Numerical example

The Gebhart method describes the radiative heat transfer in terms of heat coming from one surface and absorbed by another, including all reflections. The Gebhart matrix traces exactly the radiative transfer contribution of each surface to the others.


The plates exchange heat with each other and with the room, but only the plate surfaces facing each other are to be considered in the analysis (other side assumed to be perfectly insulated).


The view-factor of between the two surfaces is analysed to be 0.285. The Gebhart factor for this problem the result would become:
B12 = 0.1473 (very close to the factor if no reflection are taken into account = F12 x ε2 = 0.1425)

In this case the radiative exchange can be calculated by:


The surface to surface heat transfer matrix (in W) of this system is given below for this method.


References

Who will you nominate for…

We are requesting technical universities and colleges in the Netherlands and Flanders to submit their students’ graduation reports before September 10. An expert jury will then review the reports and...

Read more
Mikroniek September 2021: (Bio)medical precision

The September 2021 issue of Mikroniek features the theme of (bio)medical precision. The cover story presents the bio-inspired design of a self-propelling and steerable needle for potential applications in drug...

Read more
The next step of Project…

Project MARCH, a non-profit student team from Delft University of Technology (NL), is driven by the vision that using exoskeleton technology can improve the quality of life for people with...

Read more