阅读说明：本技术 高压管束车供氢加氢站设备选型方法 (Model selection method for high-pressure tube bundle vehicle hydrogen supply station equipment ) 是由 刘欢 张健中 陶彬 许光 王振中 赵雯晴 于 2019-09-20 设计创作，主要内容包括：本发明涉及氢能源技术领域,具体涉及高压管束车供氢加氢站设备选型方法,所述高压管束车供氢加氢站设备选型方法,包括如下步骤：确定基本参数、氢气净化系统、氢气压缩机选型、设置储氢系统的压力等级及各压力等级下的储氢量比例、确定储氢系统、根据氢气加注压力等级确定是否设置氢气预冷系统、确定加氢机的数量。本发明针对高压管束车供氢加氢站这一典型具有普适性的加氢站工艺,提出了站内主要设备选型方法,建立了公式计算和工厂要求相结合的选型方法,为高压管束车供氢加氢站内设备选型以及加氢站设计建设提供依据。(The invention relates to the technical field of hydrogen energy, in particular to a method for selecting models of equipment of a hydrogen supply station of a high-pressure tube bundle vehicle, which comprises the following steps: determining basic parameters, a hydrogen purification system, a hydrogen compressor model selection, setting the pressure grade of a hydrogen storage system and the hydrogen storage quantity proportion under each pressure grade, determining the hydrogen storage system, determining whether to set a hydrogen precooling system or not according to the hydrogen filling pressure grade, and determining the number of hydrogenation machines. The invention provides a model selection method of main equipment in a station aiming at a typical universal hydrogen station process of a hydrogen supply hydrogen station of a high-pressure tube bundle vehicle, establishes a model selection method combining formula calculation and factory requirements, and provides a basis for model selection of equipment in the hydrogen supply hydrogen station of the high-pressure tube bundle vehicle and design and construction of the hydrogen station.)

1. The model selection method for the equipment of the high-pressure tube bundle vehicle hydrogen supply and hydrogenation station comprises the following steps: the hydrogen selecting method comprises the following steps:

s1: determining basic parameters: 1) pressure P of hydrogen carried by high-pressure tube bundle vehicle₀；

2) The purity and impurity content of hydrogen carried by a high-pressure tube bundle vehicle;

3) the daily hydrogenation amount m of the hydrogenation station;

4) judging whether the hydrogenation time is centralized or not, wherein the judging method comprises the following steps:

if the vehicle hydrogenation time is concentrated in a certain fixed time period, the vehicle hydrogenation time is concentrated, and the daily working time T of the hydrogenation station is counted according to 10 hours; otherwise, dispersing, and counting the daily working time of the hydrogenation station by 16 hours;

5) determining the hydrogen adding amount m of the hydrogen adding station per hour_TThe calculation formula is as follows:wherein m is the daily hydrogenation amount of the hydrogenation station, and T is the hydrogenation operation time;

6) determining the shutdown sensitivity, wherein if the user is mainly a bus, the shutdown sensitivity is high, otherwise, the shutdown sensitivity is low;

7) filling hydrogen into the pressure grade P;

s2: analyzing the purity and impurity content of the hydrogen carried by the high-pressure tube bundle vehicle, and judging whether a hydrogen purification system is arranged, wherein the judgment method comprises the following steps:

if the purity and the impurity content of the hydrogen carried by the high-pressure tube bundle vehicle simultaneously meet the following conditions: 1) the hydrogen mole fraction is not less than 99.99 percent; 2) the total amount of non-hydrogen gas is not more than 100 mu mol/mol; 3) the total sulfur content is not more than 0.004 mu mol/mol; 4) the CO content is not more than 0.2 mu mol/mol, the hydrogen purity and the impurity content are qualified, and a hydrogen purification system is not required to be added; otherwise, a hydrogen purification system is required to be arranged;

s3: and (3) selecting the type of a hydrogen compressor:

1) determining the displacement and the number of the hydrogen compressors;

when N is less than or equal to 25kW, if the shutdown sensitivity is high, two discharge capacities are selected as V_TThe hydrogen compressor of (1); if stopWhen the sensitivity is small, one displacement is selected to be V_TThe hydrogen compressor of (1);

when N is more than 25kW and less than or equal to 60kW, if the shutdown sensitivity is high, two discharge capacities are selected as V_TThe hydrogen compressor of (1); if the shutdown sensitivity is small, selecting one displacement as V_TOr two displacement volumes are V_T/2The hydrogen compressor of (1);

when N is more than 60kW, if the shutdown sensitivity is high, three discharge capacities are selected as V_T/2The hydrogen compressor of (1); if the shutdown sensitivity is small, two displacement volumes are selected as V_T/2The hydrogen compressor of (1);

wherein, V_TThe volume of hydrogen compressed in a unit hour,

n is the power of the hydrogen compressor,

ps is the absolute pressure of the inlet air of the hydrogen compressor, and the unit is Pa; p_dThe unit is Pa, and the unit is the absolute pressure of the exhaust gas of the hydrogen compressor; v_TIs the volume of compressed hydrogen in unit hour, m³/s；

