CN107314567B - Method for measuring supercritical CO2Apparatus and method for regenerator and cooler performance - Google Patents

Method for measuring supercritical CO2Apparatus and method for regenerator and cooler performance Download PDF

Info

Publication number
CN107314567B
CN107314567B CN201710461649.7A CN201710461649A CN107314567B CN 107314567 B CN107314567 B CN 107314567B CN 201710461649 A CN201710461649 A CN 201710461649A CN 107314567 B CN107314567 B CN 107314567B
Authority
CN
China
Prior art keywords
pressure
cooling
temperature
pressurizing
cooler
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201710461649.7A
Other languages
Chinese (zh)
Other versions
CN107314567A (en
Inventor
成克用
淮秀兰
郭江峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Institute of Engineering Thermophysics of CAS
Original Assignee
Institute of Engineering Thermophysics of CAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Institute of Engineering Thermophysics of CAS filed Critical Institute of Engineering Thermophysics of CAS
Priority to CN201710461649.7A priority Critical patent/CN107314567B/en
Publication of CN107314567A publication Critical patent/CN107314567A/en
Application granted granted Critical
Publication of CN107314567B publication Critical patent/CN107314567B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
    • F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • F25B40/06—Superheaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B45/00—Arrangements for charging or discharging refrigerant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/14—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)

Abstract

The invention discloses a method for measuring supercritical CO2Method and apparatus for regenerator and cooler performance including a high pressure low temperature system and a low pressure high temperature system, both systems being coupled to CO2Pressurizing and heating to obtain high-pressure low-temperature CO2And low pressure high temperature CO2CO entering the tested heat regenerator for heat exchange and entering the high-pressure low-temperature system2After heat exchange by a heat regenerator, carrying out pressure reduction cooling and recycling CO in a liquid storage tank and a low-pressure high-temperature system2The heat is exchanged by the heat regenerator and then is cooled by the cooler to be tested, and then is decompressed, cooled and recycled into the liquid storage tank. The device can simultaneously measure supercritical CO2The performance of the regenerator and the cooler in the system can be independently measured.

