CN116839954A - Flow heat transfer and catalytic conversion testing device of high-flow hydrogen heat exchanger - Google Patents
Flow heat transfer and catalytic conversion testing device of high-flow hydrogen heat exchanger Download PDFInfo
- Publication number
- CN116839954A CN116839954A CN202310716876.5A CN202310716876A CN116839954A CN 116839954 A CN116839954 A CN 116839954A CN 202310716876 A CN202310716876 A CN 202310716876A CN 116839954 A CN116839954 A CN 116839954A
- Authority
- CN
- China
- Prior art keywords
- hydrogen
- temperature
- helium
- low
- module
- 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.)
- Pending
Links
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 255
- 239000001257 hydrogen Substances 0.000 title claims abstract description 223
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 223
- 238000012360 testing method Methods 0.000 title claims abstract description 158
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 42
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 29
- 238000012546 transfer Methods 0.000 title claims abstract description 26
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 245
- 239000001307 helium Substances 0.000 claims abstract description 191
- 229910052734 helium Inorganic materials 0.000 claims abstract description 191
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims abstract description 186
- 239000007788 liquid Substances 0.000 claims abstract description 146
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 124
- 230000006835 compression Effects 0.000 claims abstract description 32
- 238000007906 compression Methods 0.000 claims abstract description 32
- 238000010992 reflux Methods 0.000 claims abstract description 4
- 239000012530 fluid Substances 0.000 claims description 64
- 239000007789 gas Substances 0.000 claims description 63
- 230000001105 regulatory effect Effects 0.000 claims description 50
- 238000001816 cooling Methods 0.000 claims description 31
- 238000009413 insulation Methods 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 15
- 238000001704 evaporation Methods 0.000 claims description 12
- 230000008020 evaporation Effects 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 12
- 238000005259 measurement Methods 0.000 claims description 10
- 230000000087 stabilizing effect Effects 0.000 claims description 9
- 239000003054 catalyst Substances 0.000 claims description 8
- 238000009826 distribution Methods 0.000 claims description 8
- 238000005273 aeration Methods 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 3
- 230000001502 supplementing effect Effects 0.000 claims description 3
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 2
- 238000013461 design Methods 0.000 description 8
- 238000010926 purge Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 238000009834 vaporization Methods 0.000 description 3
- 230000008016 vaporization Effects 0.000 description 3
- 238000006555 catalytic reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005262 decarbonization Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/002—Thermal testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention discloses a flow heat transfer and catalytic conversion testing device of a high-flow hydrogen heat exchanger, which is used for testing a heat exchange testing unit and comprises the following components: the device comprises a hydrogen precooling and para-hydrogen measuring module, a low-temperature testing module and a low-temperature circulating module; the low-temperature circulation module adopts at least one low-temperature helium circulation module and/or at least one helium compression circulation module; the hydrogen precooling and para-hydrogen measuring module provides high-flow hydrogen for the low-temperature testing module through a connecting pipeline and measures para-hydrogen concentration of the reflux; the low-temperature circulation module provides a high-flow helium cold source required by the heat exchange test unit for the low-temperature test module through a connecting pipeline; the heat exchange test unit is arranged in the Dewar of the low-temperature test module through a VCR connector. The testing device can reach below the liquid nitrogen temperature zone, test the performance of the multi-flow low-temperature hydrogen heat exchanger with complete structure under various working conditions, and obtain the hydrogen heat exchange, flow and conversion data between the liquid nitrogen temperature zone and the liquid hydrogen temperature zone.
Description
Technical Field
The invention belongs to the field of low-temperature hydrogen heat exchangers in a hydrogen liquefaction process, and particularly relates to a flow heat transfer and catalytic conversion testing device for a high-flow hydrogen heat exchanger.
Background
Hydrogen energy is one of the most promising energy carriers in the global decarbonization energy system at present. The liquid hydrogen has the advantages of high energy density, cleanness, environmental protection, reproducibility, high safety and the like, and is suitable for large-scale storage and transportation and application of hydrogen energy. The use of liquid hydrogen can reduce the dependence on limited resources such as traditional petroleum, natural gas and the like, reduce environmental pollution, and is an important direction for developing energy in the future. The hydrogen liquefaction technology is one of the key technologies for the development of liquid hydrogen.
Hydrogen molecules can be classified into ortho-hydrogen and para-hydrogen according to the spin state of the hydrogen nuclei. At normal temperature, hydrogen consists of 75% normal hydrogen and 25% para-hydrogen. When the temperature is reduced, the equilibrium proportion of para-hydrogen gradually increases, and the equilibrium concentration of para-hydrogen is close to 50% at the liquid nitrogen temperature until the equilibrium concentration of para-hydrogen is close to 100% at the liquid hydrogen temperature. Because of the extremely slow spontaneous conversion rate of normal para-hydrogen, normal hydrogen still contains a large amount of normal hydrogen after direct liquefaction. The exothermic heat of conversion of the normal para-hydrogen is higher than the vaporization latent heat of the liquid hydrogen, and if the normal hydrogen in the liquid hydrogen is spontaneously converted into para-hydrogen, the evaporation loss of the liquid hydrogen can be caused. Therefore, in the hydrogen liquefaction process, a high-efficiency positive para-hydrogen conversion catalyst is required to accelerate the para-hydrogen content to be more than 98%, so as to reduce the evaporation loss during the storage of liquid hydrogen.
The catalytic and heat exchange integrated low-temperature hydrogen heat exchanger is a key device of a large-scale hydrogen liquefaction technology. Compared with the scheme that the traditional catalyst and the traditional heat exchanger are arranged separately, the device is characterized in that: the integrated design of combining the heat exchange flow process and the normal-para-hydrogen conversion process by filling the catalyst in the flow channel of the heat exchanger has compact structure, small occupied space and low installation and maintenance cost; the device can simultaneously cool and convert hydrogen, greatly improve liquefaction efficiency, reduce energy loss and equipment cost, and reduce the hydrogen liquefaction energy consumption by more than 15.3 percent compared with the catalysis and heat exchange equipment which are independently arranged.