2) Determining whether a hydrogen compressor cooling system is set;

according to exhaust temperature T_dDetermining whether a hydrogen compressor cooling system is set:

when exhaust temperature T_dWhen the temperature is lower than 170 ℃, a hydrogen compressor cooling system does not need to be additionally arranged;

when exhaust temperature T_dWhen the temperature is more than or equal to 170 ℃, a hydrogen compressor cooling system needs to be additionally arranged; wherein the content of the first and second substances,

ps is the absolute pressure of the inlet air of the hydrogen compressor, and the unit is Pa; p_dIs the absolute pressure of the exhaust gas of the hydrogen compressor, and the unit is Pa(ii) a Ts is the inlet gas temperature of the hydrogen compressor, and the unit is;

s4: the pressure grade of the hydrogen storage system and the hydrogen storage amount proportion under each pressure grade are set according to the hydrogen filling pressure grade P, and the method comprises the following steps:

1) if the hydrogen filling pressure grade is 70MPa, setting a low-pressure, medium-pressure and high-pressure three-stage hydrogen storage system, wherein the hydrogen storage quantity ratio of the low-pressure, medium-pressure and high-pressure three-stage hydrogen storage system is 1-3: 1-2: 1;

2) if the hydrogen filling pressure grades are 35MPa and 70MPa, setting a low-pressure, medium-pressure and high-pressure three-stage hydrogen storage system, wherein the hydrogen storage quantity ratio of the low-pressure, medium-pressure and high-pressure three-stage hydrogen storage system is 1-3: 1-2: 1;

3) if the hydrogen filling pressure grade is 35MPa, a low-pressure and medium-pressure two-stage hydrogen storage system is arranged, and the hydrogen storage quantity ratio of the low-pressure and medium-pressure two-stage hydrogen storage system is 1-2: 1;

s5: determining the hydrogen storage system according to the pressure grade of the hydrogen storage system, the hydrogen storage quantity proportion under each pressure grade and the daily hydrogenation quantity m of the hydrogenation station, wherein the method comprises the following steps:

1) if the daily hydrogen adding amount m of the hydrogen adding station is less than or equal to 500kg and the hydrogen adding pressure level is 35MPa, 1 low-pressure hydrogen storage device and 1 medium-pressure hydrogen storage device are arranged;

2) if the daily hydrogen adding amount m of the hydrogen adding station is less than or equal to 500kg and the hydrogen adding pressure level is 70MPa, 1 low-pressure hydrogen storage device, 1 medium-pressure hydrogen storage device and 1 high-pressure hydrogen storage device are arranged;

3) if the daily hydrogen adding amount of the hydrogen adding station is more than or equal to 500kg and less than 1000kg and the hydrogen adding pressure level is 35MPa, 1 low-pressure hydrogen storage device and 2 medium-pressure hydrogen storage devices are arranged;

4) if the daily hydrogen adding amount of the hydrogen adding station is more than or equal to 500kg and less than 1000kg and the hydrogen adding pressure grade is 70MPa, 1 low-pressure hydrogen storage device, 2 medium-pressure hydrogen storage devices and 1 high-pressure hydrogen storage device are arranged;

5) if the daily hydrogen addition of the hydrogen station is more than or equal to 1000kg and less than 2000kg, 2 low-pressure hydrogen storage devices, 3 medium-pressure hydrogen storage devices and 2 high-pressure hydrogen storage devices are arranged according to the design that the hydrogen filling pressure grade is 70 MPa;

s6: according to the hydrogen filling pressure grade, whether a hydrogen precooling system is set is determined, and the method comprises the following steps:

1) when the hydrogen filling pressure grade of the hydrogen station is 35MPa, a hydrogen precooling system is not arranged;

2) and when the hydrogen filling pressure grade of the hydrogen station is 70MPa, a hydrogen precooling system is arranged.

S7: determining the number of hydrogenators

In the formula (2)]For the operator of taking integer upwards, m₁Adding hydrogen with the hydrogen adding amount m under the pressure grade P of 35MPa₂Adding the hydrogen amount with the pressure grade P of 70MPa into the hydrogen, and calculating to obtain a numerical value which is the number of the hydrogenation machines.

2. The high-pressure tube bundle vehicle hydrogen supply station equipment model selection method according to claim 1, wherein in step S1, the hydrogen supply station daily hydrogen supply amount m is determined by one of the following two methods:

a) the value m is directly given;

b) calculating by the type and number of hydrogenation vehicles:

m＝5×N₁+20×N₂+15×N₃+m₄；

wherein N1 is the number of taxies, N2 is the number of buses, N3 is the number of passenger vehicles, and m4 is the number of hydrogen used by other vehicles.

3. The method for selecting the type of the hydrogen supplying station equipment of the high-pressure tube bundle vehicle as claimed in claim 1, wherein in step S2, the hydrogen purification system adopts a pressure swing adsorption hydrogen separation device.

4. The method for selecting the type of the equipment of the high-pressure tube bundle vehicle hydrogen supply station according to claim 3, wherein the device for separating hydrogen by pressure swing adsorption comprises 5 adsorption towers, wherein 1 adsorption tower is always in an adsorption state.

5. The method for selecting a hydrogen supply station equipment of a high-pressure tube bundle vehicle as claimed in claim 1, wherein in step S3, the hydrogen compressor cooling system comprises at least one selected from an air cooling system, a water cooling system and a cooling liquid cooling system.