Description

Method for measuring supercritical CO2Apparatus and method for regenerator and cooler performance
Technical Field
The invention relates to a method for measuring supercritical CO2Device and method for regenerator and cooler performance, which can be used for researching supercritical CO2Flow and heat exchange characteristics within the regenerator and cooler.
Background
Supercritical CO2The Brayton cycle system has simple structure and higher efficiency than other cycle systems, thereby having wide application prospect. Supercritical CO at turbine outlet in cycle2Still has very high temperature, and is mixed with supercritical CO at the low temperature side by a regenerator2The heat exchange is carried out, and the circulation efficiency of the whole system can be obviously improved. In addition, CO is generated near the critical point2Has good compressibility and large specific heat capacity, obviously reduces the power consumption of a compressor and has good heat exchange performance, so that a cooler is needed for removing CO at the inlet of a turbine2Cooling to a temperature near the critical point.
At present, supercritical CO is aimed at2In terms of Brayton cycle system regenerators and coolers, a great deal of theoretical research has been conducted, but there is a lack of research on supercritical CO2Apparatus and methods for regenerator and cooler performance studies.
Disclosure of Invention
Technical problem to be solved
In view of the above problems, an object of the present invention is to provideAims at providing a method for measuring supercritical CO2A method and apparatus for regenerator and cooler performance is provided to solve the above problems.
(II) technical scheme
Method for measuring supercritical CO2The performance of the heat regenerator and the cooler comprises a high-pressure low-temperature system and a low-pressure high-temperature system;
the high-pressure low-temperature system comprises a first pressurizing and heating unit and a first cooling and decompressing unit, wherein an outlet of the first pressurizing and heating unit is connected with a first inlet of the tested heat regenerator, and a first outlet of the tested heat regenerator is connected with an inlet of the first cooling and decompressing unit;
the low-pressure high-temperature system comprises a second pressurizing and heating unit and a second cooling and decompressing unit, an outlet of the second pressurizing and heating unit is connected with a second inlet of the tested heat regenerator, and the tested cooler is arranged between the second outlet of the tested heat regenerator and the inlet of the second cooling and decompressing unit.
Preferably, the first pressure and heat unit is used for introducing CO2Pressurizing and heating to a first pressure and a first temperature, the second pressurizing and heating unit being used for pressurizing and heating CO2Pressurizing and heating to a second pressure and a second temperature, the second temperature being lower than the first temperature and the second pressure being higher than the first pressure, the first cooling decompression unit and the second cooling decompression unit being used for compressing CO2And (4) decompressing and cooling.
Preferably, the second pressurizing and heating unit comprises a compressor or a plunger pump, a second surge tank and a second intermediate frequency furnace which are arranged in sequence, and an outlet of the second pressurizing and heating unit is an outlet of the second intermediate frequency furnace;
the second cooling pressure reducing unit comprises a second air-cooled condenser, a second pressure reducing valve and a second glycol condenser which are sequentially arranged, and an inlet of the second cooling pressure reducing unit is an inlet of the second air-cooled condenser;
the tested cooler is arranged between the outlet of the second air-cooled condenser and the inlet of the second pressure reducing valve.
Preferably, the first pressurizing and heating unit comprises a plunger pump, a first pressure stabilizing tank and a first intermediate frequency furnace which are connected in sequence, and an outlet of the first pressurizing and heating unit is an outlet of the first intermediate frequency furnace;
the first cooling decompression unit comprises a first decompression valve, a first air-cooled condenser, a water-cooled condenser and a first ethylene glycol condenser which are sequentially connected, and the inlet of the first cooling decompression unit is the inlet of the first decompression valve.
Preferably, the high-pressure low-temperature system further comprises a first liquid storage tank, and two ends of the first liquid storage tank are respectively connected with the first pressurizing and heating unit and the first cooling and depressurizing unit; the low-pressure high-temperature system also comprises a second liquid storage tank, and two ends of the second liquid storage tank are respectively connected with a second pressurizing and heating unit and a second cooling and depressurizing unit; and/or the presence of a gas in the gas,
the measuring device further comprises a first vacuum pump and a second vacuum pump, wherein the first vacuum pump is used for vacuumizing the high-pressure low-temperature system, and the second vacuum pump is used for vacuumizing the low-pressure high-temperature system;
preferably, the first CO is also included2Charging system and secondary CO2A charging system, the first CO2Charging system for charging CO2Filling into the first liquid storage tank, and filling the second CO into the second liquid storage tank2Charging system for charging CO2Filling the liquid into a second liquid storage tank;
the first CO2Charging system and secondary CO2The filling systems all comprise gas cylinders, delivery pumps, filters and cold boxes; CO in the gas cylinder2The filter is sent to the filter through the delivery pump for filtering, and then the first liquid storage tank or the second liquid storage tank is filled with the filtered liquid after the cooled liquid is cooled by the cold box.
