Download The Third meeting of the Energy Stakeholder group held on the 26

The Third meeting of the Energy Stakeholder group held on
the 26th of September, 2011 at the UDRI office
Attendees
Name
Roshni Udayvar
Preeti Bhandar
Dhun Engineer
Vinayak Manmadkar
Dr. Sharad Kale
Deepali Mody
Sangeeta Banerjee
Organization
Academy of Architecture
Academy of Architecture
Urjavaran
ILABS Energy Technologies & Suvarna Urja Wind Power Pvt Ltd
BARC
UDRI
UDRI
Apologies: Anjali Parasnis, Ira Prem, Suryanarayan Doola, Nitin Pandit, Rakesh Kumar, Mahesh Patankar,
Shubha Pandit
DRAFT LETTER CIRCULATED
1.0 Discussion on Issues
1.1
Mechanism for feeding renewable energy into grid by private generators
The reason that there is no business model developed for private players to generate small scale
renewable energy for the City grid is mainly due to the mindset and the non-availability of
frameworks for doing this. The MCGM should put in frameworks for private renewable energy
suppliers. These suppliers would need to supply to an 11KVA substation of BEST, Reliance or
TATA power where their supply would be metered and distributed to the grid. The buying rate
for electricity is 8-10 Rs / KW
Small generators of renewable power will prefer not to store their electricity but rather supply it
to the grid as it is produced. Investment in storage batteries increases the cost of the renewable
power system by about 30%. This can be saved if policy is put in place for supply to the city Grid.
1.2
Generation of renewable power by city
The city needs to look at the possibilities of generating renewable energy and include this for
implementation in the new DP. It would be necessary to identify the theoretical potential for
each type of renewable energy for each area of Mumbai. Also it would be important to map the
demand curves in terms of location and quantity in the city.
1.3
Waste to Energy conversion
Dr Kale spoke of his experience with Waste to Energy plants. In his opinion the Waste to Energy
plants had to be decentralized and used for production of Methane to be distributed within a
local network. This must be done in every neighborhood as a plant of 1 to 5 ton organic waste
capacity.
He estimated that the daily waste collection of Mumbai in actual weight (not volume) was 5000
– 6000 tones and that the figure of 11,000 quoted by the MCGM was inaccurate. If 2000 tons of
this was organic waste and each ton would produce 100 KW of electricity we were looking at
generating 200 MW a day for the city. If instead of converting this to Electricity it was retained
as methane gas and used for heating purpose we would have higher efficiency equivalent to 300
MW/day.
However this should be implemented as a decentralized solution to Solid Waste management
and not at a central location. There are electronic monitoring systems in place to monitor such
decentralized facilities. A plant of 1 ton would occupy a maximum of 30 sq m space (even 20 sq
m if implemented for a restaurant). This plant would be placed completely underground.
A 5 ton plant (of 400 m cube Solid waste capacity) could produce the equivalent of 8 LPG gas
cylinders per day. This should then be distributed locally.
To service the needs of all Mumbai he estimated that we would need 350 plants of 1-5 tones
each. Such a decentralized solution would save the MCGM on transport cost while completely
eliminating solid waste and producing organic fertilizer that can also be sold.
In order to supply the methane gas produced from such a plant to the Mahanagar gas co it
would have to reach their requirement of 95% purity and be supplied at 4 bar pressure. The
purification plant would add to the cost of the supply and is seen as unnecessary.
To implement this a complete segregation of waste at source will need to be implemented and
collected separately for transport to the local facility.
1.5
Vehicle to grid technology
The concept of vehicle to grid technology was also discussed. Energy transmission strips can be
retro fitted into existing road ways at traffic junctions to harness breaking and acceleration
energy from vehicles.
3.0 Methodologies, Agenda and date for next meeting
The UDRI will draft a recommendation letter to be circulated for comment before the next meeting.
The next meeting will be held on 3rd October 2011 (Monday ) at 11 AM at the
UDRI office
It was decided that the group would try to crystallize their strategy and principles and sign the letter to
the Municipal Commissioner by the next meeting in order that the letter can be sent out to the
Municipal Commissioner before the combined group meeting on the 13th of October. The edited draft of
the letter will be sent out to all members for their comments and corrections before the next meeting.
Roshni Udyavar agreed to present the views of the energy group at the common stakeholder workshop
that is being planned for Thursday the 13th of October. All group members are requested to block their
diary for this date. The workshop will probably be a half day session starting in the afternoon.