6. The high-pressure tube bundle vehicle hydrogen supply station equipment type selection method according to claim 1, wherein in step S4, when the hydrogen filling pressure level is 70MPa, in the low-pressure, medium-pressure and high-pressure three-stage hydrogen storage system:

the high-pressure tube bundle vehicle is used as low-pressure hydrogen storage equipment, and the design pressure of hydrogen storage is P₀；

The design pressure of hydrogen storage of the medium-pressure hydrogen storage tank is 45 MPa; the hydrogen storage design pressure of the high-pressure hydrogen storage tank is 87.5 MPa.

7. The high-pressure tube bundle vehicle hydrogen supply station equipment type selection method according to claim 1, wherein in step S4, when the hydrogen filling pressure levels are 35MPa and 70MPa, in the low-pressure, medium-pressure and high-pressure three-stage hydrogen storage system:

the high-pressure tube bundle vehicle is used as low-pressure hydrogen storage equipment, and the design pressure of hydrogen storage is P₀；

The design pressure of hydrogen storage of the medium-pressure hydrogen storage tank is 45 MPa; the hydrogen storage design pressure of the high-pressure hydrogen storage tank is 87.5 MPa.

8. The high-pressure tube bundle vehicle hydrogen supply station equipment type selection method according to claim 1, 6 or 7, wherein in step S4, when the hydrogen filling pressure level is 35MPa, in the low-pressure and medium-pressure two-stage hydrogen storage system,

the high-pressure tube bundle vehicle is used as low-pressure hydrogen storage equipment, and the design pressure of hydrogen storage is P₀(ii) a The design pressure of hydrogen storage of the medium-pressure hydrogen storage tank is 45 MPa.

9. The method for selecting the type of equipment in a hydrogen supplying and hydrogen adding station of a high pressure tube bundle vehicle as claimed in claim 1, wherein in step S5, the low pressure hydrogen storage equipment is a high pressure tube bundle vehicle with hydrogen storage design pressure P₀The maximum hydrogen storage capacity is 350 kg/vehicle; and/or

The medium-pressure hydrogen storage equipment has a volume of 5m³The hydrogen storage tank has a hydrogen storage design pressure of 45MPa and a maximum hydrogen storage capacity of 145kg per tank; and/or

The high-pressure hydrogen storage equipment has a volume of 5m³The designed pressure of hydrogen storage of the hydrogen storage tank is 87.5MPa, and the maximum hydrogen storage capacity is 235kg per tank.

10. The method for selecting the type of the equipment of the hydrogen supplying station of the high-pressure tube bundle vehicle as claimed in claim 1, wherein in step S6, the hydrogen pre-cooling system pre-cools by means of heat exchange between brine and hydrogen.

11. The method for selecting the type of the equipment of the hydrogen supplying station of the high-pressure tube bundle vehicle as claimed in claim 8, wherein in the step S6, the temperature of the hydrogen gas after precooling by the hydrogen precooling system is not less than-40 ℃.

12. The high pressure tube bundle vehicle hydrogen supply station equipment sizing method according to claim 1, wherein in step S7, the hydrogenation machine is a single gun hydrogenation machine.

Technical Field

The invention relates to the technical field of hydrogen energy, in particular to a method for selecting a type of equipment of a hydrogen supply station of a high-pressure tube bundle vehicle.

Background

A hydrogen refueling station is an infrastructure for scale-up applications of Fuel Cell Vehicles (FCVs). The hydrogen has the advantages of generating water after combustion without other pollution, various preparation methods, recycling and the like, so that the hydrogen is concerned in all countries in the world in application to the transportation industry. For a hydrogen filling station, two modes of chemical hydrogen production in the station and external hydrogen supply can be roughly divided, and compared with fossil fuels, the supply mode of the hydrogen filling station is diversified. For a hydrogenation station at the initial stage of operation, the hydrogen filling amount is small, and the hydrogen supply by adopting a high-pressure tube bundle vehicle is an economic and reasonable mode for investment and operation of the hydrogenation station.

CN103062619B discloses a motor vehicle hydrogenation station system, which relates to a natural energy power generation device, a hydrogen generator, a hydrogen storage and a hydrogenation device. The patent focuses on the hydrogen station of the water electrolysis hydrogen production process, and simultaneously lacks a selection method of main equipment in the hydrogen station.

CN100534840C discloses a hydrogen production and hydrogenation station system capable of quickly filling hydrogen and a method thereof, which provides a hydrogen supply process route for hydrogen production by water electrolysis and hydrogen production by natural gas reforming, and simultaneously describes the hydrogen filling process in detail, but introduces less equipment information in the hydrogenation station.

At present, the hydrogen supply stations for supplying hydrogen for high-pressure tube bundle vehicles at home and abroad are few in use, so that the related design experience is relatively deficient; the process route of the hydrogen supply station of the high-pressure tube bundle vehicle is complicated, and the technical difficulty is high; the problems of single and inaccurate equipment model selection method and the like exist, so that the design processing capacity of the hydrogenation station is not matched with the operation effect, and the design and construction of the hydrogenation station are limited.

Disclosure of Invention

The invention aims to overcome the defect that the design processing capacity and the operation effect of a high-pressure tube bundle vehicle hydrogen supply hydrogenation station are not matched in the prior art, and provides a method for selecting models of equipment in the high-pressure tube bundle vehicle hydrogen supply hydrogenation station, which can provide a basis for the model selection of equipment in the high-pressure tube bundle vehicle hydrogen supply hydrogenation station and the design construction of the hydrogenation station.

