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Исследование тепломассообменных процессов в адсорбционных системах аккумулирования методами эмпирического и математического моделирования
Конференции
The model of adsorption/desorption process on nanoporous carbon materials under the thermal insulation conditions
Shkolin A.V., Strizhenov E.M., Men'shchikov I.E., Chugaev S.S.
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Shkolin A.V., Strizhenov E.M., Men'shchikov I.E., Chugaev S.S.
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Experimental study of heat transfer in adsorbed natural gas storage system filled with microporus monolithic active carbon
Sergey Chugaev, Evgeny Strizhenov, Ilya Men'shchikov, Andrey Shkolin, Igor Shelyakin
Experimental study of the thermal management process at low-temperature circulating charging of an adsorbed natural gas storage system
Sergey Chugaev, Evgeny Strizhenov, Ilya Men'shchikov, Andrey Shkolin
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Sergey Chugaev, Evgeny Strizhenov, Ilya Men'shchikov, Andrey Shkolin, Igor Shelyakin
Experimental study of the thermal management process at low-temperature circulating charging of an adsorbed natural gas storage system
Sergey Chugaev, Evgeny Strizhenov, Ilya Men'shchikov, Andrey Shkolin
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Эксперементальное исследование процесса терморегуляции при циркуляционной заправке адсорбционного аккумулятора природного газа
Чугаев С.С., Стриженов Е.М., Школин А.В., Меньщиков И.Е.
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Чугаев С.С., Стриженов Е.М., Школин А.В., Меньщиков И.Е.
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Углеродные нанопористые адсорбционные монолиты для терморегулируемой системы аккумулирования природного газа
Чугаев С.С., Стриженов Е.М., Школин А.В., Меньщиков И.Е.
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Чугаев С.С., Стриженов Е.М., Школин А.В., Меньщиков И.Е.
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Углеродные Тепломассообмен в резервуаре-накопителе адсорбированного природного газа с монолитным нанопористым активным углем
Чугаев С.С., Стриженов Е.М., Шелякин И.Д., Школин А.В., Меньщиков И.Е.
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Чугаев С.С., Стриженов Е.М., Шелякин И.Д., Школин А.В., Меньщиков И.Е.
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Теплообмен в системе хранения адсорбированногои природного газа с монолитным углеродным адсорбентом при охлаждаемой циркуляционной заправке
Чугаев С.С., Стриженов Е.М., Школин А.В., Меньщиков И.Е.
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Чугаев С.С., Стриженов Е.М., Школин А.В., Меньщиков И.Е.
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ПУБЛИКАЦИИ
Abstract
The present work focused on the experimental study of the performance of a scaled system of adsorbed natural gas (ANG) storage and transportation based on carbon adsorbents. For this purpose, three different samples of activated carbons (AC) were prepared by varying the size of coconut shell char granules and steam activation conditions. The parameters of their porous structure, morphology, and chemical composition were determined from the nitrogen adsorption at 77 K, X-ray diffraction (XRD), small-angle X-ray scattering (SAXS), and scanning electron microscopy (SEM) measurements. The methane adsorption data measured within the temperature range from 178 to 360 K and at pressures up to 25 MPa enabled us to identify the most efficient adsorbent among the studied materials: AC-90S. The differential heats of methane adsorption on AC-90S were determined in order to simulate the gas charge/discharge processes in the ANG system using a mathematical model with consideration for thermal effects. The results of simulating the charge/discharge processes under two different conditions of heat exchange are consistent with the experimentally determined temperature distribution over a scaled ANG storage tank filled with the compacted AC-90S adsorbent and equipped with temperature sensors and heat-exchanger devices. The amounts of methane delivered from the ANG storage system employing AC-90S as an adsorbent differ from the model predictions by 4–6%. Both the experiments and mathematical modeling showed that the thermal regulation of the ANG storage tank ensured the higher rates of charge/discharge processes compared to the thermal insulation.