Preferably, the system further comprises a data acquisition and storage system, wherein the data acquisition and storage system comprises a temperature sensor, a pressure transmitter, a flowmeter and a data acquisition instrument;
the temperature sensor and the pressure transmitter are at least arranged at the inlet and the outlet of the measured heat regenerator and the measured cooler and are used for measuring the temperature and the pressure of the inlet and the outlet;
the flowmeter is used for measuring CO of a high-pressure low-temperature system and a low-pressure high-temperature system2Flow rate;
the data acquisition instrument is used for acquiring data of the temperature sensor, the pressure transmitter and the flowmeter.
Method for measuring supercritical CO2The method for measuring the performance of the regenerator and the cooler is applied to the measuring device and comprises the following steps:
evacuating and CO-pumping a high-pressure low-temperature system and a low-pressure high-temperature system2Filling;
high pressure low temperature system and low pressure high temperature system to CO2After being pressurized and heated, the mixture enters a heat regenerator for heat exchange;
CO after heat exchange2Decompression cooling is carried out through the first cooling decompression unit, the second cooling decompression unit and the cooler;
and collecting the temperature and pressure of the inlet and outlet of the tested reheater and the tested cooler.
Preferably, CO is treated in the high-pressure low-temperature system2The process of heating under pressure and cooling under reduced pressure comprises: CO in the first liquid storage tank2After being pressurized by a plunger pump, the CO enters a first intermediate frequency furnace for heating after passing through a first pressure stabilizing tank, then enters a heat regenerator for heat exchange, and then CO is subjected to heat exchange through a first pressure reducing valve2Reducing the pressure, entering a first air-cooled condenser to start primary cooling, then cooling by a first water-cooled condenser, finally cooling by a first ethylene glycol condenser, and returning to a first liquid storage tank;
to CO in the low pressure high temperature system2The process of heating under pressure and cooling under reduced pressure comprises: CO in the second liquid storage tank2By CO2The compressor pressurizes, enters the second intermediate frequency furnace to heat after passing through the second surge tank, then enters the heat regenerator to exchange heat, then enters the second air-cooled condenser to start primary cooling, then is cooled through the cooler, and then is used for reducing the pressure of CO through the second pressure reducing valve2And reducing the pressure, cooling by a second glycol condenser, and returning to the liquid storage tank.
Method for measuring supercritical CO2The device for the performance of the cooler comprises a pressurizing device, a heating device, a decompressing device and a cooling device which are sequentially arranged along the flowing direction of the gas;
the cooler to be tested is arranged between the heating device and the pressure reducing device.
Preferably, the pressurizing device is a compressor or a plunger pump; the heating device is an intermediate frequency furnace; the pressure reducing device is a pressure reducing valve, and the cooling device is a glycol condenser; and/or the presence of a gas in the gas,
the device also comprises an air-cooled condenser, wherein the air-cooled condenser is arranged between the intermediate frequency furnace and the pressure reducing valve, and the cooler to be tested is arranged between the air-cooled condenser and the pressure reducing valve; and/or the presence of a gas in the gas,
the device further comprises a surge tank for reducing CO at the outlet of the pressurizing device2The amplitude of the fluctuation; and/or the presence of a gas in the gas,
the device also comprises a liquid storage tank and CO2A filling system, the liquid storage tank is arranged between the cooling device and the pressurizing device and is used for providing CO for the pressurizing device2And receives CO input from the cooling device2(ii) a And/or the presence of a gas in the gas,
the device also includes a measuring device for measuring system temperature, pressure or flow.
Method for measuring supercritical CO2The method for measuring the performance of the cooler is applied to the measuring device and comprises the following steps:
evacuating and CO-charging the measuring device2Filling;
CO2after being pressurized and heated by a pressurizing device and a heating device, the mixture is precooled by an air-cooled condenser and then enters a cooler to be tested for cooling;
CO pairs by using pressure reducing device and cooling device2Further cooling and depressurizing;
and collecting the temperature and pressure of the inlet and the outlet of the cooler to be measured.
(III) advantageous effects
The invention provides a method for measuring supercritical CO2Method and apparatus for regenerator and cooler performance capable of simultaneous supercritical CO measurement2The performance of the regenerator and the cooler in the system can be measured independently.
Drawings
FIG. 1 is a diagram of the measurement of supercritical CO according to a first embodiment of the present invention2Schematic structural diagram of regenerator and cooler performance apparatus.
FIG. 2 is a diagram illustrating the measurement of supercritical CO according to a second embodiment of the present invention2Method flow diagram of regenerator and cooler performance.
FIG. 3 is a diagram illustrating the measurement of supercritical CO according to a third embodiment of the present invention2The structure of the cooler performance device is shown schematically.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
A first embodiment of the present invention provides a method for measuring supercritical CO2The device for measuring the performance of the regenerator and the cooler, wherein FIG. 1 is a schematic structural diagram of the measuring device, and as shown in FIG. 1, the device comprises a high-pressure low-temperature system, a low-temperature high-pressure system, a vacuum-pumping system and CO2The system comprises a charging system and a data acquisition and storage system.
