CN111174088A - Temperature drop control system and method for deflation process of high-pressure gas cylinder - Google Patents
Temperature drop control system and method for deflation process of high-pressure gas cylinder Download PDFInfo
- Publication number
- CN111174088A CN111174088A CN201910039083.8A CN201910039083A CN111174088A CN 111174088 A CN111174088 A CN 111174088A CN 201910039083 A CN201910039083 A CN 201910039083A CN 111174088 A CN111174088 A CN 111174088A
- Authority
- CN
- China
- Prior art keywords
- gas
- gas cylinder
- cylinder
- deflation
- temperature
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 96
- 238000007599 discharging Methods 0.000 claims abstract description 96
- 238000005265 energy consumption Methods 0.000 abstract description 8
- 239000007789 gas Substances 0.000 description 432
- 229910052739 hydrogen Inorganic materials 0.000 description 20
- 239000001257 hydrogen Substances 0.000 description 20
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 18
- 230000000740 bleeding effect Effects 0.000 description 11
- 230000000694 effects Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 239000002918 waste heat Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004017 vitrification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
- F17C13/026—Special adaptations of indicating, measuring, or monitoring equipment having the temperature as the parameter
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/07—Actions triggered by measured parameters
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a temperature drop control system and method for a deflation process of a high-pressure gas cylinder. The system comprises: the device comprises a gas cylinder charging and discharging device, a multi-channel connecting device and a controller; the gas cylinder gas charging and discharging device is communicated with the main gas discharging pipeline through a multi-channel connecting device; the controller is connected with the gas cylinder gas charging and discharging device and is used for controlling the gas temperature of the gas cylinder gas charging and discharging device to be greater than the lower limit value of the preset temperature in the gas discharging process; the gas cylinder charging and discharging device comprises N gas cylinder units; each gas cylinder unit is communicated with the adjacent gas cylinder unit through a bypass pipeline; each gas cylinder unit is communicated with a main gas discharge pipeline through a multi-channel connecting device; n is greater than or equal to 2. The invention can realize the temperature drop control of the deflation process of the high-pressure gas cylinder with safety, high efficiency and zero energy consumption.
Description
Technical Field
The invention relates to the technical field of new energy, in particular to a temperature drop control system and method for a deflation process of a high-pressure gas cylinder.
Background
The hydrogen energy has the advantages of cleanness, renewability, wide source, high energy conversion efficiency of the hydrogen fuel cell and the like, and has important significance for solving two worldwide problems of energy shortage and environmental pollution. In recent years, with the rapid development of hydrogen energy, hydrogen fuel cell vehicles have attracted high attention from countries in the world due to their advantages of environmental friendliness, rapid refueling, high energy conversion efficiency, and the like. In order to achieve the commercially required driving range of 500km, it is a trend to use 70MPa vehicle-mounted high-pressure hydrogen storage. Currently, a fiber fully-wound high-pressure hydrogen storage cylinder consisting of an aluminum alloy/plastic lining and a carbon fiber composite material reinforcing layer is a core component for realizing vehicle-mounted high-pressure hydrogen storage; meanwhile, the gas cylinder is also applied to a 70MPa hydrogenation station and a high-pressure long-tube trailer. However, due to the characteristics of high hydrogen storage pressure and low thermal conductivity of the composite material layer of the high-pressure hydrogen storage cylinder fully wound by fibers, the high-pressure hydrogen storage cylinder undergoes significant expansion and temperature reduction when hydrogen is supplied to the outside. And once the temperature is lower than the lower limit of the safety temperature of minus 40 ℃ of the high-pressure hydrogen storage cylinder with fully wound fibers, the failure of the sealing element of the cylinder opening of the cylinder and the vitrification of the plastic lining material are likely to be caused, and the safety accidents such as hydrogen leakage and the like are caused. In order to ensure the safe use of the high-pressure hydrogen storage cylinder, an effective temperature drop control method is urgently needed to be developed aiming at the hydrogen discharge process of the high-pressure hydrogen storage cylinder.
At present, in order to inhibit the temperature drop generated in the hydrogen discharge process of the high-pressure hydrogen storage cylinder, researchers mainly provide the following temperature drop control modes: 1) joule heat generated by electrification or electromagnetic induction is used for heating the gas cylinder material, and the method has the problems of potential safety hazard of contact between hydrogen and current and extra energy consumption; 2) the method is restricted by the size of the mouth of the high-pressure hydrogen storage cylinder which is completely wound by fibers, and is difficult to arrange enough heat exchange area; 3) the method is also restricted by the size of the opening of the cylinder, and is difficult to arrange enough heat exchange area, so that the heat generated by throttling and temperature rising cannot be effectively utilized. In conclusion, the safety and effectiveness of the temperature drop control mode in the air discharging process of the existing high-pressure air bottle need to be improved.
Disclosure of Invention
In view of the foregoing, there is a need for a safe, efficient, zero-cost system and method for controlling the temperature drop during deflation of a high pressure gas cylinder.
In order to achieve the purpose, the invention provides the following scheme:
a high pressure gas cylinder deflation process temperature drop control system, the system comprising: the device comprises a gas cylinder charging and discharging device, a multi-channel connecting device and a controller; the gas cylinder gas charging and discharging device is communicated with the main gas discharging pipeline through the multi-channel connecting device; the controller is connected with the gas cylinder gas charging and discharging device and is used for controlling the gas temperature of the gas cylinder gas charging and discharging device to be larger than the lower limit value of the preset temperature in the gas discharging process;
the gas cylinder charging and discharging device comprises N gas cylinder units; each gas cylinder unit is communicated with the adjacent gas cylinder unit through a bypass pipeline; each gas cylinder unit is communicated with the main gas discharge pipeline through the multi-channel connecting device; n is greater than or equal to 2.
