Techno-economic performance evaluation of solar tower plants with integrated multilayered PCM thermocline thermal energy storage: a comparative study to conventional two-tank storage systems
Tipus de documentText en actes de congrés
EditorAmerican Institute of Physics (AIP)
Condicions d'accésAccés obert
Solar Tower Power Plants with thermal energy storage are a promising technology for dispatchable renewable energy in the near future. Storage integration makes possible to shift the electricity production to more profitable peak hours. Usually two tanks are used to store cold and hot fluids, but this means both higher investment costs and difficulties during the operation of the variable volume tanks. Instead, another solution can be a single tank thermocline storage in a multi-layered configuration. In such tank both latent and sensible fillers are employed to decrease the related cost up to 30% and maintain high efficiencies. This paper analyses a multi-layered solid PCM storage tank concept for solar tower applications, and describes a comprehensive methodology to determine under which market structures such devices can outperform the more conventional two tank storage systems. A detail model of the tank has been developed and introduced in an existing techno-economic tool developed by the authors (DYESOPT). The results show that under current cost estimates and technical limitations the multi-layered solid PCM storage concept is a better solution when peaking operating strategies are desired, as it is the case for the two-tier South African tariff scheme.
CitacióGuedéz, R., Ferruzza, D., Arnaudo, M., Rodriguez, I., Perez, C., Hassar, Z., Laumert, B. Techno-economic performance evaluation of solar tower plants with integrated multilayered PCM thermocline thermal energy storage: a comparative study to conventional two-tank storage systems. A: Solar Power and Chemical Energy Systems. "SolarPACES 2015: International Conference on Concentrating Solar Power and Chemical Energy Systems: Cape Town, South Africa, 13-16 October 2015". Cape Town: American Institute of Physics (AIP), 2015, p. 070012-1-070012-9.
Versió de l'editorhttp://aip.scitation.org/doi/abs/10.1063/1.4949159
- TUAREG - Turbulence and Aerodynamics in Mechanical and Aerospace Engineering Research Group - Ponències/Comunicacions de congressos 
- CTTC - Centre Tecnològic de la Transferència de Calor - Ponències/Comunicacions de congressos 
- Departament de Màquines i Motors Tèrmics - Ponències/Comunicacions de congressos