HomeMy WebLinkAboutAgenda Report - October 17, 2001 E-14CITY OF LODI COUNCIL, COMMUNICATION
AGENDA TITLE: Adopt resolution authorizing the City Manager to provide funding in the amount of $50,000 to
fund the Public Benefits Program Grant — Vineyard Shopping Center Demand-side
Management Project (EUD)
MEETING DATE: October 17, 2001
PREPARED BY: Electric Utility Director
RECOMMENDED ACTION: That the City Council adopt a resolution authorizing the City Manager to
provide funding in the amount of $50,000 to fund the Public Benefits Program
Grant —Vineyard Shopping Center Demand -side Management Project.
BACKGROUND INFORMATION: Owners and operators of the Vineyard Shopping Center have embarked
upon a significant energy conservation effort. In the ensuing weeks, they will
have installed by Royal Roofing Company, a highly reflective product known
as white roof guard. Unlike the silver coat or light gray reflective roofing materials commonly used over the past ten
years, the white roof guard product is now rated as the top reflective product on the market. The Sacramento Tree
Foundation, in conjunction with the California Energy Commission, has approved this material for installation on
commercial building rooftops throughout the state.
A total of 125,000 square feet will be coated with white roof guard at the Vineyard Shopping Center, reducing the
roofs surface temperature by an average of 45 degrees on a typical Lodi summer day. This heat reduction on the
roof then translates into a significantly cooler store or room below the coated roof surface. In most cases, occupants
of a building where the white roof guard has been applied, reduce cooling costs (air conditioning) by an average of
fifty percent.
The Public Benefits Program grant in the amount of $50,000 reflects the maximum amount of funding available to any
one commercial customer under the Energy Services Partnership Program. The total cost for this white roof guard
project is $258,837. The grant will be paid in two equal installments over the next twelve months. The City of Lodi
Electric Utility respectfully recommends approval of this grant as a qualifying component of the City of Lodi Public
Benefits Program.
FUNDING: 164605 — Public Benefits Program (Category: Demand-side Management)
Funding Approval:L---
Vicky McAthie, Fi ance Director
Alan N. Vallow
Electric Utility Director
PREPARED BY: Rob Lechner, Manager of Customer Programs
ANV/RUIst
APPROVED:
,-'thDixo+� fijmn -City Manager
Guai d
11 CO "THE ULTIMATE ROOFING SYSTEW
SINCE IQ41
DEMONSTRATED ENERGY SAIVZNGS OF COOL ROOF SYSTEMS
A Technical Seminar presented at Roof Consultants Institute, March 1997 by,
Dr. Lisa M. Gartland
Budding Energy Analysis Program
Energy and Environment Division
Lawrence Berkeley National Laboratory
A relatively new class of roof coatings has been shown to save significant amounts of cooling energy. Cool roof
coatings reflect away the bulk of the sun's energy, allowing the roof surface to stay cooler and transferring less heat
to the building underneath. Demonstration projects have shown these coatings can save between 20% and 70%
of the cooling energy used in a building.
These coatings also have the potential to save money, reduce air pollution and reduce the need for reroofing.
There are still technical and industrial challenges in the way of the widespread adoption of these coatings as the
roofing standard. This paper discusses all aspects of cool roof coatings and their implementation, from the tech-
nical to the sociological.
DEMONSTRATION OF COOL ROOF SAVINGS:
Numerous projects have been undertaken to studv the effects of cool roof coatings on roof surface temperature
and cooling energy use. All studies confirm the ability of cool coatings to reduce roof surface tempera-
tures dramatically - by 500 to 80°F, and to save significant amounts of cooling energy during the sum-
mer months.
Table 2 summarizes the results of five studies performed in California and Florida. the albedos of all roof tops were raised
by 40 to 60 percentage points, well into the range of "very high albedo" (over 50%). Regardless of the level of insulation
in the roof, all buildings showed significant reductions in the amount of cooling energy used - reductions from 25% to
67%.
I Akhan. Bretz lianfork. burn. Fishman. Taha and Bus. 'monitoring Peak Power and Cowling Energy Savings of Shade Trees and white Surrace5 in the Sacramento
Municipal Utility District (SNILD) Service Area: DataAnalvsis, Simulations and Results'. Lawrence Berkeley Laboratory Report #LBL-34411, December 1993.
NOTE: All Roof Guard Roofing Systems and elastomeric coatings are classified as `very high albedo"
Cool Roof Systems with an albedo of greater than 80.
