Solar Fuels I

24 outubro 2019, 16:00 • Francisco Manuel Da Silva Lemos

General discussion on the use of energy storage solutions by resorting to liquid fuels.

Avantages of the use of fuel synthesis in terms of long-term storage and storage capacity.

Discussion of the reasons why fuel storage can be considered a low risk approach but with need for extensive research and development - availability of fuel synthesis technology and need to develop this technology with intermitent energy sources.

Preliminary presentation of different proposed configurations for solar refineries.

Discussion of the advantages of producing liquid fuels.Introduction of the Energy Return on Energy Invested concept.

Distinction between primary energy sources and secondary energy sources or energy vectors.

Thermochemical heat storage- Promising candidates and applications in development

18 outubro 2019, 14:00 • Marta Ramilo Abrantes

Technology maturity and projects in the world

Examples of potential reaction candidates for chemical storage: gas-gas reaction/liquid-gas/solid-gas

Examples of applications in development

Thermochemical heat storage - Introduction and principles

17 outubro 2019, 16:00 • Marta Ramilo Abrantes

Thermal energy storage: sensible, latent, chemical

Chemical bonds

Bond energy and reactions

Storage by Revrsible Reactions 

In the 2nd part of the Lecture Dr Rui Teixeira, CEO of Heaboo presented a talk about the development of a product based on PCMs.

Thermal Energy Storage using Phase Change Materials

10 outubro 2019, 16:00 • Joao Manuel Nunes Alvarinhas Fareleira

 Equilibrium binary phase diagrams (continuation);  the phase rule and temperature versus time cooling curves.  The Stefan (or moving boundary) problem and phase equilibria in capsules containing phase change materials.

In the second part of the class, Dr. Carlos Nogueira gave a presentation about "Molten nitrate salts containing lithium as thermal energy storage media: properties and stability". 
  

Thermal energy storage using phase change materials. Phase diagrams.

4 outubro 2019, 14:00 • Joao Manuel Nunes Alvarinhas Fareleira

Discussion of several points related to the subject of thermal energy storage, mainly about phase change materials (PCMs) and phase equilibrium. Discussion about the importance to improve the effective thermal conductivity of PCM or the heat transfer within encapsulated PCM.  Discussion of binary phase diagrams, with emphasis on solid-liquid equilibria and on the interpretation of cooling curves, on the basis of the Phase Rule..

In the 2nd part of the class, Eng. João Castanheira, CEO of Climaespaço, Engie, gave a presentation on "District Heating and Cooling".