CN113074315A - Heat management system and heat management control method of hydrogen station - Google Patents

Heat management system and heat management control method of hydrogen station Download PDF

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Publication number
CN113074315A
CN113074315A CN202110233159.8A CN202110233159A CN113074315A CN 113074315 A CN113074315 A CN 113074315A CN 202110233159 A CN202110233159 A CN 202110233159A CN 113074315 A CN113074315 A CN 113074315A
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hydrogen
temperature
power
station
cooling liquid
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CN113074315B (en
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刘敏
林今
钱洲亥
张信真
胡建根
李汶颖
侯力
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Tsinghua University
Electric Power Research Institute of State Grid Zhejiang Electric Power Co Ltd
Sichuan Energy Internet Research Institute EIRI Tsinghua University
Hangzhou Yineng Energy Retrenchment Technology Co
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Tsinghua University
Electric Power Research Institute of State Grid Zhejiang Electric Power Co Ltd
Sichuan Energy Internet Research Institute EIRI Tsinghua University
Hangzhou Yineng Energy Retrenchment Technology Co
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    • 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
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/06—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with compressed gases
    • 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
    • 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
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/04—Arrangement or mounting of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/02—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/001—Arrangement or mounting of control or safety devices for cryogenic fluid systems
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/012—Hydrogen
    • 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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0157—Compressors
    • 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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0337—Heat exchange with the fluid by cooling
    • F17C2227/0341—Heat exchange with the fluid by cooling using another fluid
    • F17C2227/0355—Heat exchange with the fluid by cooling using another fluid in a closed loop
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/32—Hydrogen storage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/45—Hydrogen technologies in production processes

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The invention discloses a thermal management system and a thermal management control method of a hydrogen station, and belongs to the technical field of hydrogen station equipment. The invention discloses a heat management system of a hydrogenation station, which comprises a first temperature sensor, a second temperature sensor, a cooling liquid pump, an industrial refrigerator and a heat management controller. The thermal management controller is provided with a chip, and the chip can control the rotating speed of the cooling liquid pump and the refrigerating power of the industrial refrigerator according to the temperature data of the first temperature sensor and/or the second temperature sensor so as to control the temperature of hydrogen at the outlets of the compressor and the pressure reducing valve. Through continuous exploration and test, the invention is provided with the thermal management system for the external hydrogen supply hydrogen filling station, and can carry out accurate integrated control on the hydrogen temperature at the outlet of the compressor and the outlet of the pressure reducing valve. According to the invention, double cooling arrangement of hydrogen compression and high-pressure hydrogen decompression can be realized only by one set of cooling liquid pump and industrial refrigerator, so that the energy consumption and cost of heat management of the hydrogenation station are effectively reduced.

Description

Heat management system and heat management control method of hydrogen station
Technical Field
The invention relates to a thermal management system and a thermal management control method of a hydrogen station, belonging to the technical field of hydrogen station equipment.
Background
At present, the integration and control of key equipment are mainly realized in the construction process of a hydrogen energy hydrogenation station, and the comprehensive design and control of a heat management system of various equipment are not yet carried out; generally, separate heat management equipment needs to be respectively assembled on the compressor and the pressure reducing valve outlet in the hydrogen station, so that the redundant configuration of the heat management equipment in the hydrogen station is caused, the energy consumption and the cost of the heat management of the hydrogen station are increased, and the popularization and the use are not facilitated.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a thermal management system and a thermal management control method for an external hydrogen supply hydrogenation station, which can carry out precise integrated control on the hydrogen temperature at the outlet of a compressor and the outlet of a pressure reducing valve so as to improve the control precision of the temperature in the hydrogenation station; the double cooling arrangement of hydrogen compression and high-pressure hydrogen decompression can be realized only by one set of cooling liquid pump and industrial refrigerator, so that the energy consumption and cost of the heat management of the hydrogenation station are effectively reduced, the hydrogen temperature in the hydrogenation process can be effectively ensured to meet the technical specification requirement, and the potential safety hazard is reduced; furthermore, the invention can dynamically adjust the power of the refrigerator and the motor power of the cooling pump according to different operation modes of the external hydrogen supply hydrogenation station and by combining the temperature sensor in the heat exchanger, thereby effectively reducing the energy consumption of the heat management system, saving energy, having detailed scheme, being convenient to realize and being beneficial to popularization and use.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a heat management system of a hydrogen adding station is provided,
the system comprises a first temperature sensor assembled at the outlet of a compressor, a second temperature sensor assembled at the outlet of a hydrogen pressure reducing valve, a cooling liquid pump used for adjusting the flow speed of cooling liquid, an industrial refrigerator used for cooling the cooling liquid, and a thermal management controller capable of acquiring the operation data of the equipment;
the cooling liquid pump is communicated with the industrial refrigerator through a liquid circulation pipeline;
the thermal management controller is provided with a chip, and the chip can control the rotating speed of the cooling liquid pump and the refrigerating power of the industrial refrigerator according to the temperature data of the first temperature sensor and/or the second temperature sensor so as to control the temperature of hydrogen at the outlets of the compressor and the pressure reducing valve.
