Roberto Lollini Coordinatore gruppo “Energy Management in Buildings”, EURAC Istituto per le Energie Rinnovabili. Innovare in cooperazione | Sistemi multifunzionali di facciata per il retrofit

1. Innovare in cooperazione
Eurac / Istituto per le energie rinnovabili – Roberto Lollini
esempi e progetti R&S per facciate multifunzionali
Fiera di Bolzano | Messe Bozen, Corsia | Halle D24 07.03.2015
Innovation Forum

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EURAC Research
• is an establishment for applied research and further education
• was founded in 1992 as a private non-profit organization
• has almost 400 collaborators

3. Institute for Renewable Energy
• Founded in 2005 … 10 years old!
• Main focus:
RES and energy efficiency … towards NZEB energy efficient
industries, optimal energy grid interaction, and smart cities
• ~ 60 collaborators shared in four research groups

4. Research groups

5. Research on facade system
• Integration of new functions
• Solar gain control and dayligthing
• Energy production in facade
• Prefabrication
• Non conventional materials to
improve thermal characteristics
• Rehabilitation synergies
• Responsive/adaptive
Multifunctional façade systems
Effect on:
- Thermal behaviour
- Energy
- Comfort/Healthy
- Power
- Urban context
- Installation/Commissioning/Mainte
nance (technical and financial
issues in a LCC approach)

6. Project iNSPiRe EURAC involved as Coordinator
www.inspirefp7.eu

7. 7
Objective: Development of systemic packages
for the deep energy renovation of buildings.
To move from a case-by-case to an industrial
approach, technologies are developed to put in
place the Packages
Renovation Kits are developed as prefabricated
compounds to be easily installed
Project iNSPiRe EURAC involved as Coordinator
www.inspirefp7.eu

8. The project iNSPiRe aims to develop and demonstrate systemic packages
for the deep energy renovation of buildings. The systemic renovation
packages will make use of innovative …
… envelope technologies,
… energy generation systems integrating a large amount of Renewable
Energy Sources (RES)
… energy distribution and lighting systems.
aiming to …
… reduce the HVAC energy consumption to
less than 50 kWh/(m²year)
… reduce the lighting energy consumption by at least 50%.
8
Project iNSPiRe EURAC involved as Coordinator
www.inspirefp7.eu

9. Based on the building features and climatic conditions, Envelope Renovation
Packages will be assessed including passive and active solutions, e.g.:
 Air-tight insulation + heat recovery devices for cold climates
 Roof insulation + integrated solar thermal collectors
Project iNSPiRe EURAC involved as Coordinator
www.inspirefp7.eu
EURAC role: concept development
of the kits + performance
characterization through
simulations and experimental
campaign

10. Demo cases
Two residential social-housing buildings One office building
Stuttgart
Madrid
Verona
Project iNSPiRe EURAC involved as Coordinator
www.inspirefp7.eu

11. Project CommONEnergy EURAC involved as Coordinator
www. commonenergyproject.eu

12. Objective: Re-conceptualize shopping malls through deep retrofitting, developing
innovative technologies and solution sets and application in demo cases
o reducing to factor 4 the energy demand
o shaving power peaks
o increasing of 50% the share of RES
while improving internal comfort
Project CommONEnergy EURAC involved as Coordinator
www. commonenergyproject.eu

13. Project CommONEnergy EURAC involved as Coordinator
www. commonenergyproject.eu
Reducing energy needs and greenhouse gas
emissions in VALLADOLID/Spain DEMO CASE
Development of modular multifunctional climate adaptive FAÇADE SYSTEM

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 Glass properties adjustment
 Shading system+ PV
 Day-light solutions integration
 Natural ventilation system
integrated
 Semi-transparent BIPV integration
Solution: façade system
Combination of different strategies.
Project CommONEnergy EURAC involved as Coordinator
www. commonenergyproject.eu
Development of modular multifunctional climate adaptive FAÇADE SYSTEM
EURAC role: contribution to the concept
development and performance
characterization through simulations and
experimental campaign

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0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
VA: Qin = 10 W/m²
VA: Qin = 20 W/m²
VA: Qin = 40 W/m²
VA: Qin = 80 W/m²
GE: Qin = 10 W/m²
GE: Qin = 20 W/m²
GE: Qin = 40 W/m²
GE: Qin = 80 W/m²
TR: Qin = 10 W/m²
TR: Qin = 20 W/m²
TR: Qin = 40 W/m²
TR: Qin = 80 W/m²
Hours
Ventilative cooling not required
Direct ventilative cooling with ventilation rate maintained at the minimum (EN 15251)
Direct ventilative cooling useful
Direct ventilative cooling not useful --> consider nighttime ventilation
Ventilative cooling potential analysis
Project CommONEnergy EURAC involved as Coordinator
www. commonenergyproject.eu

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100% hours
0
1
2
3
4
5
0 10 20 30 40 50 60 70 80 90 100
Meandirectcoolingventilationrate[vol/h]
Internal gains [W/m²]
Genova
Valladolid
Trondheim
Bubble size indicates the % of hours when direct ventilative cooling
is potentially effective.
Project CommONEnergy EURAC involved as Coordinator
www. commonenergyproject.eu
Ventilative cooling potential analysis

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Project CommONEnergy EURAC involved as Coordinator
www. commonenergyproject.eu
Ventilative cooling potential analysis