In the practical liquid hydrogen production engineering, the integrated low-temperature hydrogen heat exchanger structure is more complicated than the traditional heat exchanger, meanwhile, because of a plurality of influencing factors, the internal heat exchange, flow and catalysis processes are more difficult to predict, and the traditional heat exchanger flow heat transfer data and the correlation type heat exchanger are not applicable to the integrated heat exchanger. Therefore, the experimental data of continuous conversion is very limited, and the lack of related data also limits the application of the continuous conversion low-temperature hydrogen heat exchanger in industry. The acquisition of related data is critical to the structural design and performance prediction of the integrated heat exchanger, can provide reference for the design of normal-para-hydrogen conversion in the hydrogen liquefaction process, and promotes the application of continuous conversion in the hydrogen liquefaction industry.
Current industry testing of low temperature plate-fin heat exchangers is generally limited to heat transfer unit level, i.e., testing of the heat transfer flow characteristics of the fins. For the whole machine test, the pressure bearing and leakage rate and other aspects are generally tested only before leaving the factory, but the flow heat exchange performance is not tested, and only the whole flow is evaluated after the whole flow is assembled. The test mode is obviously simpler and coarser, and the performance of the heat exchanger cannot be accurately estimated, so that the heat transfer unit test cannot replace the whole machine test. Thus, a larger design margin is typically provided in the heat exchanger design, which results in unnecessary increases in volume, weight, and cost. Therefore, due to the lack of a test bench and data for performing low-temperature test on the whole heat exchanger, the design accuracy cannot be accurately known, and accurate data feedback cannot be provided to designers, which is disadvantageous in technical progress of the whole industry. This is also one of the pain points facing the current industry.
The Chinese patent with publication number CN 115343084A discloses a multi-temperature-zone testing device and method for a packing type plate-fin heat exchanger under a low-temperature working condition, and mainly comprises a hydrogen source, a liquid nitrogen precooler, a negative pressure liquid nitrogen precooler, a GM refrigerator, a packing type plate-fin heat exchanger with a cold-hot three-layer structure and a thermal conductivity analysis device. The hydrogen is divided into cold and hot two streams after passing through a liquid nitrogen precooler, and the hot side enters a heat channel of a heat exchanger after being precooled by a GM refrigerator; the cold side is precooled by a negative pressure liquid nitrogen precooler and a GM refrigerator and then enters a cold channel of a heat exchanger.
The presently disclosed heat exchanger testing apparatus provides a source of cooling by means of a GM refrigerator. However, the current commercial single GM refrigerator can provide only tens to hundreds of watts of refrigerating capacity within the range of 20-80K, the single daily output of the hydrogen liquefying device corresponding to the tested heat exchanger is only tens of kilograms, the single daily output of the hydrogen liquefying device in actual engineering is up to more than 2-30 tons, and the heat exchange capacity of the low-temperature hydrogen heat exchanger is up to hundreds of kilowatts. Therefore, the low-temperature hydrogen heat exchanger testing device based on the GM refrigerator disclosed at present cannot meet the large-cooling capacity requirement of the industrial-grade large-flow low-temperature hydrogen heat exchanger test. On the other hand, the hydrogen liquefaction process generally employs 2-5-stream hydrogen heat exchangers. The heat exchanger testing device disclosed at present is only suitable for the performance test of a small two-flow heat exchange module, and the comprehensive influence of factors such as flow resistance of an end socket, flow distribution uniformity and the like on the performance of the heat exchanger is not considered, so that the heat exchanger testing device cannot be used for the performance test of a multi-flow low-temperature hydrogen heat exchanger. Therefore, a high-flow low-temperature hydrogen heat exchanger performance testing device is needed to meet the key data acquisition and design improvement requirements of the catalytic and heat exchange integrated low-temperature hydrogen heat exchanger of a large-scale hydrogen liquefying device.
Disclosure of Invention
The invention provides a flow heat transfer and catalytic conversion testing device for a high-flow integrated low-temperature hydrogen heat exchanger, which can test the performance of the catalytic and heat exchange integrated hydrogen heat exchanger for a large-scale hydrogen liquefaction process and obtain a series of basic data such as temperature distribution, pressure drop, catalyst consumption, normal para-hydrogen concentration and the like under different working conditions.
A high flow hydrogen heat exchanger flow heat transfer and catalytic conversion testing device for testing a heat exchange testing unit, comprising: the device comprises a hydrogen precooling and para-hydrogen measuring module, a low-temperature testing module and a low-temperature circulating module; wherein the low-temperature circulation module adopts at least one low-temperature helium circulation module and/or at least one helium compression circulation module;
the hydrogen precooling and para-hydrogen measuring module provides high-flow hydrogen for the low-temperature testing module through a connecting pipeline and measures para-hydrogen concentration of the reflux; the low-temperature helium gas circulation module and/or the helium gas compression circulation module provide a high-flow helium gas cold source required by the heat exchange test unit for the low-temperature test module through a connecting pipeline; the heat exchange test unit in the low-temperature test module is detachably arranged in the dewar of the low-temperature test module through a VCR connector, and vacuum heat insulation treatment is carried out;
a temperature sensor is arranged near each VCR joint and is used for measuring the temperature of a cold and hot fluid inlet and outlet of the heat exchange test unit; meanwhile, a branch is led out from the vicinity of each VCR connector to the outside of the Dewar of the low-temperature testing module to be connected with a pressure sensor for measuring the pressure of a cold and hot fluid inlet and a cold and hot fluid outlet of the heat exchange testing unit;
the heat exchange test unit fills a flow channel at the hot fluid side with a positive-secondary hydrogen conversion catalyst, and hydrogen generates a flowing heat exchange process accompanied with continuous catalytic conversion in the flow channel; the cold fluid side of the heat exchange test unit is connected with a low-temperature helium gas circulation module and/or a helium gas compression circulation module; the outer wall of the heat exchange test unit and the fluid partition wall are provided with temperature measuring sites for measuring the wall temperature so as to calculate the fluid temperature distribution.
