| 1. |
- Hansson, Julia, et al.
(författare)
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HOPE - Hydrogen fuel cells solutions in Nordic shipping. Project summary : A Nordic Maritime Transport and Energy Research Programme Project
- 2023
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- The Nordic countries aim for a carbon-neutral Nordic region. Maritime transport is one of the key remaining sectors to decarbonize and is important from a Nordic perspective due to the relatively large Nordic involvement in this industry. The HOPE project addresses how regional shipping in the Nordic region can do the transition to become fossil-free. The project aims at clarifying the potential role of hydrogen based marine solutions in reducing the Nordic greenhouse gas (GHG) emissions. In the centre of the project is a ship concept where a typical RoPax-vessel with operating distances of around 100 nautical miles is designed for including operation with hydrogen as fuel and fuel cells for energy conversion. The overall design of the concept ship is compared with selected other fuel alternatives from a cost perspective. Further, both the conditions for designing such a ship and the consequences are studied. The conditions include technical design and costs of fuel systems and handling, powertrains etc. but also an analysis of barriers and drivers for the realisation of hydrogen solutions for shipping, such as economic, legal, and policy issues. For example, in terms of drivers, policy options needed to accelerate the uptake of hydrogen based marine solutions are assessed. Strategies and the potential of producing these fuels in the Nordic region are also reviewed from a shipping perspective. A realistic potential for uptake of these technologies/fuels by Nordic shipping are assessed and the benefits regarding lower emissions of GHGs and air pollutants are estimated. This report summarizes the assessments made in the HOPE project including main findings.
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| 2. |
- Jivén, Karl, et al.
(författare)
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Concept design and environmental analysis of a fuel cell RoPax vessel - Report in the HOPE (Hydrogen fuel cells solutions in shipping in relation to other low carbon options) project
- 2023
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- This report includes a ship concept design developed for a RoPax ship (a ferry transporting passengers and goods) with hydrogen fuel cell propulsion for intended operations on the route Frederikshavn (Denmark) to Gothenburg (Sweden). The assessments, performed within the HOPE (Hydrogen fuel cells solutions in shipping in relation to other low carbon options – a Nordic perspective) project, shows that it is technically feasible to build and operate such a ship with existing technology for the studied route between these two Nordic countries. Also, the costs of such a concept are assessed and compared to other fuel options including: battery-electric propulsion, electro-ammonia, electro-methanol, biomass-based methane, or fossil liquefied natural gas (LNG), as well as conventional fossil marine gas oil (MGO).The overall result from the comparative analysis of the estimated costs is that the hydrogen fuel cell ship, when assuming current or near future costs for the technology and the hydrogen, is estimated to be some 25 percent more expensive than a conventional fossil fuelled (MGO) RoPax ship (when including costs for emissions in the EU emission trading scheme). However, the cost developments are uncertain. In the case that fuel cell prices, and hydrogen prices, are decreasing, and todays cost levels of emission allowances in the EU emission trading scheme (ETS) increase, the hydrogen fuel cell ship could possibly be operated at lower total costs compared to the MGO fuelled ship.A cost benefit analysis was also performed, comparing costs linked to the technical implementation of hydrogen fuel cell solutions in shipping (with a private and social perspective) to benefits in terms of reduced external costs linked to lower emissions and potential subsides. The cost benefit assessment also confirms that the investment from a private perspective is not cost effective and that additional subsidies may be needed for investments in fuel cell hydrogen technology to take place. The cost effectiveness from a social perspective is strongly dependent on values of highly uncertain parameters.The impacts of emissions of hydrogen as fuel in a Nordic context were assessed for deployment scenarios for hydrogen and fuel cell solutions in Nordic shipping. There is a considerable potential for emission reductions both in terms of CO2, nitrogen oxides (NOX), sulphur dioxide (SO2) and particulate matter (PM) linked to the implementation of hydrogen and fuel cells in Nordic shipping, particularly in the RoPax segment, representing 30% of total CO2 emissions in 2018. Considering the relatively long lifetime of vessels, investments must be made soon to enable a hydrogen powered shipping fleet in the near future. Since it is currently not economically viable with hydrogen and fuel cells vessels there is need for subsidies and investments in pilots to develop solutions and speed up the process.
