Junior Researcher in Techno-economic Assessment and Simulation of Heat Storage
Are you interested in the role of heat storage in our energy system? Contribute now to quantifying the economic impact of different technologies for heat storage.
Job description
In PUSH-IT we developed a unified framework for the combined or individual techno-economic assessment of heat storage and geothermal heat sources. One of the challenges for such an approach is the combination of subsurface (geological) heterogeneity and uncertainty with the performance of various technical components of the heating systems in different climatic conditions.
To address this complexity, a team of geological and technology experts work together to build a framework on open-source code (Python) that is high-performing and scalable to comprehensively quantify uncertainties using probability theory.
This is where you will contribute: in the application of the developed generic, open-source, high-performing and highly scalable framework to assess the Levelized Cost of Energy/Heat - LCOE reduction and carbon emission reduction costs (CRC) of heat storage in geothermal reservoirs in combination with different heat supply sources.
The framework we developed will be used to analyse the techno-economic performance of heat storage systems at any time interval required to capture the system dynamics as dictated by demand-side management. Input from consortium industry partners on component, operational and other costs will be used to validate the techno-economic models and quantify the risks of business case development. A strong collaboration with consortium members in industry and academia is key.
Research Context
The EU aims to have a net-zero greenhouse gas (GHG) economy by 2050. At present, heating and cooling represent around 50% of the final energy use in Europe and are mainly supplied by fossil-fuel-derived energy. Because sustainable heat is mainly available in summer and demand is high in winter, large scale seasonal heat storage is a key strategy to decarbonize heating in order to achieve EU ambitions.
TU Delft leads a large European project [PUSH-IT] that will showcase and develop full-scale application of heat storage (up to 90°C) in geothermal reservoirs using three different technologies: Aquifer, Borehole and Mine Thermal Energy Storage (ATES, BTES, MTES), at 6 different sites in Europe which together represent a relevant range of geological conditions across Europe.
LCOE generating a sustainable energy economy
Many sustainable heat supply systems are characterised by high capital expenditure and low operational costs. Therefore, an installed capacity tailored at peak demand is not cost effective, while extending the annual operation period is advantageous for meeting energy needs, reducing levelised cost of energy (LCOE) and decarbonisation.
Optimal utilisation of sustainable heat requires storing large amounts of heat to account for seasonal supply and demand fluctuations. Various technologies have been proposed for large-scale heat storage in geothermal reservoirs and low-temperature storage is routinely applied. PUSH-IT focuses on extending storage temperature ranges to high temperatures. We will tackle remaining barriers for high temperature storage, demonstrate applicability, increase public engagement, and optimise and de-risk operations.
Job requirements
- Do you have an MSc degree in a relevant field (e.g. applied earth science, engineering, thermal energy storage, etc.) and experience in using high performance code in Python (libraries : pandas, xarray, dask)?
- Do you have experience with simulation of HT-ATES in heterogeneous geothermal formations?
- Are you a team player who thrives working with people in different organisations with different skillsets, with the goal to have an impact on the energy transition?
- Does curiosity inspire you and do you have interest in subsurface heat storage?
- Are you also able to plan, execute, deliver on your planning and communicate research results through excellent written and oral communication skills in English?
Then do not hesitate to apply!
Experience with reservoir simulation, heterogeneous heat storage modelling, energy systems modelling, techno-economics is considered a plus, but we can are happy to provide support on these aspects!
TU Delft (Delft University of Technology)
Delft University of Technology is built on strong foundations. As creators of the world-famous Dutch waterworks and pioneers in biotech, TU Delft is a top international university combining science, engineering and design. It delivers world class results in education, research and innovation to address challenges in the areas of energy, climate, mobility, health and digital society. For generations, our engineers have proven to be entrepreneurial problem-solvers, both in business and in a social context.
At TU Delft we embrace diversity as one of our core values and we actively engage to be a university where you feel at home and can flourish. We value different perspectives and qualities. We believe this makes our work more innovative, the TU Delft community more vibrant and the world more just. Together, we imagine, invent and create solutions using technology to have a positive impact on a global scale. That is why we invite you to apply. Your application will receive fair consideration.
Challenge. Change. Impact!
Faculty of Civil Engineering and Geosciences
The Faculty of Civil Engineering & Geosciences (CEG) is committed to outstanding international research and education in the field of civil engineering, applied earth sciences, traffic and transport, water technology, and delta technology. Our research feeds into our educational programmes and covers societal challenges such as climate change, energy transition, resource availability, urbanisation and clean water. Our research projects are conducted in close cooperation with a wide range of research institutions. CEG is convinced of the importance of open science and supports its scientists in integrating open science in their research practice. The Faculty of CEG comprises 28 research groups in the following seven departments: Materials Mechanics Management & Design, Engineering Structures, Geoscience and Engineering, Geoscience and Remote Sensing, Transport & Planning, Hydraulic Engineering and Water Management.
Click here to go to the website of the Faculty of Civil Engineering & Geosciences.
Conditions of employment
- Duration of contract is 8 months. Temporary.
- A job of 32-38 hours per week.
- A salary based on Scale 08 of the CAO for Dutch Universities with a salary between €3382 - €4484 gross per month based on a fulltime contract (38 hours), plus 8% holiday allowance and an end-of-year bonus of 8.3%. Salary will be aligned with the candidate's experience and expertise and in line with our internal salary framework.
- An excellent pension scheme via the ABP.
- The possibility to compile an individual employment package every year.
- Discount with health insurers on supplemental packages.
- Flexible working week.
- Every year, 232 leave hours (at 38 hours). You can also sell or buy additional leave hours via the individual choice budget.
- Plenty of opportunities for education, training and courses.
- Partially paid parental leave
- Attention for working healthy and energetically with the vitality program.
Additional information
For more information about this vacancy, please contact Alexandros Daniilidis a.daniilidis@tudelft.nl.
Application procedure
Are you interested in this vacancy? Please apply no later than 26 October 2025 via the application button and upload the following documents:
- CV
- Motivational letter
You can address your application to Alexandros Daniilidis.
This position is available for candidates who hold at least an MSc degree. Candidates without a PhD degree will be considered if they can demonstrate that they have the relevant experience.
Please note:
- You can apply online. We will not process applications sent by email and/or post.
- As part of knowledge security, TU Delft conducts a risk assessment during the recruitment of personnel. We do this, among other things, to prevent the unwanted transfer of sensitive knowledge and technology. The assessment is based on information provided by the candidates themselves, such as their motivation letter and CV, and takes place at the final stages of the selection process. When the outcome of the assessment is negative, the candidate will be informed. The processing of personal data in the context of the risk assessment is carried out on the legal basis of the GDPR: performing a public task in the public interest. You can find more information about this assessment on our website about knowledge security.
- Please do not contact us for unsolicited services.