Cooling device based on brayton cycle

FIELD: machine engineering.

SUBSTANCE: cooling device based on Brayton cycle (100) according to the present invention in a refrigerant line (101) comprises several stages of compressors (102a, 102b, 102c); a sensor (160) the temperature for detecting the thermal load of a cooling object and a buffer reservoir (111) provided between a low-pressure line (109) and a line (110) high pressure. The coolant flow rate in the coolant line is adjusted by adjusting the opening degree of the valves (112, 113) to correct refrigeration performance.

EFFECT: providing cooling device based on Brayton cycle using multiple stages of compressors and having good response without efficiency reduction due to thermal load change of the cooled object.

6 cl, 8 dwg

 



 

Same patents:

FIELD: heating.

SUBSTANCE: group of inventions relates to a method of cooling/liquefaction at low temperature of the working fluid, in particular the working fluid having helium in its composition or constituting pure helium, using the device of cooling/liquefaction, comprising a working circuit equipped with a compression station and a cold unit. In the device of cooling or liquefaction the working gas is subjected in the operating circuit to the cycle impact, comprising sequentially compressing the working fluid in the compression station, cooling and expansion of this working fluid in the cold unit and heating with the working fluid with the purpose to return it to the compression station. This compression station comprises one or more compression stages, in each of which one or more compressors are used, mounted on the supports. The cooling device comprises a device of obstructive gas injection, different from the working fluid, at the level of one support of one or more compressors in order to form the gas barrier directing leakage of the working fluid from the working circuit in the direction of the recirculation zone and the return of this working fluid to the working circuit.

EFFECT: group of inventions is aimed at improving reliability and economical efficiency.

25 cl, 5 dwg

FIELD: heating.

SUBSTANCE: invention refers to refrigerating equipment. An air refrigerating unit comprises a turbocompressor, a turboexpander and a combustion chamber. The output of the turbocompressor's compressor is connected to the input of a pneumatic controller. The first output of the pneumatic controller is communicated with the combustion chamber. The second output of the pneumatic controller through the first air cooler is connected to the input of the second compressor of the turboexpander. The input of the turbocompressor turbine is communicated with the output of the combustion chamber. The unit is equipped by a heat pump. The heat pump circuit comprises a steam and gas condenser and an additional compressor driven by the turbocompressor turbine. The output of the additional compressor is communicated with the heat absorption circuit of the steam and gas condenser through the heat releasing circuit of a steam evaporator and a throttle. The output of the heat absorption circuit of the steam and gas condenser is communicated with the input of the additional compressor. A steam superheater is installed at the gas removing line between the output of the turbocompressor turbine and a regenerator. The steam and gas condenser, a heat exchanger and a separator are successively installed at the gas removing line between the output of the regenerator and the atmosphere. The gas output of the separator is led out to the atmosphere. The condensate output of the separator is led to the input of the heat absorption circuit of the regenerator. The steam output of the heat absorption circuit of the regenerator is communicated with the combustion chamber by a line including successively connected heat absorption circuits of the steam evaporator and the superheater.

EFFECT: invention is aimed at the refrigeration efficiency increase and environment protection improvement.

2 cl, 1 dwg

FIELD: machine building.

SUBSTANCE: turbo refrigerator plant comprises, at least, one turbo refrigerator with motor communicated with refrigeration chamber accommodating air cooler and fan. In compliance with this invention, refrigeration chamber temperature is controlled by varying motor rpm. To freeze said chamber to preset temperature, motor rpm are increased from minimum to maximum together with switching fan on and reducing motor rpm from rated to minimum with simultaneous switching fan off on reaching preset temperature.

EFFECT: higher efficiency and reliability, longer life.

2 cl, 1 dwg

FIELD: machine building.

SUBSTANCE: method of producing cold air in turbo-refrigerator comprises atmospheric air withdrawal, compressing aforesaid air in turbo-compressor compressor, cooling it feeding it to turbo-expander compressor inlet. It compresses compressing it additionally, cooling and feeding to turbo-expander turbine inlet, cold air being transferred from turbo-expander turbine outlet to its inlet. Compressed air flow coming from turbo-compressor compressor is divided into two flows. One flow is fed, via air cooler, to the turbo-expander compressor inlet. Second flow, preferably that with lower flow rate, is directed into combustion chamber to oxidise fuel, while resultant combustion products are mixed with steam. Steam is produced by power of gases outcoming from turbo-compressor turbine. Mix obtained is sent to turbo-compressor turbine.

