| 1. |
- Campana, Pietro Elia, et al.
(författare)
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Optimal grassland locations for sustainable photovoltaic water pumping systems in China
- 2015
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Ingår i: CLEAN, EFFICIENT AND AFFORDABLE ENERGY FOR A SUSTAINABLE FUTURE. - : Elsevier. ; 75, s. 301-307
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Konferensbidrag (refereegranskat)abstract
- Grassland is of strategic importance for food security of China because of the high number of livestock raised in those areas. Grassland degradation due to climate change and overgrazing is thus regarded as severe environmental and economic threat for a sustainable future development of China. Photovoltaic water pumping (PVWP) systems for irrigation can play an important role for the conservation of grassland areas, halting degradation, improving its productivity and farmers' income and living conditions. The aim of this paper is to identify the technically suitable grassland areas for the implementation of PVWP systems by assessing spatial data on land cover and slope, precipitation, potential evapotranspiration and water stress index. Furthermore, the optimal locations for installing PVWP systems have been assessed using a spatially explicit renewable energy systems optimization model based on the minimization of the cost of the whole supply chain. The results indicate that the PVWP-supported grassland areas show high potential in terms of improving forage productivity to contribute to supplying the local demand. Nevertheless, the optimal areas are highly sensitive to several environmental and economic parameters such as ground water depth, forage water requirements, forage price and CO2 emission costs. These parameters need to be carefully considered in the planning process to meet the forage yield potentials. (C) 2015 The Authors. Published by Elsevier Ltd.
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| 2. |
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| 3. |
- Harahap, Fumi, 1983-, et al.
(författare)
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Meeting the bioenergy targets from palm oil based biorefineries : An optimal configuration in Indonesia
- 2020
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Ingår i: Applied Energy. - : Elsevier Ltd. - 0306-2619 .- 1872-9118. ; 278
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Tidskriftsartikel (refereegranskat)abstract
- Biorefineries provide opportunities to improve the economic, environmental, and social performance of bio-based production systems. Prudent planning of plant configuration and localization is however of great merit to obtain maximum benefits from biorefineries. This study investigates optimal deployment of palm oil-based biorefineries on the two major islands of Indonesia, Sumatra and Kalimantan. In addition, the results of the optimal bioenergy (bioelectricity, biodiesel, ethanol) production are used to calculate the potential contribution of the palm oil industry according to the national bioenergy targets from 2020 to 2030. This work also offers a new perspective of analyzing the role of bioenergy in the palm oil industry in relation to meeting the bioenergy targets through the development of spatially explicit optimization model, BeWhere Indonesia. Results show that the palm oil-based biorefineries in Sumatra and Kalimantan can produce 1–1.25 GW of electricity, 4.6–12.5 bL of biodiesel, and 2.8–4.8 bL of ethanol in 2030. Significant efforts in terms of mobilization of resources and economic instruments are required to harness the full potential offered by the palm oil-based biorefineries. This study provides an important insight on how palm oil biorefineries can be developed for their enhanced roles in meeting global sustainability efforts.
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| 4. |
- Harahap, Fumi, 1983-, et al.
(författare)
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Opportunities to Optimize the Palm Oil Supply Chain in Sumatra, Indonesia
- 2019
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Ingår i: Energies. - : MDPI AG. - 1996-1073. ; 12:3
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Tidskriftsartikel (refereegranskat)abstract
- Significant amounts of biomass residues were generated in Indonesia. While untreated, residues emit greenhouse gases during the decomposition process. On the other hand, if efficiently utilized, these residues could be used to produce value-added products. This study investigates opportunities for harnessing the full potential of palm oil residues (i.e., empty fruit bunches, kernel shells, fiber, and mill effluent). As far as we are aware, the study is the first attempt to model the palm oil supply chain in a geographically explicit way while considering regional infrastructures in Sumatra Island, Indonesia. The BeWhere model, a mixed integer linear programming model for energy system optimization, was used to assess the costs and benefits of optimizing the regional palm oil supply chain. Different scenarios were investigated, considering current policies and new practices leading to improved yields in small-scale plantations and power grid connectivity. The study shows that a more efficient palm oil supply chain can pave the way for the country to meet up to 50% of its national bioenergy targets by 2025, and emission reductions of up to 40 MtCO2eq/year. As much as 50% of the electricity demand in Sumatra could be met if residues are efficiently used and grid connections are available. We recommend that system improvements be done in stages. In the short to medium term, improving the smallholder plantation yield is the most optimal way to maximize regional economic gains from the palm oil industry. In the medium to long term, improving electricity grid connection to palm oil mills could bring higher economic value as excess electricity is commercialized.
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| 5. |
- Harahap, Fumi, 1983-, et al.