In order to achieve the above object, the present invention provides a method for selecting a type of a high-pressure tube bundle vehicle hydrogen supply and hydrogenation station device, wherein the high-pressure tube bundle vehicle hydrogen supply and hydrogenation station device comprises: the model selection method comprises the following steps of:

s1: determining basic parameters: 1) pressure P of hydrogen carried by high-pressure tube bundle vehicle₀；

2) The purity and impurity content of hydrogen carried by a high-pressure tube bundle vehicle;

3) the daily hydrogenation amount m of the hydrogenation station;

4) judging whether the hydrogenation time is centralized or not, wherein the judging method comprises the following steps:

if the vehicle hydrogenation time is concentrated in a certain fixed time period, the vehicle hydrogenation time is concentrated, and the daily working time T of the hydrogenation station is counted according to 10 hours; otherwise, dispersing, and counting the daily working time of the hydrogenation station by 16 hours;

5) determining the hydrogen adding amount m of a hydrogen supplying and adding station of a high-pressure tube bundle vehicle per hour_TThe calculation formula is as follows:wherein m is the daily hydrogenation amount of the hydrogenation station, and T is the hydrogenation operation time;

6) determining the shutdown sensitivity, wherein if the user is mainly a bus, the shutdown sensitivity is high, otherwise, the shutdown sensitivity is low;

7) filling hydrogen into the pressure grade P;

s2: analyzing the purity and impurity content of the hydrogen carried by the high-pressure tube bundle vehicle, and judging whether a hydrogen purification system is arranged, wherein the judgment method comprises the following steps:

if the purity and the impurity content of the hydrogen carried by the high-pressure tube bundle vehicle simultaneously meet the following conditions: 1) the hydrogen mole fraction is not less than 99.99 percent; 2) the total amount of non-hydrogen gas is not more than 100 mu mol/mol; 3) the total sulfur content is not more than 0.004 mu mol/mol; 4) the CO content is not more than 0.2 mu mol/mol, the hydrogen purity and the impurity content are qualified, and a hydrogen purification system is not required to be added; otherwise, a hydrogen purification system is required to be arranged;

s3: and (3) selecting the type of a hydrogen compressor:

1) determining the displacement and the number of the hydrogen compressors;

when N is less than or equal to 25kW, if the shutdown sensitivity is high, two discharge capacities are selected as V_TThe hydrogen compressor of (1); if the shutdown sensitivity is small, selecting one displacement as V_TThe hydrogen compressor of (1);

when N is more than 25kW and less than or equal to 60kW, if the shutdown sensitivity is high, two discharge capacities are selected as V_TThe hydrogen compressor of (1); if the shutdown sensitivity is small, selecting one displacement as V_TOr two displacement volumes are V_T/2The hydrogen compressor of (1);

when N is more than 60kW, if the shutdown sensitivity is high, three discharge capacities are selected as V_T/2The hydrogen compressor of (1); if the shutdown sensitivity is small, two displacement volumes are selected as V_T/2The hydrogen compressor of (1);

wherein, V_TThe volume of hydrogen compressed in a unit hour,

n is the power of the hydrogen compressor,

ps is the absolute pressure of the inlet air of the hydrogen compressor, and the unit is Pa; p_dThe unit is Pa, and the unit is the absolute pressure of the exhaust gas of the hydrogen compressor; v_TIs the volume of compressed hydrogen in unit hour, m³/s；

2) Determining whether a hydrogen compressor cooling system is set;

according to exhaust temperature T_dIs determined to beAnd if not, setting a hydrogen compressor cooling system:

when exhaust temperature T_dWhen the temperature is lower than 170 ℃, a hydrogen compressor cooling system does not need to be additionally arranged;

when exhaust temperature T_dWhen the temperature is more than or equal to 170 ℃, a hydrogen compressor cooling system needs to be additionally arranged; wherein the content of the first and second substances,

ps is the absolute pressure of the inlet air of the hydrogen compressor, and the unit is Pa; p_dThe unit is Pa, and the unit is the absolute pressure of the exhaust gas of the hydrogen compressor; ts is the inlet gas temperature of the hydrogen compressor, and the unit is;

s4: the pressure grade of the hydrogen storage system and the hydrogen storage amount proportion under each pressure grade are set according to the hydrogen filling pressure grade P, and the method comprises the following steps:

1) if the hydrogen filling pressure grade is 70MPa, setting a low-pressure, medium-pressure and high-pressure three-stage hydrogen storage system, wherein the hydrogen storage quantity ratio of the low-pressure, medium-pressure and high-pressure three-stage hydrogen storage system is 1-3: 1-2: 1;

2) if the hydrogen filling pressure grades are 35MPa and 70MPa, setting a low-pressure, medium-pressure and high-pressure three-stage hydrogen storage system, wherein the hydrogen storage quantity ratio of the low-pressure, medium-pressure and high-pressure three-stage hydrogen storage system is 1-3: 1-2: 1;

3) if the hydrogen filling pressure grade is 35MPa, a low-pressure and medium-pressure two-stage hydrogen storage system is arranged, and the hydrogen storage quantity ratio of the low-pressure and medium-pressure two-stage hydrogen storage system is 1-2: 1;

s5: determining the hydrogen storage system according to the pressure grade of the hydrogen storage system, the hydrogen storage quantity proportion under each pressure grade and the daily hydrogenation quantity m of the hydrogenation station, wherein the method comprises the following steps:

