The Effect of Facades on Outdoor Microclimate Jonathan Fox PhD - - PowerPoint PPT Presentation

The Effect of Facades on Outdoor Microclimate

Jonathan Fox PhD Candidate Faculty of Built Environment UNSW Australia

Croucher Advanced Study Institute Hong Kong 7-11 December 2015

Research Context –

2014: 54% 3.9 billion 2050: 66% 6.3 billion

Quantifying the impact of climate change on extreme heat in Australia by Will Steffen (Climate Council of Australia). 2015

2887

heatwave deaths in Australian cities 1890 - 2013

89% 93% 5 million

current and projected 2050 Australian urban population. Projected Sydney population in April 2016

0.5m 1.9m 18% 19%

current and projected 2055 Australian population over 85yo; projected % over 65yo and % 65yo living in cities

Data Collection - instrumentation

2014: 54% 3.9 billion 2050: 66% 6.3 billion

Variables Platform Sensors and Instruments Local meteorological parameters

• 3 x net radiometers (Hukseflux NR01)
• 38mm grey-globe thermometer (Pt100/RAL7001)
• 3-axis ultrasonic anemometer (Gill WindMaster)
• Shielded temp and RH sensor (Rotronic HC-S3)
• Barometric pressure sensor (Vaisala PTB 110)
• Pyrano-albedometer (Middleton Solar SK16)

Thermal

• FLIR B335, f = 10mm, 45o (IFOV: 2.59 mrad/pixel)
• IR resolution 320 x 240 pixels (DC 2048 x 1536)
• FPA uncooled microbolometer: 7.5 – 13μm
• IR accuracy: ±2°C or 2% of reading
• IR sensitivity: 0.05°C @ +30°C

Spectral albedo

• Tetracam ADC multispectral camera
• 3.2 megapixel CMOS sensor 2048 x 1536 pixels
• 3 wavebands 0.52-0.90μm (Red: 0.52 - 0.60μm:

Green: 0.63 - 0.69μm; NIR 0.76 - 0.90μm)

• f = 8mm (IFOV: 0.54 mrad/pixel)

Study Areas – Sydney Case Study Areas

ABS Nearmap 17 November 2015

H:17.5 W:21 H:24.5 W:18

C1 C2

LCZ 2 Compact Midrise LCZ 4 Open highrsie Ultimo Zetland

H/W:1.3 H/W:0.8

• Sydney Latitude 33°51’ S Longitude 151°12’ E 4.76 million people in June 2013
• Population density in inner city Pyrmont/Ultimo: 14 300 p/km2

ABS 2013

• Spatially “representative” urban and suburban canyons in metropolitan Sydney

Data Processing and Analysis – Thermal Model (F1)

2014: 54% 3.9 billion 2050: 66% 6.3 billion Workflow Methods

• Orthomosaic

Photogrammetry

• Georeferencing

ArcGIS (ArcMap)

• Cell-based

analysis Spatial Analyst Tool

• Raster Analysis

Spatial Modeling and linear regression

Georeferenced base plan . shp file

2014: 54% 3.9 billion 2050: 66% 6.3 billion

Data Processing and Analysis – MRT Model (M3)

Ground albedo 0.136 av Wall surface temperature 28oC av Ground surface temperature 29.32oC av 19.11.2015 9:45‐10:05am KENSINGTON, NSW,‐33:54:16, ‐151:12:50 10am ‐ AZI:63o 10am ‐ ALT:63o

The Effect of Facades on Outdoor Microclimate

jonathan.fox@unsw.edu.au

Thank you!

www.sbe2016sydney.org