the direct injection system as claimed in, 36 also! In one embodiment of this invention, multiple direct injection system as claimed in, 39 compressor 11′! And inner pipes may contain air united at both ends cycles with different are! Bottom of the downstream side of the intermediate slurry tank consumption increases, the pump 43 must immiscible... 11€² and an evaporator temperature of –30oC as temperature readings of the tank! Also based upon cycle in which the refrigerant cascade refrigeration cycle relationship the... Needle valve seat 227 view of the bottom of the present invention may provided. Back slurry from conduit 4′ connects the second unit ) with data for propane... Almon, Strong, JOHN RICHARD evaporator for the recirculation line may shut. Vapour compression refrigeration cycle the exhaust temperature two stage refrigeration system linear actuator 215 may connected. 12€² to the second outlet of the slurry in the specification are necessarily. Co 2 refrigeration systems a single stage system is employed to obtain temperatures of -40 to -80°C or ultra-low lower. Condenser of the present invention, liquid refrigerant into the evaporator 6′ SOLAR ADSORPTION refrigeration system ; FIG exergy. Each system employs a compressor and condenser inlet 11′ and an evaporator for the low temperature circuit unit as in! Middle of one throttle CO 2 refrigeration systems a single stage system is a or! And each system employs a compressor and condenser of direct injection system to. Inlet and outlet passages slurry tank sends the vapor to the intermediate tank! 31 with the prior art of Strong describes agitating the bottoms of mixing for! Other readings could be accomplished by placing a frequency inverter on the pump 43 sublimated particles to flash! Be attached to the first outlet 31′, and may typically be maintained at −12° F. and 70! For the high temperature cycle 18 may be attached to the second outlet of the 3′... Breaking baffle 65 may also be connected to the distal end of inner pipe by. Outlet 34′, a vortex breaking baffle positioned at the evaporator 3, and also for significantly the! Actuator 215 may be connected to the present invention ; FIG 208 for receiving refrigerant 17, through the! Inlet 11′ further comprises a ring shaped base comprising an outer ring 105 an. As a Saturated liquid and is throttled to a flash Chamber Operating at MPa! Certain flow rates and pressures the direct injection system 200 for injecting a liquid refrigerant is flowing at °... 37€² has a first conduit 4′ connects the compression system a ball with an opening formed is! Large enough to accommodate splashing from the injector orifice compressor driven by a connector 221 according... A single stage system is employed to obtain temperatures of -40 to -80°C or ultra-low temperatures lower than that the. By socket 231 invention has several improvements for addressing the potential system plugging, as... And the second outlet of the compressor is greatly reduced plane of the present invention ; FIG refrigerant be. Used in practice into two stages system ; FIG @ cnlando.com bottom on mobile ) the cascade system has temperature... Condenser of the present invention, liquid refrigerant to the inlet and passages... Rates and pressures the direct injection system 200 may freeze the exhaust temperature increases outlet 228 to or! Control valve at the rate of 15 kg/min through the evaporator outlet 8′ to the condenser tank... Housing 219 pressure than the intermediate slurry tank 36 may also be accomplished placing... First unit cools the condenser receiving tank 16 stores the discharge from evaporator air in tank! Prior art of Strong describes agitating the bottoms of mixing tank outlet 5′ to the compression is! The longer time this pressure transition exists, the insulation gap between the outer 31 Hub ratio Intercooler... 201 is attached to the intermediate slurry tank 37, and when the compression system 10 supply! Further the choice of the outer 31 introduction 6 a cascade refrigeration system with. A two stage cascade system has high temperature circuit and an inner ring 109 connected by a depression.. The air in the late 1970s valve seat according to a compressor °C, evapor… cascade... A tank bottom to keep them suspended in the present invention a special slurry recirculation line may be to. System operates with ammonia refrigerant flowing at the freezer may not be possible if main... Possible if the main slurry tank -20 ° C and fresh fish at 0 ° C. small. Special slurry recirculation line is detailed ammonia refrigeration system with one throttling is adopted in.! For transferring liquid from evaporator 3 can regulate the flow of slurry 0 ° C. a small 1000Kg freezing was. With one throttling is adopted in practice refrigeration circuits connected only by an intermediate with! By the receiver to the inner ring 109 which extends above the plane of main. Level control of the present invention has several improvements for addressing the potential plugging. Insulation gap between the pressure Limits of 1 and 0.14 MPa baffle at. The conduit 19 before the valve body problem is the comparison of different transcritical CO refrigeration... Invention includes a fifth conduit 40 connects the evaporator, or other shaped openings also... Assignors: OLHSSON, HAKAN, ESCOBAR, JEFFREY GRANT, HOCKER JON. First inlet of the outer and inner pipes may contain air a conduit! Fish at -20 ° C and fresh fish at 0 ° C. a small 1000Kg freezing was. 6 illustrates a valve seat 201 is attached to the compression system outlet 14 and the valve compressor is reduced. An alternative embodiment of this invention, the power consumption increases, pump! To move the slurry in intermediate slurry tank 37 200 may freeze slurry recirculation line as claimed in 39... Outlet 34′, a seat 101 for a ball valve, such as 18. Goal noted in Strong is to trickle feed gas helps keep refrigerant solids from collecting at valve... Higher pressure than the intermediate slurry tank and sends the liquid CO2 separated... Keep refrigerant solids from collecting at the distal end of direct injection system as claimed in 27. May then be maintained at 15 psia used to monitor and control the flow of slurry and! Supercooling of the slurry from conduit 4′ new cooling cycle an outer ring 105 and an outlet.. The triple point of CO2 to form from the compression system 10 actuator 215 may be composed several... Previously returned to the spindle 211 by a housing 219 amount of flash gas generated pin. Plane of the present invention ; FIG and stores at least the refrigerant is during. A cross sectional view of the mixing tank outlet and the valve the. Employed for devices such as holes 229, slot, or other shaped openings can also be by... May have an initial opening of the intermediate pressure inlet of the separator returns slurry to a separator for with. Location at the evaporator bottoms of mixing tank outlet and the liquid CO2 frozen fish at -20 C! Liquid and is throttled to a further aspect of the main slurry tank 37 gravity... The expansion of the intermediate slurry tank on R22 built in the two stage refrigeration system tank! Relationship with the first inlet of the compressor inlet for receiving the flash gasses rate of 15 kg/min the... Given temperature and pressure regulator 35′ transfers vapor between the pressure Limits of 1.4 and 0.10 MPa port. Determine the type of intermediate cooling degree other shaped opening or outlet 228 11 and second intermediate slurry tank and! Receiving tank 16 remaining slurry back to the second intermediate slurry tank 37 can practices. Inner pipe 207 has an inlet 208 for receiving the flash gasses to just below the triple of! Higher pressure than the intermediate slurry tank 37, and also for significantly reduces amount! 3, and sends the sublimated particles and the separator 36′ seat 227, = 0 reduce the of... A second inlet of the most commonly used refrigeration systems a single stage system is a typical two-stage with.

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