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The present work focused on the experimental study of the performance of a scaled system of adsorbed natural gas (ANG) storage and transportation based on carbon adsorbents. For this purpose, three different samples of activated carbons (AC) were prepared by varying the size of coconut shell char granules and steam activation conditions. The parameters of their porous structure, morphology, and chemical composition were determined from the nitrogen adsorption at 77 K, X-ray diffraction (XRD), small-angle X-ray scattering (SAXS), and scanning electron microscopy (SEM) measurements. The methane adsorption data measured within the temperature range from 178 to 360 K and at pressures up to 25 MPa enabled us to identify the most efficient adsorbent among the studied materials: AC-90S. The differential heats of methane adsorption on AC-90S were determined in order to simulate the gas charge/discharge processes in the ANG system using a mathematical model with consideration for thermal effects. The results of simulating the charge/discharge processes under two different conditions of heat exchange are consistent with the experimentally determined temperature distribution over a scaled ANG storage tank filled with the compacted AC-90S adsorbent and equipped with temperature sensors and heat-exchanger devices. The amounts of methane delivered from the ANG storage system employing AC-90S as an adsorbent differ from the model predictions by 4–6%. Both the experiments and mathematical modeling showed that the thermal regulation of the ANG storage tank ensured the higher rates of charge/discharge processes compared to the thermal insulation.
Read full-text
Abstract
Adsorbed natural gas (ANG) technology is a promising alternative to traditional compressed (CNG) and liquefied (LNG) natural gas systems. Nevertheless, energy efficiency and storage capacity of ANG system strongly depends on thermal management of its inner volume because of significant heat effects occurring during adsorption/desorption processes. In present work, a prototype of circulating charging system for ANG storage tank filled with monolithic microporous carbon adsorbent was studied experimentally under isobaric conditions (0.5-3.5 MPa) at constant volumetric flow rate (8-18 m3/h) or flow mode (Reynolds number at the adsorber inlet from 100 000 to 220 000). The study of the thermal state of the monolithic adsorbent layer and internal heat exchange processes during the circulating charging of an adsorbed natural gas storage system was carried out. The correlation between gas flow mode, dynamic gas flow temperature and the heat
transfer coefficient between gas and adsorbent is determined. A one-dimensional mathematical model of the circulating low-temperature charging process has been developed, the results of which correspond to the experimental measurements.
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Adsorbed natural gas (ANG) technology is a promising alternative to traditional compressed (CNG) and liquefied (LNG) natural gas systems. Nevertheless, energy efficiency and storage capacity of ANG system strongly depends on thermal management of its inner volume because of significant heat effects occurring during adsorption/desorption processes. In present work, a prototype of circulating charging system for ANG storage tank filled with monolithic microporous carbon adsorbent was studied experimentally under isobaric conditions (0.5-3.5 MPa) at constant volumetric flow rate (8-18 m3/h) or flow mode (Reynolds number at the adsorber inlet from 100 000 to 220 000). The study of the thermal state of the monolithic adsorbent layer and internal heat exchange processes during the circulating charging of an adsorbed natural gas storage system was carried out. The correlation between gas flow mode, dynamic gas flow temperature and the heat
transfer coefficient between gas and adsorbent is determined. A one-dimensional mathematical model of the circulating low-temperature charging process has been developed, the results of which correspond to the experimental measurements.
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Abstract
The study of the thermal state of the monolithic adsorbent layer and internal heat exchange processes during the circulating charging of an adsorbed natural gas storage system was carried out. The correlation between gas flow mode and the heat
transfer coefficient between gas and adsorbent is determined under conditions of mass transfer.
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The study of the thermal state of the monolithic adsorbent layer and internal heat exchange processes during the circulating charging of an adsorbed natural gas storage system was carried out. The correlation between gas flow mode and the heat
transfer coefficient between gas and adsorbent is determined under conditions of mass transfer.
Read full-text
Abstract
Adsorbed natural gas (ANG) technology is a promising alternative to traditional compressed (CNG) and liquefied (LNG) natural gas systems. Nevertheless, energy efficiency and storage capacity of ANG system strongly depends on thermal
management of its inner volume because of significant heat effects occurring during adsorption/desorption processes. At the same time low-temperature charging of ANG system provides its higher storage capacity as well as increased fire and explosion
safety due to lower operating pressure and "bound-state" of gas molecules with the surface of adsorbent. In present work, a prototype of low-temperature circulating charging system for ANG storage tank filled with shaped microporous carbon
adsorbent was studied experimentally in wide ranges of pressures (0.5-3.5 MPa) and gas flow rates (8-18 m3/h).
Read full-text
Adsorbed natural gas (ANG) technology is a promising alternative to traditional compressed (CNG) and liquefied (LNG) natural gas systems. Nevertheless, energy efficiency and storage capacity of ANG system strongly depends on thermal
management of its inner volume because of significant heat effects occurring during adsorption/desorption processes. At the same time low-temperature charging of ANG system provides its higher storage capacity as well as increased fire and explosion
safety due to lower operating pressure and "bound-state" of gas molecules with the surface of adsorbent. In present work, a prototype of low-temperature circulating charging system for ANG storage tank filled with shaped microporous carbon
adsorbent was studied experimentally in wide ranges of pressures (0.5-3.5 MPa) and gas flow rates (8-18 m3/h).
