Solar Heat Exchanger, ANSYS Fluent CFD Simulation Tutorial

$210.00 Student Discount

  • The problem numerically simulates the Solar Heat Exchanger using ANSYS Fluent software.
  • We design the 3-D model by the Design Modeler software.
  • We Mesh the model by ANSYS Meshing software, and the element number equals 304200.
  • We use Discrete Ordinates (DO) and Solar Ray Tracing to consider radiation heat transfer.
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Special Offers For Single Product

If you need the Geometry designing and Mesh generation training video for one product, you can choose this option.
If you need expert consultation through the training video, this option gives you 1-hour technical support.
The journal file in ANSYS Fluent is used to record and automate simulations for repeatability and batch processing.
editable geometry and mesh allows users to create and modify geometry and mesh to define the computational domain for simulations.
The case and data files in ANSYS Fluent store the simulation setup and results, respectively, for analysis and post-processing.
Geometry, Mesh, and CFD Simulation methodologygy explanation, result analysis and conclusion
The MR CFD certification can be a valuable addition to a student resume, and passing the interactive test can demonstrate a strong understanding of CFD simulation principles and techniques related to this product.



This simulation is about a solar heat exchanger via ANSYS Fluent software. We perform this CFD project and investigate it by CFD analysis.

This system consists of two parts: the water flow moves in the central part of the heat exchanger, and the airflow is in the gap located in the front plate of the heat exchanger.

The water flow enters the heat exchanger at a velocity of 4 m/s and a temperature of 30 ° C and leaves the heat exchanger at atmospheric pressure. The heat exchanger absorber wall is exposed to solar radiation and absorbs heat through radiant heat transfer.

This means the air gap temperature in front of the absorber plate rises as the sun heats up. This increase in air temperature causes heat to be transferred to the absorber plate, and subsequently, heat is transferred from the absorber plate to the water flow inside the heat exchanger.

Therefore, the water flow inside the system increases with the temperature received by the absorber plate. Also, to enhance heat transfer, several rows of inner walls are designed as a barrier inside the heat exchanger to prolong the water flow and increase the chance of contact with the absorber plate.

The geometry of the present model is drawn by Design Modeler software. The model is then meshed by ANSYS Meshing software. The model mesh is unstructured, and 304200 cells have been created.

Solar Heat Exchanger Method

The radiation model is used to define radiation heat transfer, and the defined Radiation model is discrete ordinates (DO). The discrete ordinates model is used for cases where the radiation heat transfer equations are solved for a finite number of discrete solid angles.

This model is the most comprehensive radiation model. It is used for scattering light, semi-transparent environments, glossy surfaces such as mirrors, and wavelength-dependent transitions.

Also, the solar ray tracing model has been used to apply solar load on the heat exchanger. The amount of direct solar radiation is defined as 1150 W.m-2, the amount of diffuse solar radiation is defined as 80 W/m2, and the direction of the sun’s rays is perpendicular to the absorber plane.

Solar Heat Exchanger Conclusion

After simulation, 2D and 3D contours related to pressure, velocity and temperature are obtained. The results show that the water flow temperature increases from the inlet section to the outlet section.

These temperature changes indicate that the radiation heat transfer and the effect of the solar ray tracing are completely applied to the heat exchanger absorber plate and, consequently, to the water flow.


  1. Suzanne VonRueden

    Does this simulation account for the effects of radiation on heat transfer?

    • MR CFD Support

      Yes, the simulation takes into account the effects of radiation on heat transfer. The energy equation used in the simulation includes a term for radiative heat transfer, allowing for accurate prediction of heat transfer in solar heat exchangers.

  2. Prof. Liana Berge Jr.

    Is there a way for me to contribute to this simulation?

    • MR CFD Support

      We welcome contributions! Feel free to share your ideas or suggestions.

  3. Maxine Tillman IV

    Can the results of this simulation be used to reduce the cost of solar thermal energy?

    • MR CFD Support

      Yes, the results of this simulation can provide valuable insights into the performance of solar heat exchangers. These insights can be used to optimize the design and operation of these systems, thus reducing the cost of solar thermal energy.

  4. Lottie Satterfield

    This simulation is a testament to the power of computational fluid dynamics!

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