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Reinert C, Nolzen N, Frohmann J, Tillmanns D, Bardow A. Design of low-carbon multi-energy systems in the SecMOD framework by combining MILP optimization and life-cycle assessment. Comput Chem Eng 2023. [DOI: 10.1016/j.compchemeng.2023.108176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
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Pérez-Uresti SI, Lima RM, Martín M, Jiménez-Gutiérrez A. On the design of renewable-based utility plants using time series clustering. Comput Chem Eng 2022. [DOI: 10.1016/j.compchemeng.2022.108124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Weimann L, Gazzani M. A novel time discretization method for solving complex multi-energy system design and operation problems with high penetration of renewable energy. Comput Chem Eng 2022. [DOI: 10.1016/j.compchemeng.2022.107816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Schäfer P, Schweidtmann AM, Mitsos A. Nonlinear scheduling with time‐variable electricity prices using sensitivity‐based truncations of wavelet transforms. AIChE J 2020. [DOI: 10.1002/aic.16986] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Pascal Schäfer
- RWTH Aachen University AVT—Aachener Verfahrenstechnik, Process Systems Engineering Aachen Germany
| | - Artur M. Schweidtmann
- RWTH Aachen University AVT—Aachener Verfahrenstechnik, Process Systems Engineering Aachen Germany
| | - Alexander Mitsos
- RWTH Aachen University AVT—Aachener Verfahrenstechnik, Process Systems Engineering Aachen Germany
- JARA‐ENERGY Aachen Germany
- Forschungszentrum Jülich, Energy Systems Engineering (IEK‐10) Jülich Germany
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Using hydrogen and ammonia for renewable energy storage: A geographically comprehensive techno-economic study. Comput Chem Eng 2020. [DOI: 10.1016/j.compchemeng.2020.106785] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Sass S, Faulwasser T, Hollermann DE, Kappatou CD, Sauer D, Schütz T, Shu DY, Bardow A, Gröll L, Hagenmeyer V, Müller D, Mitsos A. Model compendium, data, and optimization benchmarks for sector-coupled energy systems. Comput Chem Eng 2020. [DOI: 10.1016/j.compchemeng.2020.106760] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Abstract
Due to the high degree of intermittency of renewable energy sources (RES) and the growing interdependences amongst formerly separated energy pathways, the modeling of adequate energy systems is crucial to evaluate existing energy systems and to forecast viable future ones. However, this corresponds to the rising complexity of energy system models (ESMs) and often results in computationally intractable programs. To overcome this problem, time series aggregation (TSA) is frequently used to reduce ESM complexity. As these methods aim at the reduction of input data and preserving the main information about the time series, but are not based on mathematically equivalent transformations, the performance of each method depends on the justifiability of its assumptions. This review systematically categorizes the TSA methods applied in 130 different publications to highlight the underlying assumptions and to evaluate the impact of these on the respective case studies. Moreover, the review analyzes current trends in TSA and formulates subjects for future research. This analysis reveals that the future of TSA is clearly feature-based including clustering and other machine learning techniques which are capable of dealing with the growing amount of input data for ESMs. Further, a growing number of publications focus on bounding the TSA induced error of the ESM optimization result. Thus, this study can be used as both an introduction to the topic and for revealing remaining research gaps.
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Wavelet-based grid-adaptation for nonlinear scheduling subject to time-variable electricity prices. Comput Chem Eng 2020. [DOI: 10.1016/j.compchemeng.2019.106598] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Reducing Computational Load for Mixed Integer Linear Programming: An Example for a District and an Island Energy System. ENERGIES 2019. [DOI: 10.3390/en12142825] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The complexity of Mixed-Integer Linear Programs (MILPs) increases with the number of nodes in energy system models. An increasing complexity constitutes a high computational load that can limit the scale of the energy system model. Hence, methods are sought to reduce this complexity. In this paper, we present a new 2-Level Approach to MILP energy system models that determines the system design through a combination of continuous and discrete decisions. On the first level, data reduction methods are used to determine the discrete design decisions in a simplified solution space. Those decisions are then fixed, and on the second level the full dataset is used to ex-tract the exact scaling of the chosen technologies. The performance of the new 2-Level Approach is evaluated for a case study of an urban energy system with six buildings and an island system based on a high share of renewable energy technologies. The results of the studies show a high accuracy with respect to the total annual costs, chosen system structure, installed capacities and peak load with the 2-Level Approach compared to the results of a single level optimization. The computational load is thereby reduced by more than one order of magnitude.
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