What's new?

September 10, 2021

Bring simulation into web: sim.tlk

From expert software to simulation in the browser – Bring Simulation into Web!

With sim.TLK we have developed a user-friendly environment, which allows you to simulate your models online. Models based on the FMI standard can be quickly made available to all users in appealing web tools. An exchange is now very easy. Just log in and simulate! Whether tablet or laptop is not important. No installation of software and no problems with updates! You can learn more about this in this blog article, or simply contact us.

September 2, 2021

Job Offer: Digital engineer at TLK

Are you looking for a job as a digital engineer? Do you want to use state-of-the-art simulation and modeling tools to solve interesting tasks?
We simulate thermal, process and energy systems and help our customers to develop and improve their products and processes. We are looking forward to your application.

August 25, 2021

Validation building simulation

Konstantina Xanthopoulou wrote her Master thesis with us and in cooperation with the E.ON Energy Research Center. In this course she compared our buildings library TDA (based on Aixlib) with other programs for building simulation. Here you can see the results regarding the heating and cooling performance under the same boundary conditions. Despite the simplicity of TDA we could achieve good results, which hardly differ from far more complex simulation programs.
Published in "Energy and Buildings Volume 250: Validation of a building model as part of the AixLib Modelica library for dynamic plant and building performance simulations".

August 20, 2021


Work from the office and work from home, or wherever you are... We are now completely convinced of the combination! It's nice to be flexible and not always have to go to the office. But it's just as nice to be able to go back to the office before you get cabin fever 😊.

August 11, 2021

Refrigeration cycle in a heatpump?

Refrigeration cycle in a heatpump?
This question initially confuses people who are not very familiar with heat pumps. Manuel will help you understand. 😃 In his blog article he manages to explain the basic mechanisms in a simple and understandable way, so that you can place the topic of heat pumps in the larger context of refrigeration technology. Curious?

August 3, 2021

Meet the Team: Vu Phong Nguyen

Phong has completed his master's degree in energy engineering at RWTH Aachen University. With his work, he would like to contribute to the energy transition. In his free time, he is interested in photography and power sports. Welcome to the team!

July 28, 2021

Simulation library process engineering: Calculation of fluid mixtures

We developed a process systems library (PSL) to study the transient behavior of chemical reactors, distillation columns, and absorption heat pumps. Your advantage: Various thermodynamic property packages for multiphase fluid mixtures including KBCs Multiflash™.
Which process engineering system would you like to simulate? We are open to cooperation and would like to develop the PSL further based on your requirements. Just contact us for a free trial license.

July 14, 2021

Free interactive McCabe-Thiele diagram

Pascal has developed an interactive McCabe-Thiele diagram, which we provide free of charge and without registration. With this diagram from process engineering the theoretical number of separation stages of a column can be determined. How many stages are needed depends on many factors: What is the separation factor of my mixture? What degree of purity is to be achieved? What is the Murphree efficiency and the reflux ratio?
We would appreciate feedback and would be happy to develop the diagram further if it meets interest. 😃

July 9, 2021

Meet the Team: Valentin Salgado Fuentes

Valentin, originally from Ecuador, is doing his PhD at the Technical University of Denmark. As part of his doctorate, he is supposed to spend some time abroad at a company. With the topic of control strategies for heatpumps, he is right at place with us. Great to have you here Valentin!

July 5, 2021

Modelica and TIL Training also for America

Become an expert in Modelica! This time we organize the Online Training in the afternoon (CEST). The training is therefore also suitable for simulation enthusiasts from North America 😉. We start with the basics and build a solid foundation step by step, so that you are able to work on your own projects afterwards. Due to a small group size, individual questions can be answered.
Interested? Simply register here for the training.

June 30, 2021

Meet the Team: Sarah Leidolf

Sarah is studying industrial engineering at the RWTH University in Aachen and has her focus on energy technology. She is completing her internship with us. In her studies, the subject of thermodynamics appealed to her the most. Therefore, she is exactly right with us. Thank you for your support Sarah.

June 22, 2021

Interactive log ph Diagram: Update

Update! We have included a lot of your great and helpful feedback on the log p-h diagram in our update. Thank you very much! Now, for instance, different refrigerants can be compared with each other in terms of their COP. Try it out. If you have suggestions for improvement or would like to have your personalized interactive web tool, which does not necessarily have to be a diagram, please contact us.

June 18, 2021

Practical PID-Tunning

Tuning PID controller in practice! PI and PID controllers are the most commonly used controllers. Even though the actual control law is very simple, the selection of suitable parameters is anything but trivial. Read Manuel's new blog article about an easy-to-use tuning method.

Without control theory and no mathematically optimal results, but battled proved by many practical applications.

What is your favorite method for PID tuning?

