Truls Gundersen
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View article: Optimized integration strategies for the PMR-based H2 production with CO2 capture process
Optimized integration strategies for the PMR-based H2 production with CO2 capture process Open
This work develops process options using a novel protonic membrane reformer (PMR) and liquefaction-based CO2 capture process for low-carbon hydrogen production from natural gas. Several hybrid concepts of the PMR and liquefaction process a…
View article: Putting the costs and benefits of carbon capture and storage into perspective: a multi-sector to multi-product analysis
Putting the costs and benefits of carbon capture and storage into perspective: a multi-sector to multi-product analysis Open
Carbon dioxide capture, transport, and storage (CCS) is essential in achieving the net-zero target. Despite this increasing recognition, current CCS deployments are far behind targeted ambitions. A key reason is that CCS is often perceived…
View article: Promising Opportunities for Improving Round-Trip Efficiencies in Liquid Air Energy Storage (LAES)
Promising Opportunities for Improving Round-Trip Efficiencies in Liquid Air Energy Storage (LAES) Open
As a promising electricity storage system, Liquid Air Energy Storage (LAES) has the main advantage of being geographically unconstrained. LAES has a considerable potential in energy efficiency improvement by utilizing compression heat and …
View article: Synthesis of heat-integrated water networks considering detailed heat exchanger design
Synthesis of heat-integrated water networks considering detailed heat exchanger design Open
This paper introduces a mathematical programming approach for synthesising heat-integrated water networks (HIWNs) with a detailed heat exchanger design. A common assumption of constant heat capacities of water streams is relaxed. The speci…
View article: Synthesis of heat-integrated water networks: Integration of heat pumps
Synthesis of heat-integrated water networks: Integration of heat pumps Open
A typical heat-integrated water network (HIWN) synthesis problem aims to minimise freshwater and utility consumption while establishing trade-offs between operating and investment costs by exploring different water and heat integration opp…
View article: Simultaneous Optimization of Work and Heat Exchange Networks
Simultaneous Optimization of Work and Heat Exchange Networks Open
This paper introduces a simultaneous optimization approach to synthesizing work and heat exchange networks (WHENs). The proposed work and heat integration (WHI) superstructure enables different thermodynamic paths of pressure and temperatu…
View article: Thermo-Mechanical Exergy of a Substance Below Environmental Pressure
Thermo-Mechanical Exergy of a Substance Below Environmental Pressure Open
In this work, we demonstrate why classical thermo-mechanical exergy functions are incorrect below the environmental reference pressure, since they result in too small or even negative values. We present new derivations for thermo-mechanica…
View article: CO2 Capture and Enhanced Hydrogen Production Enabled by Low-Temperature Separation of PSA Tail Gas: A Detailed Exergy Analysis
CO2 Capture and Enhanced Hydrogen Production Enabled by Low-Temperature Separation of PSA Tail Gas: A Detailed Exergy Analysis Open
Hydrogen from natural gas reforming can be produced efficiently with a high CO2 capture rate. This can be achieved through oxygen-blown autothermal reforming as the core technology, combined with pressure-swing adsorption for hydrogen puri…
View article: CO<sub>2</sub> Capture and Enhanced Hydrogen Production Enabled by Low-Temperature Separation of PSA Tail Gas: A Detailed Exergy Analysis
CO<sub>2</sub> Capture and Enhanced Hydrogen Production Enabled by Low-Temperature Separation of PSA Tail Gas: A Detailed Exergy Analysis Open
Hydrogen from natural gas reforming can be produced efficiently with a high CO2 capture rate. This can be achieved with oxygen-blown autothermal reforming as core technology combined with pressure-swing adsorption for hydrogen purification…
View article: Process design, integration, and optimization of a novel compressed air energy storage for the coproduction of electricity, cooling, and water
Process design, integration, and optimization of a novel compressed air energy storage for the coproduction of electricity, cooling, and water Open
The use of fluctuating renewable energy over a certain threshold may lead to an unmanageable mismatch between the electricity generation and demand profiles threatening the grid's stability. In this study, an innovative complex energy stor…
View article: Optimization under uncertainty of a hybrid waste tire and natural gas feedstock flexible polygeneration system using a decomposition algorithm
Optimization under uncertainty of a hybrid waste tire and natural gas feedstock flexible polygeneration system using a decomposition algorithm Open
Market uncertainties motivate the development of flexible polygeneration systems that are able to adjust operating conditions to favor production of the most profitable product portfolio. However, this operational flexibility comes at the …