Further, the hydrogen pre-cooling and para-hydrogen measuring module comprises: the device comprises a hydrogen precooling and para-hydrogen measuring module Dewar, a high-pressure hydrogen cylinder, a hydrogen flowmeter, a hydrogen flow regulating valve, a hydrogen heat regenerator, a liquid nitrogen precooling tank, a liquid nitrogen coil pipe, a temperature bypass regulating valve, a nitrogen draining valve, a hydrogen draining valve, a measuring regulating valve, a gas chromatograph and a measuring draining valve;
the high-pressure hydrogen cylinder is sequentially connected with the hydrogen flowmeter and the hydrogen flow regulating valve in series and then is divided into two branches, wherein one branch sequentially flows through the hot fluid side of the hydrogen heat regenerator and the liquid nitrogen coil in the liquid nitrogen precooling tank; the other branch is converged with the hydrogen flowing out of the liquid nitrogen coil after flowing through the temperature bypass regulating valve, and the temperature is regulated; and then flows into a heat exchange test unit hot fluid channel in the low-temperature test module.
Hydrogen flowing out of a hot fluid channel of a heat exchange test unit in the low-temperature test module enters the hydrogen precooling and para-hydrogen measurement module, and is safely emptied through a hydrogen emptying valve after flowing through a cold fluid side of the hydrogen heat regenerator; a branch is led out in front of the hydrogen evacuation valve and is sequentially connected with the measurement regulating valve, the gas chromatograph and the measurement evacuation valve in series, and then the hydrogen evacuation valve is safely evacuated.
Further, the hydrogen heat regenerator, the liquid nitrogen precooling tank, the liquid nitrogen coil pipe and the temperature bypass regulating valve are all placed in a hydrogen precooling and para-hydrogen measuring module Dewar, and vacuum heat insulation treatment is carried out;
the liquid nitrogen precooling tank adopts multilayer heat insulation, and nitrogen generated by evaporation is discharged through a nitrogen emptying valve.
Further, the cryogenic helium cycle module comprises: the device comprises a low-temperature helium circulation module Dewar, a high-pressure helium tank, a helium tank air supplementing valve, a circulation filling valve, a precooling tank, a liquid nitrogen coil pipe, a temperature bypass regulating valve, a low-temperature fan and a nitrogen emptying valve;
the high-flow helium flowing out of the cold fluid channel of the heat exchange test unit in the low-temperature test module enters the low-temperature helium circulation module, flows through the liquid nitrogen coil pipe and the low-temperature fan in the precooling tank in sequence, and flows into the cold fluid channel of the heat exchange test unit in the low-temperature test module to form a circulation loop;
the helium tank aeration valve, the high-pressure helium tank and the circulating filling valve are sequentially connected and then connected with a helium circulating loop before helium flows into the precooling tank; a branch is led out before helium enters the precooling tank, flows through the temperature bypass regulating valve and then is converged with helium flowing out of the liquid nitrogen coil pipe, and temperature regulation is carried out.
Further, the precooling tank, the liquid nitrogen coil, the temperature bypass regulating valve and the low-temperature fan are all placed in a low-temperature helium gas circulation module Dewar, and vacuum heat insulation treatment is carried out;
the precooling tank adopts multilayer heat insulation, and nitrogen generated by evaporation is discharged through a nitrogen emptying valve.
Optionally, the pre-cooling tank adopts a liquid nitrogen pre-cooling tank, a liquid hydrogen pre-cooling tank or a combination of the two.
Further, the helium gas compression cycle module includes: the device comprises a helium compression circulation module Dewar, a helium secondary heat regenerator, a helium primary heat regenerator, a compressor, a high-pressure helium tank, a pressure reducing valve, a helium tank air supplementing valve, a helium pressure stabilizing tank, a liquid nitrogen precooling tank, a liquid nitrogen coil pipe, a temperature bypass regulating valve, a liquid hydrogen precooling tank, a liquid hydrogen coil pipe, a liquid hydrogen loop valve, a hydrogen evacuation valve and a nitrogen evacuation valve;
the high-flow helium flowing out of the cold fluid channel of the heat exchange test unit in the low-temperature test module enters the helium compression circulation module; the high-flow helium sequentially flows through a helium secondary heat regenerator cold fluid channel, a helium primary heat regenerator cold fluid channel, a compressor, a helium pressure stabilizing tank, a helium primary heat regenerator hot fluid channel, a liquid nitrogen coil in a liquid nitrogen precooling tank, a helium secondary heat regenerator hot fluid channel, a liquid hydrogen coil in a liquid hydrogen precooling tank and a liquid hydrogen loop valve and then flows into the cold fluid channel of a heat exchange test unit in the low-temperature test module to form a circulation loop;
the helium tank air compensating valve, the high-pressure helium tank, the pressure reducing valve and the helium pressure stabilizing tank are sequentially connected with each other to maintain the pressure of circulating helium; and after the helium leaves the liquid nitrogen coil pipe in the liquid nitrogen precooling tank, another branch is led out, and the helium is connected to a liquid hydrogen loop valve back pipeline through a temperature bypass regulating valve to regulate the temperature.
Further, the helium secondary heat regenerator, the helium primary heat regenerator, the liquid nitrogen precooling tank, the liquid nitrogen coil pipe, the temperature bypass regulating valve, the liquid hydrogen precooling tank, the liquid hydrogen coil pipe and the liquid hydrogen loop valve are all placed in a helium compression circulation module Dewar, and vacuum heat insulation treatment is carried out;
the liquid nitrogen precooling tank adopts multilayer heat insulation, and nitrogen generated by evaporation is discharged through a nitrogen emptying valve; the liquid hydrogen precooling tank adopts multi-layer heat insulation, and nitrogen generated by evaporation is discharged through a hydrogen evacuation valve.
When the heat exchange test unit in the low-temperature test module is a multi-flow type normal-para-hydrogen conversion low-temperature heat exchanger, a plurality of low-temperature helium gas circulation modules, a plurality of helium gas compression circulation modules or a combination mode of the low-temperature helium gas circulation modules and the helium gas compression circulation modules are adopted to provide helium gas for the low-temperature test module together.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention is based on low-temperature helium circulation and adopts liquid nitrogen or liquid hydrogen as a cold source, and can perform flow heat transfer and catalytic conversion test under large flow for the low-temperature hydrogen heat exchanger which is more similar to the actual large-scale hydrogen liquefaction scale. Meanwhile, a helium refrigerating unit is adopted, so that a low-temperature cold source is obtained, a hydrogen cold source is avoided, the hydrogen consumption is reduced, and the safety of the system is improved.