June 15, 2021

Power-to-gas process: Methanization

Our master student Moritz worked on the design of a cooling system for the optimal dynamic operation of a methanation reactor. The optimization of the methane yield has given interesting results: For the reactor studied by him, the best results were obtained for co-current cooling with narrow cooling channel widths. This is mainly due to the improved heat transfer in turbulent flow. You would like to learn more? Just get in touch!

June 14, 2021

TIL Update: Hot water storage

Our TIL library for thermodynamic systems is under continuous development. It is compatible with the latest version of the Modelica Standard Library 4.0.0 and has been supplemented with an add-on for hot water tanks, among other improvements. Get a trial license to model and simulate the provision of hot water in buildings for heating and domestic hot water.

May 5, 2021

Meet the Team: Yann Pellny

Yann is studying mechanical engineering at RWTH Aachen University, and we are pleased that he is writing his master's thesis on "The dynamic modeling of a methanol synthesis" with us. For modeling and simulation, he will use our process system library PSL, which we are constantly developing. Yann has French roots and therefore speaks both French and German fluently. A good opportunity for all French speakers to get in touch. 😉

April 19, 2021

Future with Hydrogen

The project "Zukunftscluster Wasserstoff" is to be launched soon. The vision: an international, hydrogen-based energy economy that predominantly uses renewable energies. We have the opportunity to take a step towards a more sustainable future. The goal is to develop a complete value chain from hydrogen production, storage and distribution to the use of hydrogen technologies and market maturity. 👍

April 10, 2021

Interactive Diagram

For refrigeration systems, the log-p-h diagram is probably the most widely used graphical visualization. We use it every day in simulation projects to grasp the state of a system at one sight. For our web-based simulation apps we have developed an interactive log-p-h diagram with JavaScript. You can use it for free and create a cycle yourself. Try it out.

March 3, 2021

TIL Add-on: Hydrogen filling station

Tomorrow, people want to fill up their cars with hydrogen. Is your filling station ready?
We help you to design and optimize your facilities! No matter if liquid (LH2) or gaseous (CGH2) storage, cascading buffer tanks, direct compression and different gas tank systems (Type III, IV): We simulate it and enable you to make the right decision!l

January 7, 2021

TLK Energy App: aerosim

Window ventilation reduces the CO2 concentration and the risk of infection, but in winter it gets unbearably cold very quickly. With the online simulation app aerosim, we calculated the room air temperature. In a classroom, after just 5 minutes of window ventilation, it is close to 10°C on a typical winter day. A good argument for ventilation systems or air filters.

December 29, 2020

TIL Update: Tumble dryer

Laundry dryers are complex systems, as operating conditions are constantly changing due to the on-going drying process. Without dynamic simulation, you won't get anywhere! Fortunately, there are now ready-to-use tumble dryer models in the TIL Add-On library. Dry it out 😉 Get your demo license!

December 9, 2020

Update: TIL Add-on PCM

With the new TIL Add-On PCM you can now simulate phase change materials. Latent heat storage materials can store very large amounts of heat in a specific temperature range. With TIL you can design the optimal PCM storage for your application, e.g. hand warmers in winter. Write us to get a test license before your fingers get cold.

August 26, 2020

Project MoGaTEx: Adsorption columns

Using an online simulation tool to design adsorption columns based on small-scale experiments. This is the goal of our new project called MoGaTEx! The project is funded by the German Federal Ministry of Education and Research (Bundesministerium für Bildung und Forschung) and is carried out with partners from RWTH and 3P Instruments. Together with our associated partners Climeworks, sysadvanced, and Silica Verfahrenstechnik GmbH we want to make gas separation more energy efficient by holistic design and predictive control!

August 4, 2020

Wastewater treatment: CYKATT

Why care about wastewater? Because what looks like useless dirt is actually rich in raw materials, such as phosphorus. These treasures should be separated and the energy contained in the sewage sludge should be used. In our research project CYKATT, we investigate how energy and resource saving sewage plants can be designed in the future. CYKATT is funded by the German Federal Ministry of Education and Research and is carried out with our partners TLK-Thermo, TU Braunschweig, TU Clausthal and awama. We are happy to be part of it!

June 25, 2020

Modelica: System becomes stiff?

TIL HD can relieve your stiffness in many cases... Since almost every frequent user of Modelica knows the error message that the system is too stiff. Usually, this problem is not so easy to solve and occurs above all in highly dynamic simulations with transient boundary conditions as well as in switching processes with flow reversal and string disconnections. The TIL HD library is specialized in such cases and remains flexible. If you want to know more, just contact us!

Ready to start a new project?

Call us at +49 241 412 50 645, e-mail us to info@tlk-energy.de or find us on LinkedIn.