Periodic Reporting for period 3 - IN-POWER (Advanced Materials technologies to QUADRUPLE the Concentrated Solar Thermal current POWER GENERATION)
Reporting period: 2020-01-01 to 2020-12-31
TEKNIKER has developed the optimal multilayer configurations for absorber coatings. Stacks of layers comprising IR reflecting mirror, absorber and antireflective layer have been defined, and different combinations of these materials have been studied. Values of absorbance accomplished the expected target and an impressive reduction in emissivity is achieved. Three types of absorber coatings have been developed, two for evacuated tubes operating at high and medium temperature regime. A new absorber coating for air operation and high temperature is in progress. In the first two cases, TEKNIKER has manufactured dozens of evacuated tubes which will be integrated in facilities of PTC and LFC pilots in ENEA and MAGTEL respectively.
The new TES materials and systems are developed and modelled. FERTIBERIA has worked on a new formulation of eutectic mixtures, ternary and quartenary formulations, achieving targeted KPIs. CEA has worked on encapsulated phase change materials that can be combined with eutectic mixture in a thermocline design. Using the properties of the new materials, CEA has developed a modelling procedure that validated and a portfolio of TES systems has been modelled.
A lightweight composite, selected by LEITAT and MAGTEL, has been defined, commissioned and installed in a PV loop in MAGTEL’s site for validating the behaviour of this component in a solar field. In order to improve the cost of the solar field; new mirror and absorber, developed in IN-POWER, has been used for modelling standard PTC among the real validation in planar LFC pilot. The potential of different geometries easier to achieve with polymeric mirrors allow to make improvement in PTC increasing the performance or at least have the same performance but with a relevant reduced cost (CAPEX & OPEX). The results of such modelling, done by LEITAT, show that IN-POWER materials are totally suitable for high performed PTC.
Nowadays, all IN-POWER materials are under testing and validation phase, in order to determine their lifetime and performance. For this, pilot in MAGTEL, CEA and ENEA; and outdoor platforms of LEITAT (in Chile, too) are used for these activities. Finally, LCOE model is in progress. CAPEX from materials and component have been estimated and now, OPEX is under evaluation.
High performance advanced cermet absorber coatings achieve the KPI’s absorbance and emissivity values. In the last case, the impressive low value of emissivity allows reducing the thermal losses increasing annual energy production. Among this, it is the first time that an absorber coating is developed for non-evacuated tubes, that could be a solution to reduce cost or increase lifetime of current tubes.
Tons of eutectic mixture have been developed and now under validation for thermal storage systems. The thermal capacity allows reducing the volume need for same thermal energy capacity. Modelling of the two tanks and one tank thermal systems, in combination with low cost PCM and new eutectic mixture give a portfolio of solutions to CSP sector.
Different protocols for testing and validation in real operation regime have been developed and the final results and correlation with previous accelerated testing will be useful for lifetime and cost estimation of all developments.