Sustainable Refurbishment, Retrofit,Energy Management in Housing

Zirmunu str. 116, VilniusERASMUS IP 2013

Tiago Sousa Portugal Artur AkulovEstoniaAnna MukhinaGermany Alina GarlukovičLithuania1

About Hector's dolphin• Physical Characteristics• Diet• Social Structure• Breeding

Facts :• Hector’s dolphin was named after James Hector who is believed to be the first person to have examined this species.• These dolphins are only found living in the waters of New Zealand throughout the year.• Due to pollution, boating and other activities over the past 30 – 40 years number of these dolphins have reduced from around 26,000 to less than 7,500 2

The main tasks of the project• Energy efficiency;• Building services;• Green roofs and facades;• Calculation of investment and returns in passive house and retrofit projects.

3

Energy efficiency• Analysing current situation• Thermal bridges• Choosing materials and windows• Energy demand on heating• Costs

4

Energy efficiency. Current situation• U-values (old construction):

5

External envelope Area (m )² U-value (W/m K)² Roof construction 450 0,65 Ground floor construction 450 0,65 External wall 860 2,80 Windows, 2 layers of glass, replaced 238,1 1,50 Windows, 2 layers of glass, old 119,1 3,0 External door 6,56 2,50 Stairwell window 53,96 2,80

Energy efficiency. Thermal bridges

• Energy demand on heating: 160 kWh/m y² 6

Thermal bridges (current) Lenght (m) Value (W/mK) H (W/K)External wall - ext. wall, outside corner 175,94 0,5 87,97Ext. wall - ext. wall, inside corner 121,4 -0,2 -24,29Floor - ext. wall 102 0,4 40,68Roof - ext. wall 102 0,4 40,68Windows and doors perimeter 837 0,4 334,80Ext. wall - intermediate ceiling 407 0,3 122,04Balcony - ext. wall 118,8 0,6 71,28      673,16

Energy efficiency. Thermal bridges solutions• Bring windows out into the insulation layer• Insulate balcony slab• Quality of construction works

7

Energy efficiency. Insulation• Foamglas® insulation – Low environmental pollution– 66% recycled glass– Only renewable energy is used

8

9

Energy efficiency. Windows and doors• Triple glazed windows U=0,78• Double glazed in basement and stairwell U= 1,0• Stairwell facade• New entrance doors • Balconies are glazed with tempered glass

Energy efficiency. Energy Management effect

• Energy demand on heating: 26 kWh/m y² 10

Construction U-valueRoof 0,10External walls 0,15Basement ceiling 0,15Windows, U=0,78 0,78Windows, U =1,0 1,00Entrance doors, U =1,0 1,00

 Thermal bridges (after) Lenght (m) Value (W/mK) H (W/K)External wall - ext. wall, outside corner 175,94 0,1 17,59Ext. wall - ext. wall, inside corner 121,4 -0,1 -12,14Floor - ext. wall 102 0,02 2,03Roof - ext. wall 102 0,1 10,17Windows and doors perimeter 837 0,01 8,37Ext. wall - intermediate ceiling 407 0,05 20,34Balcony - ext. wall 118,8 0,1 11,88 Total     58,24

Energy efficiency. Costs• First option 477 000 € – Foamglas® insulation

• Alternative option 246 000 €– Rockwool insulation

11

Building services• Heating system;• Water recycling system;• Ventilation system.

12

Building services. Heating system

How do we improve the temperature control in our project?1. Radiator 2. Valve 13

What is district heating?How does district Heating work?

District heating is friendly for environment ?

Building services. Water recycling system

Advantages and disadvantages

How to utilize the rain water?

14

15

Building services. Ventilation systemMechanical exhaust ventilationHow it works?

Some examples of design:

Green roofs and facades• Green roof Benefits: • Stemming the flow of water off a roof;

• Noise reduction• Blocks out UV light• Lessens heat gain• Additional layer of thermal insulation • Green space in a city.• Absorb the high levels of carbon dioxide 16

Green roofs and facades• Green roof TechnologyVEDAFLOR ® green roof Plus9. Sedum, small vegetation

8. Light mineral substrate E (thickness 8-10 cm)7. Drainage mat / vegetative plate (thickness 20mm)6. Distinctive layers of polyethylene film (thickness 0.2 mm)5. Bituminous coating VEDAFLOR ® WS-I - Root penetration resistance second waterproof layer4. Bituminous coating VEDAFLOR ® WS-U - root penetration resistance first waterproof layer3. Foamglas T4+ Slab 2x150 mmFoamglas T4+ Slab 100 mm2. Vapour barrier VEDAGARD ® SK-PLUS 1. Roof deck

17

18

Green roofs and facades• Living wall Function

• Means for water reuse• Plants reduce overall temperatures of the building• Used for urban agriculture, urban gardening, or for its beauty as art• Alleviate sick building syndrome

Green roofs and facades• Living wall Technology

19

Indicative existing structureFSC pressure treated softwood battens

Waterproof membraneANS fixing railsPre-planted before installation Fitted to fixing rails16mm diam. pipeworkANS living wall module Drainage channel

20

Green roofs and facades First option Second option

21

Calculation of investment and returns in passive house and retrofit projects• Financial program • Renovation costs calculation• Cost of energy before and after renovation• Loan and savings calculation• Financial characteristics

22

Calculation of investment and returns in passive house and retrofit projectsType of works Construction costs, €

Ventilation 5 158Water recycling 12 938Heating system 18 698Green roof+ facade 219 616

Walls, roof, basement wall and floor, windows 476 011TOTAL 786 268Support program 30% 235 880TOTAL 550 387

23

Calculation of investment and returns in passive house and retrofit projectsCosts, € Heating needed (kWh/m *y)²

 13,56 159,63 Before renovation2,22 26,18 After renovation11,34 133,45 Savings on heating

24

Calculation of investment and returns in passive house and retrofit projects

Calculation of investment and returns in passive house and retrofit projects

25

Financial characteristics• Payback period 22 years•NPV 21, 042 €•ROI 3,76 %

Conclusion

26

Outcomes• Changes in tenant energy expenditure • Changes in carbon emissions for the environment • Health impacts on tenants and associated costs saved to society • Tenant comfort levels • Community effects

27

Thank you for your attention