1) if the daily hydrogen adding amount m of the hydrogen adding station is less than or equal to 500kg and the hydrogen adding pressure level is 35MPa, 1 low-pressure hydrogen storage device and 1 medium-pressure hydrogen storage device are arranged;

2) if the daily hydrogen adding amount m of the hydrogen adding station is less than or equal to 500kg and the hydrogen adding pressure level is 70MPa, 1 low-pressure hydrogen storage device, 1 medium-pressure hydrogen storage device and 1 high-pressure hydrogen storage device are arranged;

3) if the daily hydrogen adding amount of the hydrogen adding station is more than or equal to 500kg and less than 1000kg and the hydrogen adding pressure level is 35MPa, 1 low-pressure hydrogen storage device and 2 medium-pressure hydrogen storage devices are arranged;

4) if the daily hydrogen adding amount of the hydrogen adding station is more than or equal to 500kg and less than 1000kg and the hydrogen adding pressure grade is 70MPa, 1 low-pressure hydrogen storage device, 2 medium-pressure hydrogen storage devices and 1 high-pressure hydrogen storage device are arranged;

5) if the daily hydrogen addition of the hydrogen station is more than or equal to 1000kg and less than 2000kg, 2 low-pressure hydrogen storage devices, 3 medium-pressure hydrogen storage devices and 2 high-pressure hydrogen storage devices are arranged according to the design that the hydrogen filling pressure grade is 70 MPa;

s6: according to the hydrogen filling pressure grade, whether a hydrogen precooling system is set is determined, and the method comprises the following steps:

1) when the hydrogen filling pressure grade of the hydrogen station is 35MPa, a hydrogen precooling system is not arranged;

2) and when the hydrogen filling pressure grade of the hydrogen station is 70MPa, a hydrogen precooling system is arranged.

S7: determining the number of hydrogenators

In the formula (2)]For the operator of taking integer upwards, m₁Adding hydrogen with the hydrogen adding amount m under the pressure grade P of 35MPa₂Adding the hydrogen amount with the pressure grade P of 70MPa into the hydrogen, and calculating to obtain a numerical value which is the number of the hydrogenation machines.

Preferably, in step S1, the daily hydrogenation amount m of the hydrogenation station is determined by one of the following two methods:

a) the value m is directly given;

b) calculating by the type and number of hydrogenation vehicles:

m＝5×N₁+20×N₃+15×N₃+m₄；

wherein N1 is the number of taxies, N2 is the number of buses, N3 is the number of passenger vehicles, and m4 is the number of hydrogen used by other vehicles.

Preferably, in step S2, the hydrogen purification system uses a pressure swing adsorption hydrogen separation device.

Under the preferable conditions, the device for separating hydrogen by pressure swing adsorption comprises 5 adsorption towers, wherein 1 adsorption tower is always in an adsorption state.

Preferably, in step S3, the hydrogen compressor cooling system includes at least one selected from the group consisting of an air cooling system, a water cooling system, and a coolant cooling system.

Preferably, in step S4, when the hydrogen filling pressure level is 70MPa, the hydrogen storage system comprises: the high-pressure tube bundle vehicle is used as low-pressure hydrogen storage equipment, and the design pressure of hydrogen storage is P₀(ii) a The design pressure of hydrogen storage of the medium-pressure hydrogen storage tank is 45 MPa; the hydrogen storage design pressure of the high-pressure hydrogen storage tank is 87.5 MPa.

Preferably, in step S4, when the hydrogen filling pressure levels are 35MPa and 70MPa, the hydrogen storage system comprises: the high-pressure tube bundle vehicle is used as low-pressure hydrogen storage equipment, and the design pressure of hydrogen storage is P₀(ii) a The design pressure of hydrogen storage of the medium-pressure hydrogen storage tank is 45 MPa; the hydrogen storage design pressure of the high-pressure hydrogen storage tank is 87.5 MPa.

Under the preferable condition, in step S4, when the hydrogen filling pressure level is 35MPa, in the low-pressure and medium-pressure two-stage hydrogen storage system, a high-pressure tube bundle vehicle is used as a low-pressure hydrogen storage device, and the design pressure of hydrogen storage is P₀(ii) a The design pressure of hydrogen storage of the medium-pressure hydrogen storage tank is 45 MPa.

Preferably, in step S5, the low-pressure hydrogen storage facility is a high-pressure tube bundle vehicle with a hydrogen storage design pressure P₀The maximum hydrogen storage capacity is 350 kg/vehicle; the medium-pressure hydrogen storage equipment has a volume of 5m³The hydrogen storage tank has a hydrogen storage design pressure of 45MPa and a maximum hydrogen storage capacity of 145kg per tank; the high-pressure hydrogen storage equipment has a volume of 5m³The designed pressure of hydrogen storage of the hydrogen storage tank is 87.5MPa, and the maximum hydrogen storage capacity is 235kg per tank.

Under the preferable condition, in step S6, the hydrogen pre-cooling system pre-cools by using a brine and hydrogen heat exchange manner.

Under the preferable condition, in step S6, the temperature of the hydrogen after precooling by the hydrogen precooling system is not less than-40 ℃.