Through continuous exploration and test, the invention is provided with the thermal management system for the external hydrogen supply hydrogenation station, and can carry out accurate integrated control on the hydrogen temperature at the outlet of the compressor and the outlet of the pressure reducing valve so as to improve the temperature control accuracy in the hydrogenation station.
According to the invention, double cooling arrangement of hydrogen compression and high-pressure hydrogen decompression can be realized only by one set of cooling liquid pump and industrial refrigerator, so that the energy consumption and cost of heat management of the hydrogenation station are effectively reduced, the hydrogen temperature in the hydrogenation process can be effectively ensured to meet the technical specification requirement, and the potential safety hazard is reduced.
Furthermore, the invention combines the temperature sensor in the heat exchanger, can dynamically adjust the power of the refrigerator and the motor power of the cooling pump, effectively reduces the energy consumption of the heat management system, avoids energy waste caused by a constant operation mode of the heat management system, saves energy, has detailed scheme, is convenient to realize and is beneficial to popularization and use.
As a preferable technical measure:
the heat exchanger I is assembled at the outlet of the compressor, and the heat exchanger II is assembled at the outlet of the hydrogen pressure reducing valve;
the first temperature sensor is assembled in the first heat exchanger;
and the second temperature sensor is assembled in the second heat exchanger.
As a preferable technical measure:
the liquid circulation pipeline is provided with a pressure gauge for detecting the pressure of the cooling liquid and a liquid injection port for injecting the cooling liquid.
And a pressure gauge in the liquid circulation pipeline is used for detecting the pressure of the cooling liquid so as to ensure that the cooling liquid is in a safety range. The liquid injection port is used for supplementing or replacing cooling liquid in the liquid circulation pipeline.
As a preferable technical measure:
the cooling liquid is ethylene glycol aqueous solution or calcium chloride aqueous solution.
And determining the concentration of ethylene glycol or calcium chloride according to the lowest environmental temperature of the hydrogen filling station so as to avoid the cooling liquid from solidifying under the low-temperature condition.
As a preferable technical measure:
a thermal management control method of a hydrogen station is applied to the thermal management system of the hydrogen station, and comprises the following contents:
firstly, establishing a refrigeration model related to the relation between the temperature and the adjustment of the rotating speed of a cooling liquid pump and the power of an industrial refrigerator;
secondly, acquiring a first hydrogen temperature value at the outlet of the compressor and a second hydrogen temperature value at the outlet of the hydrogen pressure reducing valve in real time
Inputting the hydrogen temperature value I and/or the hydrogen temperature value II into a refrigeration model to obtain regulation data;
and fourthly, dynamically adjusting the rotating speed of the cooling liquid pump and the refrigerating power of the industrial refrigerator according to the adjusting data so as to control the flowing speed and the temperature of the cooling liquid.
The heat management control method can carry out precise integrated control on the hydrogen temperature at the outlet of the compressor and the outlet of the pressure reducing valve so as to improve the temperature control precision in the hydrogenation station. Meanwhile, the dual cooling arrangement of hydrogen compression and high-pressure hydrogen decompression can be realized only by one set of cooling liquid pump and industrial refrigerator, so that the energy consumption and cost of the heat management of the hydrogenation station are effectively reduced, the hydrogen temperature in the hydrogenation process can be effectively ensured to meet the technical specification requirement, and the potential safety hazard is reduced.
The invention can dynamically adjust the power of the refrigerator and the motor power of the cooling pump by combining the temperature sensor in the heat exchanger, effectively reduces the energy consumption of the heat management system, avoids energy waste caused by a constant operation mode of the heat management system, saves energy, has detailed scheme, is convenient to realize and is beneficial to popularization and use.
As a preferable technical measure:
the refrigeration model is provided with at least 3 operation control modes according to refrigeration requirements of different operation states in the hydrogen filling station; it includes: a first control mode in which the hydrogen compressor and the pressure reducing valve are operated simultaneously, a second control mode in which the hydrogen compressor is not operated while the pressure reducing valve is operated; a third control mode based on neither the compressor nor the pressure reducing valve being operational.