2. Compared with the method which directly uses liquid refrigerant as the circulating working medium, the method avoids potential influence of instability of gas-liquid phase change in the cold fluid channel on performance test of the heat exchanger; in addition, helium has a higher specific heat capacity than nitrogen by more than twice. The mass flow of the circulating working medium can be effectively reduced, so that the circulating input work is reduced.
3. The invention can realize the wide-range adjustment of temperature and flow, the inlet state of hot fluid hydrogen in the heat exchange test unit can be adjusted through the hydrogen flow adjusting valve and the temperature bypass adjusting valve, and the decoupling of the temperature and flow working condition parameters is realized. The cold quantity of different temperatures provided by the cold fluid can be regulated through the flow of helium circulation and the temperature bypass regulating valve, so that heat exchange flow and catalytic conversion basic data of the low-temperature hydrogen heat exchanger under different working conditions in the process of being closer to actual large-scale hydrogen liquefaction are measured.
4. The heat exchange test unit is connected with the pipeline through the VCR interface and can be used for replacing samples, and comprises a multi-stream heat exchanger, and the heat exchange units of different structures and different types are tested, so that relatively wide relevant basic data are obtained.
5. The invention can be used for testing the performance of the multi-flow low-temperature hydrogen heat exchanger. The heat exchanger testing device disclosed at present is only suitable for performance testing of a small two-flow heat exchange module, and the comprehensive influence of factors such as flow resistance of an end socket, flow distribution uniformity and the like on the performance of the heat exchanger is not considered.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a high flow hydrogen heat exchanger flow heat transfer and catalytic conversion testing device employing a low temperature helium gas circulation module in accordance with the present invention;
FIG. 2 is a schematic diagram of the overall structure of a flow heat transfer and catalytic conversion testing device for a high-flow hydrogen heat exchanger employing a helium compression cycle module according to the present invention.
In the figure: 100-hydrogen precooling and para-hydrogen measuring module Dewar, 101-high pressure hydrogen cylinder, 102-hydrogen flowmeter, 103-hydrogen flow regulating valve, 104-hydrogen regenerator, 105-liquid nitrogen precooling tank, 106-liquid nitrogen coil, 107-temperature bypass regulating valve, 108-nitrogen evacuation valve, 109-hydrogen evacuation valve, 110-measuring regulating valve, 111-gas chromatograph, 112-measuring evacuation valve, 200-low temperature measuring module Dewar, 201-heat exchanging test unit, 202-VCR connector, 300-low temperature helium circulation module Dewar, 301-high pressure helium tank, 302-helium tank air compensating valve, 303-circulation filling valve, 304-precooling tank, 305-liquid nitrogen coil, 306-temperature bypass regulating valve, 307-low temperature fan, 308-nitrogen evacuation valve, 400-helium compression circulation module Dewar, 401-helium secondary regenerator, 402-helium primary regenerator, 403-compressor, 404-high pressure helium tank, 405-pressure reducing valve, 406-gas tank air compensating valve, liquid nitrogen-liquid nitrogen pressure stabilizing tank, 408-precooling tank, 409-helium gas compensating valve, 410-nitrogen bypass regulating valve, 410-hydrogen return valve, 415-hydrogen gas circulation valve, 411-liquid nitrogen return valve, hydrogen return valve, and evacuation valve.
Detailed Description
The invention will be described in further detail with reference to the drawings and examples, it being noted that the examples described below are intended to facilitate the understanding of the invention and are not intended to limit the invention in any way.
The invention provides a high-flow hydrogen heat exchanger flow heat transfer and catalytic conversion testing device, which is used for obtaining relevant data of flow heat transfer and catalytic conversion performance of hydrogen at low temperature in order to achieve experimental conditions from a liquid hydrogen temperature region to a liquid nitrogen temperature region and higher, and providing references for industrial design of the low-temperature hydrogen heat exchanger. A series of basic data such as temperature distribution, pressure drop, catalyst consumption, concentration of normal para-hydrogen and the like under different working conditions can be obtained through the test platform, and comprehensive influences of factors such as flow resistance of the seal head, flow distribution uniformity and the like on the performance of the heat exchanger are explored.
Example 1
As shown in fig. 1, a flow heat transfer and catalytic conversion testing device for a high-flow hydrogen heat exchanger using a low-temperature helium gas circulation module is used for testing a heat exchange testing unit 201, and includes: a hydrogen precooling and para-hydrogen measuring module 1, a low-temperature testing module 2 and a low-temperature helium gas circulating module 3. The hydrogen precooling and para-hydrogen measuring module 1 provides high-flow hydrogen for the low-temperature testing module 2 through a connecting pipeline and measures para-hydrogen concentration of the reflux; the low-temperature helium gas circulation module 3 provides a high-flow helium gas cold source required by the heat exchange test unit 201 for the low-temperature test module 2 through a connecting pipeline; the heat exchange test unit 201 is detachably disposed in the cryogenic test module dewar 200 through the VCR joint 202 in the cryogenic test module 2, and vacuum insulation is performed. A temperature sensor is disposed near each VCR joint 202 to measure the temperature of the hot and cold fluid inlet and outlet of the heat exchange test unit 201. A branch is led out from the vicinity of each VCR joint 202 to the outside of the low temperature test module dewar 200 to connect with a pressure sensor for measuring the pressure of the cold and hot fluid inlet and outlet of the heat exchange test unit 201.
The heat exchange test unit 201 fills the flow channel at the hot fluid side with the positive para-hydrogen conversion catalyst, and the hydrogen generates a flowing heat exchange process accompanied with continuous catalytic conversion in the flow channel; the cold fluid side of the heat exchange test unit 201 is connected with the low-temperature helium gas circulation module 3; and temperature measuring points are arranged on the outer wall of the heat exchange test unit 201 and the fluid partition wall and used for measuring the wall surface temperature so as to calculate the fluid temperature distribution.