Optionally, the gas cylinder unit comprises a gas cylinder, a cylinder port valve, a charging and discharging branch pipe, a stop valve and a temperature sensor;
compressed gas is stored in the gas storage cylinder, and the bottle mouth of the gas storage cylinder is sealed by the bottle mouth valve; one end of the inflation and deflation branch pipe is communicated with the gas storage cylinder through the bottleneck valve, and the other end of the inflation and deflation branch pipe is communicated with the multi-channel connecting device; the stop valve is arranged on the inflation and deflation branch pipe; the temperature sensor is inserted into the gas storage cylinder through the bottleneck valve.
Optionally, a pipeline heater is arranged on the bypass pipeline.
Optionally, a heat exchanger is arranged on the bypass pipeline.
Optionally, the multi-channel connecting device is a multi-channel joint;
the charging and discharging branch pipes in each gas bottle unit are communicated with the main gas discharging pipeline through the multi-way joint; and the charging and discharging branch pipes in each gas bottle unit are also communicated with the main charging pipeline through the multi-way joint.
Optionally, the multi-way connecting device includes a first multi-way joint and a second multi-way joint;
the charging and discharging branch pipes in each gas cylinder unit are communicated with the second multi-way joint through the first multi-way joint; the second multi-way joint is respectively communicated with the main gas discharge pipeline and the main gas charging pipeline.
Optionally, a total deflation stop valve is arranged on the total deflation pipeline.
Optionally, a total inflation stop valve is arranged on the total inflation pipeline.
The invention also provides a temperature reduction control method in the deflation process of the high-pressure gas cylinder, which is used for the temperature reduction control system in the deflation process of the high-pressure gas cylinder, wherein gas cylinder units at two ends of a gas cylinder deflation and inflation device in the system are respectively a No. 1 gas cylinder unit and an No. N gas cylinder unit, and the method comprises the following steps:
step S1: controlling the total deflation stop valve to open;
step S2: controlling the stop valve corresponding to the Nth gas cylinder unit to open so that gas in the gas cylinders in the Nth gas cylinder unit sequentially flows out through the stop valve corresponding to the Nth gas cylinder unit and the total deflation stop valve, enabling the gas in the gas cylinders in the ith gas cylinder unit to flow into the gas cylinders in the (i + 1) th gas cylinder unit along a bypass pipeline, and detecting the temperature of the gas in the gas cylinders in all the gas cylinder units in real time; wherein i is more than or equal to 1 and less than or equal to N-1;
step S3: when the gas temperature in the gas storage cylinders in all the gas cylinder units is greater than a preset temperature lower limit value and the gas temperature in the gas storage cylinder in the 1 st gas cylinder unit is less than or equal to a preset deflation switching temperature, closing a stop valve corresponding to the Nth gas cylinder unit, opening a stop valve corresponding to the 1 st gas cylinder unit, enabling the gas in the gas storage cylinder in the 1 st gas cylinder unit to sequentially flow out through the stop valve corresponding to the 1 st gas cylinder unit and a total deflation stop valve, enabling the gas in the gas storage cylinder in the (i + 1) th gas cylinder unit to flow into the gas storage cylinder in the ith gas cylinder unit along a bypass pipeline, and detecting the gas temperature in the gas storage cylinders in all the gas cylinder units in real time;
step S4: and returning to the step S2 when the gas temperature in the gas storage cylinders in all the gas cylinder units is higher than the preset lower temperature limit value and the gas temperature in the gas storage cylinder in the Nth gas cylinder unit is lower than or equal to the preset deflation switching temperature.
Step S5: and when the temperature of the gas in the gas storage cylinder in any one gas cylinder unit is less than or equal to the lower limit value of the preset temperature, controlling the stop valves corresponding to all the gas cylinder units and the total gas release stop valve to be closed, and stopping gas release.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a temperature drop control system and method for a deflation process of a high-pressure gas cylinder. The system comprises: the device comprises a gas cylinder charging and discharging device, a multi-channel connecting device and a controller; the gas cylinder gas charging and discharging device is communicated with the main gas discharging pipeline through a multi-channel connecting device; the controller is connected with the gas cylinder gas charging and discharging device and is used for controlling the gas temperature of the gas cylinder gas charging and discharging device to be greater than the lower limit value of the preset temperature in the gas discharging process; the gas cylinder charging and discharging device comprises N gas cylinder units; the N gas cylinder units are connected in series through bypass pipelines, and each gas cylinder unit is communicated with an adjacent gas cylinder unit; each gas cylinder unit is communicated with a main gas discharge pipeline through a multi-channel connecting device; n is greater than or equal to 2. The invention can realize the temperature drop control of the deflation process of the high-pressure gas cylinder with safety, high efficiency and zero energy consumption.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a schematic structural view of a temperature drop control system in a deflation process of a high-pressure gas cylinder in embodiment 1 of the invention;
FIG. 2 is a schematic structural view of a temperature drop control system in the deflation process of the high-pressure gas cylinder in embodiment 2 of the invention;
FIG. 3 is a schematic structural view of a temperature drop control system in the deflation process of the high-pressure gas cylinder in embodiment 3 of the invention;
fig. 4 is a schematic structural diagram of a temperature drop control system in the deflation process of the high-pressure gas cylinder in embodiment 4 of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The embodiment provides a temperature drop control system for a deflation process of a high-pressure gas cylinder, which comprises: the device comprises a gas cylinder charging and discharging device, a multi-channel connecting device and a controller; the gas cylinder gas charging and discharging device is communicated with the main gas discharging pipeline through the multi-channel connecting device; the controller is connected with the gas cylinder gas charging and discharging device and is used for controlling the gas temperature of the gas cylinder gas charging and discharging device to be larger than the lower limit value of the preset temperature in the gas discharging process so as to ensure the safe use of the gas cylinder; the gas cylinder charging and discharging device comprises N gas cylinder units; the N gas cylinder units are connected in series through bypass pipelines, and each gas cylinder unit is communicated with an adjacent gas cylinder unit; each gas cylinder unit is communicated with the main gas discharge pipeline through the multi-channel connecting device; n is greater than or equal to 2.
