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Title: Implementation of solar-reflective surfaces: Materials and utility programs

Abstract

This report focuses on implementation issues for using solar-reflective surfaces to cool urban heat islands, with specific examples for Sacramento, California. Advantages of solar-reflective surfaces for reducing energy use are: (1) they are cost-effective if albedo is increased during routine maintenance; (2) the energy savings coincide with peak demand for power; (3) there are positive effects on environmental quality; and (4) the white materials have a long service life. Important considerations when choosing materials for mitigating heat islands are identified as albedo, emissivity, durability, cost, pollution and appearance. There is a potential for increasing urban albedo in Sacramento by an additional 18%. Of residential roofs, we estimate that asphalt shingle and modified bitumen cover the largest area, and that built-up roofing and modified bitumen cover the largest area of commercial buildings. For all of these roof types, albedo may be increased at the time of re-roofing without any additional cost. When a roof is repaired, a solar-reflective roof coating may be applied to significantly increase albedo and extend the life of the root Although a coating may be cost-effective if applied to a new roof following installation or to an older roof following repair, it is not cost-effective if themore » coating is applied only to save energy. Solar-reflective pavement may be cost-effective if the albedo change is included in the routine resurfacing schedule. Cost-effective options for producing light-colored pavement may include: (1) asphalt concrete, if white aggregate is locally available; (2) concrete overlays; and (3) newly developed white binders and aggregate. Another option may be hot-rolled asphalt, with white chippings. Utilities could promote solar-reflective surfaces through advertisement, educational programs and cost-sharing of road resurfacing.« less

Authors:
; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley Lab., CA (United States)
Sponsoring Org.:
California Inst. for Energy Efficiency, Berkeley, CA (United States)
OSTI Identifier:
10172670
Report Number(s):
LBL-32467
ON: DE93016716
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Jun 1992
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 36 MATERIALS SCIENCE; ROOFS; REFLECTIVE COATINGS; SOLAR RADIATION; REFLECTION; ALBEDO; REFLECTIVITY; ASPHALTS; CONCRETES; COLOR; EMISSIVITY; COST; FINANCIAL INCENTIVES; COST RECOVERY; ENERGY CONSERVATION; ENERGY EFFICIENCY; CALIFORNIA; URBAN AREAS; COMMERCIAL BUILDINGS; RESIDENTIAL BUILDINGS; BITUMENS; BUILDING MATERIALS; 320107; 360606; BUILDING SYSTEMS; PHYSICAL PROPERTIES

Citation Formats

Bretz, S., Akbari, H., Rosenfeld, A., and Taha, H. Implementation of solar-reflective surfaces: Materials and utility programs. United States: N. p., 1992. Web. doi:10.2172/10172670.
Bretz, S., Akbari, H., Rosenfeld, A., & Taha, H. Implementation of solar-reflective surfaces: Materials and utility programs. United States. doi:10.2172/10172670.
Bretz, S., Akbari, H., Rosenfeld, A., and Taha, H. Mon . "Implementation of solar-reflective surfaces: Materials and utility programs". United States. doi:10.2172/10172670. https://www.osti.gov/servlets/purl/10172670.
@article{osti_10172670,
title = {Implementation of solar-reflective surfaces: Materials and utility programs},
author = {Bretz, S. and Akbari, H. and Rosenfeld, A. and Taha, H.},
abstractNote = {This report focuses on implementation issues for using solar-reflective surfaces to cool urban heat islands, with specific examples for Sacramento, California. Advantages of solar-reflective surfaces for reducing energy use are: (1) they are cost-effective if albedo is increased during routine maintenance; (2) the energy savings coincide with peak demand for power; (3) there are positive effects on environmental quality; and (4) the white materials have a long service life. Important considerations when choosing materials for mitigating heat islands are identified as albedo, emissivity, durability, cost, pollution and appearance. There is a potential for increasing urban albedo in Sacramento by an additional 18%. Of residential roofs, we estimate that asphalt shingle and modified bitumen cover the largest area, and that built-up roofing and modified bitumen cover the largest area of commercial buildings. For all of these roof types, albedo may be increased at the time of re-roofing without any additional cost. When a roof is repaired, a solar-reflective roof coating may be applied to significantly increase albedo and extend the life of the root Although a coating may be cost-effective if applied to a new roof following installation or to an older roof following repair, it is not cost-effective if the coating is applied only to save energy. Solar-reflective pavement may be cost-effective if the albedo change is included in the routine resurfacing schedule. Cost-effective options for producing light-colored pavement may include: (1) asphalt concrete, if white aggregate is locally available; (2) concrete overlays; and (3) newly developed white binders and aggregate. Another option may be hot-rolled asphalt, with white chippings. Utilities could promote solar-reflective surfaces through advertisement, educational programs and cost-sharing of road resurfacing.},
doi = {10.2172/10172670},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {6}
}