As a preferable technical measure:
the first control mode simultaneously controls the motor power of the refrigerating liquid pump and the refrigerating power of the industrial refrigerating machine so as to better meet the heat management requirement of the hydrogenation station in a first operation state;
the relation between the temperature and the power of the motor of the cooling liquid pump and the power of the industrial refrigerating machine is as follows:
Figure BDA0002956824450000031
wherein, T1The temperature of a first temperature sensor of the hydrogenation station in a first control mode;
a11、a12、b11、b12、c1、d1the coefficient is a coefficient in the relational expression and is obtained by calculating test data of the thermal management system under different working conditions; t is tatIs ambient temperature;
Pcppower of the cooling liquid pump;
Pccis the power of an industrial refrigerator;
tatis ambient temperature;
a11、a12、b11、b12、c1、d1the preferred values are-0.03, -0.21, -0.08, -0.67, 0.08 and-258.7, respectively.
When the hydroprocessing station is operating in the first control mode:
when the temperature T of the first temperature sensor1Greater than t1At that time, the thermal management controller increases the power P of the cooling liquid pumpcp1To Pcp2While simultaneously adjusting the power P of the industrial refrigeratorcc1Is increased to Pcc2The refrigerating capacity of the heat management system is improved;
wherein t is1The hydrogen safety temperature;
as the temperature of the first temperature sensor decreases, T1Less than t1At that time, the thermal management controller reduces the power of the two devices to Pcp1And Pcc1。
As a preferable technical measure:
the second controlThe power of the liquid cooling pump is controlled only in the control mode, and the power of the industrial refrigerator is maintained at Pcc1The heat management requirement of the hydrogenation station in the second operation state is met;
the relation between the temperature and the power of the motor of the cooling liquid pump and the power of the industrial refrigerating machine is as follows:
Figure BDA0002956824450000032
wherein, T2Temperature of a first temperature sensor for the hydrogen station in the second control mode, a21、a22、c2、d2The coefficient is a coefficient in the relational expression and is obtained by calculating test data of the thermal management system under different working conditions;
a21、a22、c2、d2the preferred values are-0.11, -0.73, 0.05 and-235.3, respectively. When the first temperature sensor is at the first temperature T when the hydrogen station is operated in the second control mode2Greater than t2At that time, the thermal management controller increases the power P of the liquid pumpcp1To Pcp2The refrigerating capacity of the heat management system is improved;
wherein t is2The hydrogen safety temperature;
as the temperature of the first temperature sensor decreases, T2Less than t2At that time, the thermal management controller reduces the power of the two devices to Pcp1。
As a preferable technical measure:
the third control mode reduces the power of the industrial refrigerator to the power P of the standby statecc0The cooling liquid pump is also reduced to the lowest power Pcp0。
As a preferable technical measure:
t1is 5 ℃; t is t2The temperature was 8 ℃.
Compared with the prior art, the invention has the following beneficial effects:
through continuous exploration and test, the invention is provided with the thermal management system for the external hydrogen supply hydrogenation station, and can carry out accurate integrated control on the hydrogen temperature at the outlet of the compressor and the outlet of the pressure reducing valve so as to improve the temperature control accuracy in the hydrogenation station.
According to the invention, double cooling arrangement of hydrogen compression and high-pressure hydrogen decompression can be realized only by one set of cooling liquid pump and industrial refrigerator, so that the energy consumption and cost of heat management of the hydrogenation station are effectively reduced, the hydrogen temperature in the hydrogenation process can be effectively ensured to meet the technical specification requirement, and the potential safety hazard is reduced.
Furthermore, the invention can dynamically adjust the power of the refrigerator and the motor power of the cooling pump according to different operation modes of the external hydrogen supply hydrogenation station by combining the temperature sensor in the heat exchanger, thereby effectively reducing the energy consumption of the thermal management system, avoiding the energy waste caused by the constant operation mode of the thermal management system, saving the energy, having detailed scheme and convenient realization, and being beneficial to popularization and use.