The gas cylinder unit comprises a gas storage cylinder, a cylinder port valve, a charging and discharging branch pipe, a stop valve and a temperature sensor; compressed gas is stored in the gas storage cylinder, and the bottle mouth of the gas storage cylinder is sealed by the bottle mouth valve; one end of the inflation and deflation branch pipe is communicated with the gas storage cylinder through the bottleneck valve, and the other end of the inflation and deflation branch pipe is communicated with the multi-channel connecting device; the stop valve is arranged on the inflation and deflation branch pipe; the temperature sensor is inserted into the gas storage cylinder through the bottleneck valve.
As an alternative embodiment, an in-line heater is disposed on the bypass line.
As an alternative embodiment, a heat exchanger is arranged on the bypass pipeline.
As an alternative embodiment, the multi-way connection device is a multi-way joint; the charging and discharging branch pipes in each gas bottle unit are communicated with the main gas discharging pipeline through the multi-way joint; and the charging and discharging branch pipes in each gas bottle unit are also communicated with the main charging pipeline through the multi-way joint. The main deflation pipeline is provided with a main deflation stop valve, and the main inflation pipeline is provided with a main inflation stop valve.
As an alternative embodiment, the multichannel connection device comprises a first multichannel connector and a second multichannel connector; the charging and discharging branch pipes in each gas cylinder unit are communicated with the second multi-way joint through the first multi-way joint; the second multi-way joint is respectively communicated with the main gas discharge pipeline and the main gas charging pipeline.
As an alternative embodiment, a mass flow meter may also be provided on the total bleed line (downstream) for detecting the flow value.
Four specific examples are provided below.
Example 1:
fig. 1 is a schematic structural view of a temperature drop control system in a deflation process of a high-pressure gas cylinder in embodiment 1 of the present invention. Referring to fig. 1, the temperature drop control system for the deflation process of the high-pressure gas cylinder in the embodiment comprises: the device comprises a gas cylinder charging and discharging device, a multi-channel connecting device and a controller; the gas cylinder gas charging and discharging device is communicated with the main gas discharging pipeline through the multi-channel connecting device; the controller is connected with the gas cylinder gas charging and discharging device and used for controlling the gas temperature of the gas cylinder gas charging and discharging device to be larger than the preset temperature lower limit value in the gas discharging process so as to ensure the safe use of the gas cylinder.
The gas cylinder charging and discharging device comprises 2 gas cylinder units; the first gas cylinder unit is communicated with the second gas cylinder unit through a bypass pipeline 5; the first gas cylinder unit and the second gas cylinder unit are communicated with the main gas discharge pipeline 7 through the multi-way connecting device.
The first gas cylinder unit comprises a gas cylinder 1a, a bottleneck valve 2a, a charging and discharging branch pipe 3a, a stop valve 4a and a temperature sensor inserted into the gas cylinder 1a through the bottleneck valve 2 a; the second gas cylinder unit comprises a gas cylinder 1b, a bottle opening valve 2b, a charging and discharging branch pipe 3b, a stop valve 4b and a temperature sensor inserted into the gas cylinder 1b through the bottle opening valve 2 b; the bottle mouth valve is used for connecting the gas storage bottle with the gas charging and discharging branch pipe and the bypass pipeline; the multi-channel connecting device is a four-way joint 6; the charging and discharging branch pipes 3a and 3b of the first gas cylinder unit and the second gas cylinder unit are communicated with the main gas discharging pipeline 7 through the four-way joint 6; the inflation and deflation branch pipes 3a and 3b are also communicated with the main inflation pipeline 9 through the four-way joint 6; a total deflation stop valve 8 is arranged on the total deflation pipeline 7; and a main inflation stop valve 10 is arranged on the main inflation pipeline 9. The bypass pipeline 5 can enable the gas storage cylinder to be simultaneously deflated and accompanied with gas inflow, so that jet mixing effect is generated, and heat transfer enhancement is realized.
