Improved high-temperature receivers for dish concentrators
This project seeks development of the state of the art in understanding,
predicting and managing thermal loss mechanisms for high-temperature
solar thermal receivers. The emphasis is on dish concentrators,
however the knowledge acquired has general application to tower
receivers as well.
Electrically-heated cavity receiver set-up, for measuring convection
heat loss at different receiver inclination angles.
Computational fluid flow model for two candidate receiver shapes under
consideration, simulated using OpenFoam.
Optical ray-tracing model as part of cavity shape optimisation.
Electrically-heated air-based models (Fig. 1)
as well as buoyancy-tank models with salty and fresh water
are used to improve qualitative and quantitative understanding.
In parallel, computational models of
convective heat transfer are developed to allow modelling
a broader range of cases than tested in the laboratory.
The OpenFOAM software package is employed (Fig. 2).
The ultimate objective is to develop a general-purpose model
for prediction of cavity receiver heat loss
for a wide range of solar concentrators.
radiation, and optical ray-tracing models (Fig. 3) are integrated
into multi-physics models used for the actual design
of new protoype cavity receivers.