Preferably, in step S7, the hydrogenation machine is a single-gun hydrogenation machine

Through the technical scheme, the invention has the following technical effects:

the invention provides a model selection method of main equipment in a station aiming at a typical universal hydrogen station process of a high-pressure tube bundle vehicle hydrogen supply hydrogen station, establishes a model selection method combining formula calculation and factory requirements, and is suitable for main equipment in the hydrogen station: the hydrogen purification system, the number and the power of the hydrogen compressors, the model selection of the hydrogen storage system, the hydrogen precooling system, the hydrogenation machine and other systems provide a basis for the model selection of equipment in the hydrogen supply and hydrogenation station of the high-pressure tube bundle vehicle and the design and construction of the hydrogenation station.

Detailed Description

The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.

The high-pressure tube bundle vehicle hydrogen supply and hydrogenation station is suitable for a hydrogenation station with daily hydrogenation amount less than 2000kg, so the model selection method of the high-pressure tube bundle vehicle hydrogen supply and hydrogenation station equipment provided by the invention is also used for performing model selection on a hydrogenation station with daily hydrogenation amount less than 2000 kg.

The invention provides a method for selecting models of equipment of a high-pressure tube bundle vehicle hydrogen supply and hydrogenation station, which comprises the following steps: the model selection method comprises the following steps of:

s1: determining basic parameters: 1) pressure P of hydrogen carried by high-pressure tube bundle vehicle₀；

2) The purity and impurity content of hydrogen carried by a high-pressure tube bundle vehicle;

3) the daily hydrogenation amount m of the hydrogenation station; the daily average hydrogenation amount m of a proposed hydrogenation station is determined through engineering requirements and field investigation, and the daily hydrogenation amount m of the hydrogenation station can be determined by the following two methods: a) the value m is directly given;

b) calculating by the type and number of hydrogenation vehicles:

m＝5×N₁+20×N₂+15×N₃+m₄；

wherein N1 is the number of taxies, N2 is the number of buses, N3 is the number of passenger vehicles, and m4 is the number of hydrogen used by other vehicles.

4) Judging whether the hydrogenation time is centralized or not, wherein the judging method comprises the following steps:

if the vehicle hydrogenation time is concentrated in a certain fixed time period, the vehicle hydrogenation time is concentrated, and the daily working time T of the hydrogenation station is counted according to 10 hours; otherwise, dispersing, and counting the daily working time of the hydrogenation station by 16 hours;

5) determining the hydrogen adding amount m of the hydrogen adding station per hour_TThe calculation formula is as follows:wherein m is the daily hydrogenation amount of the hydrogenation station, and T is the hydrogenation operation time;

6) determining the shutdown sensitivity, wherein if the user is mainly a bus, the shutdown sensitivity is high, otherwise, the shutdown sensitivity is low;

7) filling hydrogen into the pressure grade P;

s2: analyzing the purity and impurity content of the hydrogen carried by the high-pressure tube bundle vehicle, and judging whether a hydrogen purification system is arranged, wherein the judgment method comprises the following steps:

if the purity and the impurity content of the hydrogen carried by the high-pressure tube bundle vehicle simultaneously meet the following conditions: 1) the hydrogen mole fraction is not less than 99.99 percent; 2) the total amount of non-hydrogen gas is not more than 100 mu mol/mol; 3) the total sulfur content is not more than 0.004 mu mol/mol; 4) the CO content is not more than 0.2 mu mol/mol, the hydrogen purity and the impurity content are qualified, and a hydrogen purification system is not required to be added; otherwise, a hydrogen purification system is required to be arranged; the hydrogen purification system adopts a Pressure Swing Adsorption (PSA) hydrogen separation device, can adopt a 5-1-3 process, namely 5 adsorption towers are selected, and 1 adsorption tower is always in an adsorption state.

The treatment capacity of the adsorption tower is obtained by calculating the volume of purified hydrogen in unit hour, and the volume V of hydrogen in unit hour₀(unit: m)³The calculation formula/h) is as follows:

s3: and (3) selecting the type of a hydrogen compressor:

1) determining the displacement and the number of the hydrogen compressors;

when N is less than or equal to 25kW, if the shutdown sensitivity is high, two discharge capacities are selected as V_TThe hydrogen compressor of (1); if the shutdown sensitivity is small, selecting one displacement as V_TThe hydrogen compressor of (1);

when N is more than 25kW and less than or equal to 60kW, if the shutdown sensitivity is high, two discharge capacities are selected as V_TThe hydrogen compressor of (1); if the shutdown sensitivity is small, selecting one displacement as V_TOr two displacement volumes are V_T/2The hydrogen compressor of (1);

when N is more than 60kW, if the shutdown sensitivity is high, three discharge capacities are selected as V_T/2The hydrogen compressor of (1); if the shutdown sensitivity is small, two displacement volumes are selected as V_T/2The hydrogen compressor of (1);

wherein, V_TThe volume of hydrogen compressed in a unit hour,

n is the power of the hydrogen compressor,

ps is the absolute pressure of the inlet air of the hydrogen compressor, and the unit is Pa; p_dThe unit is Pa, and the unit is the absolute pressure of the exhaust gas of the hydrogen compressor; v_TIs the volume of compressed hydrogen in unit hour, m³/s；

