scholarly journals Data-Driven Regionalization of Decarbonized Energy Systems for Reflecting Their Changing Topologies in Planning and Optimization

Energies ◽  
2020 ◽  
Vol 13 (16) ◽  
pp. 4076
Author(s):  
Martin Kueppers ◽  
Christian Perau ◽  
Marco Franken ◽  
Hans Joerg Heger ◽  
Matthias Huber ◽  
...  
Keyword(s):  
Renewable Energy Sources ◽  
Energy Systems ◽  
Energy System ◽  
Fine Tuning ◽  
Data Driven ◽  
Spatially Resolved ◽  
Grid Topology ◽  
Data Driven Approach

The decarbonization of energy systems has led to a fundamental change in their topology since generation is shifted to locations with favorable renewable conditions. In planning, this change is reflected by applying optimization models to regions within a country to optimize the distribution of generation units and to evaluate the resulting impact on the grid topology. This paper proposes a globally applicable framework to find a suitable regionalization for energy system models with a data-driven approach. Based on a global, spatially resolved database of demand, generation, and renewable profiles, hierarchical clustering with fine-tuning is performed. This regionalization approach is applied by modeling the resulting regions in an optimization model including a synthesized grid. In an exemplary case study, South Africa’s energy system is examined. The results show that the data-driven regionalization is beneficial compared to the common approach of using political regions. Furthermore, the results of a modeled 80% decarbonization until 2045 demonstrate that the integration of renewable energy sources fundamentally changes the role of regions within South Africa’s energy system. Thereby, the electricity exchange between regions is also impacted, leading to a different grid topology. Using clustered regions improves the understanding and analysis of regional transformations in the decarbonization process.

scholarly journals Enabling Technologies for Sector Coupling: A Review on the Role of Heat Pumps and Thermal Energy Storage

Energies ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 8195
Author(s):  
Omais Abdur Rehman ◽  
Valeria Palomba ◽  
Andrea Frazzica ◽  
Luisa F. Cabeza
Keyword(s):  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Renewable Energy Sources ◽  
District Heating ◽  
Energy Systems ◽  
Energy System ◽  
Heat Pumps ◽  
Enabling Technologies

In order to reduce greenhouse gas emissions, current and future energy systems need to be made more efficient and sustainable. This change can be accomplished by increasing the penetration of renewable energy sources and using efficient technologies in energy generation systems. One way to improve the operation of the whole energy system is through the generation and end-use sector coupling. Power-to-heat energy conversion and storage technologies, in this view, are enabling technologies that can help in balancing and improving the efficiency of both thermal and electric grids. In the present paper, a comprehensive analysis of the role of heat pumps and thermal energy storage for sector coupling is presented. The main features of the analyzed technologies are presented in the context of smart electric grid, district heating and cooling and multi-carrier energy systems, and recent findings and developments are highlighted. Finally, the technical, social, and economic challenges in the adoption of investigated technologies are discussed.

scholarly journals Modelling the impacts of challenging 2030 DPRK’s GHGs mitigation targets on DPRK’s energy system

2020 ◽  
Vol 145 ◽  
pp. 02079 ◽  
Author(s):  
Yongjae An ◽  
Haijun Cao ◽  
Cholu Kwon
Keyword(s):  
Ghg Emissions ◽  
Energy Systems ◽  
Energy System ◽  
Interesting Case ◽  
Emissions Reduction ◽  
Energy Technology ◽  
Systems Modelling ◽  
Business As Usual

The DPRK ratified the Paris Agreement on 1st August 2016 and fully committed to achieving goals for reduction of greenhouse gas (GHG) in its Intended Nationally Determined Contribution (INDC) which was submitted on 3rd October 2016. The DPRK’s INDC includes a mitigation and an adaptation component. In the mitigation component, as unconditional contribution, DPRK intends to achieve with domestic resources the reduction of GHG emissions by 8% by 2030 as compared to Business as Usual (BAU) scenario. Moreover, the conditional contributions are measures that could be implemented if additional international financial support, technology transfer and capacity building are received. The national contribution could be increased up to 40% with international support. This paper focuses on these mitigation targets for DPRK by an interesting case study of GHG emissions for a 12 year period from 1990 to 2002. We proposed the DPRK’s GHGs mitigation model by analyzing the Irish TIMES (The Integrated MARKAL–EFOM System) energy systems modelling tool, and proved the technical availability of CO2-8 scenario delivering an 8% emissions reduction target by 2030. We then compared the scenario results in terms of changes in energy technology, the role of energy efficiency and renewable energy.