Drawings
FIG. 1 is a connection diagram of a thermal management controller of the present invention;
FIG. 2 is a schematic diagram of a 35MPa hydrogen station according to the present invention;
FIG. 3 is a schematic diagram of the equipment connections of the thermal management system of the 35MPa hydrogen station of the present invention;
FIG. 4 is a schematic diagram of a 70MPa hydrogen station according to the present invention;
FIG. 5 is a schematic diagram of the equipment connection of the thermal management system of the 70MPa hydrogen refueling station.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
On the contrary, the invention is intended to cover alternatives, modifications, equivalents and alternatives which may be included within the spirit and scope of the invention as defined by the appended claims. Furthermore, in the following detailed description of the present invention, certain specific details are set forth in order to provide a better understanding of the present invention. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1 to 5, a thermal management system of a hydrogen refueling station comprises a first temperature sensor for being mounted at an outlet of a compressor, a second temperature sensor for being mounted at an outlet of a hydrogen pressure reducing valve, a cooling liquid pump for adjusting the flow speed of the cooling liquid, an industrial refrigerator for cooling the cooling liquid, a thermal management controller capable of acquiring operation data of equipment, a first heat exchanger for being mounted at the outlet of the compressor, and a second heat exchanger for being mounted at the outlet of the hydrogen pressure reducing valve.
The cooling liquid pump is communicated with the industrial refrigerator through a liquid circulation pipeline;
the thermal management controller is provided with a chip, and the chip can control the rotating speed of the cooling liquid pump and the refrigerating power of the industrial refrigerator according to the temperature data of the first temperature sensor and/or the second temperature sensor so as to control the temperature of hydrogen at the outlets of the compressor and the pressure reducing valve.
The first temperature sensor is assembled in the first heat exchanger;
and the second temperature sensor is assembled in the second heat exchanger.
Through continuous exploration and test, the invention is provided with the thermal management system for the external hydrogen supply hydrogenation station, and can carry out accurate integrated control on the hydrogen temperature at the outlet of the compressor and the outlet of the pressure reducing valve so as to improve the temperature control accuracy in the hydrogenation station.
According to the invention, double cooling arrangement of hydrogen compression and high-pressure hydrogen decompression can be realized only by one set of cooling liquid pump and industrial refrigerator, so that the energy consumption and cost of heat management of the hydrogenation station are effectively reduced, the hydrogen temperature in the hydrogenation process can be effectively ensured to meet the technical specification requirement, and the potential safety hazard is reduced.
Furthermore, the invention can dynamically adjust the power of the refrigerator and the motor power of the cooling pump according to different operation modes of the external hydrogen supply hydrogenation station by combining the temperature sensor in the heat exchanger, thereby effectively reducing the energy consumption of the thermal management system, avoiding the energy waste caused by the constant operation mode of the thermal management system, saving the energy, having detailed scheme and convenient realization, and being beneficial to popularization and use.
The liquid circulation pipeline is provided with a pressure gauge for detecting the pressure of the cooling liquid and a liquid injection port for injecting the cooling liquid.
And a pressure gauge in the liquid circulation pipeline is used for detecting the pressure of the cooling liquid so as to ensure that the cooling liquid is in a safety range. The liquid injection port is used for supplementing or replacing cooling liquid in the liquid circulation pipeline.
The cooling liquid is ethylene glycol aqueous solution or calcium chloride aqueous solution.
And determining the concentration of ethylene glycol or calcium chloride according to the lowest environmental temperature of the hydrogen filling station so as to avoid the cooling liquid from solidifying under the low-temperature condition.
The control method of the invention comprises the following specific embodiments:
a thermal management control method of a hydrogen station is applied to the thermal management system of the hydrogen station, and comprises the following contents:
firstly, establishing a refrigeration model related to the relation between the temperature and the adjustment of the rotating speed of a cooling liquid pump and the power of an industrial refrigerator;
secondly, acquiring a first hydrogen temperature value at the outlet of the compressor and a second hydrogen temperature value at the outlet of the hydrogen pressure reducing valve in real time
Inputting the hydrogen temperature value I and/or the hydrogen temperature value II into a refrigeration model to obtain regulation data;
and fourthly, dynamically adjusting the rotating speed of the cooling liquid pump and the refrigerating power of the industrial refrigerator according to the adjusting data so as to control the flowing speed and the temperature of the cooling liquid.
The heat management control method can carry out precise integrated control on the hydrogen temperature at the outlet of the compressor and the outlet of the pressure reducing valve so as to improve the temperature control precision in the hydrogenation station. Meanwhile, the dual cooling arrangement of hydrogen compression and high-pressure hydrogen decompression can be realized only by one set of cooling liquid pump and industrial refrigerator, so that the energy consumption and cost of the heat management of the hydrogenation station are effectively reduced, the hydrogen temperature in the hydrogenation process can be effectively ensured to meet the technical specification requirement, and the potential safety hazard is reduced.
Furthermore, the invention can dynamically adjust the power of the refrigerator and the motor power of the cooling pump by combining the temperature sensor in the heat exchanger, effectively reduces the energy consumption of the heat management system, avoids energy waste caused by a constant operation mode of the heat management system, saves energy, has detailed scheme, is convenient to realize and is beneficial to popularization and use.
