Case studyLodenareal Passive House Apartment Complex, Innsbruck

By;Sipan Hayran

Supervisor: Haval A. Abdulkareem

CONTENT

1. Introduction

2. Design Intentions

3. In Reality

4. Conclusion

5. Reference

INTRODUCTION

New World‘s largest certified Passive House (in 2009)

Location: Innsbruck / Tyrol

Building use: Social Housing, Building 4, 354 residential units

Architecture: din a 4 & K 2 team architects, on behalf of the Neue Heimat Tirol

Professional planning Passive House: Herz & Lang GmbH

Type of building: Concrete construction with an external insulation system

Energy concept: Pellet, peak gas Solar plant Comfort ventilation

Energy reference area: 26,000 m² (PHPP)

Energy demand: 13 kWh / (m² a) (PHPP) 8 kWh / (m² a) (OIB-Tirolean Passivhaus)

Ecological aspects: renewable energy Pilot Project for Climate Protection and the buildings of the future in Europe

DESIGN INTENTIONS:

Important for us were as a project goal following points:

efficient envelope – low technology – easy to operate – low heating and

running costs – environmental protection – independence from energy

suppliers

In Reality

1. Heating and Hot Water

2. Solar Thermal

3. Ventilation

4. Air Tightness

5. Windows and Shading

6. Work with Residents

7. Thermal envelope

Heating and Hot Water

A central heating located between the two building blocks is dstribuiting heat to the

individual buildings. Heat is generated with a pellets boiler and a gas condensing

boiler, 80% of the annual energy demand is covered by pellets.

Heating Demand: 14.5 W/m²Ka (4.43kBTU/ft²/a). Thanks to the low heating demand

only pheripheral zones of rooms are heated with the floor heating.

The average space heat consumption for all apartments was 17.6 kWh/m²a (in the first year of

measurement) and 16.3 kWh/m²a in the second year of measurement. Adjusted for temperature and

climate, this results in 13.6 kWh/m²a in the first year and 14.6 kWh/m²a in the second year.

Work with ResidentsOne of the objectives was raising awareness on ecological concerns. Anyway, in the

Passivhause-condomnium LODENAREAL, energy consumption remains constantly low,

independent of the user behaviour.

o Solar Thermalo About 1050sq meters of solar collectors are installed on the roofs. This is the

equivalent of about 3swm per flat, The actual energy supply of the solar palnt stands

for at least 350kWh/m2 collector surface.

o The energy generated by the solar plant more than 367.500k/year. The gained energy

is buffered with heat exchangers in 5 resp 6 buffer storages (per substation) with

2.500 litres each, stratified by means of switch valves and then fed into the supply

pipework.

o The buffer storages are completely cased, hollow spaces are insulated with cellulose

flakes, so that energy losses are minimized.

Ventilation•Ventilation is centralized in the basement. The fresh air intake functions through a

ventilation towers with filters in the courtyard at a height of 3 meters. Air is tempered with

cross-stream exchangers.

•Fresh air is supplied into the bed and living room with wall-mounted air diffuser. Due to the

special sound absorber the sound level at the air diffuser level is only about 22db.

Air TightnessAirtightness: 0.20 ACH50.

Windows and ShadingTriple glazed Windows, U-value=0.78 W/m²K (R-

7.5).

THERMAL ENVELOPE

Wall assembly, U-value=0.13 W/m²k (R-43.7)

1 cm plaster finish

24-30 cm EIFS (EPS)

18 cm reinforced concrete

1.5 cm plaster

Roof assembly, U-value=0.11 W/m²k (R-51.6)

10 cm extensive planting

waterproofing

30-36 cm EPS

Vapor barrier

20-31 cm reinforced concrete deck

Basement Floor assembly, U-value=0.12 W/m²k (R-47.4)

Wood flooring

Screed and foil

3 cm impact insulation

20 cm reinforced concrete deck

26 cm insulation

20c

20c

18c

15c

-14c

-14c

U-value=0.78 W/m²K (R-7.5

Solar system

VENTELATION

CONCLUSION

Energy:

Reduction of the yearly production of CO2by 680 tons

80% lower energy demand

Solid construction with a high-standard, airproof building envelope according to passive construction standards

Approx. 1.050 m² solar panels (3 m² / living unit)

Energy consumption < 15 kWh/m² per annum (according to PHPP, "Programm Passivhaus-Projektierungs-Paket”)

Controlled room ventilation / average air-exchange rate 0,35/h

Blower Door-Test resulting in n50 =0,20 (clearly below the requested value of 0,60)

Thermo-conducting cabling in the basement (insulation min. 1,5 times higher than required standards)

Seismic load is transferred to interior staircases

Constructive separation of structural components as prevention of thermal bridges

REFERENCE

http://media.igpassivhus.se/Passive_House_Brochure.pdf

http://www.passivhausprojekte.de/index.php?lang=en#d_1225

https://bruteforcecollaborative.wordpress.com/2010/08/16/phbdw-passivhaus-bau-der-woche-09/

http://www.holzforum-

allgaeu.de/holzforum/allgaeu/web.nsf/gfx/EFD53969CCFF7D3EC1257DCB002D0018/$file/2015.01.12_Passi

vhaus_Consulting_Broschuere.pdf

http://passiv.de/former_conferences/fuenfzehnte/englisch/09_press.htm

http://www.passivehouse.org.cn/zk/gwal/429.html

http://www.buildup.eu/cases/6892

http://www.worldchanging.com/archives/011549.html

http://www.amazon.com/s/ref=nb_sb_ss_c_0_16?url=search-alias%3Dstripbooks&field-

keywords=passive+house+design&sprefix=passive+house+de%2Caps%2C384