Tresco Paint Company - 21595 Curtis Street - Hayward, CA 94546 (800) 395-5109
Guard
"THE ULTIMATE ROOFING SYST-711"
SNCE 1941
DEMONSTRATED REFLECTIVITY INCREASE & ENERGY SAVINGS
Results of Pnst Demonstrotion Projecis
X11111 ? Pfor7nallre. 111100F GUARD Slnstomerir ThIle Contin -t,
0rer A Light Grey Capsheel Roof
Infrared Photo Of The Roof At The Edge Of A White Coating
coated
dark seams
In the roof
edge
Kuncoated
" _
40'1` 100117 -1607 1901F
SURFACE TEMPERATURE REDUCED
FROM 160OF TO 100°F
Tresco Paint Company • 21595 Curtis Street • Hayward, CA 94645 (800) 395-5109
0.18
0.77
67%
Sacramento,
one-story
R-11
CA
residence
flat roof
Sacramento,
one-story
R-19
0.08
0.68
40%
CA
school
flat roof
Cocoa Beach
one-story
R-11
0.21
0.70
25%
FL
residence
221 slope
Cocoa Beach,
one-story
uninsulated
0.20
0.73
43%
FL
residence
flat roof
Cocoa Beach,
one-story
R-19
0.23
0.67
35%
FL
School
flat roof
X11111 ? Pfor7nallre. 111100F GUARD Slnstomerir ThIle Contin -t,
0rer A Light Grey Capsheel Roof
Infrared Photo Of The Roof At The Edge Of A White Coating
coated
dark seams
In the roof
edge
Kuncoated
" _
40'1` 100117 -1607 1901F
SURFACE TEMPERATURE REDUCED
FROM 160OF TO 100°F
Tresco Paint Company • 21595 Curtis Street • Hayward, CA 94645 (800) 395-5109
1-
Guard
DUSIC0 -THE ULTIMATE ROOFING SYSTEW
SINCE 1941
DIFFERENT COLORS AND THEIR
EFFECTS ON ROOF SURFACE TEMPERATURES
Tests were conducted to determine the effect of colors on the temperature of a roof system or roofing mate-
rial. Coatings were applied over 2" of polyurethane foam. Small thermocoupler sensors were embedded
in or under the coating material. The following graph shows the difference between colored coatings and
other roofing materials when exposed to sunlight.
C O TDITI0 13:
Central Texas
August - Clear Sky
Ambient Temperature 901
200'
W
QH
W loo'
CL
2
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a 16W
ae
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a
0
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W
E 1217
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0
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LL
r
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W
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y
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a
w
N 100°
K
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The above number were measured in central Texas with an ambient temperature of 90T. Higher altitudes
or ambient temperatures above 90"F will result in even hotter surface temperatures than those measured
in this test.
From the above graph it can be seen that even light colored coatings raise the temperature somewhat.
Shiny aluminum foil reflects sunlight very well although not as well as Roof Guard. unfortunately, alu-
minum filled coatings, by contrast, are good absorbers of solar energy, thus generating more heat.
Aluminum coatings and galvanized steel both exceeded 170T in these tests.
Tresco faint Company • 21595 Curtis Street • Hayward, CA 94545 (800) 395-5109
RESOLUTION NO. 2001-240
A RESOLUTION OF THE LODI CITY COUNCIL AUTHORIZING
THE CITY MANAGER TO PROVIDE A PUBLIC BENEFITS
PROGRAM GRANT — DEMAND-SIDE MANAGEMENT
PROJECT TO VINEYARD SHOPPING CENTER
WHEREAS, the State has mandated that beginning January 1, 1998, the City of
Lodi is obligated to fund various programs through a Public Benefits Charge (PBC)
based on a historical electric revenue requirement; and
WHEREAS, the requirement amounts to approximately $1 Million per year that
must be dedicated to qualifying programs such as energy efficiency. A further stipulation
is that these efforts must be done on the customer's side of the meter in order to qualify;
and
WHEREAS, the Electric Utility Department recommends that the City provide a
Public Benefits grant in the amount of $50,000.00 to fund the installation of a highly
reflective product known as white roof guard by Royal Roofing Company. Unlike the
silver coat or light gray reflective roofing materials commonly used over the past ten
years, the white roof guard product is now rated as the top reflective product on the
market. The Sacramento Tree Foundation, in conjunction with the California Energy
Commission, has approved this material for installation on commercial building rooftops
throughout the state; and
WHEREAS, a total of 125,000 square feet will be coated with white roof guard at
the Vineyard Shopping Center, reducing the roof's surface temperature by an average of
45 degrees on a typical Lodi summer day. This heat reduction on the roof then
translates into a significantly cooler store or room below the coated roof surface. In most
cases, occupants of a building where the white roof guard has been applied, reduce
cooling costs (air conditioning) by an average of fifty percent; and
WHEREAS, the Public Benefits Program grant in the amount of $50,000 reflects
the maximum amount of funding available to any one commercial customer under the
Energy Services Partnership Program. The total cost for this white roof guard project is
$258,837. The grant will be paid in two equal installments over the next twelve months.
The City of Lodi Electric Utility respectfully recommends approval of this grant as a
qualifying component of the City of Lodi Public Benefits Program.
NOW, THEREFORE, BE IT RESOLVED, that the Lodi City Council hereby
authorizes the City Manager to provide a Public Benefits Program Grant in the amount of
$50,000.00 to Vineyard Shopping Center to fund a demand-side management project as
set out above.
Dated: October 17, 2001
I hereby certify that Resolution No. 2001-240 was passed and adopted by the
Lodi City Council in a regular meeting held October 17, 2001 by the following vote:
AYES: COUNCIL MEMBERS — Hitchcock, Howard, Land, Pennino and
Mayor Nakanishi
NOES: COUNCIL MEMBERS — None
ABSENT: COUNCIL MEMBERS — None
ABSTAIN: COUNCIL MEMBERS — None
SUSAN J. BLA
CKSTON
City Clerk
2001-240