2) Determining whether a hydrogen compressor cooling system is set;

according to exhaust temperature T_dDetermining whether a hydrogen compressor cooling system is set:

when exhaust temperature T_dWhen the temperature is lower than 170 ℃, a hydrogen compressor cooling system does not need to be additionally arranged;

when exhaust temperature T_dWhen the temperature is more than or equal to 170 ℃, a hydrogen compressor cooling system needs to be additionally arranged; wherein the content of the first and second substances,

ps is the absolute pressure of the inlet air of the hydrogen compressor, and the unit is Pa; p_dThe unit is Pa, and the unit is the absolute pressure of the exhaust gas of the hydrogen compressor; ts is the inlet gas temperature of the hydrogen compressor, and the unit is;

in the invention, the hydrogen compressor cooling system comprises at least one selected from an air cooling system, a water cooling system and a cooling liquid cooling system, the invention has no special requirement on the specific type of the hydrogen compressor cooling system, and the interstage and final exhaust temperature can meet the requirement.

S4: the pressure grade of the hydrogen storage system and the hydrogen storage amount proportion under each pressure grade are set according to the hydrogen filling pressure grade P, and the method comprises the following steps:

1) if the hydrogen filling pressure grade is 70MPa, setting a low-pressure, medium-pressure and high-pressure three-stage hydrogen storage system, wherein the hydrogen storage quantity ratio of the low-pressure, medium-pressure and high-pressure three-stage hydrogen storage system is 1-3: 1-2: 1; in the low-pressure, medium-pressure and high-pressure three-stage hydrogen storage system: the high-pressure tube bundle vehicle is used as low-pressure hydrogen storage equipment, and the design pressure of hydrogen storage is P₀(ii) a The design pressure of hydrogen storage of the medium-pressure hydrogen storage tank is 45 MPa; the hydrogen storage design pressure of the high-pressure hydrogen storage tank is 87.5 MPa;

2) if the hydrogen filling pressure grades are 35MPa and 70MPa, setting a low-pressure, medium-pressure and high-pressure three-stage hydrogen storage system, wherein the hydrogen storage quantity ratio of the low-pressure, medium-pressure and high-pressure three-stage hydrogen storage system is 1-3: 1-2: 1; in the low-pressure, medium-pressure, high-pressure three-stage hydrogen storage system: the high-pressure tube bundle vehicle is used as low-pressure hydrogen storage equipment, and the design pressure of hydrogen storage is P₀(ii) a The design pressure of hydrogen storage of the medium-pressure hydrogen storage tank is 45 MPa; the hydrogen storage design pressure of the high-pressure hydrogen storage tank is 87.5 MPa;

3) if the hydrogen filling pressure grade is 35MPa, a low-pressure and medium-pressure two-stage hydrogen storage system is arranged, and the hydrogen storage quantity ratio of the low-pressure and medium-pressure two-stage hydrogen storage system is 1-2: 1; in the low-pressure and medium-pressure two-stage hydrogen storage system, a high-pressure tube bundle vehicle is used as low-pressure hydrogen storage equipment, and the design pressure of hydrogen storage is P₀(ii) a The design pressure of hydrogen storage of the medium-pressure hydrogen storage tank is 45 MPa;

in the invention, the design pressure of hydrogen storage is the highest hydrogen storage pressure of the hydrogen storage equipment (high-pressure tube bundle vehicle, medium-pressure hydrogen storage tank or high-pressure hydrogen storage tank), namely the actual hydrogen storage pressure of the hydrogen storage equipment is less than or equal to the design pressure.

S5: determining the hydrogen storage system according to the pressure grade of the hydrogen storage system, the hydrogen storage quantity proportion under each pressure grade and the daily hydrogenation quantity m of the hydrogenation station, wherein the method comprises the following steps:

1) if the daily hydrogen adding amount m of the hydrogen adding station is less than or equal to 500kg and the hydrogen adding pressure level is 35MPa, 1 low-pressure hydrogen storage device and 1 medium-pressure hydrogen storage device are arranged;

2) if the daily hydrogen adding amount m of the hydrogen adding station is less than or equal to 500kg and the hydrogen adding pressure level is 70MPa, 1 low-pressure hydrogen storage device, 1 medium-pressure hydrogen storage device and 1 high-pressure hydrogen storage device are arranged;

3) if the daily hydrogen adding amount of the hydrogen adding station is more than or equal to 500kg and less than 1000kg and the hydrogen adding pressure level is 35MPa, 1 low-pressure hydrogen storage device and 2 medium-pressure hydrogen storage devices are arranged;

4) if the daily hydrogen adding amount of the hydrogen adding station is more than or equal to 500kg and less than 1000kg and the filling pressure grade is 70MPa, 1 low-pressure hydrogen storage device, 2 medium-pressure hydrogen storage devices and 1 high-pressure hydrogen storage device are arranged;

5) if the daily hydrogen addition of the hydrogen station is more than or equal to 1000kg and less than 2000kg, 2 low-pressure hydrogen storage devices, 3 medium-pressure hydrogen storage devices and 2 high-pressure hydrogen storage devices are arranged according to the design that the hydrogen filling pressure grade is 70 MPa;

in the invention, the low-pressure hydrogen storage equipment is a high-pressure tube bundle vehicle, and the hydrogen storage design pressure of the low-pressure hydrogen storage equipment is P₀The maximum hydrogen storage capacity is 350 kg/vehicle; the medium-pressure hydrogen storage equipment has a volume of 5m³The hydrogen storage tank has a hydrogen storage design pressure of 45MPa and a maximum hydrogen storage capacity of 145kg per tank; the high-pressure hydrogen storage equipment has a volume of 5m³The designed pressure of hydrogen storage of the hydrogen storage tank is 87.5MPa, and the maximum hydrogen storage capacity is 235kg per tank.