scholarly journals A review of challenges and benefits of integration of CHP plant into the grid: a case study in Serbia

2021 ◽  
Author(s):  
Rade M. Ciric ◽  
Sasa N. Mandic
Keyword(s):  
Energy Efficiency ◽  
Negative Impact ◽  
Renewable Energy Sources ◽  
Increase Energy Efficiency ◽  
High Voltage Supply ◽  
The Republic ◽  
Technical Solutions ◽  
The Impact

AbstractThe Republic of Serbia must make significant efforts to promote and exploit renewable energy sources and increase energy efficiency in all energy sectors to ensure energy security and economic competitiveness, reduce the negative impact on the environment from energy production and use, and contribute to global efforts to reduce greenhouse gases. Within the paper several issues of integration of recently realized CHP plant are introduced and discussed. Firstly, the legal and energy policy issues in the Republic of Serbia regarding connecting CHP to the grid are presented. The challenges and technical solutions for CHP connection to the grid, as well as power quality issues and the role of the CHP plant during the restoration of power supply during the maintenance of the substation and unplanned loss of high voltage supply, are presented and discussed. Finally, the impact of prospective massive integration of CHP on the energy balance and CO2 emission reduction in the province of Vojvodina in Serbia is investigated and discussed. Since it is the first CHP plant realized in Serbia, it is crucial that experience be shared to all potential stakeholders in the future energy efficiency projects.

scholarly journals Transkingdom interactions between Lactobacilli and hepatic mitochondria attenuate western diet-induced diabetes

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Richard R. Rodrigues ◽  
Manoj Gurung ◽  
Zhipeng Li ◽  
Manuel García-Jaramillo ◽  
Renee Greer ◽  
...  
Keyword(s):  
Functional Role ◽  
Reduced Glutathione ◽  
Western Diet ◽  
Data Driven ◽  
Data Driven Approach ◽  
Probiotic Strains ◽  
Host Metabolism ◽  
Harmful Effects

AbstractWestern diet (WD) is one of the major culprits of metabolic disease including type 2 diabetes (T2D) with gut microbiota playing an important role in modulating effects of the diet. Herein, we use a data-driven approach (Transkingdom Network analysis) to model host-microbiome interactions under WD to infer which members of microbiota contribute to the altered host metabolism. Interrogation of this network pointed to taxa with potential beneficial or harmful effects on host’s metabolism. We then validate the functional role of the predicted bacteria in regulating metabolism and show that they act via different host pathways. Our gene expression and electron microscopy studies show that two species from Lactobacillus genus act upon mitochondria in the liver leading to the improvement of lipid metabolism. Metabolomics analyses revealed that reduced glutathione may mediate these effects. Our study identifies potential probiotic strains for T2D and provides important insights into mechanisms of their action.

scholarly journals An Indicator-Based Approach for Analysing the Resilience of Transitions for Energy Regions. Part II: Empirical Application to the Case of Weiz-Gleisdorf, Austria

Energies ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 2263 ◽  
Author(s):  
Romano Wyss ◽  
Susan Mühlemeier ◽  
Claudia Binder
Keyword(s):  
Path Length ◽  
Energy Systems ◽  
Energy System ◽  
Degree Centrality ◽  
Study Region ◽  
Regional Energy ◽  
Stabilization Phase ◽  
Full Picture ◽  
Regional Energy Systems

In this paper, we apply an indicator-based approach to measure the resilience of energy regions in transition to a case study region in Austria. The indicator-based approach allows to determine the resilience of the transition of regional energy systems towards higher shares of renewables and potentially overall higher sustainability. The indicators are based on two core aspects of resilience, diversity and connectivity. Diversity is thereby operationalized by variety, disparity and balance, whereas connectivity is operationalized by average path length, degree centrality and modularity. In order to get a full picture of the resilience of the energy system at stake throughout time, we apply the measures to four distinct moments, situated in the pre-development, take-off, acceleration and stabilization phase of the transition. By contextually and theoretically embedding the insights in the broader transitions context and empirically applying the indicators to a specific case, we derive insights on (1) how to interpret the results in a regional context and (2) how to further develop the indicator-based approach for future applications.