The gas cylinder charging and discharging device in the embodiment always keeps the total charging stop valve 10 in a closed state in the discharging process. The temperature drop control in the air bleeding process mainly comprises the following steps:
(1) when the air release is started, the stop valve 4b and the total air release stop valve 8 are opened, the stop valve 4a is in a closed state, so that compressed air flows into the air storage bottle 1b from the air storage bottle 1a through the bypass pipeline 5, and then flows into the total air release pipeline 7 from the air storage bottle 1b through the air release branch pipe 3b, the stop valve 4b and the four-way joint 6 in sequence for air release. In the process, only gas flows out of the gas storage cylinder 1a, no gas flows in, and heat transfer enhancement is not obtained; the gas cylinder 1b generates jet mixing in the gas cylinder 1b along with the inflow of the gas while the gas flows out, so that the convection heat transfer coefficient of the inner wall surface of the gas cylinder 1b is greatly improved, and the temperature drop caused by the deflation in the gas cylinder 1b is effectively inhibited.
(2) For the gas cylinder 1a which has not been heat transfer enhanced, the temperature drop is significantly higher than that of the gas cylinder 1b because it has not been heat transfer enhanced. When the temperature of the air conditioner is reduced to the preset air bleeding switching temperature T of the systemswAt this time, the cut-off valve 4a is opened, and the cut-off valve 4b is closed. Compressed gas flows into the gas storage cylinder 1a from the gas storage cylinder 1b through the bypass pipeline 5, then flows into the main gas discharge pipeline 7 from the gas storage cylinder 1a through the gas charging and discharging branch pipe 3a, the stop valve 4a and the four-way joint 6 in sequence for gas discharge, and the flow direction is opposite to the original flow direction. At this time, only gas flows out of the gas storage cylinder 1b, no gas flows in, and heat transfer enhancement is not obtained; the gas cylinder 1a generates jet mixing in the gas cylinder 1a along with the inflow of the gas while the gas flows out, so that the convection heat transfer coefficient of the inner wall surface of the gas cylinder 1a is greatly improved, and the temperature drop generated by the deflation in the gas cylinder 1a is effectively inhibited.
(3) Whether the temperature inside the gas storage bottle 1a and the gas storage bottle 1b is less than or equal to the deflation switching temperature T preset by the system or not is judged by the controllerswAnd the processes (1) and (2) are switched continuously, so that the gas storage cylinders 1a and 1b can be ensured to be enhanced in heat transfer in the gas discharging process of the gas cylinder gas charging and discharging device, and the temperature drop caused by gas expansion in the gas discharging process is effectively inhibited.
Example 2:
fig. 2 is a schematic structural diagram of a temperature drop control system in the deflation process of the high-pressure gas cylinder in embodiment 2 of the invention. Referring to fig. 2, the temperature drop control system for the deflation process of the high-pressure gas cylinder in the embodiment comprises: the device comprises a gas cylinder charging and discharging device, a multi-channel connecting device and a controller; the gas cylinder gas charging and discharging device is communicated with the main gas discharging pipeline through the multi-channel connecting device; the controller is connected with the gas cylinder gas charging and discharging device and used for controlling the gas temperature of the gas cylinder gas charging and discharging device to be larger than the preset temperature lower limit value in the gas discharging process so as to ensure the safe use of the gas cylinder.
The gas cylinder charging and discharging device comprises 3 gas cylinder units; the first gas cylinder unit is communicated with the second gas cylinder unit through a bypass pipeline 5; the second gas cylinder unit is communicated with the third gas cylinder unit through a bypass pipeline 5 b; the first gas cylinder unit, the second gas cylinder unit and the third gas cylinder unit are all communicated with the main gas discharge pipeline 7 through the multi-channel connecting device.
The first gas cylinder unit comprises a gas cylinder 1a, a bottleneck valve 2a, a charging and discharging branch pipe 3a, a stop valve 4a and a temperature sensor inserted into the gas cylinder 1a through the bottleneck valve 2 a; the second gas cylinder unit comprises a gas cylinder 1b, a bottle opening valve 2b, a charging and discharging branch pipe 3b, a stop valve 4b and a temperature sensor inserted into the gas cylinder 1b through the bottle opening valve 2 b; the third gas cylinder unit comprises a gas cylinder 1c, a bottle opening valve 2c, a charging and discharging branch pipe 3c, a stop valve 4c and a temperature sensor inserted into the gas cylinder 1c through the bottle opening valve 2 c; the bottle mouth valve is used for connecting the gas storage bottle with the gas charging and discharging branch pipe and the bypass pipeline; the multi-way connecting device comprises a first multi-way joint and a second multi-way joint; the first multi-way joint is a four-way joint 6, the second multi-way joint is a three-way joint 12, and the charging and discharging branch pipes 3a, 3b and 3c of the first air bottle unit, the second air bottle unit and the second air bottle unit are communicated with the second multi-way joint through the first multi-way joint; the second multi-way joint is respectively communicated with the main gas discharge pipeline 7 and the main gas charging pipeline 9; a total deflation stop valve 8 is arranged on the total deflation pipeline 7; and a main inflation stop valve 10 is arranged on the main inflation pipeline 9. The bypass pipelines 5 and 5b can enable the gas storage cylinder to be simultaneously deflated and gas to flow in, so that jet mixing effect is generated, and heat transfer enhancement is realized.
