Home » SolarPACES Tasks » TASK III: Solar Technology and Advanced Applications » Thermal Energy Storage Working Group

Thermal Energy Storage Working Group

General Coordination: Esther Rojas, CIEMAT, Spain

Objective:
Promoting collaboration on Thermal Energy Storage (TES) to improve its reliability, integration on CSP plants and to develop a common language.

If you are willing to participate in any of the following Activity lines, do not hesitate to get in contact with the corresponding coordinator of the activity or with Esther Rojas (general coordinator).

Current Activity lines

  • Characterization of specific equipment for commercial TES

CoordinatorM. Rodriguez, CIEMAT, Spain
Motivation

1. Components reliability with molten salt is not proved before installing them at plants.
2. In commercial plants if one of these components presents a malfunction, it will just be repaired (often by component replacement).
3. Aligned with task 6.4 of the European project SFERA-III.
4. MOSAICO project, funded by SolarPACES TCP and coordinated by M. Rodriguez (CIEMAT). This project joined the efforts performed in this activity line with those of the SFERA III project to present the testing methodologies to the industrial sector. In the workshop entitled Towards the standardization of molten salt loops’ instrumentation and components, in Evora, October 24th, 2023, these main results were presented:

1. SolarPACES Task III and SFERA-III project introduction (by M. Rodriguez, CIEMAT, and M. Georgiou, CYI)
2. Facilities for characterization of components

MOSAICO: TESIS (M. Prenzel, DLR)
MOSA and BES Facilities at Ciemat (M. Rodriguez, CIEMAT)
PROTEAS (M. Georgiou, CYI)
Infrastructure at Fraunhofer for Molten Salt (by T. Fluri, Fraunhofer-ISE)
ENEA Facilities (W. Gaggioli, ENEA)
EMSP Facility (P. Horta, UEvora)
CIEMAT: Valves (M. Rodriguez, CIEMAT)
ENEA: Valves (W. Gaggioli, ENEA)
Pressure sensors characterisation (M. Rodriguez, CIEMAT)
Flow meters characterisation (T. Fluri, Fraunhofer-ISE)
Electrical heat tracing characterization (W. Gaggioli, ENEA, and M. Georgious, CYI)
Integration of components in a 3.6MW molten salt plant (P. Horta, UEvora)

3. Valves characterization (M. Rodriguez, CIEMAT and W. Gaggioli, ENEA)
4. Pressure sensors characterization (M. Rodriguez, CIEMAT)
5. Flow meters characterization (T. Fluri, Fraunhofer-ISE)
6. Electrical heat tracing characterization (W. Gaggioli, ENEA, and M. Georgious, CYI)
7. Integration of components in a 3.6MW molten salt plant (P. Horta, UEvora)

Partners and facilities currently involved

Partner

Facility

Capability of testing

 

MOSA

BES-II

Valves, flowmeters, HX, vertical pumps, pressure transducers

TESIS

Valves, flowmeters, parabolic trough receivers, pressure transducers

   

Molten salt loop – lab-scale

Valves, flowmeters, pressure transducers, strain gauges

MOSE

PCS

Valves, flowmeters, parabolic trough receivers, flexible joints, pressure transducers

NEWSOL Loop

EMSP Platform

Valves, flowmeters, pressure transducers, Heat tracing, Heating elements, HX, parabolic trough receivers

Current status:

    1. Identification of critical equipment and related problems (open to new problems that could appear in commercial plants
    2. Definition of tests.
    3. Tests on valves, flanges, flowmeters, heating elements, pressure sensors and flexible joints.
    4. MOSAICO project. This project joint the efforts performed in this activity line with those of the SFERA III project to present the testing methodologies to the industrial sector.

Survey of R&D Activities on Thermal Storage Systems

CoordinatorR. Bayón, CIEMAT, Spain
Motivation:  Promoting current research activities on TES by creating a database containing information of R&D activities in thermal storage developed by the participants

Current status:

Survey of R&D activities on TES updated 10/2023

 

Previous Activity lines

  • Storage Materials

Coordinators: J. Nieto (Tecnalia/Spain), J. González (IMDEA Energía/Spain)
Main Achievements:  3 Round Robin Tests performed:

1.Specific heat capacity of sensible materials(
2. Solar salt with nanoparticles
) 9 participants, including industry; Achieved agreement in accurately measuring cp with DSC, according to normalized methods ASTM E1269 and MDSCTM in the range of temperatures 200 and 400ºC (SolarPACES 2016).
3.Reaction enthalpy of thermochemical materials
4. Cobalt oxide:
7 participants, including industry; there was no coherency and agreement in the results obtained by different partners (SolarPACES2016).
5. Perovskites: 7 participants; Some discrepancies in results (SolarPACES2018).

Prototype Testing

Coordinator: P. Garcia, CEA, France
Main Achievements:

1. Report  Definition of common procedures for testing thermal storage prototypes for STE plants (2016).
2. Aligned with task 6.3 of the European project SFERA-III: D6.3 Protocol for testing sensible and latent storage prototypes.
3. Main results presented at IRES 2022 in the Workshop
Towards a fair evaluation of Thermal Energy Storage prototypes – Guidelines for CSP applications: