CFD and experimental based study of TPMS based heat exchanger for solar applications

Background

Concentrated solar power (CSP) is becoming an important source of clean energy in Europe’s push to decarbonize electricity. Using air instead of liquids in CSP systems cuts costs, avoids toxic or corrosive fluids, saves water, and works well over a wide temperature range, but it comes at the cost of poor heat transfer.

Adding triply periodic minimal surfaces (TPMS) can further improve air-based heat exchangers. TPMS are intricate, zero-curvature 3D structures that offer a high surface area for heat transfer. They enhance fluid mixing and heat exchange while keeping pressure drops low. Interest in TPMS has grown recently, especially for heat-exchanger applications.

Objective and goals

The primary objective of the thesis is to design, simulate and test a TPMS-based Heat Exchanger to determine optimum thermo-hydraulic performance.

Methodology

Through a literature review of existing design cases available from the literature of TPMS based heat exchangers involving different heat transfer fluids such as air, initial and boundary conditions are to be identified. Simulations on selected geometries are to be performed using commercial licensed CFD packages such as ANSYS Fluent or likewise.

• A CAD model (simplification) is to be developed for the numerical simulations based on a range of optimum geometric parameters.

• A comprehensive CFD study is to be formulated relating to investigation of boundary conditions of the TPMS.

• Develop experimental test rig to measure pressure drop and Nusselt number using 3D printed heat exchangers.

• Validate CFD with experimental results.

Expected outcomes

  This work is anticipated to offer:

• An in-depth knowledge of heat exchanger design, simulation and operation strategy for CSP applications.

• Experience in evaluation of thermo-hydraulic performance of the heat exchanger through CFD and experiments.

• Hands-on experience with sensors, controls and 3D printed heat exchangers.

• Potential scope of aiming towards a journal publication in peer reviewed top tier - International Journal of Thermal Sciences, Applied Thermal Engineering, Applied Energy etc.

Deliverables

The main deliverables of the project include:

• Final project report and presentation.

• CAD / CFD models and simulation files with instructions.

Timeline

January 2026 – June 2026 (flexible)

Contact persons