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Stack effect ventilation strategy
Project CommONEnergy EURAC involved as Coordinator
www. commonenergyproject.eu
Ventilative cooling potential analysis

19. Mass flow rate
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Project CommONEnergy EURAC involved as Coordinator
www. commonenergyproject.eu
Ventilative cooling potential analysis
Min required mass
flow rate to meet
IAQ requirements
h 06:00 – 18:00
2648 kg/hr
© Glasbau Hahn
© SE controls
© PROCOMSA

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Prefab façade for retrofit
Source: IEA ECBCS Annex 50 – Graz Dieselweg Case Study
and Gap Solution GmbH

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From: single component/system replacement
To: comprehensive approach, using prefabricated multi-functional
façade system, including both passive and active strategies/solutions
Moving from construction site to farm allows better quality, reduced
time and impact on final user, but needs more efforts on preliminary
audit
Parametric modeling of the multi-functional façade system to make
easier the development of technology concept, supported by
quantitative performance assessment
Prefab façade for retrofit

22. RETROFIT
NEEDS
USE EXISTING
GOOD POINTS
REQUIREMENTS
OF MODERN
BUILDING AND
NEW ENVELOPEFunctions
Performance targets
Comfort
Healthy
Energy saving
Peak shaving
Reinforcement
Functionality
Aesthetics
…
Building physics
Good architecture
(passive solutions)
Heritage value
…
Prefab façade for retrofit
Background

23. Method:
• Existing building stock analysis
• Analysis of energy needs and main building and facade
characteristics
• Deepen peculiar case
• Identify function (components) to be integrated
• Integrated process to design the new envelope: modular and
flexible sub-structure + functional modules
Prefab façade for retrofit

24. Social house building built in 1970
Surface estimation of similar buildings in Italy: 177.5M m2 (7% of total residential buildings)
Case study_Bolzano, via Palermo Case study_East view_Bolzano, via Palermo Case study_West view_Bolzano, via Palermo
IR image of the case study in Bolzano_T [°C]
Feasibility study – Bolzano, Italy

25. Concept modelling and simulations
- Sensitivity analysis
- Simulation of scenarios with fixed and free
floating temperature
- Energy saving and comfort evaluation
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Feasibility study – Bolzano, Italy

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Multifunctional façade concept:
• Metallic sub-structure
• Solar collector
• Insulation layer
• Radiant system in the outer side of the
existing wall (dynamic insulation)
• More performing windows
Case study_East view_Bolzano, via Palermo
Multifunctional facade module
including window:
Size: 4300x3000 mm
Weight: 100 kg/m²
Feasibility study – Bolzano, Italy

27. Performance analysis
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Scenario
Output
Retrofit with multi-
functional façade
system
Base case
External
insulation
External
insulation +
windows
replacement
Thermal energy consumption 66.1
285.4 190.6 79.1
77% 65% 16%
Primary energy with active
cooling
114.0
335.0 239.7 125.8
66% 52% 9%
Primary energy without thermal
cooling
108.9
330.7 235.8 123.4
67% 54% 12%
Feasibility study – Bolzano, Italy

28. Objective of the project: develop a retrofitting solution
package for existing public-owned non-residential
buildings in order to achieve a drastic reduction of the
energy consumption.
EURAC role: performance-based optimization through dynamic
simulations
Ventilated façade
The system is a sustainable lightweight ventilated
façades constitutes a second skin outside the
existing façade. A natural vented cavity is located
between these two skins creating a void gap for
“chimney effect”
Project Bricker
EURAC involved as Project partner
www.bricker.eu

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Aerating Window for heat recovery
The heat recovery technology is based on the
fabrication of a multitude of micro-channels made
from synthetic thin foil material arranged in as
counter flow and providing for primary surface heat
transfer  high thermal effectiveness + low
pressure drops.
Principle: In winter, fresh outdoor air is filtered,
freely preheated and supplied to the room for the
benefit of the occupants. At the same time, an
equal quantity of waste air is extracted, cooled and
transferred outside. The same heat transfer takes
place inversely in hot conditions (summer).
Project Bricker
EURAC involved as Project partner
www.bricker.eu

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The energy is adsorbed when the material changes in
state, from solid to liquid, and it is released when the
materials changes in state back from liquid to solid. The
thermal energy transfer during phase changes occurs in
nearly constant temperatures, otherwise than in other
materials used as thermal insulation. PCMs combined
with traditional insulation material - PUR foam, highly
improves its thermal behaviour heat storage capacity
PIR foams with embedded Phase
Changing Material
Project Bricker
EURAC involved as Project partner
www.bricker.eu

31. Innovative façade in South Tyrol:
Project «i-Cover»
Objective: to design a solar heating and cooling
system driven by a building integrated solar active
façade. Numerical simulations under different
European locations.
In partnership with:
Co-financed by:
The façade system

32. Innovative façade in South Tyrol:
Project «sun-RISE»
Novel facade system for new and
existing buildings:
- Multifunctional
- Metal-glass concept
- Integrate solar thermal active system
for heat production
EURAC role: concept development and
characterization through simulations and
experimental campaign
In partnership with: Co-financed by:
Institute for Renewable Energy
http://www.stahlbaupichler.com/it

33. Institute for Renewable Energy
Contact Person:
Roberto Lollini: roberto.lollini@eurac.edu
Coordinator of research group “Energy management in buildings“
Institute website:
http://www.eurac.edu/it/research/institutes/renewableenergy/default.html