The gas cylinder charging and discharging device in the embodiment always keeps the stop valve 4b and the total charging stop valve 10 in a closed state during the discharging process. The temperature drop control in the air bleeding process mainly comprises the following steps:
(1) when the air release is started, the stop valve 4c and the total air release automatic stop valve 8 are opened, the stop valve 4a is in a closed state, so that compressed air flows into the air storage bottle 1b from the air storage bottle 1a through the bypass pipeline 5, flows into the air storage bottle 1c from the air storage bottle 1b through the bypass pipeline 5b, and finally flows into the total air release pipeline 7 for air release from the air storage bottle 1c through the air release branch pipe 3c, the air release stop valve 4c and the four-way joint 6 in sequence. In the process, only gas flows out of the gas storage cylinder 1a, no gas flows in, and heat transfer enhancement is not obtained; and gas cylinder 1b and gas cylinder 1c are along with gaseous inflow when gaseous outflow, and the gas that flows into in the bottle produces the efflux mixing in gas cylinder 1b and gas cylinder 1c are inside to improve the convection heat transfer coefficient of gas cylinder 1b and gas cylinder 1c internal face greatly, effectively restrained gas cylinder 1b and gas cylinder 1c inside because the temperature drop that the gassing produced.
(2) For the gas cylinder 1a which has not been heat transfer enhanced, the temperature drop is significantly higher than for the gas cylinders 1b and 1c because it has not been heat transfer enhanced. When the temperature of the air conditioner is reduced to the preset air bleeding switching temperature T of the systemswAt this time, the cut-off valve 4a is opened, and the cut-off valve 4c is closed. Compressed gas flows into the gas storage bottle 1b from the gas storage bottle 1c through the bypass pipeline 5b, then flows into the gas storage bottle 1a from the gas storage bottle 1b through the bypass pipeline 5, finally flows into the main gas discharge pipeline 7 from the gas storage bottle 1a through the gas discharge branch pipe 3a, the stop valve 4a and the four-way joint 6 in sequence for gas discharge, and the flow direction is opposite to the original flow direction. At this time, only gas flows out of the gas storage cylinder 1c, no gas flows in, and heat transfer enhancement is not obtained; the gas flowing into the gas storage bottles 1a and 1b generates jet mixing in the gas storage bottles 1a and 1b along with the flowing of the gas when the gas flows out, so that the convection heat transfer coefficient of the inner wall surfaces of the gas storage bottles 1a and 1b is greatly improved, and the temperature drop generated by gas release in the gas storage bottles 1a and 1b is effectively inhibited.
(3) Whether the temperature inside the gas storage bottle 1a and the gas storage bottle 1c is lower than the preset deflation switching temperature T or not is judged by the controllerswAnd the processes (1) and (2) are switched continuously, so that the gas storage cylinders 1a, 1b and 1c can be ensured to be enhanced in heat transfer in the gas releasing process of the gas storage cylinder group, and the temperature drop caused by gas expansion in the gas releasing process is effectively inhibited.
Example 3:
fig. 3 is a schematic structural diagram of a temperature drop control system in the deflation process of the high-pressure gas cylinder in embodiment 3 of the invention. Referring to fig. 3, the present embodiment is different from embodiment 1 in that a line heater 13 is provided on the bypass line 5, and the line heater 13 is used to heat the compressed gas flowing through the bypass line 5.
The gas cylinder charging and discharging device in the embodiment always keeps the total charging stop valve 10 in a closed state in the discharging process. The line heater 13 heats the gas flowing through the bypass line 5 at all times during the air bleeding process. The temperature drop control in the air bleeding process mainly comprises the following steps:
(1) when the air release is started, the stop valve 4b and the stop valve 8 are opened at first, the stop valve 4a is in a closed state, namely, compressed air flows into the air storage bottle 1b from the air storage bottle 1a through the bypass pipeline 5 and the pipeline heater 13, and then flows into the main air release pipeline 7 for air release from the air storage bottle 1b through the air release branch pipe 3b, the stop valve 4b and the four-way joint 6 in sequence. In the process, only gas flows out of the gas storage cylinder 1a, no gas flows in, and heat transfer enhancement is not obtained; the gas cylinder 1b flows in the compressed gas heated by the pipeline heater 13 while the gas flows out, namely, the specific enthalpy of the gas flowing into the gas cylinder 1b is greatly increased, so that the temperature drop of the gas cylinder 1b during gas discharge is further inhibited on the basis of the jet mixing effect.
(2) For the gas cylinder 1a which has not been heat transfer enhanced, the temperature drop is significantly higher than that of the gas cylinder 1b because it has not been heat transfer enhanced. When the temperature of the air conditioner is reduced to the preset air bleeding switching temperature T of the systemswAt this time, the cut-off valve 4a is opened, and the cut-off valve 4b is closed. Compressed gas flows into the gas storage cylinder 1a from the gas storage cylinder 1b sequentially through the bypass pipeline 5 and the pipeline heater 13, and then flows into the main gas discharging pipeline 7 from the gas storage cylinder 1a sequentially through the gas discharging branch pipe 3a, the stop valve 4a and the four-way joint 6 for gas discharging. In the process, only gas flows out of the gas storage cylinder 1b, no gas flows in, and heat transfer enhancement is not obtained; and the gas bomb 1a then flowed in the compressed gas who has been heated by pipeline heater 13 when gas flows out, and the gas specific enthalpy that flows in gas bomb 1a greatly increased promptly, the restriction of gas cylinder opening size and heat transfer area that received when having avoided the inside direct heating of gas cylinder to the temperature drop of gas bomb 1a when gassing has further been restrained on the basis of efflux mixing effect.