The refrigeration model is provided with at least 3 operation control modes according to refrigeration requirements of different operation states in the hydrogen filling station; it includes: a first control mode in which the hydrogen compressor and the pressure reducing valve are operated simultaneously, a second control mode in which the hydrogen compressor is not operated while the pressure reducing valve is operated; a third control mode based on neither the compressor nor the pressure reducing valve being operational.
First control mode embodiment of the invention:
the first control mode simultaneously controls the motor power of the refrigerating liquid pump and the refrigerating power of the industrial refrigerating machine so as to better meet the heat management requirement of the hydrogenation station in a first operation state;
the relation between the temperature and the power of the motor of the cooling liquid pump and the power of the industrial refrigerating machine is as follows:
Figure BDA0002956824450000061
wherein, T1The temperature of a first temperature sensor of the hydrogenation station in a first control mode; a is11、a12、b11、b12、c1、d1The coefficient is a coefficient in the relational expression and is obtained by calculating test data of the thermal management system under different working conditions; t is tatIs ambient temperature;
Pcppower of the cooling liquid pump;
Pccis the power of an industrial refrigerator;
tatis ambient temperature;
a11、a12、b11、b12、c1、d1the preferred values are-0.03, -0.21, -0.08, -0.67, 0.08 and-258.7, respectively.
When the hydroprocessing station is operating in the first control mode:
when the temperature T of the first temperature sensor1Greater than t1At that time, the thermal management controller increases the power P of the cooling liquid pumpcp1To Pcp2While simultaneously adjusting the power P of the industrial refrigeratorcc1Is increased to Pcc2The refrigerating capacity of the heat management system is improved;
wherein t is1The hydrogen safety temperature;
as the temperature of the first temperature sensor decreases, T1Less than t1At that time, the thermal management controller reduces the power of the two devices to Pcp1And Pcc1。
Second control mode embodiment of the invention:
the second control mode only controls the power of the liquid cooling pump, and the power of the industrial refrigerator is maintained at Pcc1The heat management requirement of the hydrogenation station in the second operation state is met;
the relation between the temperature and the power of the motor of the cooling liquid pump and the power of the industrial refrigerating machine is as follows:
Figure BDA0002956824450000071
wherein, T2Temperature of a first temperature sensor for the hydrogen station in the second control mode, a21、a22、c2、d2The coefficient is a coefficient in the relational expression and is obtained by calculating test data of the thermal management system under different working conditions;
a21、a22、c2、d2the preferred values are-0.11, -0.73, 0.05 and-23 respectively5.3。
When the first temperature sensor is at the first temperature T when the hydrogen station is operated in the second control mode2Greater than t2At that time, the thermal management controller increases the power P of the liquid pumpcp1To Pcp2The refrigerating capacity of the heat management system is improved;
wherein t is2The hydrogen safety temperature;
as the temperature of the first temperature sensor decreases, T2Less than t2At that time, the thermal management controller reduces the power of the two devices to Pcp1。
Third control mode embodiment of the invention: :
the third control mode reduces the power of the industrial refrigerator to the power P of the standby statecc0The cooling liquid pump is also reduced to the lowest power Pcp0。
t1Is 5 ℃; t is t2The temperature was 8 ℃.
A preferred embodiment of the invention:
a heat management system of a hydrogenation station comprises a cooling liquid pump, a liquid circulation pipeline, a liquid injection port, a hydraulic gauge, an industrial refrigerator, a temperature sensor and a heat management controller. The thermal management controller is accessed to the operation data of key equipment in the hydrogen refueling station, and can control the thermal management system according to the operation plan of the equipment in the hydrogen refueling station. And the thermal management controller controls the rotating speed of the liquid pump and the air speed of the industrial refrigerator according to the temperature sensed by the temperature in the circulating pipeline so as to control the temperature of the outlet hydrogen of the compressor and the hydrogen storage tank.
The method comprises the steps that a thermal management system receives key equipment operation state data, wherein the key equipment operation state data comprise trailer hydrogen pressure data; hydrogen pressure data of the hydrogen storage tank; the starting and stopping state, the gas flow, the fault state and the like of the hydrogenation gun; the starting and stopping state, power, air flow, fault state and the like of the compressor; the method comprises the steps of long-tube trailer replacement planning of a station control management system, hydrogen energy automobile hydrogenation load prediction, hydrogenation station environment temperature and the like.
