scholarly journals Interaction of hydrogen infrastructures with other sector coupling options towards a zero-emission energy system in Germany

Author(s):  
Hans-Christian Gils ◽  
Hedda Gardian ◽  
Jens Schmugge
2011 ◽  
Vol 54 (12) ◽  
pp. 3296-3303 ◽  
Author(s):  
Yun Wang ◽  
JunYing Zhang ◽  
YongChun Zhao ◽  
ZhongYuan Li ◽  
ChuGuang Zheng

Energy ◽  
2021 ◽  
Vol 220 ◽  
pp. 119709
Author(s):  
M.S. Islam ◽  
Barun K. Das ◽  
Pronob Das ◽  
Md Habibur Rahaman

Author(s):  
Wolfgang Sanz ◽  
Martin Braun ◽  
Herbert Jericha ◽  
Max F. Platzer

A modern energy system based on renewable energy like wind and solar power inevitably needs a storage system to provide energy on demand. Hydrogen is a promising candidate for this task. For the re-conversion of the valuable fuel hydrogen to electricity a power plant of highest efficiency is needed. In this work the Graz Cycle, a zero emission power plant based on the oxy-fuel technology, is proposed for this role. The Graz Cycle originally burns fossil fuels with pure oxygen and offers efficiencies up to 65 % due to the recompression of about half of the working fluid. The Graz Cycle is now adapted for hydrogen combustion with pure oxygen so that a working fluid of nearly pure steam is available. The changes in the thermodynamic layout are presented and discussed. The results show that the cycle is able to reach a net cycle efficiency based on LHV of 68.5 % if the oxygen is supplied “freely” from hydrogen generation by electrolysis. An additional parameter study shows the potential of the cycle for further improvements. The high efficiency of the Graz Cycle is also achieved by a close interaction of the components which makes part load operation more difficult. So in the second part of the paper strategies for part load operation are presented and investigated. The thermodynamic analysis predicts part load down to 30 % of the base load at remarkably high efficiencies.


2021 ◽  
Author(s):  
Schrutir Jain ◽  
Maarten Arentsen ◽  
Albert Molderink

Abstract Climatic changes have made transition to renewable energy essential. However, energy transition in the globalized world is challenged with diversification in culture, economic prowess, social development, and state structure. The global negotiations are always tough, among others, due to the split between the Global North (GN) and Global South (GS) countries. At the same time, the debates on how to deal with the inequalities in climate mitigation potential veils a thus far hardly acknowledged difference in energy transition potential and impact in the GN and GS countries. This paper, therefore, aims to contribute to bridging this knowledge gap by making a systematic comparative assessment of energy transition potential in the GN and GS with two regions as example cases. We analysed and compared energy scenarios in two regions in the world: Overijssel representing the GN countries and Matura representing the GS south countries. Both regions are similar in economic activities, but differ in demography and economic development. We analysed and compared the current energy system in both regions and two development scenarios towards 2050: the BAU scenario and the zero emission scenario. Despite the differences in starting position, the energy systems in both regions move towards each other in the longer term, but change pattern and costs differ. In both regions bioresources are the dominant renewable resource in an locally determined energy resource portfolio. However, the costs of getting into this longer term position are significantly higher in Matura than in Overijssel, whereas the general economic potential, as it looks in 2020, is worse in Matura. Our analysis therefore indicates that a renewable energy transition in the longer term can result in zero emission systems in both GN and GS countries, but with substantial differences in costs.


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