(3) Judging whether the temperature inside the gas storage bottle 1a and the gas storage bottle 1b is lower than a preset deflation switching temperature T or not through a controllerswContinuously switching between the processes (1) and (2) to ensure that the gas storage cylinders 1a and 1b can be enhanced in heat transfer in the gas discharging process of the gas storage cylinder group, therebyEffectively inhibit the temperature drop generated by gas expansion in the air release process.
Example 4:
fig. 4 is a schematic structural diagram of a temperature drop control system in the deflation process of the high-pressure gas cylinder in embodiment 4 of the invention. Referring to fig. 4, the present embodiment is different from embodiment 3 in that a heat exchanger 14 is provided on the bypass line 5, and the compressed gas flowing through the bypass line 5 is heated by the heat exchanger 14. Compared with embodiment 3, the advantage is that the heat exchanger 14 can conveniently utilize waste heat generated in various processes or other processes to realize temperature drop control of the air bleeding process without additional energy consumption.
The gas cylinder charging and discharging device in the embodiment always keeps the total charging stop valve 10 in a closed state in the discharging process. In this example, the bypass gas is heated by flowing through the tube side of the heat exchanger 14 during the bleed. The temperature drop control in the air bleeding process mainly comprises the following steps:
(1) when the gas storage cylinder group is deflated, the stop valve 4b and the stop valve 8 are firstly opened, the stop valve 4a is in a closed state, namely, compressed gas flows into the gas storage cylinder 1b from the gas storage cylinder 1a through the bypass pipeline 5 and the heat exchanger 14, and then flows into the main deflation pipeline 7 for deflation from the gas storage cylinder 1b through the inflation and deflation branch pipe 3b, the stop valve 4b and the four-way joint 6 in sequence. In the process, only gas flows out of the gas storage cylinder 1a, no gas flows in, and heat transfer enhancement is not obtained; the gas cylinder 1b flows in the compressed gas heated by the heat exchanger 14 while the gas flows out, namely, the specific enthalpy of the gas flowing into the gas cylinder 1b is greatly increased, so that the temperature drop of the gas cylinder 1b during gas discharge is further inhibited on the basis of jet mixing effect.
(2) For the gas cylinder 1a which has not been heat transfer enhanced, the temperature drop is significantly higher than that of the gas cylinder 1b because it has not been heat transfer enhanced. When the temperature of the air conditioner is reduced to the preset air bleeding switching temperature T of the systemswAt this time, the cut-off valve 4a is opened, and the cut-off valve 4b is closed. Compressed gas flows into the gas storage cylinder 1a from the gas storage cylinder 1b through the bypass pipeline 5 and the heat exchanger 14, and then flows into the main gas discharging pipeline 7 from the gas storage cylinder 1a through the gas charging and discharging branch pipe 3a, the stop valve 4a and the four-way joint 6 in sequence for gas discharging. In the process, the gas cylinder 1b only has gas flowNo gas flows in and heat transfer is not enhanced; and the gas bomb 1a has flowed into the compressed gas who has heated through heat exchanger 14 when gas outflow, and the gas specific enthalpy that flows into in gas bomb 1a greatly increased promptly, has avoided the restriction of gas cylinder opening size and heat transfer area that receives when the inside direct heating of gas cylinder to the temperature drop of gas bomb 1a when gassing has further been restrained on the basis of efflux mixing effect.
(3) Whether the temperature inside the gas storage bottle 1a and the gas storage bottle 1b is lower than the deflation switching temperature T preset by the system or not is judged by the controllerswAnd the processes (1) and (2) are switched continuously, so that the gas storage cylinders 1a and 1b can be ensured to be enhanced in heat transfer in the gas discharging process of the gas storage cylinder group, and the temperature drop caused by gas expansion in the gas discharging process is effectively inhibited.
(4) Furthermore, in the above steps (1) - (3), the shell side of the heat exchanger 14 can adopt media carrying various waste heat, such as hot water carrying waste heat of the process (for example, cooling water of a fuel cell carrying waste heat of the fuel cell), hot air, etc., so that extra energy consumption is not needed, and the temperature drop control of the air bleeding process with zero energy consumption is realized.
The temperature drop control system for the deflation process of the high-pressure gas cylinder can realize safe, efficient and zero-energy-consumption temperature drop control of the deflation process of the high-pressure gas cylinder.
The invention also provides a temperature reduction control method in the deflation process of the high-pressure gas cylinder, which is used for the temperature reduction control system in the deflation process of the high-pressure gas cylinder, wherein gas cylinder units at two ends of a gas cylinder deflation and inflation device in the system are respectively a No. 1 gas cylinder unit and an No. N gas cylinder unit, and the method comprises the following steps:
step S1: controlling the total deflation stop valve to open;
step S2: controlling the stop valve corresponding to the Nth gas cylinder unit to open so that gas in the gas cylinders in the Nth gas cylinder unit sequentially flows out through the stop valve corresponding to the Nth gas cylinder unit and the total deflation stop valve, enabling the gas in the gas cylinders in the ith gas cylinder unit to flow into the gas cylinders in the (i + 1) th gas cylinder unit along a bypass pipeline, and detecting the temperature of the gas in the gas cylinders in all the gas cylinder units in real time; wherein i is more than or equal to 1 and less than or equal to N-1;
step S3: when the gas temperature in the gas storage cylinders in all the gas cylinder units is greater than a preset temperature lower limit value and the gas temperature in the gas storage cylinder in the 1 st gas cylinder unit is less than or equal to a preset deflation switching temperature, closing a stop valve corresponding to the Nth gas cylinder unit, opening a stop valve corresponding to the 1 st gas cylinder unit, enabling the gas in the gas storage cylinder in the 1 st gas cylinder unit to sequentially flow out through the stop valve corresponding to the 1 st gas cylinder unit and a total deflation stop valve, enabling the gas in the gas storage cylinder in the (i + 1) th gas cylinder unit to flow into the gas storage cylinder in the ith gas cylinder unit along a bypass pipeline, and detecting the gas temperature in the gas storage cylinders in all the gas cylinder units in real time;
step S4: and returning to the step S2 when the gas temperature in the gas storage cylinders in all the gas cylinder units is higher than the preset lower temperature limit value and the gas temperature in the gas storage cylinder in the Nth gas cylinder unit is lower than or equal to the preset deflation switching temperature.
