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Architype - Standardised Passivhaus Schools, Ecobuild UK 2014

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Information about Architype - Standardised Passivhaus Schools, Ecobuild UK 2014
Design

Published on March 7, 2014

Author: ElrondBurrell

Source: slideshare.net

Description

Presentation on Architype's development of a standardised approach to design & construction of Passivhaus Schools given on the Trada Stand at Ecobuild UK 2014, in the context on the UK Government's to standardise school buildings.
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Standardised! Passivhaus! Schools Elrond Burrell, Architype

Be Social #Sustainability #Passivhaus #Timber @ElrondBurrell @TRADA_ @ArchitypeUK @Ecobuild_Now

We design Life Enhancing! Genuinely Sustainable Architecture

Standardised to bring to or make of an established standard size, weight, quality, strength to compare with or test by a standard to chose or establish a standard for

Why Standardise? To save money To save time To guarantee performance

To Save Money

To Save Money In austere economic times this is surely a good thing? With limited money available standardising means MORE schools can be built BUT…

To Save Money Is reducing capital cost the only issue? Minimising construction cost now, may increase long term or future costs SURELY … we should be looking at whole life costs?

To Save Time

To Save Time To avoid wasting time is surely a good thing? Schools should focus on teaching, not designing new buildings BUT…

To Save Time What about… The education value of pupil and teacher involvement in the design process? The importance of buildings meeting the practical needs and expressing the character of the individual school and community?

To Guarantee Performance

To Guarantee Performance Again – surely a good thing To guarantee energy consumption, internal comfort and user satisfaction BUT…

To Guarantee Performance Do any of the standardised solutions achieve this? – are they even trying? What energy standards are being set? What comfort standards are being set? How are these being delivered? Can they be guaranteed?

Why Standardise? To save money To save time To guarantee performance

To Save Time

To Save MAKE Time

To MAKE Time “The community love their building, they feel it belongs to them, the respect it and care for it” “The layout really works for us, because the architects listened to our ideas and responded to our ethos and practical needs” “The building has helped us move from Satisfactory to Good in our latest Ofsted”

To MAKE Time

To Guarantee Performance

To Guarantee Performance Most school buildings do not perform in terms of user comfort Most school buildings use 5+ times as much energy as predicted HOW do we change this?

To Guarantee Performance Monitor buildings and learn from our mistakes Support users in occupying their buildings Avoid tick box compliance processes Set standards + Use techniques that will deliver them

A-Typical Summer Profile Shape Major electrical use before building is occupied, in both summer and winter (6 cleaners arrive @ 5am) substantial energy use when building is or is nearly empty in morning Admin staff arrive at 7:30am, teaching staff arrive between 8 - 8:45 Occupied Days Unoccupied Days Baseload Half-hourly Electrical Demand Profiles

What is Passivhaus?

What is Passivhaus? Rigorous energy standard Rigorous comfort standard Rigorous quality assurance standard

solar thermal photovoltaics Heating energy 120 kWh/m2 Primary energy 300+ kWh/m2 Consumption and carbon emissions offset by renewables gs heat pump Biomass

Heating energy 15 kWh/m2 Primary energy 120 kWh/m2 0.6 ac @ 50 pascals 0.6 ac @ 50 pascals energy consumption and carbon emissions reduced simply by using less energy! gas boiler

Passivhaus Standard 310 kWh 189 kWh Primary energy Thermal Heating 120 kWh 120 kWh 105 kWh 15 kWh

Passivhaus Standard 310 kWh 189 kWh Primary energy Thermal Heating 120 kWh 120 kWh 105 kWh 58 kWh 43 kWh 15 kWh 15 kWh Passivhaus buildings are performing BETTER than predicted

Passivhaus Standard 310 kWh 189 kWh Primary energy Thermal Heating 120 kWh 120 kWh 105 kWh 58 kWh 43 kWh 15 kWh 15 kWh Passivhaus buildings are performing BETTER than predicted

Achieving Passivhaus? Meet a series of technical standards o  fabric U-values of 0.15 and windows/doors of 0.8 o  airtightness of 0.6 @50 pascals o  elimination of thermal bridging Model the building using PHPP o  o  o  o  optimise the orientation, form and fabric prove within thermal energy limit of 15 kWh/m2.a prove within primary energy limit of 120 kWh/m2.a confirm within limits of overheating Undergo the rigorous certification process

Adopting Passivhaus? It’s based on sound building physics and evidence It’s based on reducing energy by design, instead of offsetting carbon with add-ons It encourages integrated design thinking + rigorous discipline It drives simplicity of form, detailing and construction It works!

