India has more than 500
million square meters of commercial built up area, which is expected to reach
around 2000 million square meters by 2030 (assuming 5 to 6% growth rate),
according to the USAID ECO III project report. Chennai alone has a lot of
shopping malls, commercial complexes, Five-star hotels and theater complexes. According
to TNEB sources the total energy requirement for Chennai is 2200MW out of which
shopping areas / shopping malls like T.Nagar, Pondy bazaar etc. consume around
600MW and commercial buildings (office and software companies in the IT
corridor) consume around 500MW of power. Here is a sample list:
Shopping complex - EA, Spencer’s, Ampa skywalk, Ispahani center, Fountain plaza, Ramee
The energy (in Kilowatt-Hour) used per square meter per year in shopping centers in India varied between 103-532 kWh/Sq.m./year with an average of 252 kWh/Sq.m./year. Considering that, Chennai is currently estimated to have approximately 20,57,600 Sq.ft. of mall space, meaning that the average total power consumption of malls in Chennai is 4,81,71,617 kWh/Year.
If we just consider the 3.75 acres of rooftop area, it alone can carry a whopping 0.7 to 1 MWp of solar PV power capacity, which can generate around 12 to 16 lakh units a year and this can replace the grid electricity for around 1300 houses, with an average consumption of 100 units a month per household. But the energy generated is only a very small portion of the consumption which will be self consumed by the mall itself, but this can greatly bring down the load on TNEB grid.
- Giridaran Srinivasan
Shopping complex - EA, Spencer’s, Ampa skywalk, Ispahani center, Fountain plaza, Ramee
Theater
complex -Satyam cinemas Abirami complex, Citi center, Sangam
cinemas
Commercial
building -Olympia Tech Park, Thamarai Park, Asendas,
Hotels
-Taj,
Hilton, Hyatt, The Park, Le Royal meridian,
The energy (in Kilowatt-Hour) used per square meter per year in shopping centers in India varied between 103-532 kWh/Sq.m./year with an average of 252 kWh/Sq.m./year. Considering that, Chennai is currently estimated to have approximately 20,57,600 Sq.ft. of mall space, meaning that the average total power consumption of malls in Chennai is 4,81,71,617 kWh/Year.
Existing commercial one
shift buildings in India consume around 149 units per square meter annually,
therefore the total power consumption of a building per can be around 20lakh
units a year. Similarly the average area of a 4 or 5 start hotel is projected
to be around 19,136 Sq.mt, which consumes a enormous 48, 65, 711 units a year.
For our case study here I
have considered the biggest shopping mall in south India, which is the Express
Avenue (EA) at whites’ road in Chennai. EA is spread around 10 acres of land
with a built area of 3.75Acres, which is equal to 1, 63, 350 sq. ft. This is
400 times the size of an average middleclass (single bedroom -400 Sq.ft)
household in Chennai.
The total retail space of
the EA mall is 900,000 Sq.ft; therefore the consumption will be more than 2
crore units of electricity each year. These units of electricity are equivalent
to lighting 18,000 household with an annual consumption of 1200 units each.
Source: The Hindu (Dated: December 2009)
Source: The Hindu (Dated: December 2009)
If we just consider the 3.75 acres of rooftop area, it alone can carry a whopping 0.7 to 1 MWp of solar PV power capacity, which can generate around 12 to 16 lakh units a year and this can replace the grid electricity for around 1300 houses, with an average consumption of 100 units a month per household. But the energy generated is only a very small portion of the consumption which will be self consumed by the mall itself, but this can greatly bring down the load on TNEB grid.
3D Shadow simulation – based on
avaiable data from Google
Upcoming
malls in Chennai:
With reference to the
Asicpac report on malls in Chennai, it is very clear that the local population
is still shopping hungry and the demand still tops the supply. More than 62,
86,000 Sq.ft of malls (13 malls) are expected to be commissioned by end of 2013
at various parts of Chennai, mostly in the developing areas of the city. This
will greatly bring down the shopping hunger demand, but at what cost? Do we
have enough planning and power infrastructure for the further addition?
Conclusion:
If all the above shopping
malls, commercial building, star hotels and cinema complex are considered with
solar PV rooftop installation, it can generate enough amount of electricity for
the nearby neighborhood/houses or at least for the own building consumption and
excess can be sent to the grid using the net metering concept.
If the concept of energy
efficiency and net metering/distributed generation is adopted by the above
commercial complex / buildings, the nearby communities can greatly benefit and reduce the load on the unstable TNEB grid. And this will also significantly reduce the
power cuts in the urban/rural areas in Tamil nadu other than Chennai.
The recent Tamil Nadu solar
state policy has implemented net metering for the very first time along with
the GBI (Generation Based Incentives). As
per the policy, commercial establishments, colleges, government buildings,
residential schools, IT parks, industries, and buildings with a built-up area
of 20,000sqm come under the Solar Purchase Obligation (SPO). They can meet this
6% SPO by generating their own power, purchasing solar power from the state
electricity board or by purchasing power from private solar power producers. Recently TEDA has announced that all colleges in Tamil Nadu should have solar PV systems in their rooftops, you can find the information here - Must for all colleges by 2014
This policy can be a game
changer for the rooftop segment as the GBI details below show. GBI can easily
make the payback or return on investment faster, provided the GBI is
implemented quickly along with existing subsidy. The question, however, is can
TNEB recover from its big losses and implement SPO effectively?
Rooftop
GBI
|
(projects
commissioned before 31 Mar - 2014)
|
||||
Year 1
|
Year 2
|
Year 3
|
Year 4
|
Year 5
|
Year 6
|
Rs. 2/kWh
|
Rs. 2/kWh
|
Rs. 1/kWh
|
Rs. 1/kWh
|
Rs. 0.5/kWh
|
Rs.0.5/kWh
|
- Giridaran Srinivasan
Nice article hope these projects bring relief to tamilnadu especially for those who are living in the rural .
ReplyDelete@gyaan thanks for your feedback.
ReplyDeleteVery nice Giri. Happy Blogging!
ReplyDeleteHello varun,,
DeleteThanks for your feedback.
Good insight to the present and future energy consumption of Chennai. The proposal makes a lot of sense as well. Good going Giri.
ReplyDeletetats a great piece of info,hope ur blog wakes many more people regarding renewables
ReplyDeleteGreat article! Keep up the good work!
ReplyDeletegreat work! giri...
ReplyDeleteThis comment has been removed by the author.
ReplyDeleteAwesome post!
ReplyDeleteThanks for your sharing.
For additional information, if you need Trusted Misty Fan Rental Service in Indonesia for anything likes event, meeting, exhibition, etc.
You can always try to contact us Arthur Teknik.
If you at Indonesia, you can find more information about us here : http://id.arthurteknik.com/