The high pressure cryogenic system comprises: the device comprises a first plunger pump, a first pressure stabilizing tank, a first intermediate frequency furnace, a first pressure reducing valve, a first air-cooled condenser, a water-cooled condenser, a first glycol water chilling unit and a first liquid storage tank. The first plunger pump is used for pumping CO2Pressurizing to a first pressure, and using a first pressure stabilizing tank for weakening CO at the outlet of the first plunger pump2Amplitude of fluctuation, first intermediate frequency furnace for supplying CO2Heating to a first temperature, a first pressure reducing valve for introducing CO2Reduced pressure, a first air-cooled condenser, a water-cooled condenser and a first glycol condenser for cooling CO2The first liquid storage tank is used for collecting the cooled and decompressed CO2And supplies CO to the first plunger pump2. The low-pressure high-temperature system includes: CO22The compressor, the second surge tank, the second intermediate frequency furnace, the second air-cooled condenser, the second relief pressure valve, the second diethylene glycol condenser, the second diethylene glycol cooling water set, and the second liquid storage pot. CO22The compressor is used for mixing CO2Pressurizing to a second pressure, CO2The compressor can also be replaced by a plunger pump; a second surge tank for CO abatement2Compressor outlet CO2Amplitude of fluctuation, second intermediate frequency furnace for supplying CO2Heating the mixture to a second temperature to obtain a second mixture,the second air-cooled condenser is used for mixing CO2Precooling, a second pressure reducing valve for feeding CO2Reduced pressure, second glycol condenser for further cooling of CO2The second liquid storage tank is used for collecting the cooled and decompressed CO2And is CO2Compressor supplying CO2。
The first pressure is higher than the second pressure and the first temperature is lower than the second temperature, and the range of the first pressure is CO2Critical pressure of 20MPa and second pressure of CO2The critical pressure is 8MPa, the first temperature is 0-300 ℃, the second temperature is 0-500 ℃, and the second air-cooled condenser can be used for condensing CO2Precooling to 120 ℃, and enabling the first pressure reducing valve and the second pressure reducing valve to discharge CO2Reducing the pressure to 4-5 MPa and CO2And the temperature of the mixture returned to the liquid storage tank after decompression and cooling is 0-5 ℃.
The tested heat regenerator comprises two inlets and two outlets, a first inlet and a first outlet of the tested heat regenerator are respectively connected with a first intermediate frequency furnace and a first pressure reducing valve, a second inlet and a second outlet of the tested heat regenerator are respectively connected with a second intermediate frequency furnace and a second air-cooled condenser, and high-pressure and low-temperature CO in the two systems2And CO at low temperature and high pressure2Heat exchange is carried out in the regenerator.
The measured cooler is arranged between the second air-cooled condenser and the second pressure reducing valve, and CO at the outlet of the cooler2At a temperature of CO2Temperature near the critical point.
The vacuum pumping system comprises: the first vacuum pump is connected with the high-pressure low-temperature system, is arranged between the first glycol condenser and the first liquid storage tank and is used for vacuumizing the system; the second vacuum pump is connected with the low-pressure high-temperature system, is arranged between the second glycol condenser and the second liquid storage tank and is used for vacuumizing the system.
CO2The filling system is used for carrying out CO on the first liquid storage tank and the second liquid storage tank2Filling with a first CO2Charging system and secondary CO2Charging system, each CO2The charging systems each include: CO22Gas cylinder, delivery pump, filter, cold box.
The data acquisition and storage system comprises: temperature sensor, pressure transmitter, flowmeter, NI data acquisition appearance. In a high-pressure low-temperature system and a low-temperature high-pressure system, a temperature sensor and a pressure transmitter are arranged at an inlet and an outlet of each device, and a flowmeter is arranged at an outlet of a liquid storage tank. All the temperature transmitters, the pressure transmitters and the flow meters are connected to an NI data acquisition instrument through signal lines, and dynamically acquire temperature, pressure and flow signals during measurement.
The devices are all connected through 304 stainless steel pipelines, and the pipelines are wrapped by heat insulation cotton for heat insulation, so that heat loss is prevented.
The second embodiment of the invention provides a method for supercritical CO treatment by using the device2A method for regenerator and cooler performance measurement, fig. 2 is a flow chart of the method, as shown in fig. 2:
s1: the high pressure cryogenic system and the low pressure high temperature system were evacuated and CO2 charged.
Vacuumizing the high-pressure low-temperature system and the low-pressure high-temperature system by a vacuum pump, and then carrying out CO (carbon monoxide) on the high-pressure low-temperature system and the low-pressure high-temperature system2And (4) filling. First and second COs2CO in cylinders in a filling system2Conveying the mixture to a filter through a conveying pump for filtering, cooling the mixture to 0-5 ℃ through a cooling box, and filling the mixture into a first liquid storage tank and a second liquid storage tank; s2: high pressure cryogenic system and cryogenic high pressure system to CO2Pressurizing and heating the mixture, then entering a heat regenerator for heat exchange, and then carrying out heat exchange on CO2And (5) carrying out reduced pressure cooling.
