Input to Concept from Thermal Analysis Active Space Technologies GmbH – D’Appolonia

1. 6 months Meeting 9-10 December 2010 CSGI Treviso – Italy Input to Concept from Thermal AnalysisActive Space Technologies GmbH – D’Appolonia

2. Summary of the presentation • Thermal analysis give necessary input to business model and LCA • A good thermal model of the problem is the first step to achieve good and realistic results • To achive this, the choice of a good software, assumptions and parameters to be used are necessary pre-steps

3. Summary of the presentation • Software selection • Users list • Assumptions for the models – examples • Results • Conlcusions

4. Summary of the presentation • Software selection • Users list • Assumptions for the models – examples • Results • Conlcusions

5. Software selection • For first simulations • To get the first (rough) results for Business model and LCA • Simple, fast and easy-to-use software • Pre-existent case-history in Building simulation → esp-r • A different software for future detailed Thermal Analysis (WP5) • Cfd software • Star CCM+ by CD-Adapco

6. Summary of the presentation • Software selection • Users list • Assumptions for the models – examples • Results • Conlcusions

7. Users list Market analysis  Users list User 1: • industrial building 32mx32mx5m • south oriented • 15% windows • Palermo climate • light structure • 1)       standard bitumen based membrane • 2)       COOL membrane • 3)       5cm insulation + standard bitumen based membrane • 4)       5cm insulation + COOL membrane • 5)       standard bitumen based membrane  over old standard bitumen based membrane • 6)       COOL membrane over old standard bitumen based membrane

8. Users list User 2: • vertical multilevel building of the ‘60s, 18mx18mx3mx5 levels • cool painton east, west and south façade • south oriented • 10% windows • Palermo climate • light structure • 7)       normal paint • 8)       normal paint + cool additive   • 9)       5cm external insulation + reinforcement + normal paint    • 10)     5cm external insulation + reinforcement + normal paint + cool additive

9. Users list • User 3: • vertical multilevel building 18mx18mx3mx5 levels • cool tileson east, west and south façade • south oriented • 10% windows • Palermo climate • light structure • bonded tiles and ventilated facade • 11)   bonded tiles • 12)   cool bonded tiles   • 13)   5cm insulation + ventilated ceramic façade • 14)   5cm insulation + ventilated cool ceramic façade * User4

10. Summary of the presentation • Software selection • Users list • Assumptions for the models – examples • Results • Conlcusions

11. Models assumptions Some examples: • Different heating/cooling setpoints during day and night • Different number of people during day and night • Lights heating • Equipment heating • Air infiltration/ventilation • Construction materials • No natural convection • No „ventilated“ façades User3 Heating/Cooling setpoints: 7h-19h weekdays → 19°C-24°C 19h-7h weekdays → 15°C-28°C 24h weekends → 10°C-30°C User1 Occupants: Total horizontal surface is 1024 m², an average of 36 workers between 8h and 18h. No people in during the weekend. Person working: 125W (65.5W sensible, 65.5W latent) Total: 4500W

12. Summary of the presentation • Software selection • Users list • Assumptions for the models – examples • Results • Conlcusions

13. User1 - results textile + reflective paint layer added Solar reflectance: 0,1→0,85

14. User2 - results • Energy consumption per year of the whole building Solar reflectance: 0,44→0,57 +30%

15. User3 - results Solar reflectance: 0,1→0,33

16. User3 - results Solar reflectance: 0,1→0,33 * No „ventilated“ façades

17. Summary of the presentation • Software selection • Users list • Assumptions for the models – examples • Results • Conlcusions

18. Conclusions • Where the COOL materials are used alone, we obtain a reduction in the cooling energy necessary to the building and an increase in the heating energy • Even with „the loss“ in the heating energy, we have a total net advantage in the use of COOL materials (total energy delivered -the loss in heating energy is very low-) • The „classical insulation“ is able to reduce both the heating and the cooling energy needs, but it has no good impact on the cooling when it is used for roofs • Higher energy savings with higher improvements in refectance values (user1&3 better than user2) Thank you!