The hydrogen precooling and para-hydrogen measuring module 1 comprises: the hydrogen precooling and para-hydrogen measuring module Dewar 100, a high-pressure hydrogen cylinder 101, a hydrogen flowmeter 102, a hydrogen flow regulating valve 103, a hydrogen heat regenerator 104, a liquid nitrogen precooling tank 105, a liquid nitrogen coil 106, a temperature bypass regulating valve 107, a nitrogen evacuation valve 108, a hydrogen evacuation valve 109, a measuring regulating valve 110, a gas chromatograph 111 and a measuring evacuation valve 112.
The high-pressure hydrogen cylinder 101 is sequentially connected with a hydrogen flowmeter 102 and a hydrogen flow regulating valve 103 in series and then divided into two branches, wherein one branch sequentially flows through a hot fluid side of the hydrogen regenerator 104 and a liquid nitrogen coil 106 in a liquid nitrogen precooling tank 105; the other branch is converged with the hydrogen flowing out of the liquid nitrogen coil 106 after flowing through the temperature bypass regulating valve 107, and the temperature is regulated; and then flows into the thermal fluid channel of the heat exchange test unit 201 in the low temperature test module 2. The flow rate and pressure of the hydrogen thermal fluid entering the heat exchange test unit 201 from the high-pressure hydrogen cylinder 101 as a gas source are regulated and controlled by the hydrogen flowmeter 102 and the hydrogen flow rate regulating valve 103. With the temperature bypass regulator valve 107 fully closed, the temperature of the hydrogen entering the heat exchange test unit 201 is about 78K. The temperature entering the heat exchange test unit 201 is adjusted by adjusting the opening of the temperature bypass adjusting valve 107 so as to meet the test working condition of more than 78K.
Hydrogen flowing out of a hot fluid channel of the heat exchange test unit 201 in the low-temperature test module 2 enters the hydrogen precooling and para-hydrogen measurement module 1; the cold fluid side flowing through the hydrogen regenerator 104 is safely exhausted through a hydrogen exhaust valve 109; a branch is led out in front of the hydrogen evacuation valve 109 and is sequentially connected with a measurement adjusting valve 110, a gas chromatograph 111 and a measurement evacuation valve 112 in series for safe evacuation.
The gas chromatograph 111 measures the concentration of normal para-hydrogen in the hydrogen gas flowing out from the low-temperature test module 2 into the gas chromatograph 111 using the standard hydrogen in the high-pressure hydrogen cylinder 101 as a carrier gas.
The hydrogen heat regenerator 104, the liquid nitrogen precooling tank 105, the liquid nitrogen coil 106 and the temperature bypass regulating valve 107 in the hydrogen precooling and para-hydrogen measuring module 1 are all arranged in the hydrogen precooling and para-hydrogen measuring module Dewar 100, and are subjected to vacuum heat insulation treatment. The liquid nitrogen pre-cooling tank 105 employs a multi-layer insulation and discharges nitrogen generated by evaporation through a nitrogen purge valve 108.
A cryogenic helium cycle module 3 comprising: cryogenic helium cycle module Dewar 300, high pressure helium tank 301, helium tank make-up valve 302, cycle fill valve 303, liquid nitrogen pre-chill tank 304, liquid nitrogen coil 305, temperature bypass regulator valve 306, cryogenic fan 307, nitrogen purge valve 308.
The high-flow helium flowing out of the cold fluid channel of the heat exchange test unit 201 in the low-temperature test module 2 enters the low-temperature helium circulation module 3; the high-flow helium gas flows into a cold fluid channel of the heat exchange test unit 201 in the low-temperature test module 2 after sequentially flowing through the liquid nitrogen coil 305 and the low-temperature fan 307 in the liquid nitrogen precooling tank 304, so as to form a circulation loop. The flow rate of the helium circulation loop is indirectly controlled by adjusting the rotation speed of the low-temperature fan 307.
The helium tank aeration valve 302, the high-pressure helium tank 301 and the circulating filling valve 303 are sequentially connected, and then a helium circulation loop is connected before helium flows into the liquid nitrogen precooling tank 304. The high-pressure helium tank 301 is maintained in a high-pressure state by realizing the air supplement of the high-pressure helium tank 301 through the helium tank air supplement valve 302; the high pressure helium tank 301 charges the helium circulation circuit with high pressure helium of the operating pressure measured by the heat exchange test unit 201 through the circulation charging valve 303 before the system is operated.
A branch is led out before helium enters the liquid nitrogen precooling tank 304, flows through the temperature bypass regulating valve 306, and then is combined with helium flowing out of the liquid nitrogen coil 305 for temperature regulation. With the temperature bypass regulator valve 306 fully closed, the helium gas entering the cold path of the heat exchange test unit 201 is at a temperature of about 78K in the liquid nitrogen temperature zone. The temperature entering the heat exchange test unit 201 is adjusted by adjusting the opening of the temperature bypass adjusting valve 306 so as to meet the test working condition of more than 78K.
The liquid nitrogen precooling tank 304, the liquid nitrogen coil pipe 305, the temperature bypass regulating valve 306 and the low-temperature fan 307 in the low-temperature helium gas circulation module 3 are all placed in the low-temperature helium gas circulation module dewar 300, and vacuum heat insulation treatment is carried out. The liquid nitrogen pre-chill tank 304 employs multiple layers of insulation and discharges the nitrogen generated by the vaporization through a nitrogen purge valve 308.
As a modification, the liquid nitrogen pre-cooling tank 304 in the cryogenic helium gas circulation module 3 may be replaced with a liquid hydrogen pre-cooling tank, so that the cryogenic helium gas circulation module 3 may provide a lower temperature zone of cryogenic helium gas. Or a liquid hydrogen pre-cooling tank may be connected in series after the liquid nitrogen pre-cooling tank 304 so that the cryogenic helium gas circulation module 3 may provide cryogenic helium gas in a lower temperature zone. The temperature of helium entering the cold aisle of the heat exchange test unit 201 can be in the range of 20-80K by adjusting the temperature bypass regulator valve 306.