EFFECT: increased refrigeration factor.

1 dwg

Air refrigerator // 2370711

FIELD: machine building.

SUBSTANCE: proposed air refrigerator comprises turbo compressor, turbo expander and combustion chamber. Turbo compressor outlet communicates, via first air cooler, with turbo expander compressor inlet. Turbo compressor turbine inlet communicates with combustion chamber outlet. Turbo expander compressor outlet communicates, via second air cooler, with the inlet of turbo expander turbine, while outlet of the latter communicates with cold consumer. Turbo compressor outlet communicates with the inlet of air control valve that serves to divide the flow into two flows. Second outlet of air control valve communicates, via first air cooler, with turbo expander compressor inlet. Combustion chamber communicates with fuel feed assembly, air control valve first outlet and steam source outlet. Combustion chamber outlet communicates with turbo compressor turbine inlet. Turbo compressor turbine inlet accommodates steam source. Turbo compressor and turbo expander incorporate air-lubed bearings.

EFFECT: increased refrigeration factor.

4 cl, 1 dwg

FIELD: mechanical engineering, gas distribution.

SUBSTANCE: group of inventions relates to heat and power engineering and is goaled for the application in the means of using energy of natural gas operational pressure differential. Method of supplying natural gas to consumers by a gas distribution station (GDS) with reducing lines implies simultaneous production of electric energy and cold during reduction with the usage of a power and refrigerating unit (PRU) which is switched on parallel to the GDS. PRU is equipped by an expansion-generation aggregate (EGA) with a heat exchanger. Automatic units for opening/closing of GDS reducing lines synchronously with EGA switching on/off are mounted at the reducing lines to provide for interconnected functioning of GDS and PRU as a unite gas-reducing system with keeping total section of its elements for gas passing in case of changes in gas supply mode, input gas pressure and number of operating EGA. In case of closing all reducing lines the GDS is put into reserve, gas input into the GDS collector and gas output are blocked by controlled shut-off valves. In case of PRU or most of EGA stop the above shut-off valves and GDS reducing lines are opened providing for standard GDS operation.

EFFECT: increasing stability of the time variable of supplying gas to the consumers along with keeping specified gas pressure and allowable temperature at the system output.

14 cl, 2 dwg

FIELD: heating engineering, particularly heat pumps and domestic and industrial cooling plants.

SUBSTANCE: method involves simultaneously performing isothermal compression and adiabatic expansion of different working body portion parts with following pressure recovery to initial value in heating and cooling heat-exchangers. Heterogeneous working body supplied as foamed neutral liquid provided with foaming additives and inert gas, is compressed. Then the working body is separated into liquid and gaseous fractions, which are separately throttled and expanded correspondingly. After that the fractions are separately supplied into parallel heating and cooling heat-exchangers with following mixing thereof and foam generation. Device comprises working body circulation loops provided with compressor, throttle and cooling and heating heat-exchangers. Compressor outlet is connected with tangential connection pipe of separator. Upper connection pipe of separator is linked to expander inlet. Lower connection pipe thereof is attached to throttle, which in turn is connected with inlet nozzle of injector included in inlet connection pipe of compressor through heating heat-exchanger. Side connection pipe of injector is communicated with expander outlet through cooling heat-exchanger. The expander is mechanically or electrically linked to compressor drive.

EFFECT: decreased pressure in cooling and heating heat-exchangers to compressor pressure level and increased ecological safety.

5 cl, 3 dwg

FIELD: cooling and heating equipment, particularly for simultaneous environmental air heating and cooling in industrial objects.

SUBSTANCE: device comprises turbo-expander and multistage compressor connected to turbo-expanded through high-pressure pipeline. High-pressure pipeline includes water heat-exchanger and the first dehumidifier, as well as two recuperative heat-exchangers and the second dehumidifier. Low-pressure pipeline communicates turbo-expander with object to be cooled or heated. Air inlet line has serially arranged sucking means and filter. Air inlet line is linked to multistage compressor. Single-stage centrifugal pump and turbo-expander are connected to common shaft. Additional dehumidifier is installed downstream of the first recuperative heat-exchanger. Additional heat-exchanger is arranged in low-pressure line so that one cavity thereof is connected to the second recuperative heat-exchanger inlet and another one is communicated with outlet thereof. Low-pressure line section located upstream of object to be cooled and/or heated is made as at least one pipeline provided with electric production air heater. Additional air supply loop branches away from air inlet line upstream of multistage compressor and is communicated with single-stage centrifugal pump inlet. Excessive heat removal loop is connected to single-stage centrifugal pump outlet.