Substep S21: CO of high pressure cryogenic system2The first pressurizing and heating device is used for pressurizing and heating to a first temperature and a first pressure, then the first pressurizing and heating device enters the heat regenerator for heat exchange, and finally the first decompression cooling device is used for decompression and cooling.
In the high-pressure low-temperature system: CO in the first liquid storage tank2Pressurizing to 20MPa by a first plunger pump, passing through a first pressure stabilizing tank, entering a first intermediate frequency furnace, and carrying out low-temperature CO2Heating to 300 ℃ in a first intermediate frequency furnace, entering a heat regenerator for heat exchange, and then introducing CO through a first reducing valve2The pressure is reduced to 4-5 MPa, and then the mixture entersAnd the first air-cooled condenser starts to perform primary cooling, and then is cooled by the first water-cooled condenser, the first water-cooled condenser is a primary water-cooled condenser, and finally is cooled to 0-5 ℃ by the first glycol condenser, and the glycol condenser is a secondary glycol condenser and returns to the first liquid storage tank. Wherein, the primary water-cooled condenser uses normal temperature tap water as a cooling medium, and the secondary glycol condenser uses glycol provided by a glycol water chilling unit as the cooling medium.
Substep S22: CO of low-temperature high-pressure system2Pressurizing and heating to a second temperature and a second pressure by a second pressurizing and heating device, wherein the second temperature is lower than the first temperature, and the second pressure is higher than the first pressure, and then CO2And the heat exchange is carried out in a heat regenerator, then the cooling is carried out by a cooler, and finally the pressure reduction cooling is carried out by a second pressure reduction cooling device.
In a low pressure high temperature system: CO in the second liquid storage tank2By CO2After the compressor is pressurized to 8MPa, the mixture enters a second intermediate frequency furnace through a second pressure stabilizing tank and is subjected to low-temperature CO2Heating to 500 ℃ in a second intermediate frequency furnace, entering a heat regenerator for heat exchange, entering a second air-cooled condenser for initial cooling to 120 ℃, then cooling to about 40 ℃ through a cooler, and then reducing CO through a second pressure reducing valve2Reducing the pressure to 4-5 MPa, finally cooling to 0-5 ℃ through a second glycol condenser, and returning to a second liquid storage tank. Wherein, the cooler uses normal temperature tap water as a cooling medium, and the second glycol condenser uses glycol provided by a glycol water chilling unit as the cooling medium.
S3: and (4) collecting the temperature and pressure of the inlet and the outlet of the tested reheater and cooler.
Collecting data of temperature sensors and pressure transmitters at the inlet and outlet of the heat regenerator and the cooler by an NI data collector, and analyzing the temperature difference and the pressure difference between the inlet and outlet of the heat regenerator and the cooler to obtain supercritical CO2Performance of the regenerator and cooler.
If only the supercritical CO needs to be measured2When the cooler is in performance, the high-pressure low-temperature circuit may be closed, and the steps S1, S22, and S3 may be performed.
A third embodiment of the present invention provides a method for measuring supercritical CO2The device for measuring the performance of the cooler, fig. 3 is a schematic structural diagram of the measuring device, and as shown in fig. 3, the device comprises: CO22The system comprises a compressor, a pressure stabilizing tank, an intermediate frequency furnace, a heat regenerator, an air-cooled condenser, a pressure reducing valve, a glycol condenser, a glycol water chilling unit, a liquid storage tank, a vacuum pump and CO2A filling system and a data acquisition and storage system.
The cooler to be tested is connected between the air-cooled condenser and the pressure reducing valve.
CO2The charging system includes: CO22The gas cylinder, the delivery pump, the filter, the cold box, the cooling water set.
The data acquisition and storage system comprises: temperature sensor, pressure transmitter, flowmeter, NI data acquisition appearance. And a temperature sensor and a pressure transmitter are arranged at the outlet of each device, and a flowmeter is arranged at the outlet of the liquid storage tank. All temperature transmitters, pressure transmitters and flow meters are connected to an NI data acquisition instrument through signal lines, and temperature, pressure and flow signals are acquired dynamically during experiments.
The measuring method of the cooler measuring device comprises the following steps: the measuring device is evacuated by a vacuum pump and then subjected to CO2And (4) filling. CO22CO in cylinders in a filling system2Conveying the mixture to a filter through a conveying pump for filtering, cooling the mixture to 0-5 ℃ through a cooling box, and filling the mixture into a liquid storage tank; CO in the liquid storage tank2By CO2After the pressure of the compressor is increased to 8MPa, the mixture enters an intermediate frequency furnace through a buffer tank, and CO is obtained at a low temperature2Heating to 500 deg.C in intermediate frequency furnace, cooling to 120 deg.C in air-cooled condenser, cooling to about 40 deg.C in cooler, and reducing CO by pressure reducing valve2Reducing the pressure to 4-5 MPa, and finally cooling to 0-5 ℃ through an ethylene glycol condenser, and returning to the liquid storage tank. Wherein, the cooler uses normal temperature tap water as a cooling medium, and the glycol condenser uses glycol provided by a glycol water chilling unit as the cooling medium; collecting data of temperature sensors and pressure transmitter at inlet and outlet of the heat regenerator and cooler by NI data collector, and analyzing inlet of the coolerOutlet temperature and pressure difference to obtain supercritical CO2Performance of the cooler.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (12)