The hydrogen regenerator 104 in the hydrogen pre-cooling and para-hydrogen measurement module 1 adopts a spiral double pipe heat exchanger. The inside of the tube is hot fluid, and the outside of the tube is cold fluid.
The heat exchange test unit 201 in the low temperature test module 2 can be replaced by various types of normal-para-hydrogen conversion low temperature heat exchangers.
Example 2
As shown in fig. 2, the flow heat transfer and catalytic conversion testing device of the high-flow hydrogen heat exchanger adopts a helium gas compression circulation module. In this embodiment, the difference from embodiment 1 described above is that the low-temperature helium gas circulation module 3 is replaced with a helium gas compression circulation module 4. Other component configurations are consistent with those of embodiment 1, and will not be described in detail herein.
Helium gas compression cycle module 4, comprising: helium compression cycle module Dewar 400, helium secondary regenerator 401, helium primary regenerator 402, compressor 403, high pressure helium tank 404, pressure reducing valve 405, helium tank make-up valve 406, helium surge tank 407, liquid nitrogen pre-cooling tank 408, liquid nitrogen coil 409, temperature bypass regulating valve 410, liquid hydrogen pre-cooling tank 411, liquid hydrogen coil 412, liquid hydrogen loop valve 413, hydrogen evacuation valve 414, nitrogen evacuation valve 415.
The high-flow helium flowing out of the cold fluid channel of the heat exchange test unit 201 in the low-temperature test module 2 enters the helium compression circulation module 4; the high-flow helium sequentially flows through a cold fluid channel of the helium secondary heat regenerator 401, a cold fluid channel of the helium primary heat regenerator 402, a compressor 403, a helium pressure stabilizing tank 407, a hot fluid channel of the helium primary heat regenerator 402, a liquid nitrogen coil 409 in a liquid nitrogen pre-cooling tank 408, a hot fluid channel of the helium secondary heat regenerator 401, a liquid hydrogen coil 412 in a liquid hydrogen pre-cooling tank 411 and a liquid hydrogen loop valve 413, and then flows into a cold fluid channel of the heat exchange test unit 201 in the low-temperature test module 2 to form a circulation loop.
The helium tank air compensating valve 406, the high-pressure helium tank 404, the pressure reducing valve 405 and the helium pressure stabilizing tank 407 are sequentially connected with the working condition helium pressure measured by the heat exchange test unit 201. The high-pressure helium tank 301 is supplied with air by a helium tank supply valve 406.
Wherein, after the helium leaves the liquid nitrogen coil 409 in the liquid nitrogen pre-cooling tank 408, another branch is led out, and the helium is connected into a liquid hydrogen loop valve 413 through a temperature bypass regulating valve 410 and then is subjected to temperature regulation. In the helium gas compression circulation module 4, the temperature bypass regulating valve 410 is closed, the liquid hydrogen loop valve 413 is opened, and the helium gas circulates to reach the temperature of the liquid hydrogen temperature zone of 20K; closing the liquid hydrogen loop valve 413, opening the temperature bypass regulating valve 410, and circulating helium gas to reach the liquid nitrogen temperature zone temperature of 80K; helium circulation can be adjusted between the liquid nitrogen to liquid hydrogen temperature zone 80-20K by adjusting the temperature bypass adjustment valve 410 and the liquid hydrogen loop valve 413.
The helium secondary heat regenerator 401, the helium primary heat regenerator 402, the liquid nitrogen precooling tank 408, the liquid nitrogen coil 409, the temperature bypass regulating valve 410, the liquid hydrogen precooling tank 411, the liquid hydrogen coil 412 and the liquid hydrogen loop valve 413 in the helium compression circulation module 4 are all placed in the helium compression circulation module Dewar 400, and are subjected to vacuum heat insulation treatment. The liquid nitrogen pre-chill tank 408 employs multiple layers of insulation and discharges nitrogen generated by vaporization through a nitrogen purge valve 415. The liquid hydrogen pre-cooling tank 411 employs multi-layer heat insulation, and discharges nitrogen generated by evaporation through a hydrogen evacuation valve 414.
The helium primary regenerator 402 and the helium secondary regenerator 401 in the helium compression cycle module 4 are both spiral double pipe heat exchangers. The inside of the tube is hot fluid, and the outside of the tube is cold fluid.
Example 3
The difference from the above embodiments 1 and 2 is that in this embodiment, a plurality of low-temperature helium gas circulation modules 3, a plurality of helium gas compression circulation modules 4, or a combination of the low-temperature helium gas circulation modules 3 and the helium gas compression circulation modules 4 is adopted to provide helium gas for the low-temperature test module 2 together so as to meet the test requirement of the multi-stream heat exchanger. The heat exchange test unit 201 in the low temperature test module 2 can be replaced by various types of normal-para-hydrogen conversion low temperature heat exchangers, including multi-stream heat exchangers. Other component configurations are the same as those of the above embodiments 1 and 2, and will not be described here again.
The foregoing embodiments have described in detail the technical solution and the advantages of the present invention, it should be understood that the foregoing embodiments are merely illustrative of the present invention and are not intended to limit the invention, and any modifications, additions and equivalents made within the scope of the principles of the present invention should be included in the scope of the invention.