EFFECT: increased reliability and thermodynamic efficiency, as well as improved operational conditions.

4 cl, 2 dwg

FIELD: transmission of thermal energy to vacuum dehydration and drying machines, vacuum driers, evaporation machines and low-temperature dehydration of materials; reworking and utilization of wastes of poultry farms and pig-breeding farms; food-processing, medical and microbiological industries.

SUBSTANCE: proposed method includes loading the staring material, evacuation of chamber to pressure below atmospheric, mixing the starting material, collection, drainage and removal of condensate, conductive supply of heat to starting material at simultaneous heating it within temperature range whose low level is limited by water evaporation temperature at working pressure in technological space and upper level is limited by conditions ensuring avoidance of losses of useful properties of starting material and destruction of living cells which is necessary for retaining proper properties of final product. The process is completed by discharge of dehydrated product. Thermal energy of water steam released in the course of dehydration of starting material in vacuum chamber is returned to heating system of starting material due to compression of steam to pressure not below atmospheric, after which compressed steam is delivered to hermetic cavities of technological heat exchanger-evaporator unit where starting material is kept. Superheated steam is condensed inside unit and thermal energy released at this is transferred to material being dehydrated which moves over surface of unit. Condensate is continuously drained from hermetic cavities of heat exchanger-evaporator via pipe line connected to heat exchanger which is used for delivery of cold starting material to vacuum chamber. Thermal energy of condensate is transmitted to cold starting material. Device proposed for realization of this method includes vacuum chamber where technological heat exchanger-evaporator unit is mounted , loading/unloading system, starting material heating system, chamber evacuation system, condensate receiver; it is additionally provided with compressor connected with collector through which used hot water-and-steam mixture is discharged into technological heat exchanger-evaporator unit and then to heat exchanger used for heating the starting material for delivery of it to loading system.

EFFECT: reduction of heat losses.

3 cl, 1 dwg

FIELD: technology of production of cold.

SUBSTANCE: proposed method is used for cooling the air contained in isolated cavity; air to be cooled is directed to compressor where it is compressed at rise of temperature; then, compressed air is directed to heat exchanger where it is cooled at constant pressure and then it is directed to gas-expansion machine where it is expanded and its temperature is lowered, after which it is directed to isolated cavity. Cooling the compressed air in heat exchanger is effected through heat exchange with surrounding medium. Depending on ambient temperature, area of heat-exchange surface is varied between compressed air to be cooled in heat exchanger and surrounding medium. Temperature of cooled air at the gas-expansion machine outlet is changed to preset level.

EFFECT: possibility of maintaining required temperature conditions in isolated cavity; enhanced energy efficiency of process.

10 cl, 3 dwg

FIELD: wave expander-compressors, possibly used in compression systems and plants with expansion machines.

SUBSTANCE: expander-compressor includes housing in which rotor is mounted on shaft. Rotor has energy-exchange ducts communicated at rotor rotation with branch pipes for supplying and discharging gas through gas supply nozzles and diffusers for discharging gas in respective gas distributing devices. Housing is in the form of stator having electric winding. Rotor having energy-exchange ducts is provided with short-circuit winding whose rods are arranged between outer surface of rotor and its energy-exchange ducts.

EFFECT: simplified design of wave type expander-compressor.

2 dwg

FIELD: technology of production of cold.

SUBSTANCE: proposed method is used for cooling the air contained in isolated cavity; air to be cooled is directed to compressor where it is compressed at rise of temperature; then, compressed air is directed to heat exchanger where it is cooled at constant pressure and then it is directed to gas-expansion machine where it is expanded and its temperature is lowered, after which it is directed to isolated cavity. Cooling the compressed air in heat exchanger is effected through heat exchange with surrounding medium. Depending on ambient temperature, area of heat-exchange surface is varied between compressed air to be cooled in heat exchanger and surrounding medium. Temperature of cooled air at the gas-expansion machine outlet is changed to preset level.

EFFECT: possibility of maintaining required temperature conditions in isolated cavity; enhanced energy efficiency of process.

10 cl, 3 dwg

FIELD: transmission of thermal energy to vacuum dehydration and drying machines, vacuum driers, evaporation machines and low-temperature dehydration of materials; reworking and utilization of wastes of poultry farms and pig-breeding farms; food-processing, medical and microbiological industries.