View article: Performance improvement of liquid air energy storage: Introducing Stirling engine and solar energy
Performance improvement of liquid air energy storage: Introducing Stirling engine and solar energy Open
Liquid air energy storage (LAES) is a promising energy storage system with the main advantage of being geographically unconstrained. The efficiency of LAES could be improved by utilizing compression heat and integration with other systems.…
View article: On the exergy efficiency of CO2 capture: The relation between sub-process and overall efficiencies
On the exergy efficiency of CO2 capture: The relation between sub-process and overall efficiencies Open
A generic exergy targeting tool for gas separation processes is developed, which is applicable to any defined boundary conditions for incoming feed gas as well as delivered separation products. Whereas targeting tools in the literature so …
View article: Optimal Utilization of Compression Heat in Liquid Air Energy Storage
Optimal Utilization of Compression Heat in Liquid Air Energy Storage Open
Liquid air energy storage (LAES) is regarded as one of the promising large-scale energy storage technologies due to its characteristics of high energy density, being geographically unconstrained, and low maintenance costs. However, the low…
View article: A comprehensive study and tri-objective optimization for an efficient waste heat recovery from solid oxide fuel cell
A comprehensive study and tri-objective optimization for an efficient waste heat recovery from solid oxide fuel cell Open
Since the solid oxide fuel cell (SOFC) has fuel flexibility, high electrical efficiency, and environmental benefits, it is considered a promising electrochemical energy-conversion device. However, it is important to include a waste heat re…
View article: Optimization and analysis of different liquid air energy storage configurations
Optimization and analysis of different liquid air energy storage configurations Open
Energy storage technologies are required to ensure stability of energy systems when the share of renewable energy forms (wind and solar) is increasing. Liquid air energy storage (LAES) is a promising technology for storing electricity with…
View article: An Innovative Polygeneration System Integrating Compressed Air Energy Storage (CAES) and Multi-effect Desalination for Efficient LNG Cold Energy Utilization
An Innovative Polygeneration System Integrating Compressed Air Energy Storage (CAES) and Multi-effect Desalination for Efficient LNG Cold Energy Utilization Open
Liquefied natural gas (LNG) contains a huge amount of cold energy, generally wasted during the regasification process. With the increasing penetration of renewable energy in the grid, the power generation profile does not match well with t…
View article: Techno-economic Analysis of Different Liquid Air Energy Storage Configurations
Techno-economic Analysis of Different Liquid Air Energy Storage Configurations Open
With the increasing use of renewables in energy systems, grid stability becomes a major issue due to the intermittent nature of energy sources such as solar and wind. To compensate for the unstable renewable energy sources, storage technol…
View article: CO2 Capture from IGCC by Low-Temperature Synthesis Gas Separation
CO2 Capture from IGCC by Low-Temperature Synthesis Gas Separation Open
Capture conditions for CO2 vary substantially between industrial point sources. Depending on CO2 fraction and pressure level, different capture technologies will be required for cost- and energy-efficient decarbonisation. For decarbonisati…
View article: Optimal recovery of thermal energy in liquid air energy storage
Optimal recovery of thermal energy in liquid air energy storage Open
The increasing share of renewables in energy systems requires energy storage technologies to handle intermittent energy sources and varying energy sinks. Liquid air energy storage (LAES) is a promising technology since it has a high energy…
View article: At what Pressure Shall CO2 Be Transported by Ship? An in-Depth Cost Comparison of 7 and 15 Barg Shipping
At what Pressure Shall CO2 Be Transported by Ship? An in-Depth Cost Comparison of 7 and 15 Barg Shipping Open
The pipeline has historically been the preferred means to transport CO2 due to its low cost for short distances and opportunities for economies of scale. However, interest in vessel-based transport of CO2 is growing. While most of the lite…
View article: Optimal design and operation of an Organic Rankine Cycle (ORC) system driven by solar energy with sensible thermal energy storage
Optimal design and operation of an Organic Rankine Cycle (ORC) system driven by solar energy with sensible thermal energy storage Open
In this study, the optimal design and operation of an Organic Rankine Cycle (ORC) system driven by solar energy is investigated. A two-tank sensible thermal energy storage system is configured to overcome the intermittency of solar energy.…