Newsletter April 2026

Dear Sir or Madam,

in this newsletter, you can look forward to exciting topics and up-to-date insights:

The world’s largest heat pump systems by Everllence – TLK simulates optimal operation
Electrochemical Process Engineering – TLK advances fuel cell–based aviation, redox flow batteries, and electrolysis
Webinar on new features in TIL Suite, DaVE, and MoBA using batteries as an example
Toward climate neutrality through CO₂ absorption – TLK’s new testing capabilities
TLK on site – Meet our experts at these events

The World’s Largest Heat Pump Systems by Everllence – TLK Simulates Optimal Operation

For more than 20 years, heat pumps have been a key element of our work at TLK-Thermo. In addition to their original household applications, we are increasingly expanding their use into industrial applications. In this context, we support Everllence (formerly MAN Energy Solutions) with dynamic system simulations, particularly in the development of operational and control strategies based on physical principles. The basis for this work is our comprehensive component and substance data library TIL Suite.

[Translate to English:] The logos of Everllence and TLK-Thermo GmbH symbolize the partnership

The systems and operating scenarios to be represented pose the highest demands: Extreme temperature differences when using river water as a heat source, steam generation at up to 50 bar and over 300 °C, and the ability to switch between heating and cooling for climate control in buildings. With our fast and accurate models for fluids and components, we enable dynamic simulations of multiple hydraulically and thermally coupled heat pumps within a district heating plant. Various climate-friendly refrigerants are used, including modern fluorinated options and highly sustainable natural refrigerants such as ammonia and propane.

Our expertise in the areas of:

Development, parameterization, and calibration of coupled system models
Dynamic system simulations for start-up phases, switching operations, and overall operation
Analysis and optimization of operational and control concepts – including critical trip scenarios

contributes to the successful implementation of exciting international projects, including:

One of the world’s largest river-water heat pumps (150 MW) for RheinEnergie in Cologne
The world’s largest steam heat pump (35 MW) for Boston’s district heating network
A 25 MW large-scale heat pump for the new Scout Motors electric vehicle factory

You too can benefit from our many years of experience with heat pump systems and natural refrigerants. With efficient and robust dynamic simulations, we create the foundation for the optimal operation of your large-scale heat pump systems. Feel free to contact our colleague Christian Fleßner at c.flessner@tlk-thermo.com.

Electrochemical Process Engineering – TLK Advances Fuel Cell–Based Aviation, Redox Flow Batteries, and Electrolysis

Electrochemical process engineering is a key technology for sustainable energy and material conversion across a wide range of applications. Our many years of experience in the modelling and simulation of electrochemical processes – from fuel cell systems and electrolysis systems to Power-to-X processes including carbon capture, and more recently redox flow batteries – make us experts in this field.

With our TIL Add-On Hydrogen Energy Systems, we provide an important tool for the development of electrochemical systems. At its core is our model of an electrochemical cell. Thanks to its modular structure, it can be flexibly adapted to a wide variety of electrochemical processes and expanded accordingly. The models of electrochemical energy converters can be combined with models from TIL Suite, enabling comprehensive system analyses – from initial design to optimized operation. To complement downstream processes for the production of hydrogen derivatives, the PSL from TLK Energy can be used.

With the current release, the TIL Add-On Hydrogen Energy Systems includes three new electrolysis models for PEMEL, AEMEL, and AEL. These take into account the chemical non‑equilibrium between the gas and liquid phase (two-phase flow description). Additional models enable a detailed performance analysis of a wide range of electrolysis processes and topologies.

To continuously develop our model libraries further, we actively integrate them into innovative research projects.

Within the GENtwoPRO project, we are continuing our established partnership with Airbus and other cooperation partners to advance fuel cell–based aviation together.

Our work focuses on the following topics:

Robust simulation of mission profiles at full fuel-cell system level, including realistic start/stop scenarios
Analysis of uneven distribution in multi-stack systems at stack-to-stack level

Phase-separated modelling approaches and analysis of their impact on system behavior
Analysis of selected balance-of-plant components using CFD and transferring insights into 0D/1D system simulations

In the research project Ever-VRFB, we are working to expand and improve the application possibilities of vanadium redox flow batteries (VRFBs).

For this purpose, we are developing a new Modelica-based VRFB model. Our objectives include:

Modelling stack efficiency and lifetime
Validation of the model using field data

Integration of the battery model into a building model developed by our project partners
Development of a software tool for analyzing operating strategies and system designs

Further information on both projects can be found on our Website.

Anyone wishing to exchange ideas in person with our VRFB expert Marek Bültel or our carbon capture expert Helene Geißler is welcome to meet them at the user meeting Modelica in Process Engineering on May 5 in Cologne.

Webinar on New Features in The TIL Suite, DaVE, and MoBA Using Batteries As an Example

The new releases of our in-house software products are now available. To accompany this, we are offering our next software webinar at the end of April – on April 23 in English and on April 24 in German. In this event, we will present the latest developments in TIL Suite, DaVE and MoBA Automation.

In addition, we would like to introduce our new TIL Add-On Battery for the modelling and simulation of battery thermal management systems (BTMS), including battery safety. The add-on includes the full range from easily parameterizable electrothermal stack models – for coupling with cooling systems or BTMS calculations – to highly discretized cell models, including reaction mechanisms for battery safety. During the webinar, we will discuss three intended application areas as well as our complex battery cell model and take a closer look at exemplary results.

Throughout the webinar, our software experts will be available to answer your questions.

TLK-Webinar Registration

If you are interested, you can register free of charge via the button on our webinar website. We look forward to your participation and to an engaging technical exchange!

Toward Climate Neutrality Through CO₂ Absorption – TLK’s New Testing Capabilities

In the future, CO₂ capture processes can be used to recover CO₂ for industrial processes or to remove CO₂ from the atmosphere, thereby making an important contribution to achieving climate goals.

We have therefore strategically expanded our testing portfolio to support our customers not only through model-based analyses, but also experimentally in the development and optimization of innovative CO₂ capture technologies. For example, at a new test bench we can measure the CO₂ loading of L-arginine solutions with different concentrations.

An employee at a test bench for studying CO2 absorption

For further information, please contact our colleague Norbert Stulgies directly at lab@tlk-thermo.com. From idea to implementation: we support you with customized solutions for your measurement requirements.

TLK on Site – Meet Our Experts at These Events

In 2026, we will once again be presenting our latest developments and key focus areas at international events. Don’t miss the opportunity to meet us in person, exchange ideas on current trends, and engage directly with our experts.

Catia User Symposium Europe in Darmstadt, June 16-18, 2026
Visit us at our booth and discuss the strengths and limitations of Dymola in the modelling and simulation of thermal systems with us.

An employee gives a presentation at a conference

Asian Modelica & FMI Conference 2026 in Hangzhou (China), September 21-22, 2026
Our Head of Software Development, Christian Schulze, looks forward to an in-depth technical exchange with you.

ThermoSim 2026 in Aachen, September 22-23, 2026
Our contact person for TIL, Ingo Frohböse, will demonstrate how we efficiently develop and analyze modern cooling systems for data centers using TIL Suite.

Chillventa 2026 in Nürnberg, October 13-15, 2026
Meet us together with TLK Energy at our booth 4-509 and learn how our customized test benches and software tools support the development of innovative heat pump and refrigeration technologies.

For the latest updates on our activities, you are also welcome to follow us on LinkedIn.

With innovative ideas, exciting events, and our proven expertise, we are happy to support you in bringing your projects to life. Join us in looking forward to shared successes and new opportunities in 2026.

Kind regards,
Willi Tegethoff and Niko Lemke