References of "Applied Energy"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailHow did the German and other European electricity systems react to the COVID-19 pandemic?
Halbrügge, Stephanie; Schott, Paul; Weibelzahl, Martin et al

in Applied Energy (2021), 285

The first wave of the COVID-19 pandemic led to decreases in electricity demand and a rising share of Renewable Energy Sources in various countries. In Germany, the average proportion of net electricity ... [more ▼]

The first wave of the COVID-19 pandemic led to decreases in electricity demand and a rising share of Renewable Energy Sources in various countries. In Germany, the average proportion of net electricity generation via Renewable Energy Sources rose above 55% in the first half of 2020, as compared to 47% for the same period in 2019. Given these altered circumstances, in this paper we analyze how the German and other European electricity systems behaved during the COVID-19 pandemic. We use data visualization and descriptive statistics to evaluate common figures for electricity systems and markets, comparing developments during the COVID-19 pandemic with those of previous years. Our evaluation reveals noticeable changes in electricity consumption, generation, prices, and imports/exports. However, concerning grid stability and ancillary services, we do not observe any irregularities. Discussing the role of various flexibility options during the COVID-19 pandemic, a relatively higher grid capacity resulting from a decreased electricity consumption, in particular, may have contributed to grid stability. [less ▲]

Detailed reference viewed: 53 (4 UL)
Full Text
Peer Reviewed
See detailIndustrial demand-side flexibility: A key element of a just energy transition and industrial development
Heffron, Raphael; Körner, Marc-Fabian; Wagner, Jonathan et al

in Applied Energy (2020)

In many countries, industry is one of the largest consumers of electricity. Given the special importance of electricity for industry, a reliable electricity supply is a basic prerequisite for further ... [more ▼]

In many countries, industry is one of the largest consumers of electricity. Given the special importance of electricity for industry, a reliable electricity supply is a basic prerequisite for further industrial development and associated economic growth. As countries worldwide transition to a low-carbon economy (in particular, by the development of renewable energy sources), the increasing fluctuation in renewable energy production requires new flexibility options within the electricity system in order to guarantee security of supply. It is advanced in this paper that such a flexibility transition with an active participation of industry in general has unique potential: It will not only promote green industrial development, but also become an engine for inclusive industrial development and growth as well as delivering a just transition to a low-carbon economy. Given the high potential of industrial demand-side flexibility, a first monitoring approach for such a flexibility transition is illustrated, which bases on a flexibility index. Our flexibility index allows for an indication of mis-developments and supports an appropriate implementation of countermeasures together with relevant stakeholders. Hence, it holds various insights for both policy-makers and practice with respect to how industrial demand-side flexibility can ensure advances towards an inclusive, just, and sustainable industrial development. [less ▲]

Detailed reference viewed: 84 (7 UL)
Full Text
Peer Reviewed
See detailOne Rate Does Not Fit All: An Empirical Analysis of Electricity Tariffs for Residential Microgrids
Fridgen, Gilbert UL; Kahlen, Micha; Ketter, Wolfgang et al

in Applied Energy (2018), 210

Residential microgrids are poised to play an important role in future distributed energy networks. However, energy retailers have yet to identify effective electricity tariffs to incorporate residential ... [more ▼]

Residential microgrids are poised to play an important role in future distributed energy networks. However, energy retailers have yet to identify effective electricity tariffs to incorporate residential microgrids into the energy value chain. For this reason, we have chosen to analyze a set of twelve representative tariff options retailers might offer in the future. To examine their effects on load profiles and electricity bills, we set up a comprehensive empirical evaluation framework. Our analyses identify three important recommendations for residential microgrid pricing: First, energy retailers should not offer volumetric tariffs as they result in higher electricity bills, encourage sharp peak loads, and fail to fully allocate system costs. Second, they should also be cautious in offering time-varying and especially real-time rates. Although these rates promise slightly lower energy bills for microgrid operators, they can destabilize load profiles if retailers fail to simultaneously introduce peak-moderating capacity charges. Third, energy retailers should consider tariffs with capacity and customer charges, which we find to lower electricity costs, foster peak shaving, and facilitate stable cost allocation. [less ▲]

Detailed reference viewed: 33 (2 UL)
Full Text
Peer Reviewed
See detailA data-driven methodology to support pump performance analysis and energy effiency optimization in wastewater treatment plants
Torregrossa, Dario; Hansen, Joachim UL; Hernandez-Sancho, Francesc et al

in Applied Energy (2017), 208

Studies and publications from the past ten years demonstrate that generally the energy efficiency of Waste Water Treatment Plants (WWTPs) is unsatisfactory. In this domain, efficient pump energy ... [more ▼]

Studies and publications from the past ten years demonstrate that generally the energy efficiency of Waste Water Treatment Plants (WWTPs) is unsatisfactory. In this domain, efficient pump energy management can generate economic and environmental benefits. Although the availability of on-line sensors can provide high-frequency information about pump systems, at best, energy assessment is carried out a few times a year using aggregated data. Consequently, pump inefficiencies are normally detected late and the comprehension of pump system dynamics is often not satisfactory. In this paper, a data-driven methodology to support the daily energy decision-making is presented. This innovative approach, based on fuzzy logic, supports plant managers with detailed information about pump performance, and provides case-based suggestions to reduce the pump system energy consumption and extend pump life spans. A case study, performed on a WWTP in Germany, shows that it is possible to identify energy inefficiencies and case-based solutions to reduce the pump energy consumption by 18.5%. [less ▲]

Detailed reference viewed: 48 (0 UL)
Full Text
Peer Reviewed
See detailEstimating the benefits of cooperation in a residential microgrid: a data-driven approach
Fridgen, Gilbert UL; Rieger, Alexander UL; Thummert, Robert et al

in Applied Energy (2016), 180

Detailed reference viewed: 49 (4 UL)