Claims (9)
1. A high flow hydrogen heat exchanger flow heat transfer and catalytic conversion testing device for testing a heat exchange testing unit (201), comprising: the device comprises a hydrogen precooling and para-hydrogen measuring module (1), a low-temperature testing module (2) and a low-temperature circulating module; wherein the low-temperature circulation module adopts at least one low-temperature helium circulation module (3) and/or at least one helium compression circulation module (4);
the hydrogen precooling and para-hydrogen measuring module (1) provides high-flow hydrogen for the low-temperature testing module (2) through a connecting pipeline and measures para-hydrogen concentration of the reflux; the low-temperature helium gas circulation module (3) and/or the helium gas compression circulation module (4) provide a high-flow helium gas cold source required by the heat exchange test unit (201) for the low-temperature test module (2) through a connecting pipeline; a heat exchange test unit (201) in the low-temperature test module (2) is detachably arranged in a low-temperature test module Dewar (200) through a VCR connector (202) and is subjected to vacuum heat insulation treatment;
a temperature sensor is arranged near each VCR joint (202) and is used for measuring the temperature of a cold and hot fluid inlet and a hot fluid outlet of the heat exchange test unit (201); meanwhile, a branch is led out from the vicinity of each VCR connector (202) to the outside of the low-temperature test module Dewar (200) to be connected with a pressure sensor for measuring the pressure of a cold and hot fluid inlet and outlet of the heat exchange test unit (201);
the heat exchange test unit (201) is filled with a positive para-hydrogen conversion catalyst in a flow channel at the hot fluid side, and hydrogen generates a flowing heat exchange process accompanied with continuous catalytic conversion in the flow channel; the cold fluid side of the heat exchange test unit (201) is connected with the low-temperature helium gas circulation module (3) and/or the helium gas compression circulation module (4); the outer wall and the fluid partition wall of the heat exchange test unit (201) are provided with temperature measuring points for measuring the wall temperature so as to calculate the fluid temperature distribution.
2. The flow heat transfer and catalytic conversion testing device of a high-flow hydrogen heat exchanger according to claim 1, wherein the hydrogen pre-cooling and para-hydrogen measuring module (1) comprises: the device comprises a hydrogen precooling and para-hydrogen measuring module Dewar (100), a high-pressure hydrogen cylinder (101), a hydrogen flowmeter (102), a hydrogen flow regulating valve (103), a hydrogen regenerator (104), a liquid nitrogen precooling tank (105), a liquid nitrogen coil pipe (106), a temperature bypass regulating valve (107), a nitrogen draining valve (108), a hydrogen draining valve (109), a measuring regulating valve (110), a gas chromatograph (111) and a measuring draining valve (112);
the high-pressure hydrogen cylinder (101) is sequentially connected with a hydrogen flowmeter (102) and a hydrogen flow regulating valve (103) in series and then is divided into two branches, wherein one branch sequentially flows through a hot fluid side of the hydrogen heat regenerator (104) and a liquid nitrogen coil (106) in the liquid nitrogen precooling tank (105); the other branch is converged with the hydrogen flowing out of the liquid nitrogen coil pipe (106) after flowing through the temperature bypass regulating valve (107) to regulate the temperature; then flows into a hot fluid channel of a heat exchange test unit (201) in the low-temperature test module (2);
hydrogen flowing out of a hot fluid channel of a heat exchange test unit (201) in the low-temperature test module (2) enters the hydrogen pre-cooling and secondary hydrogen measurement module (1), flows through a cold fluid side of the hydrogen heat regenerator (104) and is safely exhausted through the hydrogen exhaust valve (109); a branch is led out in front of the hydrogen evacuation valve (109) and is sequentially connected with a measurement regulating valve (110), a gas chromatograph (111) and a measurement evacuation valve (112) in series for safe evacuation.
3. The device for testing the flow heat transfer and the catalytic conversion of the high-flow hydrogen heat exchanger according to claim 2, wherein the hydrogen heat regenerator (104), the liquid nitrogen precooling tank (105), the liquid nitrogen coil pipe (106) and the temperature bypass regulating valve (107) are all arranged in a hydrogen precooling and para-hydrogen measuring module Dewar (100) and are subjected to vacuum heat insulation treatment;
the liquid nitrogen precooling tank (105) adopts multilayer heat insulation, and nitrogen generated by evaporation is discharged through a nitrogen emptying valve (108).
4. The high flow hydrogen heat exchanger flow heat transfer and catalytic conversion testing device of claim 1 wherein the cryogenic helium gas circulation module (3) comprises: the low-temperature helium circulation module Dewar (300), a high-pressure helium tank (301), a helium tank air compensating valve (302), a circulation filling valve (303), a pre-cooling tank, a liquid nitrogen coil pipe (305), a temperature bypass regulating valve (306), a low-temperature fan (307) and a nitrogen emptying valve (308);
the high-flow helium flowing out of the cold fluid channel of the heat exchange test unit (201) in the low-temperature test module (2) enters the low-temperature helium circulation module (3), flows through the liquid nitrogen coil pipe (305) and the low-temperature fan (307) in the pre-cooling tank in sequence, and flows into the cold fluid channel of the heat exchange test unit (201) in the low-temperature test module (2) to form a circulation loop;
the helium tank aeration valve (302), the high-pressure helium tank (301) and the circulating filling valve (303) are sequentially connected, and then a helium circulating loop is connected before helium flows into the precooling tank; a branch is led out before helium enters the precooling tank, flows through a temperature bypass regulating valve (306) and then is combined with helium flowing out of a liquid nitrogen coil (305) to regulate the temperature.
5. The device for testing the flow heat transfer and the catalytic conversion of the high-flow hydrogen heat exchanger according to claim 4, wherein the precooling tank, the liquid nitrogen coil pipe (305), the temperature bypass regulating valve (306) and the low-temperature fan (307) are all placed in a low-temperature helium circulation module Dewar (300) and are subjected to vacuum heat insulation treatment;
wherein the pre-cooling tank is insulated by multiple layers, and nitrogen generated by evaporation is discharged through a nitrogen discharge valve (308).
6. The high flow hydrogen heat exchanger flow heat transfer and catalytic conversion testing device of claim 5, wherein the pre-cooling tank employs a liquid nitrogen pre-cooling tank (304), a liquid hydrogen pre-cooling tank, or a combination thereof.