The station control management system and the heat pipe system are in two-way communication, and the station control management system can directly issue a regulation and control instruction to the heat management system in an emergency so as to meet the heat management requirement in the emergency.
The rotation speed of the cooling liquid pump is adjusted by controlling the power of the pump motor. The industrial refrigerator can guarantee the temperature of the liquid at the outlet by adjusting the power of the device, and can also receive the instruction of the thermal management system controller to adjust the refrigeration power.
The cooling liquid can be ethylene glycol aqueous solution or calcium chloride aqueous solution, and the concentration of ethylene glycol or calcium chloride is determined according to the lowest environmental temperature of the hydrogen station so as to prevent the cooling liquid from solidifying under the low-temperature condition.
The heat management system is suitable for the equipment heat management of 35MPa and 70MPa hydrogen adding stations.
The equipment connection relationship in the external supply hydrogenation station is that a hydrogen long tube trailer enters a hydrogen compressor through a gas discharging column, the compressor pressurizes hydrogen and enters a medium-pressure hydrogen storage tank through a sequential operation disc, the hydrogen in the hydrogen storage tank passes through a pressurizing valve and a hydrogenation gun, and the hydrogenation gun is connected with a hydrogen cylinder in a hydrogen energy automobile for hydrogenation service.
The pressure of the hydrogen long-tube trailer is 20MPa at most according to the national standard. The 35MPa hydrogenation station adopts a medium-pressure hydrogen storage tank, and the internal gas pressure range is 35 MPa-45 MPa; the 70MPa hydrogenation station adopts a high-pressure hydrogen storage tank, and the internal gas pressure range is 70 MPa-85 MPa.
The temperature of the hydrogen rises during the process that the compressor compresses the hydrogen into the important hydrogen storage tank from the long-tube trailer, so that the temperature of the hydrogen at the outlet of the compressor is 110-135 ℃, and refrigeration is needed to reduce the temperature of the hydrogen. At present, the method of the cold area at the outlet of the compressor is industrial fan air cooling or air convection cooling, the temperature control method is relatively extensive, and the influence of the environmental temperature is large. The conversion temperature of the hydrogen is 204.6K (-68.55 ℃), and the expansion process higher than the temperature is heated, and even if the hydrogen is cooled to-40 ℃, the pressure reduction expansion of the hydrogen is also heated in the hydrogenation process, so the important reason for precooling is needed in the high-pressure hydrogenation process. When the hydrogen is decompressed from the medium-pressure hydrogen storage tank and enters the hydrogen energy automobile, the temperature of the hydrogen is increased, and precooling is needed.
As shown in fig. 2-3, the present invention relates to an embodiment of a 35MPa external hydrogen supply hydrogen station.
The hydrogen is transported to a hydrogenation station from a hydrogen source by the long-tube trailer, the hydrogen enters the compressor from the long-tube trailer through the gas discharging column, the compressor pressurizes the hydrogen and then presses the hydrogen into a medium-pressure hydrogen storage tank (35 MPa-45 MPa), and the hydrogen enters the hydrogen storage bottle in the car from the medium-pressure hydrogen storage tank through the pressure reducing valve and the hydrogenation gun in the hydrogenation process of the hydrogen-powered car.
The pressure of hydrogen in a hydrogen long tube trailer in a 35MPa external hydrogen supply hydrogenation station is 8 MPa-20 MPa, a hydrogen compressor compresses the hydrogen from a gas cylinder of the long tube trailer to a medium-pressure hydrogen storage tank, and the pressure of the hydrogen in the medium-pressure hydrogen storage tank is 35 MPa-45 MPa. The greater the inlet and outlet pressure difference of the compressor during compression, the more the compressor does work, resulting in a higher outlet temperature of the compressor. The outlet temperature of the hydrogen compressor is about 110 ℃ to 135 ℃, and the temperature of the hydrogen is reduced by the heat management system through the cooling liquid to be lower than 20 ℃. In the hydrogenation process of a 35MPa external hydrogen supply hydrogenation station, hydrogen needs to be decompressed from a medium-pressure hydrogen storage tank and enters a hydrogen storage bottle in a hydrogen energy automobile, and the pressure difference between the hydrogen storage bottle and the medium-pressure hydrogen storage tank is relatively small, so that the temperature rise amplitude is relatively small. In order to ensure the safety of the hydrogenation service and meet the technical specifications of the hydrogenation station, the heat management system utilizes the cooling liquid to cool the hydrogen. And the temperature sensor II is only used for monitoring the temperature of the heat exchanger at the position and does not participate in the control of the thermal management system because the temperature rise amplitude at the position is small.