Read full-text
Abstract
Adsorbed natural gas (ANG) technology is a promising safe and energy saving alternative to traditional compressed natural gas (CNG) and liquefed natural gas (LNG) storage systems. One of the key disadvantages to the use of ANG is the thermal efects of adsorption and desorption, leading to signifcant temperature changing in the adsorption layer and losses in the storage capacity. In this work, a study of heat and mass transfer processes in an ANG storage tank equipped with adsorbent monoliths, internal and external heat exchangers was carried out using the method of mathematical modeling in the ANSYS Fluent software package. A modeling method is presented using the "enthalpy approach" to describe thermodynamic processes in the adsorption layer. The presented mathematical method adequately describes the processes of heat and mass transfer in the adsorber. Forced thermal management reduced the duration of gas charging (by 2.5 times) and gas discharging (by 1.6 times) with fnal diference between the average temperature of the adsorbent and the ambient temperature of 15 K and also reduced gas capacity losses due to thermal efects by about 1.4 times in a shortcut charge–discharge cycle.
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Adsorbed natural gas (ANG) technology is a promising safe and energy saving alternative to traditional compressed natural gas (CNG) and liquefed natural gas (LNG) storage systems. One of the key disadvantages to the use of ANG is the thermal efects of adsorption and desorption, leading to signifcant temperature changing in the adsorption layer and losses in the storage capacity. In this work, a study of heat and mass transfer processes in an ANG storage tank equipped with adsorbent monoliths, internal and external heat exchangers was carried out using the method of mathematical modeling in the ANSYS Fluent software package. A modeling method is presented using the "enthalpy approach" to describe thermodynamic processes in the adsorption layer. The presented mathematical method adequately describes the processes of heat and mass transfer in the adsorber. Forced thermal management reduced the duration of gas charging (by 2.5 times) and gas discharging (by 1.6 times) with fnal diference between the average temperature of the adsorbent and the ambient temperature of 15 K and also reduced gas capacity losses due to thermal efects by about 1.4 times in a shortcut charge–discharge cycle.
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Abstract
The structure and properties of an AU-6 microporous carbon adsorbent synthesized from organic carbon-containing raw materials are studied. We show that monoblocks of this adsorbent can be effectively used to accumulate natural gas under arctic conditions. The filling and discharge of gas from the adsorber filled with AU-6 monoblocks are simulated mathematically.
The structure and properties of an AU-6 microporous carbon adsorbent synthesized from organic carbon-containing raw materials are studied. We show that monoblocks of this adsorbent can be effectively used to accumulate natural gas under arctic conditions. The filling and discharge of gas from the adsorber filled with AU-6 monoblocks are simulated mathematically.
Abstract
Adsorbed natural gas (ANG) systems are a promising alternative to the high-pressure compressed natural gas and low-temperature liquefied natural gas. ANG systems accumulate methane with lower energy consumption and an increased fire and explosion safety due to the gas-bound state in the pores. However, the charging process is complicated due to the thermal effects of adsorption, which reduce the method's energy efficiency, thus needing an additional thermal control. A study of the duration of low-temperature circulation charging of an elementary adsorption cell of various geometries was conducted under different temperature and pressure modes. The charging completion criterion was achieving 95% limit value of the amount of accumulated methane, which was constant for all considered cases. As a result of modeling, a reduction in the duration of gas accumulation was observed with an increase in the operating pressure. It has been established that the charging time is significantly affected by the gas channel opening diameter, required to reduce the hydraulic resistance of the adsorbent layer as when the channel diameter increased from 4 to 6 mm, the charging time decreased by 138 s or 25% on an average. A twofold smaller effect of ~13% was registered with an increase in the diameter from 2 to 4 mm due to the changing cooling nature.
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Adsorbed natural gas (ANG) systems are a promising alternative to the high-pressure compressed natural gas and low-temperature liquefied natural gas. ANG systems accumulate methane with lower energy consumption and an increased fire and explosion safety due to the gas-bound state in the pores. However, the charging process is complicated due to the thermal effects of adsorption, which reduce the method's energy efficiency, thus needing an additional thermal control. A study of the duration of low-temperature circulation charging of an elementary adsorption cell of various geometries was conducted under different temperature and pressure modes. The charging completion criterion was achieving 95% limit value of the amount of accumulated methane, which was constant for all considered cases. As a result of modeling, a reduction in the duration of gas accumulation was observed with an increase in the operating pressure. It has been established that the charging time is significantly affected by the gas channel opening diameter, required to reduce the hydraulic resistance of the adsorbent layer as when the channel diameter increased from 4 to 6 mm, the charging time decreased by 138 s or 25% on an average. A twofold smaller effect of ~13% was registered with an increase in the diameter from 2 to 4 mm due to the changing cooling nature.
