Passivhaus in Australia

Transcription

1 Passivhaus in Australia relevance to natural cooling Presentation by Kylie Mills Registered Architect - NSW ARB 7511, Director, Teacher, Tutor AIA A+, Director - Australian Passive House Association National Energy Efficiency Conference 19 th November 2018

2 FAST DIPPED IN UGLY SAUCE WITH HASTE AND CARELESSNESS CHEAP TRASH GO AWAY YOU GET WHAT YOU PAY FOR IMPOSSIBLE UTOPIA JUST IN TIME TO BE TOO LATE FREE TRY AGAIN GREAT

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4 Why do we still need ventilation in buildings when we ve got windows? Gap ventilation (infiltration) is bad Uncontrolled quantity and quality Building structure damage due to moisture transfer Reduces effective insulation performance Purge ventilation via windows Variable quantity PHI research showed windows need to be opened 4 times a day at 6 hr intervals to achieve reliably good IAQ. (Feist 2003). Potential for noise and dust infiltration, and security issues. Include operable windows in designs!...for optional use

5 A European Standard

6 Passive House Newest methods being talked about in Australia for achieving significantly reduced energy use from a building passive house - isn t actually that new Passivhaus design principles were initially pioneered in the 1970s, the following decade that the performance was quantified by the PassivHaus Institute in Germany in the mid 1980 s China s Bruck House Apartment Complex Cuts Energy Use by 95% designed by German architecture firm Peter Ruge Architekten Works in all kinds of buildings including residential and commercial buildings

7 Passive House types

8 Passive House principles 1. thick thermal insulation in the walls and roof, especially, 2. an airtight envelope 3. elimination of thermal bridging 4. high-performance windows - usually require double glazing or greater 5. a focus on heat-recovery ventilation, particularly mechanical ventilation for optimized indoor air quality and mitigation of moisture concerns Heating / cooling generation by various means Air based or hydronic distribution

9 Passive House Heating/Cooling Supply Mechanical Ventilation Heat Recovery (MVHR) A MVHR is not a heating system nor is it an air conditioning system. It can and does minimise the heat losses from within a building Indoor air quality, which should be exceptionally good in Passivhaus buildings enables one to breathe easy inside the building, reducing the risk of health issues Designed to maintain a comfortable temperature range year round within a building

10 on Cooling Where the frequency of internal temperatures above 25 C exceeds 10% of the year additional measures are required to protect against summer overheating. Cross ventilation through open windows and night purge ventilation strategies may be incorporated as part of the Passivhaus cooling concept when appropriate. Where such strategies are not possible Passivhaus permits up to 15 kwh/(m²a) of additional cooling energy to be used. Such a small cooling load has proven to be sufficient in almost all cases because the Passivhaus concept is highly effective in reducing unwanted heat gains. Maxa Design Consortium Builders Lovell Chen

11 How does it work? ducts duct bends silencers distributor outdoor grilles indoor grilles/valves adapters

12 ERV/HRV

13 Passive House Is Building science Is a more natural way to condition buildings Health Enables healthier indoor air environments Can reduce temperature swings with thermal mass Uses daylight as primary light source Wellbeing Comfortable Buildings = Happier Productive Building Users Energy Controls glare through good design Ensures gaps are sealed for airtightness Good IAQ Can generate solar electricity and more!

14 School Classroom Ventilation Critical example High occupancy (= high OA requirements) Common use of natural ventilation solutions (lots of evidence suggesting under-ventilation) Low awareness /ability for occupants to respond to poor IAQ if underventilated

15 Residential Ventilation

16 In Australia There are: 12 certified passive house buildings in Australia 70 buildings that APHA know are under design/construction categories Looking to see this increase in number of certified passive house buildings over the next 2-4 years There are increasing numbers of certified passive house designers (98) and tradespeople (80) each year Looking forward to components being certified passive house to become more competitive with the current market

17 Residential CPH Heathmont Victoria Maxa Design Home features: unique saw-toothed ceiling for natural light and dramatic effect lofty ceilings, pv solar panels, water tank storage, high-level home insulation, and imported high-spec triple glazed windows

18 Australian Educational Building - Victoria CHANCELLERY Image: ARM

19 Australian Educational Building - Victoria TEd Grimshaw

20 Peninsula Student Accommodation 150 student rooms Rooftop solar: 270 panels 1 MVHR: Zehnder ComfoAir XL 3300

21 Peninsula Student Accommodation Site photo in late September 2018

22 Peninsula Student Accommodation 150 Single Occupancy Units Support Staff Residences (x2) Floor Lounges for Building Residents Communal Space for 250 Student Residents on Campus 6,500m 2 GFA Target for Passive House Certification on Delivery Cross Laminated Timber Structure

23 Australian Residential Apartments The Fern HRV at the Fern during installation Before sheeting

24 The Fern

25 Warehouse in Queensland

26 Other buildings Certified Passive House Warehouse by Jordan Parnass Digital (JPDA) Sri Lanka 2018 Certified Passive House, Off grid research Office Building by MBRSC - Mohammad Bin Rashid Space Center Dubai 2016 The House at Cornell Tech on Roosevelt Island is the world s tallest Passive House, New York 2018 Karawitz Ile-de-France 2010

27 We need European Appliances, stone benchtops, and recessed downlights. That s what sells these days. The Future We need double glazing, solar panels, and HRV. That s what sells these days.

28 Why? They can look like any building style you desire Passive solar design principles apply to passive house buildings They can be net zero, or nearly net zero Passive house can be designed for cold, cool, warm, and hot climates, and anywhere in between Preserves our natural resources, future generations will know we understood what sustainability really means A certified passive house does what it says on the box, plus comfortable and healthy to be in year round

29 Thank you Useful information: Australian Passive House Association Passive House Planning Package (PHPP) Energy balance tool for energy evaluation, heating load and summer comfort