Solar receiver loop
It is a liquid water loop of approximately 4 m length used to test the tubes of external solar receiver for solar tower power plants. The heat flux in the tube is obtained with an inductor system that heat unilaterally the tube with heat flow rates of 0.5-1 MW/m2. The facility is equipped to measure temperatures, stresses and deformations in the receiver tube. It is used to preliminarily validate the use of different geometries and composition of the tube and allows carry out tests with different structural boundary conditions and supports.
Molten Salt Solar Loop
Experimental facility of the tubes of external solar receiver of solar tower power plants equipped to measure temperature and thermal stresses in the tubes.
It is a molten salt loop (KNO3+NaNO3) of approximately 12 m length used to obtain experimental measurements of the tubes in solar tower receivers, under real operating conditions. The facility is able to operate at different temperatures (from 300 ºC to 600 ºC) and variable flow rate; the geometry and material of the tube can be changed and the measurements can be carried out under steady or transient conditions. An inductor system is used to heat unilaterally the tube with heat flow rates of 0.5-1 MW/m2, similar to the conditions in real plants.
Compound Parabolic Concentrator
A Compound Parabolic Concentrator (CPC) is available in our laboratory. It redirects the incident solar rays from the lateral parabolas to the central flat area, where the solar receiver is located. The receiver dimensions are 150 mm wide and 1000 mm long.
The expected solar concentration is about 4.6 suns. Measurements taken in May at University Carlos III of Madrid have shown a heat flux of about 3.6 kW/m2, achieving a solar concentration of about 4.