Step S5: and when the temperature of the gas in the gas storage cylinder in any one gas cylinder unit is less than or equal to the lower limit value of the preset temperature, controlling the stop valves corresponding to all the gas cylinder units and the total gas release stop valve to be closed, and stopping gas release.
As an alternative embodiment, when the reading of the mass flow meter is zero, the corresponding stop valves of all the gas cylinder units and the total deflation stop valve are controlled to be closed, and the deflation is stopped.
The temperature drop control method for the deflation process of the high-pressure gas cylinder can realize safe, efficient and zero-energy-consumption temperature drop control of the deflation process of the high-pressure gas cylinder.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (9)
1. A high pressure gas cylinder deflation process temperature drop control system, the system comprising: the device comprises a gas cylinder charging and discharging device, a multi-channel connecting device and a controller; the gas cylinder gas charging and discharging device is communicated with the main gas discharging pipeline through the multi-channel connecting device; the controller is connected with the gas cylinder gas charging and discharging device and is used for controlling the gas temperature of the gas cylinder gas charging and discharging device to be larger than the lower limit value of the preset temperature in the gas discharging process;
the gas cylinder charging and discharging device comprises N gas cylinder units; each gas cylinder unit is communicated with the adjacent gas cylinder unit through a bypass pipeline; each gas cylinder unit is communicated with the main gas discharge pipeline through the multi-channel connecting device; n is greater than or equal to 2.
2. The system for controlling temperature drop in the deflation process of the high-pressure gas cylinder according to claim 1, wherein the gas cylinder unit comprises a gas cylinder, a cylinder port valve, a charging and discharging branch pipe, a stop valve and a temperature sensor;
compressed gas is stored in the gas storage cylinder, and the bottle mouth of the gas storage cylinder is sealed by the bottle mouth valve; one end of the inflation and deflation branch pipe is communicated with the gas storage cylinder through the bottleneck valve, and the other end of the inflation and deflation branch pipe is communicated with the multi-channel connecting device; the stop valve is arranged on the inflation and deflation branch pipe; the temperature sensor is inserted into the gas storage cylinder through the bottleneck valve.
3. The system for controlling temperature drop in the deflation process of a high pressure gas cylinder according to claim 1, wherein a line heater is arranged on the bypass line.
4. The system for controlling temperature drop in the deflation process of a high pressure gas cylinder according to claim 1, wherein a heat exchanger is arranged on the bypass line.
5. The system for controlling temperature drop in the deflation process of the high-pressure gas cylinder according to claim 2, wherein the multi-way connection device is a multi-way joint;
the charging and discharging branch pipes in each gas bottle unit are communicated with the main gas discharging pipeline through the multi-way joint; and the charging and discharging branch pipes in each gas bottle unit are also communicated with the main charging pipeline through the multi-way joint.
6. The system of claim 2, wherein the multi-way connection means comprises a first multi-way connector and a second multi-way connector;
the charging and discharging branch pipes in each gas cylinder unit are communicated with the second multi-way joint through the first multi-way joint; the second multi-way joint is respectively communicated with the main gas discharge pipeline and the main gas charging pipeline.
7. The system for controlling temperature drop in the deflation process of the high-pressure gas cylinder according to claim 5 or 6, wherein a total deflation cut valve is arranged on the total deflation pipeline.
8. The system for controlling temperature drop in the deflation process of the high-pressure gas cylinder according to claim 7, wherein a total inflation stop valve is arranged on the total inflation pipeline.
9. A high-pressure gas cylinder deflation process temperature drop control method, which is used for the high-pressure gas cylinder deflation process temperature drop control system according to claim 8, wherein the gas cylinder units at two ends of the gas cylinder deflation and inflation device in the system are respectively the 1 st gas cylinder unit and the Nth gas cylinder unit, and the method comprises the following steps:
step S1: controlling the total deflation stop valve to open;
step S2: controlling the stop valve corresponding to the Nth gas cylinder unit to open so that gas in the gas cylinders in the Nth gas cylinder unit sequentially flows out through the stop valve corresponding to the Nth gas cylinder unit and the total deflation stop valve, enabling the gas in the gas cylinders in the ith gas cylinder unit to flow into the gas cylinders in the (i + 1) th gas cylinder unit along a bypass pipeline, and detecting the temperature of the gas in the gas cylinders in all the gas cylinder units in real time; wherein i is more than or equal to 1 and less than or equal to N-1;
step S3: when the gas temperature in the gas storage cylinders in all the gas cylinder units is greater than a preset temperature lower limit value and the gas temperature in the gas storage cylinder in the 1 st gas cylinder unit is less than or equal to a preset deflation switching temperature, closing a stop valve corresponding to the Nth gas cylinder unit, opening a stop valve corresponding to the 1 st gas cylinder unit, enabling the gas in the gas storage cylinder in the 1 st gas cylinder unit to sequentially flow out through the stop valve corresponding to the 1 st gas cylinder unit and a total deflation stop valve, enabling the gas in the gas storage cylinder in the (i + 1) th gas cylinder unit to flow into the gas storage cylinder in the ith gas cylinder unit along a bypass pipeline, and detecting the gas temperature in the gas storage cylinders in all the gas cylinder units in real time;
step S4: and returning to the step S2 when the gas temperature in the gas storage cylinders in all the gas cylinder units is higher than the preset lower temperature limit value and the gas temperature in the gas storage cylinder in the Nth gas cylinder unit is lower than or equal to the preset deflation switching temperature.
