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Oliver Ruhnau

@oliverruhnau

Assistant Professor for Energy Market Design @UniCologne | Reserach Scientist @EWI Energy Economics Institute | Previously Centre for Sustainability @HertieSchool

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31.10.2023
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Latest posts by Oliver Ruhnau @oliverruhnau

Enjoy the read and we are looking forward to your questions and feedback πŸ’‘

08.04.2024 09:49 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

3) H2 modelers should make the omission or overestimation of portfolio effects transparent when investigating individual locations or entire regions.

08.04.2024 09:48 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

2) H2 policymakers should consider potential discrimination against small H2 producers (without access to diverse portfolios) when regulating temporal matching.

08.04.2024 09:48 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

We draw the following conclusions:
1) H2 producers should diversify their renewable generation portfolio under strict temporal matching requirements.

08.04.2024 09:47 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Regional diversification yields 3-7% for 2 locations and increase with the number of locations (see figure).
For a Germany-wide aggregation, portfolio effects increase to 14-21% (see full paper).

08.04.2024 09:46 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Technological diversification, i.e., a combination of wind and solar, at one location brings the greatest portfolio effects (36% in the exemplary graph).

08.04.2024 09:45 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

In our new working paper, we show that if (and only if) temporal matching is required, market participants with more diverse portfolios can produce green hydrogen more cheaply than those with less diverse portfolios.

08.04.2024 09:45 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Temporal matching between H2 production and contracted renewable electricity has been discussed and implemented, e.g., in the context of the EU RED and the US IRA.
Previous studies investigating H2 matching use different assumptions on regional aggregation.
What does that imply?

08.04.2024 09:44 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Portfolio Effects in Green Hydrogen Production Under Temporal Matching Requirements This article investigates temporal matching requirements for green hydrogen. While previous studies found that a more granular matching increases production cos

New Working Paper:
Portfolio Effects in Green Hydrogen Production Under Temporal Matching Requirements
By Nieves Casas, Reinhard Madlener, and me
Link to full paper: papers.ssrn.com/sol3/papers....
Short summary below πŸ‘‡

08.04.2024 09:44 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

You were right, @plehmann.bsky.social, the plot in my earlier post was wrong. Here is the right one. Thank you for making me aware :)

23.02.2024 06:13 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Recent German survey on accepting onshore wind turbines in residential environment:

Without existing turbines (left), the majority has no or small concerns wrt new projects (27 and 41%)

With existing turbines (right), the majority fully or tendentially support them (44 and 36%)

23.02.2024 06:12 πŸ‘ 6 πŸ” 1 πŸ’¬ 2 πŸ“Œ 0
Preview
EWI Doctoral Fellowship – Stipend for Research in Energy Economics β€” EWI

We are offering stipends for a PhD in energy economics βš‘οΈπŸ“ˆπŸŽ“

Beyond πŸ’°, you would benefit from an inspiring environment @WiSoUniCologne and @ewi_koeln and become part of a highly motivated and capable team β˜€οΈπŸŒ¬οΈπŸ”‹

More info and application by 31 March: www.ewi.uni-koeln.de/en/news/ewi-...

20.02.2024 09:53 πŸ‘ 5 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0
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Dynamic electricity tariffs

In Germany, I often hear that, even with smart meters and dynamic tariff offerings in place, not many consumers would choose them.

Norway is an impressive counterexample: >90% of households are on spot tariffs

19.02.2024 09:15 πŸ‘ 6 πŸ” 3 πŸ’¬ 2 πŸ“Œ 0
Preview
Environmental and Resource Economics | Volume 87, issue 2 Volume 87, issue 2 articles listing for Environmental and Resource Economics

Interested in externalities of renewable energy?

Check out this (mostly open-access) special issue in Environmental and Resource Economics @SpringerEnviro, edited by @plehmann.bsky.social and Brett Day, to which we had the honor to contribute:

link.springer.com/journal/1064...

09.02.2024 06:15 πŸ‘ 5 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0

Source: https://www.fachagentur-windenergie.de/veroeffentlichungen/ausbauentwicklung/

25.01.2024 13:21 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Germany keeps falling short of government targets for onshore wind deployment.

But these trends are really promising:

+48% in newly installed capacity
+78% in newly permitted capacity

25.01.2024 13:21 πŸ‘ 35 πŸ” 10 πŸ’¬ 1 πŸ“Œ 0
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Quo vadis EU ETS price?

