A Simple Tool for Estimating City-Wide Annual Electrical Energy Savings from Cooler Surfaces

A Simple Tool for Estimating City-Wide Annual Electrical Energy Savings from Cooler Surfaces

TitleA Simple Tool for Estimating City-Wide Annual Electrical Energy Savings from Cooler Surfaces
Publication TypeJournal Article
Year of Publication2015
AuthorsMelvin Pomerantz, Pablo J Rosado, Ronnen M Levinson
JournalUrban Climate
Volume14
Issue2
Pagination315 - 325
Date Published12/2015
ISSN22120955
Keywordsalbedo, Cool Pavements, Cool surface, Electrical energy saving, pavements, urban heat island, Urban heat island mitigation
Abstract

We present a simple method to estimate the maximum possible electrical energy saving that might be achieved by increasing the albedo of surfaces in a large city. We restrict this to the “indirect effect”, the cooling of outside air that lessens the demand for air conditioning (AC). Given the power demand of the electric utilities and data about the city, we can use a single linear equation to estimate the maximum savings. For example, the result for an albedo change of 0.2 of pavements in a typical warm city in California, such as Sacramento, is that the saving is less than about 2 kWh per m2 per year. This may help decision makers choose which heat island mitigation techniques are economical from an energy-saving perspective.

DOI10.1016/j.uclim.2015.05.007
LBNL Report Number

LBNL-184804

Short TitleUrban Climate