SUBSTANCE: proposed method includes loading the staring material, evacuation of chamber to pressure below atmospheric, mixing the starting material, collection, drainage and removal of condensate, conductive supply of heat to starting material at simultaneous heating it within temperature range whose low level is limited by water evaporation temperature at working pressure in technological space and upper level is limited by conditions ensuring avoidance of losses of useful properties of starting material and destruction of living cells which is necessary for retaining proper properties of final product. The process is completed by discharge of dehydrated product. Thermal energy of water steam released in the course of dehydration of starting material in vacuum chamber is returned to heating system of starting material due to compression of steam to pressure not below atmospheric, after which compressed steam is delivered to hermetic cavities of technological heat exchanger-evaporator unit where starting material is kept. Superheated steam is condensed inside unit and thermal energy released at this is transferred to material being dehydrated which moves over surface of unit. Condensate is continuously drained from hermetic cavities of heat exchanger-evaporator via pipe line connected to heat exchanger which is used for delivery of cold starting material to vacuum chamber. Thermal energy of condensate is transmitted to cold starting material. Device proposed for realization of this method includes vacuum chamber where technological heat exchanger-evaporator unit is mounted , loading/unloading system, starting material heating system, chamber evacuation system, condensate receiver; it is additionally provided with compressor connected with collector through which used hot water-and-steam mixture is discharged into technological heat exchanger-evaporator unit and then to heat exchanger used for heating the starting material for delivery of it to loading system.

EFFECT: reduction of heat losses.

3 cl, 1 dwg

FIELD: cooling and heating equipment, particularly for simultaneous environmental air heating and cooling in industrial objects.

SUBSTANCE: device comprises turbo-expander and multistage compressor connected to turbo-expanded through high-pressure pipeline. High-pressure pipeline includes water heat-exchanger and the first dehumidifier, as well as two recuperative heat-exchangers and the second dehumidifier. Low-pressure pipeline communicates turbo-expander with object to be cooled or heated. Air inlet line has serially arranged sucking means and filter. Air inlet line is linked to multistage compressor. Single-stage centrifugal pump and turbo-expander are connected to common shaft. Additional dehumidifier is installed downstream of the first recuperative heat-exchanger. Additional heat-exchanger is arranged in low-pressure line so that one cavity thereof is connected to the second recuperative heat-exchanger inlet and another one is communicated with outlet thereof. Low-pressure line section located upstream of object to be cooled and/or heated is made as at least one pipeline provided with electric production air heater. Additional air supply loop branches away from air inlet line upstream of multistage compressor and is communicated with single-stage centrifugal pump inlet. Excessive heat removal loop is connected to single-stage centrifugal pump outlet.

EFFECT: increased reliability and thermodynamic efficiency, as well as improved operational conditions.

4 cl, 2 dwg

FIELD: heating engineering, particularly heat pumps and domestic and industrial cooling plants.

SUBSTANCE: method involves simultaneously performing isothermal compression and adiabatic expansion of different working body portion parts with following pressure recovery to initial value in heating and cooling heat-exchangers. Heterogeneous working body supplied as foamed neutral liquid provided with foaming additives and inert gas, is compressed. Then the working body is separated into liquid and gaseous fractions, which are separately throttled and expanded correspondingly. After that the fractions are separately supplied into parallel heating and cooling heat-exchangers with following mixing thereof and foam generation. Device comprises working body circulation loops provided with compressor, throttle and cooling and heating heat-exchangers. Compressor outlet is connected with tangential connection pipe of separator. Upper connection pipe of separator is linked to expander inlet. Lower connection pipe thereof is attached to throttle, which in turn is connected with inlet nozzle of injector included in inlet connection pipe of compressor through heating heat-exchanger. Side connection pipe of injector is communicated with expander outlet through cooling heat-exchanger. The expander is mechanically or electrically linked to compressor drive.

EFFECT: decreased pressure in cooling and heating heat-exchangers to compressor pressure level and increased ecological safety.

5 cl, 3 dwg

FIELD: mechanical engineering, gas distribution.

SUBSTANCE: group of inventions relates to heat and power engineering and is goaled for the application in the means of using energy of natural gas operational pressure differential. Method of supplying natural gas to consumers by a gas distribution station (GDS) with reducing lines implies simultaneous production of electric energy and cold during reduction with the usage of a power and refrigerating unit (PRU) which is switched on parallel to the GDS. PRU is equipped by an expansion-generation aggregate (EGA) with a heat exchanger. Automatic units for opening/closing of GDS reducing lines synchronously with EGA switching on/off are mounted at the reducing lines to provide for interconnected functioning of GDS and PRU as a unite gas-reducing system with keeping total section of its elements for gas passing in case of changes in gas supply mode, input gas pressure and number of operating EGA. In case of closing all reducing lines the GDS is put into reserve, gas input into the GDS collector and gas output are blocked by controlled shut-off valves. In case of PRU or most of EGA stop the above shut-off valves and GDS reducing lines are opened providing for standard GDS operation.