1. Method for measuring supercritical CO2The device for the performance of the heat regenerator and the cooler comprises a high-pressure low-temperature system, a low-pressure high-temperature system and a data acquisition and storage system;
the high-pressure low-temperature system comprises a first pressurizing and heating unit and a first cooling and decompressing unit, wherein an outlet of the first pressurizing and heating unit is connected with a first inlet of the tested heat regenerator, and a first outlet of the tested heat regenerator is connected with an inlet of the first cooling and decompressing unit;
the low-pressure high-temperature system comprises a second pressurizing and heating unit and a second cooling and decompressing unit, an outlet of the second pressurizing and heating unit is connected with a second inlet of the tested heat regenerator, and the tested cooler is arranged between the second outlet of the tested heat regenerator and the inlet of the second cooling and decompressing unit;
the data acquisition and storage system comprises a temperature sensor and a pressure transmitter, wherein the temperature sensor and the pressure transmitter are at least arranged at the inlet and the outlet of the measured heat regenerator and the measured cooler and are used for measuring the temperature and the pressure of the inlet and the outlet.
2. The apparatus of claim 1, wherein the first pressure and heat unit is configured to introduce CO2Pressurizing and heating to a first pressure and a first temperature, the second pressurizing and heating unit being used for pressurizing and heating CO2Pressurizing and heating to a second pressure and a second temperature, the second temperature being lower than the first temperature and the second pressure being higher than the first pressure, the first cooling decompression unit and the second cooling decompression unit being used for compressing CO2And (4) decompressing and cooling.
3. The apparatus of claim 1, wherein,
the second pressurizing and heating unit comprises a compressor or a plunger pump, a second pressure stabilizing tank and a second intermediate frequency furnace which are arranged in sequence, and an outlet of the second pressurizing and heating unit is an outlet of the second intermediate frequency furnace;
the second cooling pressure reducing unit comprises a second air-cooled condenser, a second pressure reducing valve and a second glycol condenser which are sequentially arranged, and an inlet of the second cooling pressure reducing unit is an inlet of the second air-cooled condenser;
the tested cooler is arranged between the outlet of the second air-cooled condenser and the inlet of the second pressure reducing valve.
4. The apparatus of claim 1, wherein,
the first pressurizing and heating unit comprises a plunger pump, a first pressure stabilizing tank and a first intermediate frequency furnace which are sequentially connected, and an outlet of the first pressurizing and heating unit is an outlet of the first intermediate frequency furnace;
the first cooling decompression unit comprises a first decompression valve, a first air-cooled condenser, a water-cooled condenser and a first ethylene glycol condenser which are sequentially connected, and the inlet of the first cooling decompression unit is the inlet of the first decompression valve.
5. The apparatus of claim 1, wherein,
the high-pressure low-temperature system also comprises a first liquid storage tank, and two ends of the first liquid storage tank are respectively connected with the first pressurizing and heating unit and the first cooling and depressurizing unit; the low-pressure high-temperature system also comprises a second liquid storage tank, and two ends of the second liquid storage tank are respectively connected with a second pressurizing and heating unit and a second cooling and depressurizing unit; and/or the presence of a gas in the gas,
the device also comprises a first vacuum pump and a second vacuum pump, wherein the first vacuum pump is used for vacuumizing the high-pressure low-temperature system, and the second vacuum pump is used for vacuumizing the low-pressure high-temperature system;
6. the apparatus of claim 5, further comprising a first CO2 charging system and a second CO22A charging system, the first CO2Charging system for charging CO2Filling into the first liquid storage tank, and filling the second CO into the second liquid storage tank2Charging system for charging CO2Filling the liquid into a second liquid storage tank;
the first CO2Charging system and secondary CO2The filling systems all comprise gas cylinders, delivery pumps, filters and cold boxes; CO in the gas cylinder2The filter is sent to the filter through the delivery pump for filtering, and then the first liquid storage tank or the second liquid storage tank is filled with the filtered liquid after the cooled liquid is cooled by the cold box.
7. The apparatus of claim 1, wherein the data acquisition and storage system further comprises a flow meter and a data acquirer;