scholarly journals English for European Communication and Tourism: Focus on Pragmatic Competence

2019 ◽  
Vol 17 (3) ◽  
pp. 317-332
Author(s):  
Agata Klimczak-Pawlak
Keyword(s):  
Cross Cultural ◽  
Data Driven ◽  
Pragmatic Competence ◽  
The European Union ◽  
Cultural Perspective ◽  
Language Background ◽  
Actual Usage ◽  
Successful Communication ◽  
Data Driven Approach

Pragmatic competence in L2 English is claimed here to be crucial for successful communication in a variety of communicative contexts across Europe. However, due to language background, cultural and identity differences among users of English, there is a need for reflection and data-driven examination of how the language is used in specific situations. This paper adopts a cross-cultural perspective on the study of the use of English in the European Union with focus on its role in tourism. The role of English as the language of communication in Europe is discussed, followed by a proposal as to the way in which its actual usage can be studied. The data-driven approach to pragmatic behavior is advocated as the basis for the development of pragmatic competence in learners of English with focus on those who wish to engage in tourism.

scholarly journals Role of the national energy system modelling in the process of the policy development

2012 ◽  
Vol 16 (3) ◽  
pp. 703-715 ◽  
Author(s):  
Matevz Pusnik ◽  
Boris Sucic ◽  
Andreja Urbancic ◽  
Stane Merse
Keyword(s):  
System Analysis ◽  
Renewable Energy Sources ◽  
Research Work ◽  
Calculated Data ◽  
Energy Systems ◽  
Energy System ◽  
Alternative Possibilities ◽  
System Modelling ◽  
Small Energy ◽  
New Approach

Strategic planning and decision making, nonetheless making energy policies and strategies, is very extensive process and has to follow multiple and often contradictory objectives. During the preparation of the new Slovenian Energy Programme proposal, complete update of the technology and sector oriented bottom up model of Reference Energy and Environmental System of Slovenia (REES-SLO) has been done. During the redevelopment of the REES-SLO model trade-off between the simulation and optimisation approach has been done, favouring presentation of relations between controls and their effects rather than the elusive optimality of results which can be misleading for small energy systems. Scenario-based planning was integrated into the MESAP (Modular Energy System Analysis and Planning) environment, allowing integration of past, present and planned (calculated) data in a comprehensive overall system. Within the paper, the main technical, economic and environmental characteristics of the Slovenian energy system model REES-SLO are described. This paper presents a new approach in modelling relatively small energy systems which goes beyond investment in particular technologies or categories of technology and allows smooth transition to low carbon economy. Presented research work confirms that transition from environment unfriendly fossil fuelled economy to sustainable and climate friendly development requires a new approach, which must be based on excellent knowledge of alternative possibilities of development and especially awareness about new opportunities in exploitation of energy efficiency and renewable energy sources.

Case Study - “Can You See Me?”

2012 ◽  
pp. 804-815
Author(s):  
Anne DiPardo ◽  
Mike DiPardo
Keyword(s):  
Virtual Teams ◽  
Fine Tuning ◽  
Working Relationships ◽  
Functional Requirements ◽  
Virtual Collaboration ◽  
Geographically Dispersed ◽  
History Of ◽  
Written Word

This chapter presents a case study detailing how geographically dispersed software developers employ writing in the process of creating and troubleshooting products for use in the healthcare industry. It focuses particularly on their efforts to arrive at language that unambiguously reflects functional requirements and optimal design principles. After a brief history of the company and the evolution of its national and international virtual collaboration practices, the authors turn to the role of text across particular task cycles, exploring the uses of writing in generating, designing, and refining plans and products. Focusing on a series of three composing sequences, the authors highlight the incremental process by which the team moves toward a shared sense of understanding and linguistic precision. They argue that in contrast to common conceptions of texts as simple containers for preformed ideas, these episodes provide a more nuanced picture, as writing comes to play a central role in constituting and fine-tuning meaning and in maintaining strong working relationships throughout the processes of developing and refining products. They close with implications for preparing diverse virtual teams for participation in tasks that demand exacting uses of the written word.

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