Energy Efficient Shingles

a technology of energy-efficient shingles and shingles, which is applied in the direction of sustainable buildings, transportation and packaging, chemistry apparatus and processes, etc., can solve the problems of worse problems and none of the available techniques have produced energy-efficient roofing that is affordable, and achieve the effect of reducing heat islands in urban areas

Inactive Publication Date: 2015-09-17
BOARD OF SUPERVISORS OF LOUISIANA STATE UNIV & AGRI & MECHANICAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0017]The novel shingles disclosed herein were effective at reflecting su

Problems solved by technology

For buildings with dark, non-reflective surfaces the problem is worse.
From this discussion, it is no

Method used

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  • Energy Efficient Shingles
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Examples

Experimental program
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Effect test

example 1

Prototype Shingle

[0037]The filler mixture was prepared with air blown asphalt with a viscosity of 33,500 cP (centipoise) (the viscosity was measured at 135° C.). The air blown asphalt was heated to 204° C. to lower the viscosity and allow for better mixing with the recycled glass. The recycled glass (with size ranging from 53 μn to 75 μm) was heated to a 100° C. The recycled glass is added to the binder according to the measurements shown in Table 1 and mixed thoroughly. The viscosity of the mixture was measured at 204° C. and 150° C. and was found to be 20,000 cP and 33,940 cP. The mixture was placed back in the oven and heated to 230° C. For a sample of 3″×3″, 14.7 g air blown asphalt and 27.3 g recycled glass (35:65 ratio) was used for layer two.

TABLE 1ANATOMY OF SHINGLE SAMPLEBY WEIGHT PERCENT (Grams)BY WEIGHTFiberglass Matting (3″× 3″)2.0 4%Filler Mixture36.0 68%Asphalt (35%)12.6 24%Glass Cullet (65%)23.4 44%Top Surface Glass Cullet13.0 24%Backdust Glass Cullet2.20 4%Total Shin...

example 2

Solar Reflectance Index (SRI)

[0044]SRI incorporates both solar reflectance and emittance into a single value and is a measure of the constructed surface's ability to stay cool in the sun by reflecting solar radiation and emitting thermal radiation. It is defined such that a standard black surface (initial solar reflectance 0.05, initial thermal emittance 0.90) has an initial SRI of 0, and a standard white surface (initial solar reflectance 0.80, initial thermal emittance 0.90) has an initial SRI of 100. Materials with the highest SRI values are the coolest choices for roofing.

[0045]Table 2 displays the SRI of conventional asphalt shingles.

TABLE 2SOLAR REFLECTANCE INDEX OF CONVENTIONALASPHALT SHINGLESTYPE OF THE TYPE OF THE ASPHALT SHINGLESRIASPHALT SHINGLESRIWhite21Black1Gray4Weathered Wood4Green18Dark Brown4Antique Silver19Beachwood Sand19

[0046]Table 3 displays the SRI of the novel asphalt shingle.

TABLE 3SOLAR REFLECTANCE INDEX OF NOVEL ASPHALT SHINGLESMaterial CompositionIDTop Sur...

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Abstract

A novel energy efficient shingle is disclosed. The shingle is layered with the top layer comprising recycled glass cullet coated with a reflecting material such as TiO2. The novel shingle provides significant improvement in the Solar Reflectance Index (SRI).

Description

[0001]The present application claims the benefit of U.S. Provisional Patent Application No. 61 / 952,515, filed on 13 Mar. 2014, which is hereby incorporated by reference herein in its entirety including, but not limited to, those portions that specifically appear herein.[0002]This invention pertains to novel energy efficient shingles.BACKGROUND OF THE INVENTION[0003]Significant sources of urban heating are heat islands, wherein roofs of buildings absorb heat and then dissipate absorbed heat into the buildings or into the atmosphere in the vicinity of the heat islands. For buildings with dark, non-reflective surfaces the problem is worse.[0004]Heat islands may increase outdoor air temperature by about 2 to 8 degrees Fahrenheit within a specific area, or “island.”[0005]Current single roofing technologies that are used to reduce building thermal loads and reduce “heat island” effects are based on a concept called “cool roofs.” A cool roof is designed to reflect solar heat flux instead o...

Claims

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Application Information

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IPC IPC(8): E04D1/16E04D1/20
CPCE04D1/20E04D1/16B32B5/02B32B11/02B32B2262/101B32B2419/06E04D1/28Y02B80/00Y10T428/24413Y02A30/254
Inventor HASSAN, MARWA MOHAMEDKILETICO, MICAH JOEL
Owner BOARD OF SUPERVISORS OF LOUISIANA STATE UNIV & AGRI & MECHANICAL COLLEGE
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