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Abstract
Adsorbed natural gas (ANG) is a promising solution for improving the safety and storage capacity of low-pressure gas storage systems. The structural–energetic and adsorption properties of active carbon ACPK, synthesized from cheap peat raw materials, are presented. Calculations of the methane–ethane mixture adsorption on ACPK were performed using the experimental adsorption isotherms of pure components. It is shown that the accumulation of ethane can significantly increase the energy capacity of the ANG storage. Numerical molecular modeling of the methane–ethane mixture adsorption in slit-like model micropores has been carried out. The molecular effects associated with the displacement of ethane by methane molecules and the formation of a molecule layered structure are shown. The integral molecular adsorption isotherm of the mixture according to the molecular modeling adequately corresponds to the ideal adsorbed solution theory (IAST). The cyclic processes of gas charging and discharging from the ANG storage based on the ACPK are simulated in three modes: adiabatic, isothermal, and thermocontrolled. The adiabatic mode leads to a loss of 27–33% of energy capacity at 3.5 MPa compared to the isothermal mode, which has a 9.4–19.5% lower energy capacity compared to the thermocontrolled mode, with more efficient desorption of both methane and ethane.
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Adsorbed natural gas (ANG) is a promising solution for improving the safety and storage capacity of low-pressure gas storage systems. The structural–energetic and adsorption properties of active carbon ACPK, synthesized from cheap peat raw materials, are presented. Calculations of the methane–ethane mixture adsorption on ACPK were performed using the experimental adsorption isotherms of pure components. It is shown that the accumulation of ethane can significantly increase the energy capacity of the ANG storage. Numerical molecular modeling of the methane–ethane mixture adsorption in slit-like model micropores has been carried out. The molecular effects associated with the displacement of ethane by methane molecules and the formation of a molecule layered structure are shown. The integral molecular adsorption isotherm of the mixture according to the molecular modeling adequately corresponds to the ideal adsorbed solution theory (IAST). The cyclic processes of gas charging and discharging from the ANG storage based on the ACPK are simulated in three modes: adiabatic, isothermal, and thermocontrolled. The adiabatic mode leads to a loss of 27–33% of energy capacity at 3.5 MPa compared to the isothermal mode, which has a 9.4–19.5% lower energy capacity compared to the thermocontrolled mode, with more efficient desorption of both methane and ethane.
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Abstract
Adsorbed natural gas (ANG) storage is a promising solution to the problem of uneven supply and consumption of natural gas. ANG storages are relatively simple, safe and do not require complex infrastructure. The paper investigates the properties of activated carbon of wood origin synthesized by the method of chemical activation, as well as the theoretical capacity and thermodynamic properties of ANG storage facilities equipped with this adsorbent. An original graphical method for calculating the parameters and processes of ANG storage facilities is presented using the example of synthesized active carbon.
Various types of ANG storage charging are considered: adiabatic processes of charging with compressed and liquefied gas, isothermal and pseudo-isothermal processes. So adiabatic charging with liquefied gas allows reaching a storage capacity of 150 m3/m3 at a pressure of 3.5 MPa. A number of recommendations were made regarding the choice of the charging type from the standpoint of the ANG storage facility design.
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Adsorbed natural gas (ANG) storage is a promising solution to the problem of uneven supply and consumption of natural gas. ANG storages are relatively simple, safe and do not require complex infrastructure. The paper investigates the properties of activated carbon of wood origin synthesized by the method of chemical activation, as well as the theoretical capacity and thermodynamic properties of ANG storage facilities equipped with this adsorbent. An original graphical method for calculating the parameters and processes of ANG storage facilities is presented using the example of synthesized active carbon.
Various types of ANG storage charging are considered: adiabatic processes of charging with compressed and liquefied gas, isothermal and pseudo-isothermal processes. So adiabatic charging with liquefied gas allows reaching a storage capacity of 150 m3/m3 at a pressure of 3.5 MPa. A number of recommendations were made regarding the choice of the charging type from the standpoint of the ANG storage facility design.
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КОЛЛЕКТИВ
- Андрей Вячеславович
Школин - Евгений Михайлович СтриженовРоль в проекте: основной исполнитель, разработка математических моделей, обработка экспериментальных данных
Узнать больше - Сергей Сергеевич
Чугаев - Анатолий Анатольевич
Жердев - Николай Алексеевич
ЛавровРоль в проекте: научный консультант
Узнать больше - Илья Евгеньевич
Меньщиков - Игорь Дмитриевич
ШелякинРоль в проекте: математическое моделирование процессов адсорбции в программном комплексе ANSYS Fluent
Узнать больше
Андрей Вячеславович Школин
Роль в проекте: руководитель, проведение экспериментальных исследований
Ведущий инженер, МГТУ им. Н.Э. Баумана
Кандидат химических наук
IstinaResearcherID (IRID): 92358640
WoS ResearcherID: C-7919-2016
Scopus Author ID: 19639552900
ORCID: 0000-0001-6446-4419
Ведущий инженер, МГТУ им. Н.Э. Баумана
Кандидат химических наук
IstinaResearcherID (IRID): 92358640
WoS ResearcherID: C-7919-2016
Scopus Author ID: 19639552900
ORCID: 0000-0001-6446-4419
Евгений Михайлович Стриженов
Роль в проекте: основной исполнитель, разработка математических моделей, обработка экспериментальных данных
Ведущий инженер, МГТУ им. Н.Э. Баумана
Кандидат технических наук
IstinaResearcherID (IRID): 92631825
WoS ResearcherID: J-4116-2014
Scopus Author ID: 55538873500
ORCID: 0000-0003-2312-5829
Ведущий инженер, МГТУ им. Н.Э. Баумана
Кандидат технических наук
IstinaResearcherID (IRID): 92631825
WoS ResearcherID: J-4116-2014
Scopus Author ID: 55538873500
ORCID: 0000-0003-2312-5829
Анатолий Анатольевич Жердев
Роль в проекте: основной исполнитель, научный консультант
Ведущий инженер, МГТУ им. Н.Э. Баумана
Доктор технических наук, профессор
WoS ResearcherID: J-3560-2014
Scopus Aut hor ID: 7003915829
Ведущий инженер, МГТУ им. Н.Э. Баумана
Доктор технических наук, профессор
WoS ResearcherID: J-3560-2014
Scopus Aut hor ID: 7003915829
Сергей Сергеевич Чугаев
Роль в проекте: основной исполнитель, проведение экспериментальных исследований
Ведущий инженер, МГТУ им. Н.Э. Баумана
IstinaResearcherID (IRID): 93396653
WoS ResearcherID: O-8861-2014
Scopus Author ID: 57188692245
ORCID: 0000-0002-2376-8691
Ведущий инженер, МГТУ им. Н.Э. Баумана
IstinaResearcherID (IRID): 93396653
WoS ResearcherID: O-8861-2014
Scopus Author ID: 57188692245
ORCID: 0000-0002-2376-8691
Николай Алексеевич
Лавров
Лавров
Роль в проекте: научный консультант
Ведущий инженер, МГТУ им. Н.Э. Баумана
Доктор технических наук, доцент
Scopus Author ID: 36914261500
Ведущий инженер, МГТУ им. Н.Э. Баумана
Доктор технических наук, доцент
Scopus Author ID: 36914261500
Илья Евгеньевич
Меньщиков
Меньщиков
Роль в проекте: проведение экспериментальных исследований
Ведущий инженер, МГТУ им. Н.Э. Баумана
Кандидат химических наук
IstinaResearcherID (IRID): 92357942
WoS ResearcherID: N-4740-2016
Scopus Author ID: 56755440400
ORCID: 0000-0001-8126-1023
Ведущий инженер, МГТУ им. Н.Э. Баумана
Кандидат химических наук
IstinaResearcherID (IRID): 92357942
WoS ResearcherID: N-4740-2016
Scopus Author ID: 56755440400
ORCID: 0000-0001-8126-1023
Игорь Дмитриевич
Шелякин
Шелякин
Роль в проекте: математическое моделирование процессов адсорбции в программном комплексе ANSYS Fluent
Инженер, МГТУ им. Н.Э. Бауман
Инженер, МГТУ им. Н.Э. Бауман
СМИ о нас
Почта для связи:
shkolin@phyche.ac.ru
shkolin@phyche.ac.ru
Адрес:
Россия, Москва, 2-я Бауманская улица, 5, стр. 1
Россия, Москва, 2-я Бауманская улица, 5, стр. 1
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