(författare)
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The role of oil palm biomass to meet liquid biofuels target in Indonesia
- 2019
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Ingår i: Proceedings of the 32nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems. - Poland : Institute of Thermal Technology. - 9788361506515 ; , s. 1509-1524
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Konferensbidrag (refereegranskat)abstract
- Indonesia aims at reducing the dependence on oil import by liquid biofuels consumption (i.e., biodiesel and bio-ethanol) in industry, transport and power sectors. The palm oil industry has played significant role in the development of biodiesel in the country producing crude palm oil (CPO) and palm fatty acid distillate (PFAD) based biodiesel. Opportunity exists for the industry to contribute to the development of bio-ethanol program by utilising the lignocellulosic biomass such as the empty fruit bunches (EFB). This study evaluates the potential of liquid biofuels production from oil palm biomass and the domestic demand for biofuels as per biofuel blending target set by the Indonesian government. The existing infrastructures as well as the investment opportunity of each type of biofuel are analyzed. While technology for biodiesel production is proven at large scale, the bio-ethanol production from EFB is not commercialized yet. The study shows that meeting the biodiesel blending target is at risk if Indonesia continues to solely reliance on the production of CPO and PFAD based biodiesel. Palm oil industry can produce nearly 7 billion litres biodiesel from CPO and PFAD in 2025 but the biodiesel domestic demand is 30% higher. The bio-ethanol program faces higher risk. EFB based ethanol through gasification and synthesis of alcohol can contribute to around 13% of the target in 2025, however the infrastructure is not ready yet. Feedstock diversification to produce liquid biofuels should be prioritized. We recommend a review of the current plan to a more achievable targets or prolong the timeline in order to secure domestic biofuels demand while continuing export. The study provides database for future modelling exercise on multi-period optimization study of palm biofuels supply chain in Indonesia in a geographically explicit way.
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| 6. |
- Kraxner, Florian, et al.
(författare)
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Planning the future forests: managing for wildlife in a climate constrained landscape
- 2017
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Ingår i: Book of Abstracts. - 9783902762887 ; , s. 655-
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Konferensbidrag (refereegranskat)abstract
- Multipurpose functionality is a paradigm when it comes to forest management. This includes sustainability, resilience, stand stability, wildlife management, recreation, clean water and air, or healthy soils - to name a few. The world is aiming at a maximum global warming of 2-deg by 2100, but cumulative emissions are still rising. Higher temperatures are associated with higher risks of extreme events such as storm, flood, droughts, pests and fires etc. - and at the same time, forest systems are key for any mitigation activity to avoid such dangerous climate change. But how will a managed forest look like in the future? How can we understand the underlying dynamics and make our forests fit for the increased need for carbon storage, biomass for energy and sustainable wood and non-wood forest products like game, while maintaining biodiversity, recreational and protected areas. Moreover, we need to address all challenges on limited land and establish action from policy development allthe way to their implementation within a short time frame. Based on Sweden's forests, traditionally considered a role model for successfully bridging a multitude of demands, we present a modeling approach that should serve as a planning tool for enhancing forests' risk resilience and capacity of integrating diverse demands and different ecosystem-services. Guided by the expertise of Sweden's Environmental Protection Agency, national forest and habitat shift models from SLU and KTH will be linked with global land use models and engineering tools from IIASA. Hereby, special emphasis will be put on ecosystem services from wildlife, different scenarios of forest intensification and the optimization of biomass for bioenergy production. First estimates show that spatially explicit modeling can substantially support decision making by optimizing multipurpose use of both managed and protected areas and steering habitat shift for maintaining biodiversity and improving wildlife (game)management.
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| 7. |
- Lindahl, Karin Beland, et al.
(författare)
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Nordic Forest Futures : An Introduction
- 2015
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Ingår i: The Future Use of Nordic Forests. - Cham : Encyclopedia of Global Archaeology/Springer Verlag. - 9783319142173 - 9783319142180 ; , s. 1-10
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Bokkapitel (refereegranskat)abstract
- This book focuses on how global trends are likely to affect the future use of Nordic forests. The aim is to contribute to a broad debate about future Nordic forest management. The book invites professionals in the forest sector, civil society organizations and decision makers to be part of a dialog about the opportunities, challenges, and trade-offs associated with future forest use. The book is produced within the Future Forests Research Program (www.futureforests.se), a major cross-disciplinary research effort to address future Swedish forest use in the light of climate change and an increasing demand for forest-related products and services
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| 8. |
- Mandova, Hana, et al.