Step S5: and when the temperature of the gas in the gas storage cylinder in any one gas cylinder unit is less than or equal to the lower limit value of the preset temperature, controlling the stop valves corresponding to all the gas cylinder units and the total gas release stop valve to be closed, and stopping gas release.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910039083.8A CN111174088B (en) | 2019-01-16 | 2019-01-16 | Temperature drop control system and method for deflation process of high-pressure gas cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910039083.8A CN111174088B (en) | 2019-01-16 | 2019-01-16 | Temperature drop control system and method for deflation process of high-pressure gas cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111174088A true CN111174088A (en) | 2020-05-19 |
| CN111174088B CN111174088B (en) | 2021-04-20 |
Family
ID=70655349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910039083.8A Active CN111174088B (en) | 2019-01-16 | 2019-01-16 | Temperature drop control system and method for deflation process of high-pressure gas cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111174088B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001295996A (en) * | 2000-04-14 | 2001-10-26 | Toyota Motor Corp | Hydrogen storage and supply device |
| JP2004084808A (en) * | 2002-08-27 | 2004-03-18 | Nissan Motor Co Ltd | Hydrogen gas supply system for vehicle |
| CN1826492A (en) * | 2003-07-25 | 2006-08-30 | 丰田自动车株式会社 | Gas supply system |
| CN101258103A (en) * | 2005-09-07 | 2008-09-03 | 丰田自动车株式会社 | Hydrogen supply apparatus and fuel gas supply apparatus |
| CN103181013A (en) * | 2010-10-28 | 2013-06-26 | 丰田自动车株式会社 | Fuel supply system |
-
2019
- 2019-01-16 CN CN201910039083.8A patent/CN111174088B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001295996A (en) * | 2000-04-14 | 2001-10-26 | Toyota Motor Corp | Hydrogen storage and supply device |
| JP2004084808A (en) * | 2002-08-27 | 2004-03-18 | Nissan Motor Co Ltd | Hydrogen gas supply system for vehicle |
| CN1826492A (en) * | 2003-07-25 | 2006-08-30 | 丰田自动车株式会社 | Gas supply system |
| CN101258103A (en) * | 2005-09-07 | 2008-09-03 | 丰田自动车株式会社 | Hydrogen supply apparatus and fuel gas supply apparatus |
| CN103181013A (en) * | 2010-10-28 | 2013-06-26 | 丰田自动车株式会社 | Fuel supply system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111174088B (en) | 2021-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109830708B (en) | Coupling heat management system of fuel cell automobile power assembly | |
| CN201314692Y (en) | Electromagnetic rapid water boiler | |
| CN110350266A (en) | A kind of battery liquid cooling system and battery | |
| CN201359379Y (en) | Embedded heating device for canned asphalt | |
| CN111174088B (en) | Temperature drop control system and method for deflation process of high-pressure gas cylinder | |
| CN111326768A (en) | Hydrogen system of fuel cell and hydrogen storage module of hydrogen system | |
| CN101512236B (en) | Combined heating/hot water system for a vehicle | |
| CN204693042U (en) | The high-pressure natural gas depressurized system that a kind of heat supply is not delayed | |
| CN2906521Y (en) | Multifunctional water heating device by reclaiming waste heat | |
| CN209247355U (en) | Engine cooling thermal impact system | |
| CN209524628U (en) | Water heater and its winterization system | |
| CN203532102U (en) | LNG (liquefied natural gas) vehicular bottle liquid outlet pipeline | |
| CN207662569U (en) | Heat exchangers for district heating leakage detection system | |
| CN101825350B (en) | Heat accumulating type anti-freeze solar heat collector system | |
| CN213811154U (en) | Frost protection system for water medium air heater | |
| CN212298519U (en) | Supercharging device for LNG vehicle-mounted gas cylinder | |
| CN211222959U (en) | Gas heating and supplying system | |
| CN109883232B (en) | Solid heat accumulator | |
| CN107389275A (en) | Heat exchangers for district heating leakage detection system and method | |
| CN208000071U (en) | A kind of extracting charging heat-exchange system | |
| CN201956160U (en) | Cooling device of a gas insulation transformer | |
| CN207527864U (en) | Solar water heater emptying valve system | |
| CN201315168Y (en) | Structure for improving internal pressure of still pipe segment | |
| CN201369176Y (en) | Structure for improving internal pressure of dead pipe section | |
| CN210680344U (en) | Water drainage pipeline system heated by automobile exhaust without heating |
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 |