7. The high flow hydrogen heat exchanger flow heat transfer and catalytic conversion testing device of claim 1 wherein the helium gas compression cycle module (4) comprises: the helium compression circulation module Dewar (400), a helium secondary heat regenerator (401), a helium primary heat regenerator (402), a compressor (403), a high-pressure helium tank (404), a pressure reducing valve (405), a helium tank air supplementing valve (406), a helium pressure stabilizing tank (407), a liquid nitrogen precooling tank (408), a liquid nitrogen coil (409), a temperature bypass regulating valve (410), a liquid hydrogen precooling tank (411), a liquid hydrogen coil (412), a liquid hydrogen loop valve (413), a hydrogen draining valve (414) and a nitrogen draining valve (415);
the high-flow helium flowing out of a cold fluid channel of a heat exchange test unit (201) in the low-temperature test module (2) enters a helium compression circulation module (4); the high-flow helium sequentially flows through a cold fluid channel of a helium secondary heat regenerator (401), a cold fluid channel of a helium primary heat regenerator (402), a compressor (403), a helium pressure stabilizing tank (407), the hot fluid channel of the helium primary heat regenerator (402), a liquid nitrogen coil (409) in a liquid nitrogen pre-cooling tank (408), the hot fluid channel of the helium secondary heat regenerator (401), a liquid hydrogen coil (412) in a liquid hydrogen pre-cooling tank (411) and a liquid hydrogen loop valve (413) and then flows into a cold fluid channel of a heat exchange test unit (201) in a low-temperature test module (2) to form a circulation loop;
the helium tank air compensating valve (406), the high-pressure helium tank (404), the pressure reducing valve (405) and the helium pressure stabilizing tank (407) are sequentially connected with each other to maintain the circulating helium pressure; and after the helium leaves a liquid nitrogen coil pipe (409) in the liquid nitrogen precooling tank (408), the other branch is led out, and the helium is connected into a liquid hydrogen loop valve (413) through a temperature bypass regulating valve (410) and then is subjected to temperature regulation.
8. The high-flow hydrogen heat exchanger flow heat transfer and catalytic conversion testing device according to claim 7, wherein the helium secondary heat regenerator (401), the helium primary heat regenerator (402), the liquid nitrogen pre-cooling tank (408), the liquid nitrogen coil (409), the temperature bypass regulating valve (410), the liquid hydrogen pre-cooling tank (411), the liquid hydrogen coil (412) and the liquid hydrogen loop valve (413) are all placed in a helium compression circulation module dewar (400) and are subjected to vacuum heat insulation treatment;
the liquid nitrogen precooling tank (408) adopts multilayer heat insulation, and nitrogen generated by evaporation is discharged through the nitrogen emptying valve (415); the liquid hydrogen pre-cooling tank (411) adopts multi-layer heat insulation, and discharges nitrogen generated by evaporation through a hydrogen evacuation valve (414).
9. The high flow hydrogen heat exchanger flow heat transfer and catalytic conversion testing device according to claim 1, wherein when the heat exchange testing unit (201) in the low temperature testing module (2) is a multi-flow normal para-hydrogen conversion low temperature heat exchanger, a plurality of low temperature helium gas circulation modules (3), a plurality of helium gas compression circulation modules (4) or a combination of the low temperature helium gas circulation modules (3) and the helium gas compression circulation modules (4) are adopted to jointly provide helium gas for the low temperature testing module (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310716876.5A CN116839954A (en) | 2023-06-16 | 2023-06-16 | Flow heat transfer and catalytic conversion testing device of high-flow hydrogen heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310716876.5A CN116839954A (en) | 2023-06-16 | 2023-06-16 | Flow heat transfer and catalytic conversion testing device of high-flow hydrogen heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116839954A true CN116839954A (en) | 2023-10-03 |
Family
ID=88169782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310716876.5A Pending CN116839954A (en) | 2023-06-16 | 2023-06-16 | Flow heat transfer and catalytic conversion testing device of high-flow hydrogen heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116839954A (en) |
-
2023
- 2023-06-16 CN CN202310716876.5A patent/CN116839954A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113030367B (en) | Device for testing catalytic performance of catalyst for normal-para-hydrogen reaction | |
| CN108918175B (en) | Thermal performance test system | |
| CN114113472A (en) | Method for realizing performance test of catalytic conversion reaction of multiple para-hydrogen | |
| Wang et al. | Multi-objective optimization design and performance evaluation of a novel multi-stream intermediate fluid vaporizer with cold energy recovery | |
| CN111896578A (en) | Superfluid helium dewar low-temperature constant-temperature testing device | |
| CN116972340A (en) | Integrated management system and method for liquid hydrogen aircraft | |
| CN116839954A (en) | Flow heat transfer and catalytic conversion testing device of high-flow hydrogen heat exchanger | |
| CN113030151A (en) | Device and method for testing liquefaction rate of low-temperature gas liquefaction device | |
| Li et al. | Experimental study on heat and mass transfer performance of falling film absorption over a vertical tube using LiCl solution | |
| CN117028838A (en) | Integrated regulating device and method for liquid hydrogen storage and supply system | |
| WO2023240859A1 (en) | Performance experiment system for closed brayton cycle | |
| CN218470198U (en) | Flow and heat transfer performance testing system of integrated heat exchanger | |
| CN115274154B (en) | Thermodynamic and hydraulic comprehensive experiment system and method for small helium-xenon cooling reactor | |
| CN213955679U (en) | Test device for measuring performance of supercritical carbon dioxide heat exchanger and material | |
| CN114965566A (en) | Universal experiment bench and experiment method for high-temperature heat pipe starting and flowing heat transfer | |
| Anselmi et al. | An Overview of Initial Operational Experience With the Closed-Loop sCO2 Test Facility at Cranfield University | |
| CN116792668B (en) | High-integration double-layer vacuum heat-insulating cold box structure for liquid hydrogen flow metering | |
| Bi et al. | Experimental investigation and simulation on a small-scale open hydrogen liquefaction system with stepwise cooling | |
| Liu et al. | Experimental Investigation of Heat Transfer Characteristics on PCHE Precooler in the Brayton Cycle for Supercritical CO 2 Waste Heat Recovery | |
| CN117723327B (en) | 2K negative pressure visual heat exchanger test platform, system and use method | |
| Ahuja et al. | Application of matrix heat exchangers to thermomechanical exergy recovery from liquid hydrogen | |
| CN118501331A (en) | System and method for testing conversion of normal para-hydrogen | |
| CN116429947A (en) | Hydrogen flow heat transfer and catalytic conversion test platform using low-temperature helium as cold source | |
| CN116202300B (en) | Small low-temperature liquefying device, low-temperature liquid flowmeter calibrating device and calibrating method | |
| CN115854651B (en) | Hydrogen liquefaction method and device for precooling by utilizing refrigerator |
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 |