(författare)
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Achieving carbon-neutral iron and steelmaking in Europe through the deployment of bioenergy with carbon capture and storage
- 2019
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Ingår i: Journal of Cleaner Production. - : Elsevier. - 0959-6526 .- 1879-1786. ; 218, s. 118-129
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Tidskriftsartikel (refereegranskat)abstract
- The 30 integrated steel plants operating in the European Union (EU) are among the largest single-point CO 2 emitters in the region. The deployment of bioenergy with carbon capture and storage (bio-CCS) could significantly reduce their emission intensities. In detail, the results demonstrate that CO 2 emission reduction targets of up to 20% can be met entirely by biomass deployment. A slow CCS technology introduction on top of biomass deployment is expected, as the requirement for emission reduction increases further. Bio-CCS could then be a key technology, particularly in terms of meeting targets above 50%, with CO 2 avoidance costs ranging between €60 and €100 t CO2 −1 at full-scale deployment. The future of bio-CCS and its utilisation on a larger scale would therefore only be viable if such CO 2 avoidance cost were to become economically appealing. Small and medium plants in particular, would economically benefit from sharing CO 2 pipeline networks. CO 2 transport, however, makes a relatively small contribution to the total CO 2 avoidance cost. In the future, the role of bio-CCS in the European iron and steelmaking industry will also be influenced by non-economic conditions, such as regulations, public acceptance, realistic CO 2 storage capacity, and the progress of other mitigation technologies.
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| 9. |
- Mandova, Hana, et al.
(författare)
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Modelling bio-CCS deployment across iron and steel plants in Europe
- 2018
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Ingår i: GHGT 2018 - 14th International Conference on Greenhouse Gas Control Technologies. - : Elsevier.
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Konferensbidrag (refereegranskat)abstract
- Iron and steel production is highly reliant on coal, which makes integrated steel plants one of the largest single point CO2 emitters. Technologies that would significantly reduce their coal consumption are currently still at pilot scale. Hence opportunities for bioenergy and CCS as emission reduction strategies are evaluated, as they could be directly integrated within the existing iron and steelmaking setup. At the same time, their co-application – referred to as bio-CCS – can further enhance the emission reduction potential of each one of them. This can result in low-carbon steelmaking emitting over 80% less emissions in comparison to today, which would satisfy the EU targets set for 2050. This work gives an overview of modelling bio-CCS systems, specifically incorporated within the techno-economic BeWhere model, focusing on the deployment of bio-CCS across the integrated steel plants in Europe. The obtained results give an estimate of the average CO2 avoidance cost of 86 € tCO2-1, but high variation is present across the individually plants, ranging between 62 and 114 € tCO2-1. Overall, bio-CCS provides an opportunity to achieve net-zero CO2 emissions occurring on-site (when assuming carbon neutrality of biomass). Modelling possibilities for bio-CCS integration is complex, due to a sophisticated and unique setup of energy usage across each integrated plant together with multiple social-technical factors that may limit their CO2 transport and storage. Introduction of numerous assumptions is hence necessary to overcome those barriers, particularly related to issues on data availability.
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| 10. |
- Meng, Ying, et al.
(författare)
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Hydropower Production Benefits More From 1.5 °C than 2 °C Climate Scenario
- 2020
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Ingår i: Water resources research. - : Blackwell Publishing Ltd. - 0043-1397 .- 1944-7973. ; 56:5
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Tidskriftsartikel (refereegranskat)abstract
- Hydropower plays an important role as renewable and clean energy in the world's overall energy supply. Electricity generation from hydropower represented approximately 16.6% of the world's total electricity and 70% of all renewable electricity in 2015. Determining the different effects of 1.5 and 2 °C of global warming has become a hot spot in water resources research. However, there are still few studies on the impacts of different global warming levels on gross hydropower potential. This study used a coupled hydrological and techno-economic model framework to assess hydropower production under global warming levels of 1.5 and 2 °C, while also considering gross hydropower potential, power consumption, and economic factors. The results show that both global warming levels will have a positive impact on the hydropower production of a tropical island (Sumatra) relative to the historical period; however, the ratio of hydropower production versus power demand provided by 1.5 °C of global warming is 40% higher than that provided by 2 °C of global warming under RCP6.0. The power generation by hydropower plants shows incongruous changing trends with hydropower potential under the same global warming levels. This inconformity occurs because the optimal sites for hydropower plants were chosen by considering not only hydropower potential but also economic factors. In addition, the reduction in CO2 emissions under global warming of 1.5 °C (39.06 × 106 t) is greater than that under global warming of 2 °C (10.20 × 106 t), which reveals that global warming decreases the benefits necessary to relieve global warming levels. However, the hydropower generation and the reduction in CO2 emissions will be far less than the energy demand when protected areas are excluded as potential sites for hydropower plants, with a sharp decrease of 40–80%. Thus, government policy-makers should consider the trade-off between hydropower generation and forest coverage area in nationally determined contributions. © 2020 The Authors.
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