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Maria Marques, FCT/UNL & UNINOVA-CTS, Lisbon, Portugal.

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Presentation 5, Session 3
“About building's flexibility and grid interaction”

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Maria Marques, FCT/UNL & UNINOVA-CTS, Lisbon, Portugal.

  1. 1. About building's flexibility and grid interaction João F. Martins, Rui Amaral Lopes UNINOVA Caparica, Portugal https://cts.uninova.pt http://energy.uninova.pt
  2. 2. Introduction Update to the Energy Performance of Buildings Directive • Commission proposes new rules for consumer centred clean energy transition, to cut CO2 emissions by at least 40% by 2030 • Objectives: 1. putting energy efficiency first 2. achieving global leadership in renewable energies 3. providing a fair deal for consumers
  3. 3. Energy Performance of Buildings Directive: • Smart, by encouraging the use of ICT and modern technologies, including building automation and charging infrastructure for electric vehicles, to ensure buildings operate efficiently; • Simple, by streamlining or deleting provisions that have not delivered the expected output; • Supportive of building renovation, by strengthening the links between achieving higher renovation rates, funding and energy performance certificates as well as by reinforcing provisions on national long-term building renovation strategies, with a view to decarbonising the building stock by mid-century. 1. Putting energy efficiency first
  4. 4. 2. Achieving global leadership in renewable energies (Solar and wind technology prices have declined respectively by 80% and 30-40% between 2009 and 2015) Consumers will benefit from stronger rights to: • produce their own electricity, and feed any excess back to the grid; • organise themselves into renewable energy communities to generate, consume, store and sell renewable energy; • stop buying heat/cold from a district heating/cooling system if they can achieve significantly better energy performances themselves.
  5. 5. 3. Providing a fair deal for consumers Clean energy in buildings is important, so: • speed up the renovation rate of existing buildings; • direct impact on consumers and households alike through lower energy bills; • creating a building renovation market for SMEs; • long-term perspective and vision towards the decarbonisation of buildings (by 2050).
  6. 6. Motivation / Abstract The growing share of renewable sources goes hand in hand with the extensive electrification of demand. Flexible energy systems (particularly buildings), which deviate from the traditional production response by integrating decentralized storage and demand response, are an important part of the solution. This presentation will address the concept of energy flexibility on buildings, particularly on Nearly Zero Energy Buildings, and discuss possible metrics to assess this flexibility. The impact of Nearly Zero Energy Buildings in the electrical grid will be discussed and several use cases will be analyzed to exemplify the usage of flexibility metrics.
  7. 7. Are NZEBs always a healthy solution? Rui Amaral Lopes, Pedro Magalhães, João Pedro Gouveia, Daniel Aelenei, Celson Lima, João Martins, A case study on the impact of nearly Zero-Energy Buildings on distribution transformer aging, Energy, Volume 157, 2018
  8. 8. Energy Flexibility IEA EBC Annex 67 “Energy Flexible Buildings” (2014- 2018) www.annex67.org Energy Flexibility of a building is the ability to manage its demand and generation according to local climate conditions, user needs and grid requirements. Energy Flexibility of buildings will thus allow for demand side management/load control and thereby demand response based on the requirements of the surrounding grids
  9. 9. Quantifying Energy Flexibility… Energy Flexibility depends on: • Available storage capacity (thermal and/or non-thermal) • Storage efficiency • Power shifting capability Possible methodologies to estimate Energy Flexibility : • Evaluating the impact of applying a specific control strategy to a specific case study (indirect approach, analyzing the resulting operational cost savings, reduction in CO2-emission or peak power reductions) • Direct prediction of the energy flexibility • Characterization in terms of its response to penalty functions
  10. 10. Quantifying Energy Flexibility… 1. Nuytten, T., Claessens, B., Paredis, K., Van Bael, J., & Six, D. (2013). Flexibility of a combined heat and power system with thermal energy storage for district heating. Applied Energy, 104, 583–591 2. D’hulst, R., Labeeuw, W., Beusen, B., Claessens, S., Deconinck, G., & Vanthournout, K. (2015). Demand response flexibility and flexibility potential of residential smart appliances: Experiences from large pilot test in Belgium. Applied Energy, 155, 79–90. 3. De Coninck, R., & Helsen, L. (2016). Quantification of flexibility in buildings by cost curves – Methodology and application. Applied Energy, 162, 653–665.
  11. 11. Quantifying Energy Flexibility… Rune Grønborg Junker, Armin Ghasem Azar, Rui Amaral Lopes, Karen Byskov Lindberg, Glenn Reynders, Rishi Relan, Henrik Madsen, Characterizing the energy flexibility of buildings and districts, Applied Energy, 225, 2018
  12. 12. Using Energy Flexibility at community-level to improve grid interaction of nearly Zero- Energy Buildings Rui Amaral Lopes, João Martins, Daniel Aelenei, Celson Pantoja Lima, A cooperative net zero energy community to improve load matching, Renewable Energy, 93, 2016, A Cooperative Net- Zero Energy Community (CNet- ZEC) is composed by several buildings fed by the same (micro) grid that, together with the electrical devices directly connected to the grid, cooperate to achieve certain objectives.
  13. 13. Using Energy Flexibility at community-level to improve grid interaction of nearly Zero- Energy Buildings Before… After…
  14. 14. Final remarks • Energy Flexibility is a TOOL not an objective… • Energy Flexibility depends on several aspects (weather conditions, controller quality, comfort needs, occupancy patterns…) • Several flexibility characteristics are needed to characterize the energy flexibility of a system • The Energy Flexibility characterization and use can be improved at community-level (micro-grid)
  15. 15. References Eurostat. (2012). “Energy, transport and environment indicators,”. A. Athienitis and W. O’Brien. (2015). Modeling, Design, and Optimization of Net-Zero Energy Buildings. Wiley. Lopes RA, Magalhães P, Gouveia JoãPedro, Aelenei D, Lima C, Martins João. (2018). A case study on the impact of nearly Zero-Energy Buildings on distribution transformer aging, Energy. IEA EBC Annex 67. (2016). “Energy Flexible Buildings”. Nuytten, T., Claessens, B., Paredis, K., Van Bael, J., & Six, D. (2013). Flexibility of a combined heat and power system with thermal energy storage for district heating. Applied Energy, 104, 583–591 D‟hulst, R., Labeeuw, W., Beusen, B., Claessens, S., Deconinck, G., & Vanthournout, K. (2015). Demand response flexibility and flexibility potential of residential smart appliances: Experiences from large pilot test in Belgium. Applied Energy, 155, 79–90. Stinner, S., Huchtemann, K., & Müller, D. (2016). Quantifying the operational flexibility of building energy systems with thermal energy storages. Applied Energy, 181, 140–154. De Coninck, R., & Helsen, L. (2016). Quantification of flexibility in buildings by cost curves – Methodology and application. Applied Energy, 162, 653–665. Glenn Reynders, Rui Amaral Lopes, Anna Marszal-Pomianowska, Daniel Aelenei, João Martins, Dirk Saelens. (2018). Energy flexible buildings: An evaluation of definitions and quantification methodologies applied to thermal storage, Energy & Buildings.
  16. 16. https://timepac2019.blogspot.com/ If you would like to have more information about this presentation, please contact: Authors: João F. Martins - jf.martins@fct.unl.pt Rui Amaral Lopes - rm.lopes@campus.fct.unl.pt Presenter: Maria Marques - mcm@uninova.pt

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