Demonstration of Energy Savings of Cool Roofs



> Table EX.1. Monitored summertime daily air-conditioning electricity savings from cool-roof research in single-story residential and commercial buildings in California and Florida.


location building type 1000ft2 roof system description daily a/c savings

insulation

duct location

change in albedo

kwh/1000ft2

%

California

Davis

medical office(a)

31.7

R-8

cond. space

0.36

6.3

18

Gilroy

"

23.8

R-19

plenum

0.35

3.6

13

San Jose

retail store(a)

32.9

rad. bar.

plenum

0.44

0.4

2

Sacramento

school(b)(c)

1.0

R-19

ceiling

0.60

4.4

46

Sacramento

residence(b)

1.8

R-11

crawl space

0.59

1.3

63

Florida

Cocoa Beach

residence(d)

1.2

none

attic

0.53

12.7

43

Cocoa Beach

"

1.3

none

attic

0.39

10.8

26

Cocoa Beach

"

1.3

R-11

attic

0.52

7.9

25

Merritt Island

"

1.7

R-11

attic

0.44

6.8

20

West Florida

"

0.9

none

none

0.53

6.2

25

Miami

"

1.4

R-11

attic

0.30

5.9

15

Cape Canaveral

"

1.4

R-11

attic

n/a

5.4

22

Cocoa Beach

"

1.5

R-19

attic

0.42

2.9

13

Merritt Island

"

1.8

R-25

attic

0.51

2.2

11

Palm Bay

"

1.5

R-19

attic

0.44

2.1

10

Palm Bay

"

1.8

R-19

attic

0.42

0.5

2

Cocoa Beach

strip mall(e)

12.5

R-11

plenum

0.46

0.7

25

 

  1. This report.

  2. Akbari, H., et al. 1997. Peak Power and Cooling Energy Savings of High-Albedo Roofs. Energy and Buildings. vol. 25, no. 2, pp. 117-126.

  3. Two identical school bungalows.

  4. Parker, D., et al. 1998. Measured and Simulated Performance of Reflective Roofing Systems in Residential Buildings. ASHRAE Transactions, vol. 104, pt. 1.

  5. Parker, D., et al. 1997. Demonstration of Cooling Savings of Light Colored Roof Surfacing in Florida Commercial Buildings: Retail Strip Mall. Florida Solar Energy Center Report FSEC-CR-964-97.
[continue] Continue to Figure 1.

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