Sistemi di accumulo dell’energia termica - Luisa F. Cabeza (GREiA Research Group, University of Lleida)

© 2019 GREiA, University of Lleida
Thermal Energy Storage in microgrids:
overview and market opportunities
Le tecnologie per l'accumulo termico nelle Smart grid
Cagliari, Italy
Dr. Luisa F. Cabeza

2Dr. Luisa F. Cabeza – October 2019
Contents
• The role of TES in the energy system
• TES in microgrids
• Outlook

Energy storage in the energy system
• Balancing demand and supply
• Managing transmission and distribution grids
• Promoting demand side management
• Contributing to competitive and secure electricity supply
EASE EERA – Energy Storage Roadmap
Where can TES contribute?

TES in the energy system
• Hypothetical energy system
IEA Energy Storage Technology Roadmap

TES in the energy system
• Maturity of energy storage technologies
IEA Energy Storage Technology Roadmap

Contents
• Outlook

TES in microgrids

TES in microgrids: example 1
• Hybrid PV-CSP system with TES
• Existing system
• Communities isolated from the electricity grid
• Puertecitos, Baja California, México
• 20 families
• 55.2 kW PV
• 5 kW wind
• 75 kVA backup diesel generator
• 522 kWh lead-acid battery bank
J.A. Aguilar-Jiménez, N. Velázquez, A. Acuña, R. Cota, E. González, L. González, R. López, S. Islas
Solar Energy 174 (2018) 55-65

• Proposed extension of the system
• Solar parabolic trough collectors
• ORC
• TES
Solar Energy 174 (2018) 55-65

• Systems comparison
Solar Energy 174 (2018) 55-65

• Results of the simulation
Solar Energy 174 (2018) 55-65
Summer operation

• Economic comparison
Solar Energy 174 (2018) 55-65

• Hybrid residential RES with TES and EES
• Proposed system
• Residential building connected to the grid
• PV panels
• EES
• PEM fuel cell
• Absorption heat pump
• Water TES
L. Bartolucci, S. Cordiner, V. Mulone, M. Santarelli
energies 12 (2019) 2429

• System characteristics
energies 12 (2019) 2429

• Results of the simulations
energies 12 (2019) 2429

• Economic estimation
energies 12 (2019) 2429
Cost savings up to 30% in winter
Increased profits about 5% in summer

• Stand-alone microgrid
• Proposed system
• PVT
• Wind turbine
• Microturbine
• EES
• TES
• Backup natural gas boiler
A. Lorestani, G.B. Gharehpetian, M.H. Nazari
Energy 178 (2019) 751-764
Theoretical study with
no details on the
technologies

Energy 178 (2019) 751-764
Thermal
Electrical

• Economic estimation: total annual cost
• Based on the reliability index LPSP
• Environmental analysis
Energy 178 (2019) 751-764
Natural gas
Microturbine
Gas boiler

• Residential microgrid
• Proposed system
• PV
• EES
• TES
• Grid connected
N. Mohammadkhani, M. Sedighizadeh, M. Esmaili
Thermal Science and Engineering Progress 8 (2018) 494-508
no details on the
technologies

• Residential microgrid
N. Mohammadkhani, M. Sedighizadeh, M. Esmaili
Thermal Science and Engineering Progress 8 (2018) 494-508

• Energy management of a microgrid
• Proposed system
• PV modules
• Wind turbine
• Combined heat and power (CHP)
• Fuel cells
• Power only units
• Heat only units
• Plug-in electrical vehicles (PEVs)
• TES
A.S. Farsangi, S. Hadayehgparast, M. Mehdinejad
Energy 160 (2018) 257-274
no details on the
technologies

• Energy management of a microgrid
A.S. Farsangi, S. Hadayehgparast, M. Mehdinejad
Energy 160 (2018) 257-274

• Mini to microgrid applications of liquid air energy storage
• Proposed system
A. Tafone, E. Borri, G. Comodi, A. Romagnoli
Energy Procedia 158 (2019) 5053-5060

• System characteristics
Energy Procedia 158 (2019) 5053-5060

• Results of the simulations: performance maps
Energy Procedia 158 (2019) 5053-5060

Contents
• Outlook

Outlook
• TES can be implemented with several technologies in many
applications
• It is usually a custom made designed system, which it makes
market deployment more difficult
• TES has a clear role in the energy system
• The use of TES in micro-grids confirms this statement
• Some TES technologies are mature and in the market
• More research is needed to develop other TES technologies

Outlook
Crosscutting Strategic Research Priorities – RHC Platform
• Improving the properties of TES materials is important, in
particular concerning their stability and the number of charging and
discharging cycles they can withstand
• The durability of new systems and their constituent parts must
also be accurately quantified in order to estimate their long-term
performance
• Realising the great potential of TES will require research focused
on the integration and optimisation of heat/cold stores with
renewable energy technologies
• A “system-level perspective” is needed, taking into account
the heat demand patterns of all consumers connected to the
system, as well as the interaction with the building envelope and
the energy networks

Acknowledgements
© 2019 GREiA, University of Lleida
This work was partially funded by the Ministerio de Ciencia, Innovación y Universidades de
España (RTI2018-093849-B-C31).
Funding has also been received from European Union’s Horizon 2020 research and innovation
programs under projects Innova MicroSOLAR (723596), HYBUILD (768824), SWS-HEATING
(764025) and SolBio-Rev (814945).
The authors at the University of Lleida would like to thank the Catalan Government for the
quality accreditation given to their research group (2017 SGR 1537). GREiA is certified agent
TECNIO in the category of technology developers from the Government of Catalonia. This work
is partially supported by ICREA under the ICREA Academia programme.

Thank you for your attention!
www.greia.udl.cat
lcabeza@diei.udl.cat

Sistemi di accumulo dell’energia termica - Luisa F. Cabeza (GREiA Research Group, University of Lleida)

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