Passive house and solar design
Transcript of Passive house and solar design
Operable Louvres
Cross Ventilation
Roof Overhang
Retractable External Shading
Stack Ventilation
Maximised Indirect Daylighting
Zinc Cladding
High Thermal Mass
Solar PV Panels
High Performance Insulation
Extensive Green Roof
High Performance Triple Glazing
Sliding External Shutter
Trombe Wall
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Annual Dwelling Energy Balance
Heat-Pump Solar Thermal Pump PV Generated
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ASHRAE 55 Adaptive Model Comfort Statistics
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Overheating Metrics
Illuminance Diagram (21st Dec) - Upper FloorIlluminance Diagram (21st Dec) - Ground Floor
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Daylight factors for each room meet and exceed British Standard averages, allowing decreased dependence on artificial lighting systems.
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ASHRAE 55 Adaptive Comfort Model
Air temperature °C ASHRAE 55 Adaptive Model Comfort Bounds
MSc Environmental Design and Engineering
Building Solar Design Project – BENVGEE3
UCL Institute for Environmental Design and Engineering
Annual temperature profiles show improvements with each modelling iteration. The extreme variation in Washington’s climate conditions meant our dwelling had to be designed to counteract extremely low temperatures in the winter whilst preventing overheating in the summer. The final thermal model shows an internal temperature range of 17–27OC, tempered from the external temperature range of -16–37OC
Thermal comfort improvements established by the criteria set on ASHRAE 55.2013 Adaptive Model for free-running naturally conditioned spaces show that 93% of all daily hours fall within the 80% comfort bounds of the adaptive model.
Daily mean temperatures for the year fall within the thermal comfort criteria set by the ASHRAE adaptive model for free-running naturally ventilated buildings, based on the outdoor prevailing mean temperature.
Net-zero energy is achieved by reduced energy demands from passive heating and cooling, efficient lighting systems, and solar PV and hot water heating.
To assess the propensity of the dwelling to overheat in the summer, the CIBSE TM52 overheating metrics were used as a benchmark.
On average, the temperature profile is within the competition week comfort bounds 95% of all daily hours between October 6 and October 12. Temperatures outside the comfort range are at a maximum of 1.25OC outside the bounds.
High Performance Thermal Envelope with Small Ope ings to East and West, and Medium Sized Openings to North for Cross Ventilation and Indirect Daylighting
Solid and Monolithic Architecture Language
High Thermal Mass
Protective Skin
Open Plan/ Flexible Interior
Southfacing PV System
Southfacing Glazing and Trombe Wall for Solar Heat Gain and Views
Timber Deck and Shading(Overhang and Adjustable Shading)
LEGEND:
1 Lounge Nook2 Dining Nook3 Reading Nook4 Climbing Wall5 Play Nook6 Writing Nook7 Parents Nook8 Kids Nooks
Vegetation on Roof and in Courtyard
Modular Built-in Furniture
Flexible Wall Systems
Lightweight Upper Floor and Playnet
The Thompsons
THE NOOKALEXANDER CLIGMAN-HOWE. NICOLE IGNACIO. KANCHANOK SUWANCHOTE. JULIANE WOLTER
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LocationThe building is located on the southern side of Van Ness Street NW, and is surrounded by neighbouring residential buildings on the east and west. The south features views to the backyard, and undeveloped land adjacent to a church and a large residential development. The west-east orientation of Van Ness Street NW provide ideal conditions for a passive design approach.
BriefThe family was interested in a sustainably designed home that would provide shelter as well as flexibility, as the needs of their young family change over time. Scale and playful elements were important to the Thompsons – they wanted to ensure that their young children would find spaces to play without feeling overwhelmed by large, overwhelming rooms. The Nook was born out of the design themes of flexibility and playfulness.
DesignThe Nook features a solid, monolithic envelope which acts as a protective shell against unwanted solar gains from the west and east elevations, and from undesirable winds from the northwest. While there are a limited number of small windows on the east and west facade to provide natural daylighting and to prevent overheating in summer, the north-facing vertical windows are sized to maximise indirect daylighting and facilitate the building’s natural ventilation strategy. The dwelling was designed with large south-facing glazing to capture predominant southern winds for natural ventilation, passive solar gains, natural daylight, and views to the backyard garden.
Despite the sharp and strong aesthetic provided by the exterior monolithic façade, a softer, more informal and relaxed lifestyle is encouraged by the open layout and the use of timber, fabric, and concrete on all internal elements and the southern timber roof extension. The layout has been designed to focus on flexibility and adaptability of the living spaces during the day, passive heating and cooling throughout the year, and as the family grows with the dwelling. Various cosy nooks provide spaces for rest, play and privacy for the family. Movable wall systems increase the flexibility of room use.
is a passively heated and cooled net-zero energy home, with solar PV panels and evacuated tubes for domestic hot water providing enough electrical and thermal energy to offset the dwelling’s annual plug loads and domestic hot water demands. A monitoring system will be installed to measure the use of electricity, as well as temperature and humidity.
THE THOMPSONS
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GRANDPA TOMMY MOM DAD TAMMY
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THE NOOK
RoofStanding Seam Zinc Cladding12mm Marine Grade Plywood30x50mm Timber BattensBreathable Membrane220mm PIR InsulationVapour Barrier150mm Reinforced Concrete
External WallStanding Seam Zinc Cladding12mm Marine Grade Plywood30x50mm Timber BattensBreathable Membrane220mm PIR InsulationVapour Barrier150mm Reinforced Concrete
HALL
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Floor200mm reinforced concrete(polished)Vapour barrier200mm PIR Insulation
CROSS SECTION B
RoofStanding Seam Zinc Cladding12mm Marine Grade Plywood30x50mm Timber BattensBreathable Membrane220mm PIR InsulationVapour Barrier150mm Reinforced Concrete
External WallStanding Seam Zinc Cladding12mm Marine Grade Plywood30x50mm Timber BattensBreathable Membrane220mm PIR InsulationVapour Barrier150mm Reinforced Concrete
HALL
HALL
Floor200mm reinforced concrete(polished)Vapour barrier200mm PIR Insulation
CROSS SECTION B
Floor200mm reinforced concrete(polished)Vapour barrier200mm PIR Insulation
Sun Path21st Jun
Sun Path21st Dec
Summer Wind 5.90 m/sWinter Wind <8.50 m/s
Park Views
Summer Wind 9.00 m/sWinter Wind 9.00 m/s
Traffic Noise
Neighbour
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Site Access
FIRST FLOOR PLAN 1:100
SITE PLAN / 1:500
OCCUPANCY SCHEDULE
EXPLODED AXONOMETRIC CONCEPT DIAGRAM GROUND FLOOR PLAN 1:100
STREET VIEW
SOUTH ELEVATION 1:100
DETAIL SECTION 1:20 GARDEN VIEW
ENVIRONMENTAL CONCEPT SECTION 1:50
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ANALYSISPROJECT DESCRIPTION
www.bartlett.ucl.ac.uk/iede @UCL_IEDE
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