The industrial refrigerator cools the cooling liquid in the liquid circulation cooling system, and the temperature of the outlet liquid is controlled at t0And the heat management system controls the power of the industrial refrigerator to ensure that the temperature of the liquid at the outlet reaches a set value. And the cooling liquid in the cooling circulation system reaches a heat exchanger at the outlet of the pressure reducing valve after coming out of the industrial refrigerator, and the cooling liquid exchanges heat with the hydrogen pipeline at the position to cool the decompressed hydrogen.
And a first temperature sensor is arranged on the heat exchanger at the outlet of the compressor and used for monitoring the temperature of the hydrogen at the outlet of the compressor. And under the automatic control mode, the heat management system of the hydrogen station controls the rotating speed of the cooling liquid pump according to the temperature of the first temperature sensor so as to adjust the liquid flowing speed in the cooling liquid circulating system.
And a second temperature sensor is arranged on the heat exchanger at the outlet of the hydrogen pressure reducing valve and used for monitoring the temperature of the hydrogen at the outlet of the pressure reducing valve. And the cooling liquid in the cooling circulation system enters the heat exchanger at the outlet of the hydrogen compressor after coming out of the heat exchanger at the outlet of the pressure reducing valve, and exchanges heat with the hydrogen pipeline at the position of the heat exchanger so as to cool the compressed hydrogen.
The pressure gauge in the cooling liquid circulating system is used for detecting the pressure of the cooling liquid so as to ensure that the cooling liquid is in a safe range. The liquid injection port is used for supplementing or replacing the cooling liquid in the cooling liquid circulating system.
As shown in fig. 4-5, the present invention relates to an embodiment of a 70MPa external hydrogen supply hydrogen station.
The hydrogen is transported to a hydrogenation station from a hydrogen source by the long-tube trailer, the hydrogen enters the compressor from the long-tube trailer through the gas discharging column, the compressor pressurizes the hydrogen and then presses the hydrogen into a high-pressure hydrogen storage tank (70 MPa-85 MPa), and the hydrogen enters the hydrogen storage bottle in the car from the high-pressure hydrogen storage tank through a pressure reducing valve and a hydrogenation gun in the hydrogenation process of the hydrogen-powered car.
The pressure of hydrogen in a hydrogen long tube trailer in a 70MPa external hydrogen supply hydrogenation station is 8 MPa-20 MPa, a hydrogen compressor compresses the hydrogen from a gas cylinder of the long tube trailer to a medium-pressure hydrogen storage tank, and the pressure of the hydrogen in a high-pressure hydrogen storage tank is 70 MPa-85 MPa. The greater the inlet and outlet pressure difference of the compressor during compression, the more the compressor does work, resulting in a higher outlet temperature of the compressor. The hydrogen compressor outlet temperature is about 110 ℃ to 135 ℃, where the thermal management system uses a coolant to reduce the hydrogen temperature to a temperature below 20 ℃. In the hydrogenation process of a 70MPa external hydrogen supply hydrogenation station, hydrogen needs to be decompressed from a high-pressure hydrogen storage tank and enters a hydrogen storage bottle in a hydrogen energy automobile, and the pressure difference between the hydrogen storage bottle and the high-pressure hydrogen storage tank is relatively small, so that the temperature rise amplitude is relatively small. In order to ensure the safety of the hydrogenation service and meet the technical specifications of the hydrogenation station, the heat management system utilizes the cooling liquid to cool the hydrogen. And the temperature sensor II is only used for monitoring the temperature of the heat exchanger at the position and does not participate in the control of the thermal management system because the temperature rise amplitude at the position is small.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.

Claims (10)

1. A heat management system of a hydrogen station is characterized in that,
the system comprises a first temperature sensor assembled at the outlet of a compressor, a second temperature sensor assembled at the outlet of a hydrogen pressure reducing valve, a cooling liquid pump used for adjusting the flow speed of cooling liquid, an industrial refrigerator used for cooling the cooling liquid, and a thermal management controller capable of acquiring the operation data of the equipment;
the cooling liquid pump is communicated with the industrial refrigerator through a liquid circulation pipeline;
the thermal management controller is provided with a chip, and the chip can control the rotating speed of the cooling liquid pump and the refrigerating power of the industrial refrigerator according to the temperature data of the first temperature sensor and/or the second temperature sensor so as to control the temperature of hydrogen at the outlets of the compressor and the pressure reducing valve.
2. The thermal management system of a hydrogen refueling station according to claim 1,
the heat exchanger I is assembled at the outlet of the compressor, and the heat exchanger II is assembled at the outlet of the hydrogen pressure reducing valve;
the first temperature sensor is assembled in the first heat exchanger;
and the second temperature sensor is assembled in the second heat exchanger.