the flowmeter is used for measuring CO of a high-pressure low-temperature system and a low-pressure high-temperature system2Flow rate;
the data acquisition instrument is used for acquiring data of the temperature sensor, the pressure transmitter and the flowmeter.
8. Method for measuring supercritical CO2Method of regenerator and cooler performance, applied to the arrangement of any of claims 1-7, comprising the steps of:
evacuating and CO-pumping a high-pressure low-temperature system and a low-pressure high-temperature system2Filling;
high pressure low temperature system and low pressure high temperature system to CO2After being pressurized and heated, the mixture enters a heat regenerator for heat exchange;
CO after heat exchange2Decompression cooling is carried out through the first cooling decompression unit, the second cooling decompression unit and the cooler;
and collecting the temperature and pressure of the inlet and outlet of the tested reheater and the tested cooler.
9. The method of claim 8, wherein,
to CO in the high pressure low temperature system2The process of heating under pressure and cooling under reduced pressure comprises: CO in the first liquid storage tank2After being pressurized by a plunger pump, the mixture passes throughThe first pressure stabilizing tank enters a first intermediate frequency furnace for heating, then enters a heat regenerator for heat exchange, and then the first pressure reducing valve is used for reducing CO2Reducing the pressure, entering a first air-cooled condenser to start primary cooling, then cooling by a first water-cooled condenser, finally cooling by a first ethylene glycol condenser, and returning to a first liquid storage tank;
to CO in the low pressure high temperature system2The process of heating under pressure and cooling under reduced pressure comprises: CO in the second liquid storage tank2By CO2The compressor pressurizes, enters the second intermediate frequency furnace to heat after passing through the second surge tank, then enters the heat regenerator to exchange heat, then enters the second air-cooled condenser to start primary cooling, then is cooled through the cooler, and then is used for reducing the pressure of CO through the second pressure reducing valve2And reducing the pressure, cooling by a second glycol condenser, and returning to the liquid storage tank.
10. Method for measuring supercritical CO2The device for the performance of the cooler comprises a pressurizing device, a heating device, a decompressing device and a cooling device which are sequentially arranged along the flowing direction of the gas;
the cooler to be tested is arranged between the heating device and the pressure reducing device;
the device also includes a measuring device for measuring system temperature, pressure or flow.
11. The apparatus of claim 10, wherein,
the pressurizing device is a compressor or a plunger pump; the heating device is an intermediate frequency furnace; the pressure reducing device is a pressure reducing valve, and the cooling device is a glycol condenser; and/or the presence of a gas in the gas,
the device also comprises an air-cooled condenser, wherein the air-cooled condenser is arranged between the intermediate frequency furnace and the pressure reducing valve, and the cooler to be tested is arranged between the air-cooled condenser and the pressure reducing valve; and/or the presence of a gas in the gas,
the device further comprises a surge tank for reducing CO at the outlet of the pressurizing device2The amplitude of the fluctuation; and/or the presence of a gas in the gas,
the device also comprises a liquid storage tank and CO2A filling system, saidThe liquid storage tank is arranged between the cooling device and the pressurizing device and is used for providing CO for the pressurizing device2And receives CO input from the cooling device2。
12. Method for measuring supercritical CO2Method of cooler performance, applied to the device of claim 10, comprising the steps of:
evacuating the apparatus and CO2Filling;
CO2after being pressurized and heated by a pressurizing device and a heating device, the mixture is precooled by an air-cooled condenser and then enters a cooler to be tested for cooling;
CO pairs by using pressure reducing device and cooling device2Further cooling and depressurizing;
and collecting the temperature and pressure of the inlet and the outlet of the cooler to be measured.
CN201710461649.7A 2017-06-16 2017-06-16 Method for measuring supercritical CO2Apparatus and method for regenerator and cooler performance Active CN107314567B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710461649.7A CN107314567B (en) 2017-06-16 2017-06-16 Method for measuring supercritical CO2Apparatus and method for regenerator and cooler performance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710461649.7A CN107314567B (en) 2017-06-16 2017-06-16 Method for measuring supercritical CO2Apparatus and method for regenerator and cooler performance

