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Dieser Bericht zielt darauf ab, Pfade zu bewerten und Empfehlungen für die Transformation des Schweizer Energiesystems zu formulieren, die notwendig sind, um das vom Bundesrat festgelegte Ziel von netto null Treibhausgasemissionen (THG) bis 2050 (BFE 2017a) unter Berücksichtigung des Pariser Klimaabkommens zu erreichen. Wir untersuchen die Rolle und die Auswirkungen des nationalen Energiesystems, definieren die wichtigsten zukünftigen Herausforderungen und formulieren eine ganzheitliche Strategie, um diese zu bewältigen., Boulouchos K, Neu U et al. (2022) Schweizer Energiesystem 2050: Wege zu netto null CO2 und Versorgungssicherheit. Kurzfassung. Swiss Academies Reports 17 (3)

Dieser Bericht zielt darauf ab, Pfade zu bewerten und Empfehlungen für die Transformation des Schweizer Energiesystems zu formulieren, die notwendig sind, um das vom Bundesrat festgelegte Ziel von netto null Treibhausgasemissionen (THG) bis 2050 (BFE 2017a) unter Berücksichtigung des Pariser Klimaabkommens zu erreichen. Wir untersuchen die Rolle und die Auswirkungen des nationalen Energiesystems, definieren die wichtigsten zukünftigen Herausforderungen und formulieren eine ganzheitliche Strategie, um diese zu bewältigen., Boulouchos K, Neu U et al. (2022) Schweizer Energiesystem 2050: Wege zu netto null CO2 und Versorgungssicherheit. Grundlagenbericht. Swiss Academies Reports 17 (3)

Le rapport de la Commission élargie de l’énergie des Académies suisses des sciences fait le point sur la situation actuelle de l’approvisionnement énergétique de la Suisse et formule des recommandations permettant au système énergétique de fonctionner sans émission nette de CO2 d’ici 2050. Cet objectif a été fixé par le Conseil fédéral, conformément à l’Accord de Paris sur le climat ratifié par la Suisse. L’objectif zéro émission nette de CO2 signifie que les émissions qui ne peuvent être évitées soient compensées en éliminant les gaz à effet de serre de l’atmosphère par des moyens techniques ou de manière naturelle par le reboisement. A cela s’ajoute le fait que la population suisse s’est prononcée en 2017 en faveur d’une sortie progressive du nucléaire., Boulouchos K, Neu U et al. (2022) Système énergétique suisse 2050 : pistes pour assurer le « zéro émission nette » de CO2 et la sécurité de l'approvisionnement. Rapport de synthèse. Swiss Academies Reports 17 (3)

This report aims at assessing pathways and formulating recommendations for the transformation of the Swiss energy system necessary to achieve the net zero greenhouse gas (GHG) emission target by 2050 (BFE 2017a) set by the Federal Council taking into account the Paris climate agreement. We examine the role and impact of the national energy system, define the main future challenges and formulate a holistic strategy to address them., Boulouchos K, Neu U et al. (2022) Swiss Energy System 2050: Pathways to Net Zero CO2 and Security of Supply. Basic report. Swiss Academies Reports 17 (3)

Electrification of residential's heating and private mobility is often seen as a cure-all solution to the sector's immense greenhouse gas (GHG) emission problem. However, the necessary supply of affordable, secure, and sustainable centralized electricity is commonly assumed unlimited in related planning efforts. Hence, it remains unclear how beneficial electrification is under limited supply. Therefore, we investigate how jointly planned de-/centralized asset upgrades and Vehicle-2-Home enabled electric vehicles can overcome such limitations exemplarily for five residential building types in Switzerland. Thereto, the proposed, novel optimizations of Multi-energy Systems based on the Energy Hub concept, which extend the classical decentralized Energy Hub perspective to include investments into centralized assets, simultaneously select, design, and operate such assets and vehicles to minimize lifecycle-emissions and -costs while covering thermal, electrical and mobility demands under scenarios of A) unlimited, B) three partially limited, and C) no (stand-alone) centralized electricity. The optimizations prove the centralized supply limitations to be crucial, as achievable CO2eq mitigations halve on average from A) >60% over B) 45% to only C) 30%. Further, a substantially altered and wide mix of assets is optimal to overcome the identified sole supply bottleneck of electrical energy scarcity during winter. Transitioning from low-cost to low-emission solutions, natural gas based centralized gas turbines and decentralized combined heat and power plants (CHPPs) combined with air-source heat pumps are displaced by biogas CHPPs, ground source heat pumps and centralized photovoltaics, while local photovoltaics and Vehicle-2-Home usage are constants. Surprisingly, all partially limited scenarios including nuclear phase-out and additional cross-border electricity trade stops yield similar results, which enable emission mitigations of 50% over the non-electrified reference without additional annualized cost. Stronger emission mitigation proves prohibitively costly. Overall, considering limited supply avoids overestimation of achievable emission mitigation, underestimation of total costs as well as identification of too simplistic asset portfolios., Advances in Applied Energy, 5, ISSN:2666-7924

the present White Paper aims at providing a holistic view of the mobility system, encompassing several sectors, including long-haul transport modes, which can be expected to become much more important in contributing to the overall energy demand and greenhouse gas emissions in the future. Based on this, we examine best ways to address the above mentioned challenges, point out actions that must be taken with priority and derive recommendations for key stakeholders in the area., White Paper