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| 3. |
- Balador, Ali, et al.
(författare)
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AORTA: Advanced Offloading for Real-time Applications
- 2023
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Konferensbidrag (refereegranskat)abstract
- We are currently witnessing the second wave of cloud services that go beyond web storefronts and IT systems, aiming for digitalization of industrial systems. Automation and time-sensitive systems are now taking their first steps toward the cloud. The AORTA project aims to facilitate this transition by providing key technology components needed for real-time services running in the cloud. The ambition is to support a future robotics ecosystem that enables a new level of flexible productivity in industrial production. AORTA will develop technologies that allow offloading of real-time services/functions to the edge and cloud. We will build upon recent advances in 5G, cloud, and networking technologies. The AORTA framework will support a fluid compute model where functionality will be dynamically deployed locally, in the edge, or in the cloud and support integration and real-time performance irrespective of where it executes. Results of the project will be demonstrated in a real-world robotics manufacturing and construction scenarios operating via a 5G network with real-time edge and large-scale cloud service. The AORTA technologies will provide opportunities for automation enterprises and system integrators by adding real-time capabilities needed to evolve beyond the currently closed ecosystem. They will also add value to telecom providers and operators that may host these new automation services in addition to their current portfolio.
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| 4. |
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| 5. |
- Hansson, Jonas, et al.
(författare)
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Next generation relay autotuners—analysis and implementation
- 2021
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Ingår i: Proceedings of the 5th IEEE Conference on Control Technologies and Applications (CCTA) 2021. ; , s. 1075-1982
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Konferensbidrag (refereegranskat)abstract
- In order to produce models for automatic controller tuning, this paper proposes a method that combines a short experiment with a novel scheme for approximating processes using low-order time-delayed models. The method produces models aimed to tune PI and PID controllers, but they could also be used for other model-dependent controllers like MPC. The proposed method has been evaluated in simulations on benchmark processes. It has also been implemented in an industrial controller and tested experimentally on a water-tank process. It is shown that our method is successful in estimating models for a variety of processes such as lag-dominated, delay-dominated, balanced, and integrating processes. We also demonstrate that the experiment time is both shorter and more predictable than currently used autotuners.
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| 6. |
- Lundh, Magnus, et al.
(författare)
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Model optimization for autotuners in industrial control systems
- 2021
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Ingår i: Proceedings of the 26th International Conference on Emerging Technologies and Factory Automation (ETFA). - 9781728129891 ; , s. 1-4
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Konferensbidrag (refereegranskat)abstract
- Automatic tuning of PID controllers using relay feedback experiments has received attention on and off since it was first proposed and industrially implemented in a control system in the 1980s. While optimal experiment design and modern system identification easily outperform the original automatic tuner, they rely on computational resources that are not always available in industrial control systems. Here we present a combination of experiment and subsequent output-error identification of continuoustime first-order time-delayed (FOTD) system models, that requires very little in terms of computations and memory. The method has been extensively evaluated in simulation, and a prototype has been implemented for the ABB AC 800M controller family.
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| 7. |
- Nordquist, Birgitta, et al.
(författare)
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Peoples experience of the indoor climate in wind exposed apartments
- 2010
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Konferensbidrag (refereegranskat)abstract
- Apartment buildings have been built in a wind exposed area situated close to the seaside in Malmö, Sweden. Several goals when building these apartments have been articulated, for example low energy usage, validation of the leakage factor and a satisfying indoor environment. The purpose of this study is to examine how the people living in the apartments experience the indoor climate. Their experience has been studied by a questionnaire. 201 persons have responded to the questionnaire. The overall result in terms of indoor climate and health experience shows a sufficient experience of the indoor climate. One interesting finding is that a factor related to the air-tightness; the experience of draught stands out. The apartments have also been divided into sub-groups and one finding has been that the people in the apartments exposed to wind, the outer layer of the city block, experience a doubled amount of draught compared to the people living inside the city block and sheltered from wind. The results may also be interpretated as that if a building is planned to be built in wind exposed surroundings this issue should be addressed and that a tight building is important to build, also for indoor climate reasons.
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