We have noticed that the new release of pyomo has greatly increased the calculation time within solph.
A hotfix to this requires manual downgrading to 5.7.2 of pyomo.
2021-05 user meeting: retrospective
In 2021 the third oemof meeting was held… online. Again 🙁 But we broke two records this meeting! First: 51 participants joined the sessions this meeting. Second record: This meeting was set up within 1 1/2 weeks (phew). Our speed-‘dating’ presentations included 11 upcoming projects and models from our community. Our this years social event contained Powerpoint-Karaoke where the future strategy of oemof was presented. Including: CryptoKitties, the generic formula for PROFIT! and our first oemof space project proposal! To have a peek on those, contact us 😉
Countdown: oemof User Meeting Spring 2021
Two days only until the third digital oemof meeting: Starting on Wednesday, 5th of May, users and developers are invited to participate and share their experience with the oemof community. The meeting will be held online via BigBlueButton.
A preliminary schedule has been drafted and is available on our GitHub Wiki page. You can still register via the Etherpad and, for example, line up to pitch your project to exchange ideas and get feedback from the community.
- Registration & Topic collection: Etherpad
- Preliminary Schedule: GitHub Wiki page
- Meeting link: BigBlueButton
We look forward to seeing you!
Join the oemof User Meeting of Spring 2021 (online)
In less than three weeks, the next digital oemof meeting is scheduled. From May 5th to May 7th you can join tutorials, show and discuss your own models and share your experience with the oemof community.
To register, simply add your name and/or GitHub handle in the participants list in the respective etherpad. We invite you to add your own topics until May 2nd. A schedule will be drafted and continuously updated based on your feedback and suggestions. We will keep you informed on technical details (platform, meeting link, etc.) with the next post on oemof.org and in the etherpad.
If you have any trouble or questions, you can reach out via our contact-form.
TESPy v0.4.0 – Gibb’s Gallery and more
A new major version of TESPy has been published. The releases Gibb’s Gallery and User’s Universe feature major improvements in the software.
A new major version of TESPy has been published. The releases Gibb’s Gallery and User’s Universe feature major improvements in the software, amongst others:
- Automatic documentation of your TESPy model with LaTeX. Examples are available in the oemof_examples repository, e.g. this report.
- Generic user defined equations enhancing the flexibility in modelling.
- Generic exergy analysis tool.
- Export of fluid property data in a format, that can directly be used for generation of states diagrams in fluprodia.
On top of that, the core of the TESPy components has been reworked to lower the access barriers for new developers.
The new version also comes with an new API, therefore minor changes in your model will be necessary. Read about all changes necessary in the release notes of Gibb’s Gallery and the release notes of User’s Universe. You will find all new features available in those notes, too.
Snippet of the automatic model documentation 
Displaying a simple heat pump in Ts-diagram
New web page online
We are about to move oemof.org to a new web space. To allow for a smooth transition, the new page (this one) is already on-line. So, hopefully, the posts announcing the transitions here and there (at the old site) will be the mayor signs of the relocations. But there is more:
- Improved control: By doing more on our own, we have more flexibility on what we do. Several times already, we came to the point that we wanted to implement something for the page but were not able to because of our web page plan. This will be different from now on.
- Improved data protection: The first thing we use our newly gained power for, is sniping of the trail of your data to third parties. Also, hosting has moved from the US to Europe.
- More to come: This is not planned to be a relaunch but a smooth transition. Honestly, I would not even write this if I did not have to test the post notification mailer.
2020-12 dev meeting retrospective
2020 – what a year – the second digital meeting was held in the internet 😉 We had more than 20 participants. The establishment of the oemof foundation is nearing completion. In this year’s social event a neighbourhood board game App was played in the Alpha. Due to the many bugs the challenge became a last-man-standing (winner: Patrik).
Join the oemof developer meeting 2020 (online)
Dear oemof-community,
the timetable of next oemof developer meeting from Wednesday the 2nd to Friday the 4th of December 2020 has been set up!
You are cordially invited to take part.
Please register by writing your name in the wiki, or by adding a short comment in the issue. If you are only interested in a few session, please also indicate that in your comment, or write your name directly to the sessions.
The link for the virtual conference room:
https://bbb.zfn.uni-bremen.de/b/uwe-cgt-coo-yn2
We look forward to seeing you!
oemof developer meeting December 2020
The next oemof developer meeting will be held from Wednesday the 2nd to Friday the 4th of December 2020. It will be an online event full of virtual workshops and discussions about technical and organisational aspects of oemof. One topic will be the current status of the “oemof foundation” (working title), which is planned be incorporated at the next in-person meeting.
Anyone who is interested is cordially invited to participate and to contribute topics. All topics including additional information will be collected at the oemof organisation wiki page for the 2020 December Meeting. If you want to register, please contact us in the according ticket at GitHub. You can also suggest additional topics at the same place, we will continue shaping the agenda based on your input at least until the 23rd of November.
DHNx (v0.0.1) – Gorgeous Grids
We just published the first release of DHNx!
With DHNx, we introduce a package for district heating network optimization and simulation models.
The aim of DHNx is to develop a library for the planning and modelling of district heating network systems. The package has two main features: the optimization (routing and sizing) of district heating network systems, and the hydraulic and thermal simulation of a district heating network with given pipe diameters.
Examples can be found here here.