Anna Bogacz BG TEC Sp. z o.o. (PL)

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1 Anna Bogacz BG TEC Sp. z o.o. (PL) 1

2 BGTec Headquarters: Poland, Konstantynów Łódzki Focus: envelope solutions Activity: project, product, assembly Products: ventilated facade, curtain walls, sky-lights, window frames, winter gardens A2PBEER WP3 High Performance retrofitting envelope Leader: BERGAMO Partners: ABUD, ACCIONA, TECNALIA, ISOLEIKA, D APPOLONIA, IVL The research leading to these results has received funding from the European Union Seventh Framework Programme FP7/ under grant agreement no

3 A2PBEER and WP3 objects General description of WP3 and its expected results Affordable and Adaptable Public Buildings throught Energy Efficient Retroffiting WP3 design, develop and evaluate elements related to the Public building envelope retrofitting, namely: a) External super insulated façade retrofitting system b) Internal super insulated façade retrofitting system c) Smart reversible Window 3

4 Vacuum Insulation Panel (VIP) The main features VIP core material is fumed silica (thermal conductivity of 0.023W/m.K) placedinametalized polymer laminate thin multilayer (providing an air and vapour tight enclosure for the core material). Initial thermal conductivity: after 100 years (+air): 0.005W/m.K 0.007W/m.K VIP protected by ASFALTEX ASFAPLUS FV 20: Bituminous vapour barrier roll with a glassfibre felt reinforcement and plastic, adhered to both sides of VIP panel. Comparison of the behavior of different insulations with regard to conductivity (left ) 4

5 Form Material Density (kg/m3) Vacuum Insulation Panel (VIP) Comparison with other Insulation Material Thermal Conductivity (W/mK) Fire Effect as water Resistance Barrier Water vapour diffusion resistance factor m Effect as infiltration barrier Max. service temperature [ºC] Durability Sound absorption [%] Cost per R valu e Potential health risks Typical applications Rigid Board VIP 300 0,005 good good v.poor good 120 fragile poor high nontoxic, incombustible, recyclable and it does not release harmful emissions to the environment Flat roof, terraces Ceiling or floors Internal wall External wall behind cladding Insulation of double shell walls or core insulation Rigid Board Aerogel (Most commo n E100) 0,01 0,02 Good Pyrogel: A2, s1, d0 Sapceloft: C, s1, d0 Fair with facing barrier Good <5 good 800 Very low Dust density Fragile. which contain Usually crystalline silica Very Good Very High fiber can result in respiratory reinforced diseases and eye and skin damage. Board Expanded Polystyre ne (closed cellfoam) ,038 0,037 poor good (1,0% 2,5%) Good Good 100 R value decreases w/time Low R value decrease s w/time Organic (uses pentane gas as the expanding agent toxic) Walls, roofs and floors. Must be covered inside for fire and against for fire and against outsider weather Blankets: batts or rolls Rockwool (natural rocks) Excellent Poor Very Good 1 Poor Fair (with Facing) Compressi on Reduce R Value Very High Low Inorganic (organic binders), Irritating dust during installation Frame wall or ceiling partitions, prefabricated houses, irregularly shaped surfaces, ducts and pipes. Settling is expected 5

6 Vacuum Insulation Panel (VIP) Sizing VIP DIMENSIONING BARRIER Due to the nature of VIPs, manipulation on site is not possible This is a barrier to be addressed by providing adequate panel dimensions to cover the majority of the surface to be insulated. STANDARD DIMENSION The standard dimension according to the manufactures mould 700x1100mm. To reduce waste and maximise the use of base panel in fabricating the VIPs standard and special dimensions have been proposed based on logical division of the silica 6

7 APBEER: Integration of VIP in Facades Systems Excellent thermal properties, thermal conductivity λ=0,005w/mk The system is easy to install and customized to different building requirements The insulation thickness lower in comparison to other systems (30mm instead of 200mm) Internal: Significant internal floor space savings System can be incorporated with existing and future elements & services without affecting thermal layer 7

