Energy Efficient and Passive House Building Design Guidelines Part 5 : The Building Mass Avoiding Cold Bridges Part 6 : Ventilation Manual or Mechanical Air Exchange Case Study Passive house renovation of multi-family apartment block, Brno, Czech Republic Building Energy Efficiency Project Mongolia / UNDP/GEF Ulaanbaatar, Mongolia August 2011
Czech Republic Brno, Nový Lískovec Layout study: -Strategies for the ecological rehabilitation of 3 typical panel buildings in Brno - Flexible model for energy-efficient refurbishment of prefabricated housing - Apply model according to situation and funds - Apply in Central, East and Southeast Europe
Nový Lískovec Status Quo In this area, the following measures are planned:
Nový Lískovec Picture 1: Seesaw Picture2: Lithophon Picture 3: Garden Picture 4: Sport facilities Picture 5: Playground Picture 6: Biotop
Parking possibilities Nový Lískovec
Strategies for building 1 Oblá 15-19 Total area: 3,391.7 m2 4 floors and 36 apartments
Strategies for building 1 Oblá 15-19 Low Energy Strategy (winter garden with additional roof floor and warm water collectors)
Strategies for building 1 Oblà 15-19 - insulation - new windows - winter garden with additional roof floor - circular air ventilation - optimal use of winter sun - protection against summer sun - warm water collectors
Strategies for building 2 Oblà 5-13 Total area: 5,483 m2 4 floors and 60 apartments
Strategies for building 2 Oblá 5-13 Low Energy Strategy Apartment zoning
Pilot Project, Brno, Czech Republic
Total Site (CELKOVY POHLED) Total Site (CELKOVY POHLED)
Pilot project: Oblá 14 Project cost: CZK 21 million ( 667,000) Subsidies: CZK 6 million ( 190,000) 000) 3,249 m² gross floor area 8 floors 32 apartments
Old View East Old View South PUVODNY POHLED VYCHODNY PUVODNY POHLED JIZNY
Old Ground Floor Old Regular Floor TYPICKE PODLAZI PUVODNE TYPICKE PODLAZI PUVODNE
Our Solutions NAVRHOVANE RESENI 1 thermal insulation -20cm EPS on outside of existing pre-cast concrete panels -existing structure acts as thermal storage mass
Our solutions NAVRHOVANE RESENI 1 WÄRMEDÄMMUNG 2. New windows - high quality thermal glazing U= 1.1 W/(m2.K)
New insulation layer Existing pre-cast concrete exterior wall panels Overlap window frame 3-5cm to minimize thermal bridge
Old windows New thermal windows
Our solutions NAVRHOVANE RESENI 1 WÄRMEDÄMMUNG 2 NEUE FENSTER 3 New service cores -compact layout around vertical service shaft -adequate space for ventilation ducts
Bath WC Dropped ceilings for supply air ducts to main rooms Vertical service shaft Kitchen Supply air Return air
Access to service shaft in WC room
Our solutions NAVRHOVANE RESENI 1 WÄRMEDÄMMUNG 2 NEUE FENSTER 3 SANITÄR 4 New balconies -metal balconies hung from steel brackets to reduce thermal bridge.
Metal hangers and Metal hangers and spacers to minimize thermal bridge
Our solutions NAVRHOVANE RESENI 5 Air ventilation system -high efficiency ventilation system with heat recovery and fresh air pre-warming -Air supplied to the apartments has a base temperature of 18 which can be further warmed by registers in the individual apartments
Air register with warm water heating coils for individual regulation of apartment warm supply air temperature Programmable thermostat g for setting time and temperature for each individual room.
Our Solutions NAVRHOVANE RESENI 1 WÄRMEDÄMMUNG 2 NEUE FENSTER 3 SANITÄR 4 BALKONE NEU 5NEUE LÜFTUNG 6 Solar measures
Our solutions NAVRHOVANE RESENI 1 WÄRMEDÄMMUNG 2 NEUE FENSTER 3 SANITÄR 4 BALKONE NEU 5NEUE LÜFTUNG 6 SOLAR MAßNAHMEN 7 Warm water collectors -collectors mounted vertically on south facade to increase winter efficiency
SOLAR WARM WATER COLLECTORS
Our solutions NAVRHOVANE RESENI 1 WÄRMEDÄMMUNG 2 NEUE FENSTER 3 SANITÄR 4 BALKONE NEU 5NEUE LÜFTUNG 6 SOLAR MAßNAHMEN 7 WARMWASSER KOLLEKTOR 8 Air collector -Fresh air is drawn in through south-facing, dark perforated metal panels
WARM AIR COLLECTOR Conceptual diagram
WARM AIR COLLECTOR
Insulated supply/return air ducts Solar Hot Water Collectors Air handling / heat recovery Solar hot water storage tanks Warm Air Collectors to prewarm supply air
Our solutions NAVRHOVANE RESENI 1 WÄRMEDÄMMUNG 2 NEUE FENSTER 3 SANITÄR 4 BALKONE NEU 5NEUE LÜFTUNG 6 SOLAR MAßNAHMEN 7 WARMWASSER KOLLEKTOR 8 LUFT-KOLLEKTOR 9 TWD Transparent insulation on south building face
TRANSPARENT INSULATION
BUILDING ENERGY PERFORMANCE SIMULATION Comparison of different measures Picture 1: Energy use in the first thermal zone (8 residential floors) for the 6 calculated variants Picture 2: Specific energy demand in the first thermal zone (8 residential floors) for the 6 calculated variants VARIATION 0: Original building VARIATION 1: Var. 0 + Insulation VARIATION 2: Var. 1 + Window replacement VARIATION 3: Var. 2 + Additional floor on roof VARIATION 4: Var. 3 + Air ventilation system VARIATION 5: Var. 4 + Heat recovery from exhaust air
Efficiency and temperature in rooms north, floor 8 (zone 2) Efficiency and temperature in rooms west, floor 8 (zone 3) Efficiency and temperature in corner rooms north/west, floor 8 (zone 1) external air ( C) nessessary incoming temperature nessessary heating efficiency
Low Cost and Low Energy Housing in Tukums, Latvia
Dimensions: 74 flats (39 are social flats) and 106 inhabitants Total built-up area including the loggias 2,887.9 m² Total heated area 2,625.5 m² Basement area 645.5 m² Shop area 24.9 m² General height h of the ceiling 2.53 m Height of the ceiling in flats 2.50 m
Payback Period New specific energy demand: 120 kwh/m² Payback Period DH Life Time VARIANT 2 - MARKET POTENTIAL [years] [years] Heat insulation (walls 12 cm/ceilings 20 cm) 30 30 substitution of windows U=<2,5 W/m²K 34 30 Thermostatic valves for heating elements 5 20 Heating Refurbishment 25 20 TOTAL VARIANT 2 26 New specific energy demand: 22 kwh/m² Payback Period DH Life Time VARIANT 1a - TECHNICAL POTENTIAL/PASSIVE [years] [years] Heat insulation (walls 20 cm/ceilings 30 cm) 24 30 substitution of windows (U=0,7 W/m²K) 27 30 Controlled air ventilation + Supply air solar collector 13 20 TOTAL VARIANT 1a 16
Conclusion Passive-House technology is feasible Passive-House technology is especially relevant for the north European countries Passive-House technology can also be implemented in Low- Energy Housing User behaviour has to be taken into account
Energy Efficient and Passive House Building Design Guidelines Thank you for your attention! Thank you for your attention! Building Energy Efficiency Project Mongolia / UNDP/GEF Ulaanbaatar, Mongolia August 2011