Cool roofs

Alternate Term Label:
White roofs
NARROWER TERMS:
Report

Above-roof temperature impacts on heating penalties of large cool roofs in Australian climates: final report

This report outlines the key outcomes of research project RP1037u1 ‘Above-Roof Temperature Impacts on Heating Penalties of Large Cool Roofs in Australian Climates’, an extension to project RP1037 ‘Driving increased utilisation of cool roofs on large-footprint buildings’. The research has been focused on two key...
Report

Above-roof temperature impacts on heating penalties of large cool roofs in Australian climates: interim report

This is the first interim report for project RP1037u1, an extension to the recently completed project RP1037 ‘Driving increased utilisation of cool roofs on large footprint buildings’. Progress so-far in the project and preliminary findings have been summarised in this report. The research has been...
Report

Driving increased utilisation of cool roofs on large-footprint buildings: final report

Cool roof technology is known to reduce the cooling energy consumption of conditioned buildings during hot periods, and widespread implementation of such roofs in a neighbourhood or precinct can mitigate the urban heat island effect. Established building energy modelling techniques are able in principle to...
Conference paper

Characterisation of the air temperature field above large-footprint buildings – full-scale experiments and large eddy cfd simulations

The implementation of ‘cool’ roofing materials, with high solar reflectance and infrared emittance, has received significant attention in recent years, as a method to mitigate the urban heat island effect and reduce building cooling energy requirements. The effect of ‘cool’ roofs on heat transfer through...
Article

Urban heat: can white roofs help cool world’s warming cities?

Light, reflective surfaces can have a dramatic impact in cooling the surrounding air – in cities, but in the countryside too. Whitewashed walls, arrays of photovoltaic cells, and stubble-filled fields can all provide local relief during the sweltering decades ahead. But policymakers beware. It doesn’t...
Report

Heat mitigation program: Darwin, Northern Territory

This document presents the mitigation study for the CBD area of Darwin, performed by the High Performance Architecture Group of UNSW, Faculty of Built Environment.The first part of the report includes the methods and the results of the terrestrial and aerial monitoring campaign, the evaluation...
Report

Delivering urban resilience: Costs and benefits of city-wide adoption of smart surfaces across Washington, D.C., Philadelphia and El Paso

This report provides an in-depth analysis of the costs and benefits of applying a set of smart surface solutions1 , including cool roofs, green roofs, solar PV, and permeable and reflective pavements and road surfaces across three cities: El Paso, Philadelphia and Washington, D.C. The...
Journal article

Local measures to mitigate the urban heat island effect in hot and humid climate: comparative case study of Sana’a, Bushehr and Dubai Marina

Cities experience the effect of extra heat compared to their rural surroundings. This phenomenon is known as the Urban Heat Island (UHI) effect. Urban geometry, land cover, landscape and metabolism have been cited as the main contributors to the UHI effect. This paper compares the...
Journal article

A Subambient Open Roof Surface under the Mid-Summer Sun

A novel material open to warm air stays below ambient temperature under maximum solar intensities of mid-summer. It is found to be 11 °C cooler than a commercial white cool roof nearby. A combination of specially chosen polymers and a silver thin film yields values...
Conference paper

Thermal performance of passive techniques for roofs in tropical climate

Problem: Roofs receive the most intense solar heat load among all building envelope surfaces in Equatorial-region. Solar heat gain through roof contributes to a significant portion of building heat load. In tropics where building cooling is needed all-year-round, passive methods to reduce heat gain through...