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Dependency of energy loads and operational costs of a typical office room on façade design choices. Paolo Bonato (EURAC research)

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FACEcamp Results Seminar
20/05/2019 NOI Techpark, Bolzano (Italy)
Monday, May 20th, 2019
NOI Techpark, Bolzano-Bozen

Published in: Technology
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Dependency of energy loads and operational costs of a typical office room on façade design choices. Paolo Bonato (EURAC research)

  1. 1. Dependency of energy load and operational costs of a typical office room on façade design choices Paolo Bonato, Eurac Research www.interreg.netFACEcamp is funded by European Regional Development Fund and Interreg V-A Italy-Austria 2014-2020. FACEcamp Results Seminar Bolzano, 20 May 2019
  2. 2. Introduction (1) In the development of new technological solutions, a prevailing trend toward complexity can be recognized in the façade industry. The building envelope no longer remains limited to its traditional functions, but can integrate additional ´decentralized façade services´ as energy storage, RES generation or ventilation. [Facades: Principles of construction, Knaack et al.] Results Seminar 20 May 2019, Bolzano
  3. 3. Introduction (2) Ventilation Solar thermal Solar cooling Results Seminar 20 May 2019, Bolzano
  4. 4. Motivation In order to design multifunctional façade products that can effectively tackle the issues of energy efficiency and energy generation in buildings, it is fundamental 1. To understand how some basic design choices of the façade element affect the power and energy demand of the adjacent space 2. To define the range of energy and power loads that should be satisfied by the active components integrated in the façade element. Results Seminar 20 May 2019, Bolzano
  5. 5. Objective (1) The aim of the project work is to create a tool to support the sizing process of active components in multifunctional façade modules for office buildings The annual energy demand and the power loads are assessed for typical office room via numerical simulations for different boundary conditions. The results are collected in a database Results Seminar 20 May 2019, Bolzano
  6. 6. Methods (1) The energy and power load of the reference office space are quantified for different environmental conditions and façade designs. The parameters varied in a full factorial combination are: • Climate → Rome, Stuttgart and Stockholm • Façade orientation → S, W, N, E • Window-To-Wall ratio → 30%, 60%, 90% • Shading systems → no shading, fixed device and movable blinds • Glazing typologies → double/triple solar control and low-e glazing • Level of insulation of the infill → 6 cm and 12 cm of mineral wool Results Seminar 20 May 2019, Bolzano
  7. 7. Methods (2) The process followed in the project work is structured as follows: 1. Definition of the characteristics of the thermal zone and boundary conditions (GlassAdvisor + Window, Meteonorm, relevant norms and standards) 2. Development of the numerical model and simulation work (Rihnoceros, Grasshopper and TRNLizard) 3. Collection of the outputs in a suitable database and statistical / graphical analysis (MS Excel) Results Seminar 20 May 2019, Bolzano
  8. 8. Discussion of the numerical results (1) Results Seminar 20 May 2019, Bolzano
  9. 9. Discussion of the numerical results (2) Results Seminar 20 May 2019, Bolzano
  10. 10. What about the cost of energy? The annual energy bill for space heating and cooling is about 2.7 €/m2 or 80 € /y for an office cell of about 30 m2. The potential cost savings connected to the reduction of the running costs of space conditioning are limited! Other drivers? Discussion of the numerical results (3) Results Seminar 20 May 2019, Bolzano
  11. 11. Discussion of the numerical results (4) Results Seminar 20 May 2019, Bolzano
  12. 12. Next steps • Extend the range of façade designs & climates. The space of variables considered could be widened in accordance to the needs; • Improvement of the numerical model of office cell; • Validation against reference or measured data; • Sensitivity analysis on office boundary conditions; • Development of a tool for early design of facades. Development of a tool to assist architects and façade designers in understanding the link between façade design and energy consumption. Results Seminar 20 May 2019, Bolzano
  13. 13. Thank you for your attention! www.interreg.net Paolo, Bonato Eurac Research paolo.bonato@eurac.edu FACEcamp is funded by European Regional Development Fund and Interreg V-A Italy-Austria 2014-2020.

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