3. The thermal management system of a hydrogen refueling station according to claim 1,
the liquid circulation pipeline is provided with a pressure gauge for detecting the pressure of the cooling liquid and a liquid injection port for injecting the cooling liquid.
4. The thermal management system of a hydrogen refueling station according to claim 1,
the cooling liquid is ethylene glycol aqueous solution or calcium chloride aqueous solution.
5. A thermal management control method of a hydrogenation station is characterized in that,
a thermal management system for a hydroprocessing station as defined in any one of claims 1-4, comprising:
firstly, establishing a refrigeration model related to the relation between the temperature and the adjustment of the rotating speed of a cooling liquid pump and the power of an industrial refrigerator;
secondly, acquiring a first hydrogen temperature value at the outlet of the compressor and a second hydrogen temperature value at the outlet of the hydrogen pressure reducing valve in real time
Inputting the hydrogen temperature value I and/or the hydrogen temperature value II into a refrigeration model to obtain regulation data;
and fourthly, dynamically adjusting the rotating speed of the cooling liquid pump and the refrigerating power of the industrial refrigerator according to the adjusting data so as to control the flowing speed and the temperature of the cooling liquid.
6. The method of claim 5, wherein the control unit is further configured to control the thermal management of the hydroprocessing unit,
the refrigeration model is provided with at least 3 operation control modes according to refrigeration requirements of different operation states in the hydrogen filling station; it includes: a first control mode in which the hydrogen compressor and the pressure reducing valve are operated simultaneously, a second control mode in which the hydrogen compressor is not operated while the pressure reducing valve is operated; a third control mode based on neither the compressor nor the pressure reducing valve being operational.
7. The method of claim 6, wherein the control unit is further configured to control the thermal management of the hydroprocessing station,
the first control mode simultaneously controls the motor power of the refrigerating liquid pump and the refrigerating power of the industrial refrigerating machine so as to better meet the heat management requirement of the hydrogenation station in a first operation state;
the relation between the temperature and the power of the motor of the cooling liquid pump and the power of the industrial refrigerating machine is as follows:
Figure FDA0002956824440000021
wherein, T1The temperature of a first temperature sensor of the hydrogenation station in a first control mode;
a11、a12、b11、b12、c1、d1the coefficient is a coefficient in the relational expression and is obtained by calculating test data of the thermal management system under different working conditions; t is tatIs ambient temperature;
Pcppower of the cooling liquid pump;
Pccis the power of an industrial refrigerator;
tatis ambient temperature;
when the hydroprocessing station is operating in the first control mode:
when the temperature T of the first temperature sensor1Greater than t1At that time, the thermal management controller increases the power P of the cooling liquid pumpcp1To Pcp2While simultaneously adjusting the power P of the industrial refrigeratorcc1Is increased to Pcc2The refrigerating capacity of the heat management system is improved;
wherein t is1The hydrogen safety temperature;
as the temperature of the first temperature sensor decreases, T1Less than t1At that time, the thermal management controller reduces the power of the two devices to Pcp1And Pcc1。
8. The method of claim 7, wherein the control of the thermal management of the hydroprocessing station,
the second control mode only controls the power of the liquid cooling pump, and the power of the industrial refrigerator is maintained at Pcc1The heat management requirement of the hydrogenation station in the second operation state is met;
the relation between the temperature and the power of the motor of the cooling liquid pump and the power of the industrial refrigerating machine is as follows:
Figure FDA0002956824440000022
wherein, T2Temperature of a first temperature sensor for the hydrogen station in the second control mode, a21、a22、c2、d2The coefficient is a coefficient in the relational expression and is obtained by calculating test data of the thermal management system under different working conditions;
when the first temperature sensor is at the first temperature T when the hydrogen station is operated in the second control mode2Greater than t2At that time, the thermal management controller increases the power P of the liquid pumpcp1To Pcp2Improving the refrigeration capacity of the heat management system；
Wherein t is2The hydrogen safety temperature;
as the temperature of the first temperature sensor decreases, T2Less than t2At that time, the thermal management controller reduces the power of the two devices to Pcp1。
9. The method of claim 8, wherein the control of the thermal management of the hydroprocessing station,
the third control mode reduces the power of the industrial refrigerator to the power P of the standby statecc0The cooling liquid pump is also reduced to the lowest power Pcp0。
10. The heat management control method of a hydrogen station according to claim 9, characterized in that t1Is 5 ℃; t is t2The temperature was 8 ℃.
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