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US 6,141,987 AGranted
Absorption refrigerating system and working mixture for said system
AssigneeGaz de France
InventorsMeng Heng Huor, Gilles Le Halpere, Michel Prevost, Isabelle Soide
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Abstract
An absorption refrigeration system which utilizes absorption with a double separating effect where the pressure of the condenser (K2) is offset relative to the pressure of the second generator (G2). In this system, absorption of the working mixture is achieved using methanol as the refrigerating agent and a compound having a methylphenol group as a solvent. The system is useful for producing cold or heat, particularly for the air conditioning of elementary units of a building.
Claims17
A double separation absorption refrigeration system comprising:
- a first generator (G1) at a pressure Ph and a temperature .theta.m, and being in hydraulic connection to a refrigerant and solvent supply duct channel (1), a refrigerant outlet duct channel (2), and a refrigerant and solvent outlet duct channel (3);
- a second generator (G2) in hydraulic communication via duct channel (3) with said first generator, wherein the second generator is at a pressure Pk and a temperature .theta.i, wherein Pk is lower than Ph and .theta.i is lower than .theta.m, and wherein the second generator is in hydraulic connection with a refrigerant outlet duct channel (4) and a refrigerant outlet duct channel (8);
- a condenser (K2) in hydraulic communication via duct channel (2) with said first generator (G1), in hydraulic communication via duct channel (4) with said second generator (G2), and in hydraulic connection with outlet duct channel (5), wherein the condenser is at pressure Pk.sub.2 and a temperature of .theta., wherein Pk.sub.2 is greater than Pk but lower than Ph, and wherein temperature .theta. is lower than .theta.i;
- an evaporator (E) at a pressure Po and a temperature of .theta.o, wherein said evaporator is in hydraulic connection with condenser K2 via duct channel (5) and with outlet duct channel (6), wherein Po is lower than Pk, and wherein temperature .theta.o is lower than .theta.i;
- an absorber (A) at a pressure of approximately Po and a temperature .theta., wherein said absorber is in hydraulic connection with evaporator E via duct channel (6) and with outlet duct channel (1);
- a compression device (P) having an inlet side and an outlet side, said compression device being operatively located in the duct channel (1) and in hydraulic connection with absorber (A) on the inlet side and with generator (G1) on the outlet side;
- and
- a refrigerant and a solvent.
5 more elements
A refrigerant-solvent operating combination for use in an absorption refrigeration system, said combination comprising a methylphenol solvent and methanol refrigerant.
A process of cooling with an absorption refrigeration system, said process comprising:
- separating a solvent-refrigerant operating combination comprising a solvent and a refrigerant in a first generator (G1) into a refrigerant vapor and a refrigerant-depleted solvent-refrigerant operating combination, wherein the first generator (G1) is at a pressure Ph and a temperature .theta.m;
- conveying the vaporous refrigerant from the first generator to condenser (K2), wherein the condenser (K2) is at temperature .theta. and at pressure Pk.sub.2, and wherein .theta. is less than .theta.m and Pk.sub.2 is less than Ph;
- conveying the refrigerant-depleted solvent-refrigerant operating combination from the first generator (G1) to a second generator (G2), wherein the second generator (G2) is at temperature .theta.i and at pressure PK, wherein .theta.i is less than .theta.m and greater than .theta., and wherein PK is less than Ph and less than Pk.sub.2 ;
- separating the refrigerant-depleted solvent-refrigerant operating combination in the second generator (G2) into a refrigerant vapor and a further-refrigerant-depleted solvent-refrigerant operating combination;
- compressing the refrigerant vapor from generator (G2), and providing the vapor to the condenser (K2);
- conveying the refrigerant from the condenser (K2) to an evaporator (E), wherein the evaporator (E) is at temperature .theta.o and at pressure Po, wherein evaporator (E) is in thermal connection to an item to be cooled, wherein .theta.o is less than .theta., and wherein Po is less than PK;
- evaporating the refrigerant in evaporator (E), obtaining the thermal energy from the item to be cooled;
- conveying the refrigerant vapor from the evaporator (E) and conveying the further-refrigerant-depleted solvent-refrigerant operating combination from generator (G2) to an absorber (A), wherein the absorber (A) is operated at temperature .theta.' and pressure Po, wherein .theta.' is greater than .theta.o and less than .theta.i, thereby combining the two into a solvent-refrigerant operating combination;
- and
- heating and compressing the solvent-refrigerant operating combination from absorber (A) to temperature .theta.m and pressure Ph, and conveying this combination to the first generator (G1).
7 more elements
Dependencies are inferred from the claim text.