A calibrated model has been used to estimate the energy savings by cool roof application on buildings located in five different climatic zones. The model has been calibrated as per the measured data in a building located in Hyderabad (India), and the same has been used to project energy savings in different cities located in five different climatic zones of the country. Results show that the maximum reduction in energy consumption is observed in Mumbai (warm and humid climate), followed by Ahmedabad (hot and dry climate), Bangalore (temperate climate), and Delhi (composite climate). Least energy saving is observed in Shillong (cold climate). In all the climates except cold, the financial payback period is acceptable, being less than 3 yr, whereas for cold climate, the investment is getting paid back in 6.69 yr, making the cool roof application not very attractive.

Topics
Energy use and applications, Thermal conductivity, Thermal instruments, Thermodynamic states and processes, Atmospheric radiation, Computer aided design, Optical properties, Minerals, Polymers, Descriptive statistics
1.
Y.
 
Pan
,
Z.
 
Huang
, and
G.
 
Wu
,
Energy Build.
 
39
,
651
(
2007
).
https://doi.org/10.1016/j.enbuild.2006.09.013
Google Scholar
Crossref
Search ADS
 
2.
M. J.
 
Chimack
,
Proceedings of the Seventh International IBPSA Conference
,
2001
, pp.
191
–
197
.
3.
A.
 
Pedrini
,
F. S.
 
Westphal
, and
R.
 
Lamberts
,
Build. Environ.
 
37
,
903
(
2002
).
https://doi.org/10.1016/S0360-1323(02)00051-3
Google Scholar
Crossref
Search ADS
 
4.
J.
 
Yoon
,
D. E.
 
Claridge
, and
E. J.
 
Lee
,
J. Sol. Energy Eng.
 
125
,
251
(
2003
).
https://doi.org/10.1115/1.1564076
Google Scholar
Crossref
Search ADS
 
5.
J. S.
 
Haberl
 and
T. E.
 
Bou-Saada
,
J. Sol. Energy Eng.
 
120
,
193
(
1998
).
https://doi.org/10.1115/1.2888069
Google Scholar
Crossref
Search ADS
 
6.
H.
 
Akbari
,
R.
 
Levinson
, and
L.
 
Rainer
,
Energy Build.
 
37
,
1007
(
2005
).
https://doi.org/10.1016/j.enbuild.2004.11.013
Google Scholar
Crossref
Search ADS
 
7.
S.
 
Konopacki
,
H.
 
Akbari
,
M.
 
Pomerantz
,
S.
 
Gabersek
, and
L.
 
Gartland
, “
Cooling energy saving potential of light-colored roof for residential and commercial buildings in 11 US metropolitan cities
,”
Lawrence Berkeley National Laboratory
Report No. LBNL-39433,
1997
.
Google Scholar
 
8.
S.
 
Konopacki
,
L.
 
Gartland
,
H.
 
Akbari
, and
L.
 
Rainer
, “
Demonstration of energy savings of cool roofs
,”
Lawrence Berkeley National Laboratory
Report No. LBNL-40673,
1998
.
Google Scholar
 
9.
E.
 
Hildebrandt
,
W.
 
Bos
, and
R.
 
Moore
, ASHRAE Technical Data Bulletin Vol.
14
, Issue
2
,
1998
.
10.
S.
 
Konopacki
 and
H.
 
Akbari
, “
Measured energy savings and demand reduction from a reflective roof membrane on a large retail store in Austin
,”
Lawrence Berkeley National Laboratory
Report LBNL-47149,
2001
.
Google Scholar
 
11.
D.
 
Parker
,
J.
 
Sherwin
, and
J.
 
Sonne
, ASHRAE Technical Data Bulletin Vol.
14
, Issue
2
,
1998
.
12.
A.
 
Synnefa
,
M.
 
Santamouris
, and
H.
 
Akbari
,
Energy Build.
 
39
,
1167
(
2007
).
https://doi.org/10.1016/j.enbuild.2007.01.004
Google Scholar
Crossref
Search ADS
 
13.
N. M.
 
Nahar
,
P.
 
Sharma
, and
M. M.
 
Purohit
,
Build. Environ.
 
38
,
109
(
2003
).
https://doi.org/10.1016/S0360-1323(02)00029-X
Google Scholar
Crossref
Search ADS
 
14.
N. K.
 
Bansal
 and
G.
 
Minke
,
Climatic Zones and Rural Housing in India
,
Scientific Series of International Bureau
(
Forschungszentrum Jülich GmbH, Zentralbibliothek
,
Jülich, Germany
,
1995
).
Google Scholar
 
15.
Ministry of Power, Government of India
, ECBC, Energy Conservation Building Code,
2007
.
16.
DESIGNBUILDER, web link: http://www.designbuilder.co.uk.
17.
ASHRAE Guideline 14-2002: Measurement of energy and demand savings, American Society of Heating, Refrigerating and Air-Conditioning Engineers.
18.
DOE
, Federal Energy Management Program, M&V Guidelines: Measurement and verification for federal energy projects (FEMP), version 3.0,
2008
.
19.
IPMVP
, Concept and options for determining energy and water savings: Efficiency valuation organization,
2007
.
© 2011 American Institute of Physics.
2011
American Institute of Physics
You do not currently have access to this content.