8 Vacuum Insulation Panel (VIP) The Application EXTERNAL FACADE VIP Panels: nominal dimension 600x1100mm; VIP thickness (30 mm) + rubber (3+3 mm) PVC clip supporting VIP panels additional PIR insulation Supporting structure L profile with 10mm thermal break T profiles Cladding INTERNAL FAÇADE VIP insulation (30mm) + rubber (3+3mm) A polythene vapour barrier (to remove the risk of interstititial condensation within the system) Mineral wool insulation (40mm) incorporated within the metal studs (additional acoustic and thermal performances to the system) within free standing aluminium vertical profiles Standardized 46 C metal studs 9mm OSB board to be used behind the plasterboard Plasterboard (15mm) 8

9 Vacuum Insulation Panel (VIP) The Thermal Behaviour EXTERNAL FACADE Thermal assessment provided for 30mm thick VIP (without taking into account wall construction): INTERNAL FAÇADE Thermal assessment provided for 30mm VIP System properties Selection criteria System value U Value 0.14 W/m2K (VIP (without counting existing k=0.005w/m.k) building fabric) 0,20 W/m2K (VIP k=0.008w/m.k) Thickness 112.4mm Cost /m2 (standard C46 stud) Height limit 3.30m (standard C46 stud) 3.60m (metalphonic stud) 9

10 Vacuum Insulation Panel (VIP) Conclusions The use of VIP for retrofitting purposes has a great potential to reduce the system s thickness and weight specially after the entry into force of the Recast of the EPBD directive Directive 2010/31/EU and the search for the Net Zero Energy Building, which look high energy performance new and existing buildings. VIPs are the market available insulation materials with excellent thermal conductivity properties, and when considering a high thermal resistance façade system, represent one of the most cost effective solutions for maximize the energy saving. Thermal properties of VIP panels can significantly contribute to lower energy consumption Designed systems with VIP panels are of lower thickness in comparison to other systems 10

11 Smart Reversible Window Main innovative aspects Main issue of existing low emissivity windows: low E coating is either on the outer (max. solar gain, desirable in winter) or the inner side (min. solar gain, desirable in summer) Breakthrough: to develop a reversible window, so that users can rotate the sash from winter to summer position and viceversa to change the position of low E coating to select the right configuration. 11

12 Reversible Windows Predicted profits Potential energy use reduction using a reversible window with different glass configurations has been estimated by performing a sensitivity analysis. The graph visualizes the benefits of the reversibility, given a specific glass configuration. Selection of glass configuration is highly dependent on the cooling demand. Simulation results shows the reduction of energy demand due to the smart window configuration the maximum reduction 5.8 [kwh/m2 floor area] corresponds to 39 [kwh/m2 glass area]. The reduction is calculated as the difference in energy demand with a reversible window and a fixed window in solar protection position. A speculation is that the potential for the smart window may decrease if implemented in an already highly retrofitted building where heating season is short and energy demand is already low. 12

13 Reversible Window Functionalities The innovative window concept is based on the idea of reversing sash in vertical or horizontal position through the central axis. Prototype dimensions 900x1400mm Wooden profiles thickness of 90mm. DUE TO POSSIBLE PATENT APPLICATION NO TECHNICAL DETAILS AND DRAWINGS CAN BE SHARED 13

14 Reversible Window Sensitivity analysis 14

15 Innovative aspects Advantages Disadvantages Limitations reversible sash, closing in the reverse position possibility to change E Low coating position by turning the window sash (expected energy savings) innovative type of sealing easy access to maintain the window (safe and easy window cleaning) reduced costs for heating reduced costs for cooling during hot periods comfortable indoor climate and conditions the whole year round adaptable for different dimensions possible different divisions reduced CO2 emissions thanks to the energy savings possibility to integrate shading no possible tilt position difficult to get around outside boundaries (columns) Prototyping costs Reversible Window Main features only one possibility for window opening (rotation) architectural limitations: lack of architectural elements such as columns, shading devices etc. on window rotation route necessity of free space outdoor as well as indoor investments for the industrialization phase 15

16 Reversible Window Conclusions Reversible window can contribute to lower energy consumption as well as comfortable indoor climate and conditions the whole year round 16

17 Demonstration A2PBEER Pilots Sweden (Malmo) Tec and Marittime Museum Spain (Bilbao) University Turkey (Ankara) Vocational School 17

18 FURTHER INFORMATION ON : Anna Bogacz, BG TEC Sp. z o.o. anna.bogacz@bergamo tecnologie.eu Project Coordinator: Eneritz Barreiro Sanchez, Tecnalia eneritz.barreiro@tecnalia.com 18