EFFECT: increasing stability of the time variable of supplying gas to the consumers along with keeping specified gas pressure and allowable temperature at the system output.

14 cl, 2 dwg

Air refrigerator // 2370711

FIELD: machine building.

SUBSTANCE: proposed air refrigerator comprises turbo compressor, turbo expander and combustion chamber. Turbo compressor outlet communicates, via first air cooler, with turbo expander compressor inlet. Turbo compressor turbine inlet communicates with combustion chamber outlet. Turbo expander compressor outlet communicates, via second air cooler, with the inlet of turbo expander turbine, while outlet of the latter communicates with cold consumer. Turbo compressor outlet communicates with the inlet of air control valve that serves to divide the flow into two flows. Second outlet of air control valve communicates, via first air cooler, with turbo expander compressor inlet. Combustion chamber communicates with fuel feed assembly, air control valve first outlet and steam source outlet. Combustion chamber outlet communicates with turbo compressor turbine inlet. Turbo compressor turbine inlet accommodates steam source. Turbo compressor and turbo expander incorporate air-lubed bearings.

EFFECT: increased refrigeration factor.

4 cl, 1 dwg

FIELD: machine building.

SUBSTANCE: method of producing cold air in turbo-refrigerator comprises atmospheric air withdrawal, compressing aforesaid air in turbo-compressor compressor, cooling it feeding it to turbo-expander compressor inlet. It compresses compressing it additionally, cooling and feeding to turbo-expander turbine inlet, cold air being transferred from turbo-expander turbine outlet to its inlet. Compressed air flow coming from turbo-compressor compressor is divided into two flows. One flow is fed, via air cooler, to the turbo-expander compressor inlet. Second flow, preferably that with lower flow rate, is directed into combustion chamber to oxidise fuel, while resultant combustion products are mixed with steam. Steam is produced by power of gases outcoming from turbo-compressor turbine. Mix obtained is sent to turbo-compressor turbine.

EFFECT: increased refrigeration factor.

1 dwg

FIELD: machine building.

SUBSTANCE: turbo refrigerator plant comprises, at least, one turbo refrigerator with motor communicated with refrigeration chamber accommodating air cooler and fan. In compliance with this invention, refrigeration chamber temperature is controlled by varying motor rpm. To freeze said chamber to preset temperature, motor rpm are increased from minimum to maximum together with switching fan on and reducing motor rpm from rated to minimum with simultaneous switching fan off on reaching preset temperature.

EFFECT: higher efficiency and reliability, longer life.

2 cl, 1 dwg

FIELD: heating.

SUBSTANCE: invention refers to refrigerating equipment. An air refrigerating unit comprises a turbocompressor, a turboexpander and a combustion chamber. The output of the turbocompressor's compressor is connected to the input of a pneumatic controller. The first output of the pneumatic controller is communicated with the combustion chamber. The second output of the pneumatic controller through the first air cooler is connected to the input of the second compressor of the turboexpander. The input of the turbocompressor turbine is communicated with the output of the combustion chamber. The unit is equipped by a heat pump. The heat pump circuit comprises a steam and gas condenser and an additional compressor driven by the turbocompressor turbine. The output of the additional compressor is communicated with the heat absorption circuit of the steam and gas condenser through the heat releasing circuit of a steam evaporator and a throttle. The output of the heat absorption circuit of the steam and gas condenser is communicated with the input of the additional compressor. A steam superheater is installed at the gas removing line between the output of the turbocompressor turbine and a regenerator. The steam and gas condenser, a heat exchanger and a separator are successively installed at the gas removing line between the output of the regenerator and the atmosphere. The gas output of the separator is led out to the atmosphere. The condensate output of the separator is led to the input of the heat absorption circuit of the regenerator. The steam output of the heat absorption circuit of the regenerator is communicated with the combustion chamber by a line including successively connected heat absorption circuits of the steam evaporator and the superheater.

EFFECT: invention is aimed at the refrigeration efficiency increase and environment protection improvement.

2 cl, 1 dwg

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