S6: according to the hydrogen filling pressure grade, whether a hydrogen precooling system is set is determined, and the method comprises the following steps:

1) when the hydrogen filling pressure grade of the hydrogen station is 35MPa, a hydrogen precooling system is not arranged;

2) when the hydrogen filling pressure grade of the hydrogen station is 70MPa, a hydrogen precooling system is arranged;

for hydrogen filling, due to the inverse soup-coke effect, the conversion of hydrogen kinetic energy to internal energy and the like, a hydrogen precooling system is required to be adopted when the hydrogen filling pressure grade of the hydrogen station is 70MPa, and the hydrogen precooling system is selected when the hydrogen filling pressure grade of the hydrogen station is 35 MPa.

Under the preferable condition, the hydrogen precooling system precools in a brine and hydrogen heat exchange mode, and the temperature of hydrogen precooled by the hydrogen precooling system is not less than-40 ℃.

S7: determining the number of hydrogenators

In the formula (2)]For the operator of taking integer upwards, m₁Adding hydrogen with the hydrogen adding amount m under the pressure grade P of 35MPa₂Adding the hydrogen amount with the pressure grade P of 70MPa into the hydrogen, and calculating to obtain a numerical value which is the number of the hydrogenation machines.

Under the preferred condition, the invention adopts a single-gun hydrogenation machine.

The present invention will be described in detail below with reference to examples.

Example 1

A hydrogen filling pressure grade P of a hydrogen station planned to be built in a certain city is 35MPa, the daily hydrogen filling amount is 500 kg/day, the hydrogen filling time is centralized, and the main service object is a bus.

According to the planning conditions, the model selection implementation mode of the high-pressure tube bundle vehicle hydrogen supply and hydrogenation station equipment is as follows:

first, input condition

(1) Hydrogen pressure P for transporting high-pressure tube bundle vehicle₀＝20MPa；

(2) The hydrogen is purchased externally, and the quality meets the standard of the hydrogen used by the fuel cell, so a hydrogen purification system is not required to be arranged in the hydrogen station;

(3) the daily designed hydrogenation amount of the hydrogenation station is 500 kg;

(4) the hydrogen filling time of the hydrogen filling station is centralized, and T is 10 h;

(5) determining the hydrogen adding amount m of the hydrogen adding station per hour_TThe calculation formula is as follows:substituting into formula to obtain m_T＝50kg/h；

(6) The shutdown sensitivity of the hydrogenation station is high;

(7) the hydrogen filling pressure grade P is 35 MPa.

Secondly, as the hydrogen is purchased externally and the quality meets the standard of the hydrogen used by the fuel cell, a hydrogen purification system is not required to be arranged in the hydrogen station;

third, hydrogen compressor calculation

1) Determining the displacement and the number of the hydrogen compressors;

hydrogen compression V per hour_T＝m_T/7.5＝6.7m³/h＝0.00186m³/s；

Compressor shaft power

Wherein the absolute pressure of the inlet air is Ps 101 multiplied by 10⁵Pa; absolute pressure of gas outlet of P_d＝451×10⁵Pa，

N is less than or equal to 25kW, and the shutdown sensitivity is high, so that two sets of exhaust gas are selected, and the exhaust gas is not less than 6.7m³A hydrogen compressor of/h;

2) determining whether a hydrogen compressor cooling system is set;

calculating the inlet temperature Ts of the hydrogen compressor to be 30 ℃ to obtain the exhaust temperature T_d46.3 ℃, and the exhaust temperature is not higher than 170 ℃, so an exhaust cooling system is not required to be additionally arranged;

fourthly, setting the pressure systems of the hydrogen storage system and the hydrogen storage quantity proportion of each level of pressure system according to the hydrogen filling pressure grade P

The hydrogen filling pressure grade is 35MPa, a medium-pressure and low-pressure two-stage hydrogen storage system is arranged, the high-pressure tube bundle vehicle is a low-pressure hydrogen storage system, and the pressure P is₀20 MPa; the design pressure of the medium-pressure hydrogen storage tank is 45 MPa.

When the daily hydrogen adding amount m of the hydrogen adding station is 500kg and the pressure grade of the hydrogen storage system is 35MPa, the number n of the high-pressure tube bundle vehicles is 1, and each high-pressure tube bundle vehicle is used as low-pressure hydrogen storage equipment, and the hydrogen storage capacity of each high-pressure tube bundle vehicle is 350 kg; the water volume of the medium-pressure hydrogen storage equipment is 5m³The hydrogen storage tank of (1) has a single-tank hydrogen storage capacity of 145kg and a design pressure of 45MPa, and the total hydrogen storage capacity is 350kg +145 kg-495 kg under the conditions.

Four, hydrogen precooling system facility

The hydrogen filling pressure grade is 35MPa, and a hydrogen precooling system is not required to be designed.

Fifthly, model selection of hydrogenation equipment

The hydrogen filling pressure level is 35MPa, the daily filling amount is 500kg, and the number of the hydrotreaters is calculated to be 3 [500/200 ].

The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.