Achieving PH Schools Oakmeadow Primary School Bushbury Hills Primary School

Optimising the Form 14m deep 14m deep 18m deep Single storey 22m deep 22m deep face E/W 22m deep 22m deep face E/W 18m deep Two storey

Optimising the Form Ground floor plan: Oakmeadow Primary School

Optimising the Form Section: Oakmeadow Primary

Insulation Insulation Load Load Design Out Thermal Bridging Structural slab Structural slab Insulation Insulation Model & Test every detail

Insulation Insulation Load Load Design Out Thermal Bridging Structural slab Structural slab Insulation Insulation Model & Test every detail

Design Out Thermal Bridging Keep structure within the thermal envelope

Design Out Thermal Bridging OR Keep structure outside the thermal envelope

Design In Airtightness By simplifying every detail

Optimise SG & Ventilation Simple efficient window arrangement Simple secure night ventilation grilles

Optimise MVHR & Ducts MVHR Fresh air supplied to all main rooms

Collaborate Across the whole team - consultants, specialists, client, contractor, and supply chain

Delivering Design Quality No compromise of brief, client aspiration, architectural quality or sustainable materials palette

Conclusion

AUXILLARY AREAS STORAGE Possible Access Hatch MULTI-USE AREAS PLANT ROOM COMMUNITY FACILITIES 26.8 CIRCULATION 16.7 B A CIRCULATION FIRST FLOOR Total Gross Internal Area 44.3 Sq m CANOPY KITCHEN FOOD PREP STO. 1.1 CARETAKER/ CLEANER STORE CENTRAL STOCK ROOM YEAR 2 BARRIER MATTING BARRIER MATTING WET AREA WET AREA Possible future folding partition LOCKERS 12.5 KEY STAGE 2 HUB SPACE SOFT READING AREA 4.5 SPECIAL STORE PRACTICAL AREA 152.8 KS2 BOYS TOILETS 9.1 STAFFROOM HEAD OFFICE/ MEETING ROOM 18.1 BARRIER MATTING LOBBY KS2 GIRLS TOILETS 9.1 10.2 LOCKERS MAIN RECEPTION/ WAITING AREA SERVER LOCATION (TBC) CIRCULATION 32.6 LOCKERS SEN THERAPY/ MI ROOM 2.2m FOLDING PARTITION YEAR 1 REPRO. COMMU. STORE C 8.3 CIRCULATION LOCKERS LOCKERS INTERVIEW ROOM LIBRARY AREA SPEC. STORE ACC. ACC. TOILET TOILET 78.6 11.6 GROUP ROOM SENco LOCKERS KEY STAGE 1 HUB SPACE LOCKERS SHOWER TROLLEY Nom. 1950 x 750mm HYGIENE ROOM ICT AREA FOOD TECHNOLOGY CIRCULATION OPENING ROOF LIGHT GENERAL OFFICE COMMUNITY ROOM BARRIER MATTING YEAR 3 BARRIER MATTING WET AREA YEAR 4 WET AREA BARRIER MATTING 6.7 CANOPY CANOPY CANOPY GROUND FLOOR Total Gross Internal Area 1427.6 Sq m A BARRIER MATTING RECEPTION TOILETS READING AREA GROUP ROOM MAIN HALL YEAR 5 2.2m FOLDING PARTITION KS1 KS1 GIRLS BOYS TOILETS TOILETS YEAR 6 9.8 LOW LEVEL PARTITION NURSERY TOILETS WET AREA OFFICE STAGE/ SPECIAL STORE LOW LEVEL PARTITION C BARRIER MATTING WET AREA TOILET RECEPTION B 79.3m! SERVERY/ CHAIR STORE PE. STORE WET AREA BARRIER MATTING DRY STORE LOBBY LOCKERS BARRIER MATTING 2.2m FOLDING PARTITION NURSERY CLOAKS BARRIER MATTING WET AREA CLOAKS CANOPY

To Guarantee Performance “We feel that our children are more alert and attentive in lessons due to the amount of daylight in classrooms and the fresh air throughout the school. The fact that the new school is built to passivhaus standards means that learning has been enhanced. Our pupils are comfortable, secure and stimulated by their new environment; hence they learn very well!” Sara Morris: Head Teacher, Oak Meadow Primary School

To Guarantee Performance “Our gas bill was 90% less in the first year of occupying our new building, compared to the old one” Sara Morris: Head Teacher, Oak Meadow Primary School

To Save Money Capita Symonds ‘typical sustainable school’ £2,151/sqm (M&E £454/sqm) St Luke’s 2009 BREEAM Excellent £2,080/sqm (M&E £357/sqm) Oakmeadow Passivhaus School £1,780/sqm (M&E £323/sqm) Standardised Passivhaus School <£1,550/sqm (M&E <£300/sqm)

Why Standardise Schools? To save money? ü  YES, but focus on SIMPLICITY to achieve better value not just CHEAP To save time? Ø  NO, if this means negating the value of engagement in the process To guarantee performance? ü  YES, by setting PASSIVHAUS as the only evidence based standard that works

Standardised Passivhaus Basing design on the evidence of what actually works Striving for simplicity of design to deliver more for less Image: Albert, Righter and Tittman Architects

www.architype.co.uk

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