Publications (2)

Publication Number Publication Date
CN107314567A CN107314567A (en) 2017-11-03
CN107314567B true CN107314567B (en) 2019-12-20

Family

ID=60183457

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710461649.7A Active CN107314567B (en) 2017-06-16 2017-06-16 Method for measuring supercritical CO2Apparatus and method for regenerator and cooler performance

Country Status (1)

Country Link
CN (1) CN107314567B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110136884B (en) * 2019-04-18 2020-08-25 杭州电子科技大学 Device for cooling high-temperature superconducting component
CN110044647A (en) * 2019-04-23 2019-07-23 湖南文理学院 A kind of supercritical carbon dioxide printed circuit board performance testing device of heat exchanger
CN110806035A (en) * 2019-11-06 2020-02-18 上海复璐帝流体技术有限公司 Transcritical carbon dioxide refrigeration method and device thereof
CN112211687B (en) * 2020-08-25 2022-10-28 合肥通用机械研究院有限公司 For supercritical CO 2 Multistage emptying and recycling integrated system of Brayton cycle

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001141316A (en) * 1999-11-17 2001-05-25 Sanden Corp Control mechanism for co2 refrigerating circuit
CN1144001C (en) * 1999-06-08 2004-03-31 三菱重工业株式会社 Ultra critical steam compression circulation
CN101545880A (en) * 2009-04-30 2009-09-30 上海交通大学 Device for measuring trans-critical cycle heat exchange of CO2-oil mixture
CN103308551A (en) * 2013-06-05 2013-09-18 中国石油大学(华东) Experimental device and method for measuring surface coefficient of heat transfer of supercritical carbon dioxide
CN103439356A (en) * 2013-06-05 2013-12-11 中国石油大学(华东) Experimental apparatus and method for constant-pressure specific heat measurement of supercritical carbon dioxide
CN205119578U (en) * 2015-09-10 2016-03-30 上海龙阳精密复合铜管有限公司 A detecting system for detecting heat transfer ability of regenerator

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1144001C (en) * 1999-06-08 2004-03-31 三菱重工业株式会社 Ultra critical steam compression circulation
JP2001141316A (en) * 1999-11-17 2001-05-25 Sanden Corp Control mechanism for co2 refrigerating circuit
CN101545880A (en) * 2009-04-30 2009-09-30 上海交通大学 Device for measuring trans-critical cycle heat exchange of CO2-oil mixture
CN103308551A (en) * 2013-06-05 2013-09-18 中国石油大学(华东) Experimental device and method for measuring surface coefficient of heat transfer of supercritical carbon dioxide
CN103439356A (en) * 2013-06-05 2013-12-11 中国石油大学(华东) Experimental apparatus and method for constant-pressure specific heat measurement of supercritical carbon dioxide
CN205119578U (en) * 2015-09-10 2016-03-30 上海龙阳精密复合铜管有限公司 A detecting system for detecting heat transfer ability of regenerator

Also Published As

Publication number Publication date
CN107314567A (en) 2017-11-03

Similar Documents

Publication Publication Date Title
CN107314567B (en) Method for measuring supercritical CO2Apparatus and method for regenerator and cooler performance
WO2014041654A1 (en) Pressure increasing system and method for increasing gas pressure
CN108730760B (en) Hydrogen storage tank fills hydrogen filling performance detecting system
CN105392556B (en) Pressure increasing system, and method for increasing pressure of gaseous body
CN105143799A (en) Apparatus and method for producing low-temperature compressed gas or liquefied gas
KR20160037570A (en) Power Generating System Using Supercritical Carbon Dioxide
CN103787286A (en) Nitrogen separation and liquefaction system
CN111810260B (en) Supercritical carbon dioxide split-flow recompression cycle power generation system
CN103343881A (en) Technology of BOG recovery and device thereof
CN104931248A (en) High-pressure waste energy recovery hydraulic turbine test stand and control method thereof
CN104019627A (en) Moving small-size skid-mounted LNG liquefying device
CN205156507U (en) BOG is equipment of liquefying again
JP6800204B2 (en) The process for expanding and storing the flow of liquefied natural gas from a natural gas liquefaction plant, and related plants
CN104613312A (en) BOG (Boil Off Gas) processing complete equipment and method for processing BOG by using equipment
CN104482719B (en) Cryogenic liquid returns filling device
CN103486823B (en) A kind of mobile oil field nitrogen liquefying plant
CN107677045B (en) Internal purifier research system
EP2746641B1 (en) Compression and cooling of a gas
CN115574261A (en) Carbon dioxide pressurizing and conveying device, online monitoring system thereof and mobile unit
CN105756727B (en) A kind of synthesis air supply system for test bench for gas turbine
JP5656057B2 (en) Separation process module
CN110220341B (en) Power generation and ice making combined system utilizing natural gas excess pressure
CN103754894A (en) Novel method for recycling ammonia synthesis cold energy in synthetic ammonia system
CN110847987B (en) LNG cold energy power generation and comprehensive utilization system and method for mixed working medium
CN209431073U (en) A kind of bomb charging system temperature control equipment

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant