Low-carbon hydrogen can play a significant role in decarbonizing the world. Hydrogen is currently mainly produced from fossil sources,requiring additional CO_(2)capture to decarbonize, which energy intense and costly....Low-carbon hydrogen can play a significant role in decarbonizing the world. Hydrogen is currently mainly produced from fossil sources,requiring additional CO_(2)capture to decarbonize, which energy intense and costly. In a recent Green Energy & Environment paper, Cheng and Di et al. proposed a novel integration process referred to as SECLR_(HC) to generate high-purity H_(2) by in-situ separation of H_(2)and CO without using any additional separation unit. Theoretically, the proposed process can essentially achieve the separation of C and H in gaseous fuel via a reconfigured reaction process, and thus attaining high-purity hydrogen of ~99%, as well as good carbon and hydrogen utilization rates and economic feasibility. It displays an optimistic prospect that industrial decarbonization is not necessarily expensive, as long as a suitable CCS measure can be integrated into the industrial manufacturing process.展开更多
Industrial applications that require steam for their end-use generally utilize steam boilers that are typically oversized,citing operations flexibility.Similarly,gas turbine-based power plants corroborate a gas turbin...Industrial applications that require steam for their end-use generally utilize steam boilers that are typically oversized,citing operations flexibility.Similarly,gas turbine-based power plants corroborate a gas turbine system that may eventually relieve the usable exhaust into the atmosphere.This study explores the economic and technical feasibility of a topping cycle combined heat and power(CHP)system.It does so by leveraging a partially loaded boiler or gas turbine by increasing its unused load to generate steam and heat for subsequent usage.To this end,a decision support tool(COGENTEC)was developed,which emulates a given facility’s boiler or gas-turbine system,and its operational parameters with the application of steam turbines.The tool provides necessary insights into the most appropriate parameters that enable a CHP system to be technically and economically advantageous.Based on input variables such as boiler-rated capacity,steam pressure,steam temperature,and existing boiler load,among others,COGENTEC designs a topping cycle CHP system to inform a user whether this system is feasible in their facility or not.If applicable,the tool assists the user to realize the point of break-even(fuel cost incurred and cost savings)at the desired steam flow rate.It also conducts sensitivity analyses between energy usage,cost savings,and payback on the investment of the operating parameters to understand the relationship between relevant variables.By utilizing parameters from a pulp and paper manufacturing facility,the research determines that the fuel cost,electricity cost,and steam flow rate are the most important parameters for the feasibility of the system with a desirable payback on the investment.展开更多
This study proposes a conceptual design of green hydrogen production via proton exchange membrane electrolysis powered by a floating solar photovoltaic system.The system contributes to industrial decarbonization in wh...This study proposes a conceptual design of green hydrogen production via proton exchange membrane electrolysis powered by a floating solar photovoltaic system.The system contributes to industrial decarbonization in which hydrogen blending with natural gas is proposed as an approach to smooth the energy transition.The proposed design addresses the challenge of supplying a continuous flow-rate of green hydrogen,which is typically demanded by industrial end users.This study particularly considers a realistic area required for the installation of a floating solar photovoltaic system.To enable the green hydrogen production of 7.5 million standard cubic feet per day,the required structure includes the floating solar photovoltaic system and Li-ion batteries with the nominal capacities of 518.4 megawatts and 780.8 megawatt-hours.This is equivalent to the requirement for 1524765 photovoltaic modules and 3718 Li-ion batteries.The assessment confirms the technical viability of the proposed concept of green hydrogen production,transportation and blending.While the present commercialization is hindered by economics due to a high green hydrogen production cost of USD 26.95 per kg,this green hydrogen pathway is expected to be competitive with grey hydrogen produced via coal gasification and via natural gas steam reforming by 2043 and 2047,respectively.展开更多
Steam generating heat pump(SGHP)is a key technology for industrial decarbonization.For comprehensive evalu-ation of the feasibility and reliability of SGHP in different industrial sector,the work develops a thorough e...Steam generating heat pump(SGHP)is a key technology for industrial decarbonization.For comprehensive evalu-ation of the feasibility and reliability of SGHP in different industrial sector,the work develops a thorough evaluation model for assessing the performance of SGHP by considering waste heat recovery,CO_(2) trading value,and pollut-ant emission cost,in addition to the conventional evaluation criteria.This work presents a thorough comparison of the thermodynamic performance and sustainability of various types of SGHPs across different industrial sector.Additionally,the conflicting relationships between the coefficient of performance(COP)and exergy efficiency are balanced through the application of the technique for order preference by similarity to ideal solution(TOPSIS).The results show that all the indexes of SGHP connected to an open heat pump(SGHPO)with different application sce-narios are higher than those of SGHP connected to a flash tank(SGHPF).At the most unfavorable operating condi-tion of the system,the COP minimum value is 1.31 and the exergy efficiency minimum value is 20.42%.These results indicate that replacing the coal-fired boiler with SGHP is feasible and the work could provide theoretical guidance for optimal design and equipment manufacture.展开更多
文摘Low-carbon hydrogen can play a significant role in decarbonizing the world. Hydrogen is currently mainly produced from fossil sources,requiring additional CO_(2)capture to decarbonize, which energy intense and costly. In a recent Green Energy & Environment paper, Cheng and Di et al. proposed a novel integration process referred to as SECLR_(HC) to generate high-purity H_(2) by in-situ separation of H_(2)and CO without using any additional separation unit. Theoretically, the proposed process can essentially achieve the separation of C and H in gaseous fuel via a reconfigured reaction process, and thus attaining high-purity hydrogen of ~99%, as well as good carbon and hydrogen utilization rates and economic feasibility. It displays an optimistic prospect that industrial decarbonization is not necessarily expensive, as long as a suitable CCS measure can be integrated into the industrial manufacturing process.
基金funded in part by the IndustrialAssessmentCenter Project,supported by grants fromthe US Department of Energy and by theWest Virginia Development Office.
文摘Industrial applications that require steam for their end-use generally utilize steam boilers that are typically oversized,citing operations flexibility.Similarly,gas turbine-based power plants corroborate a gas turbine system that may eventually relieve the usable exhaust into the atmosphere.This study explores the economic and technical feasibility of a topping cycle combined heat and power(CHP)system.It does so by leveraging a partially loaded boiler or gas turbine by increasing its unused load to generate steam and heat for subsequent usage.To this end,a decision support tool(COGENTEC)was developed,which emulates a given facility’s boiler or gas-turbine system,and its operational parameters with the application of steam turbines.The tool provides necessary insights into the most appropriate parameters that enable a CHP system to be technically and economically advantageous.Based on input variables such as boiler-rated capacity,steam pressure,steam temperature,and existing boiler load,among others,COGENTEC designs a topping cycle CHP system to inform a user whether this system is feasible in their facility or not.If applicable,the tool assists the user to realize the point of break-even(fuel cost incurred and cost savings)at the desired steam flow rate.It also conducts sensitivity analyses between energy usage,cost savings,and payback on the investment of the operating parameters to understand the relationship between relevant variables.By utilizing parameters from a pulp and paper manufacturing facility,the research determines that the fuel cost,electricity cost,and steam flow rate are the most important parameters for the feasibility of the system with a desirable payback on the investment.
基金funded by the Osaka Gas Foundation of International Cultural Exchange Year 2022/2023(PKS-1813/UN2.F4.D/PPM.00.00/2022).
文摘This study proposes a conceptual design of green hydrogen production via proton exchange membrane electrolysis powered by a floating solar photovoltaic system.The system contributes to industrial decarbonization in which hydrogen blending with natural gas is proposed as an approach to smooth the energy transition.The proposed design addresses the challenge of supplying a continuous flow-rate of green hydrogen,which is typically demanded by industrial end users.This study particularly considers a realistic area required for the installation of a floating solar photovoltaic system.To enable the green hydrogen production of 7.5 million standard cubic feet per day,the required structure includes the floating solar photovoltaic system and Li-ion batteries with the nominal capacities of 518.4 megawatts and 780.8 megawatt-hours.This is equivalent to the requirement for 1524765 photovoltaic modules and 3718 Li-ion batteries.The assessment confirms the technical viability of the proposed concept of green hydrogen production,transportation and blending.While the present commercialization is hindered by economics due to a high green hydrogen production cost of USD 26.95 per kg,this green hydrogen pathway is expected to be competitive with grey hydrogen produced via coal gasification and via natural gas steam reforming by 2043 and 2047,respectively.
基金supported by China Postdoctoral Science Foundation(2023M740165)Inner Mongolia Science and Technology Major Project(2021SZD0036)Beijing Natural Science Foundation(3242015).
文摘Steam generating heat pump(SGHP)is a key technology for industrial decarbonization.For comprehensive evalu-ation of the feasibility and reliability of SGHP in different industrial sector,the work develops a thorough evaluation model for assessing the performance of SGHP by considering waste heat recovery,CO_(2) trading value,and pollut-ant emission cost,in addition to the conventional evaluation criteria.This work presents a thorough comparison of the thermodynamic performance and sustainability of various types of SGHPs across different industrial sector.Additionally,the conflicting relationships between the coefficient of performance(COP)and exergy efficiency are balanced through the application of the technique for order preference by similarity to ideal solution(TOPSIS).The results show that all the indexes of SGHP connected to an open heat pump(SGHPO)with different application sce-narios are higher than those of SGHP connected to a flash tank(SGHPF).At the most unfavorable operating condi-tion of the system,the COP minimum value is 1.31 and the exergy efficiency minimum value is 20.42%.These results indicate that replacing the coal-fired boiler with SGHP is feasible and the work could provide theoretical guidance for optimal design and equipment manufacture.