Nice up-to-date synthesis by Pahle et al. from PIK as part of the Ariadne project

https://ariadneprojekt.de/media/2023/12/Ariadne-Documentation_ETSWorkshopBruessel_December2023.pdf

06.01.2024 08:45 πŸ‘ 11 πŸ” 5 πŸ’¬ 1 πŸ“Œ 0

13 GW is much less than some very old studies I know:
- Nicolosi 2012 observed DE power prices dropping below zero at 20-30 GW
- FGH et al. 2012 found that 25 GW are needed for system security

Has someone seen more recent analyses on this topic?

04.01.2024 10:18 πŸ‘ 6 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

High start-up costs may prevent plants from ramping down, but unlikely for 38h in a row, I think.

Other reasons for must-run:
1) Grid services: balancing & redispatch
2) Combined heat and power (CHP)
3) Ill-designed support schemes (for biomass and CHP)

04.01.2024 10:18 πŸ‘ 6 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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New evidence on "must-run" electricity generation in Germany

When power prices dropped to zero and below for 38 hours in a row at Christmas, 13 GW of controllable generators remained online

(5 bio, 3.4 lignite, 2.8 gas, 1.4 coal, 0.4 oil)

What are the reasons?

04.01.2024 10:18 πŸ‘ 12 πŸ” 4 πŸ’¬ 2 πŸ“Œ 0
Preview
ENERDAY 2024 - 18th International Conference on Energy Economics and Technology ​ ​ Exploring Energy Demand Dynamics Friday, 12th April 2024 Technische UniversitΓ€t Dresden, Dresden, Germany The upcoming 18th ENERDAY is focused on the topic β€œExploring Energ...

Deadline: 12-Feb-2024
ENERDAY, Dresden
12-Apr-2024
enerday.ee2.biz

03.01.2024 08:54 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
IEW | International Energy Workshop The International Energy Workshop (IEW) is one of the leading conferences for the international energy modeling research community. It provides a venue for analysts to compare quantitative energy pro...

Deadline: 1-Feb-2024
IEW International Energy Workshop, Bonn
26-Jun-2024
www.internationalenergyworkshop.org

03.01.2024 08:53 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Welcome to EAERE 2024! 29th Annual Conference of the European Association of Environmental and Resource Economists - Leuven, Belgium, 1-4 July 2024

Deadline: 31-Jan-2024
EAERE Annual Conference, Leuven
01-Jul-2024
www.eaere-conferences.org/index.php?y=...

03.01.2024 08:52 πŸ‘ 0 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0

Deadline: 31-Jan-2024
12th Mannheim Conference on Energy and the Environment, Mannheim
13-May-2024
www.zew.de/en/events-an...

03.01.2024 08:52 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Home | Traee

Deadline: 26-Jan-2024
IAEE International Conference, Istanbul
25-Jun-2024
www.iaee2024.org.tr

03.01.2024 08:49 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
eenergy-conference - SIGENERGY International Conference on Future Energy Systems The International Conference on Future Energy Systems (ACM e-Energy) aims to be the premier venue for researchers working in the broad areas of comput...

Deadline: 26-Jan-2024
ACM eEnergy 2023, Singapore
04-Jun-2024
energy.acm.org/conferences/ee

03.01.2024 08:48 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
eem24.khas.edu.tr – EEM24 eem24.khas.edu.tr - EEM24

Deadline: 14-Jan-2024
20th European Energy Market Conference, Istanbul
10-Jun-2024
eem24.khas.edu.tr

03.01.2024 08:47 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Preview
CESifo Area Conference on Energy and Climate Economics 2024 Scientific Organizer: Maximilian Auffhammer CESifo is inviting the submission of papers (or extended abstracts) for the annual conference of the CESifo Area on Energy and Climate Economics. Submissio...

Deadline: 8-Jan-2024
CESifo Area Conference on Energy and Climate Economics, Munich
15-Mar-2024
www.cesifo.org/en/event/202...

03.01.2024 08:46 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

The new year begins with a series of conference submission deadlines πŸŽ‰πŸŽ“

Here is a 🧡 with those related to energy economics and markets πŸ‘‡

03.01.2024 08:46 πŸ‘ 9 πŸ” 3 πŸ’¬ 1 πŸ“Œ 1
Preview
Accurate and scalable representation of electric vehicles in energy system models: A virtual storage... The growing number of electric vehicles (EVs) will challenge the power system, but EVs may also support system balancing via smart charging. Modeling …

Here is the link to the (open-access) article: www.sciencedirect.com/science/arti...

12.12.2023 10:53 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0