Bagasse based co-generation in Tamil Nadu :
Co-generation : It is the process in which more than one form of energy (such as steam and electricity) is produced in a sequential manner by use of biowaste of a renewable nature, including bagasse and rice husk.
The potential of bagasse based co-generation plant was estimated at 800 MW in Tamil Nadu. The potential
for exportable surplus power from sugar factories through bagasse based co-generation projects in India was estimated
at 5000 MW in March 2005 ,by Ministry of New and Renewable Energy(MNRE) based on increased number of
sugar factories (446 to 573),adoption of high pressure and temperature configuration i.e.,above 67 kg/sq.cm and 495
deg C,as well as taking into account of energy conservation and energy efficiency in sugar manufacturing process.
Principle of Co-generation:
In certain industries for the operation and production, steam is used and the
same is normally let out after usage. This method results in lower efficiency
and wastage of heat. If the product i.e., steam, is used for power generation,
it improves the efficiency of the system and also becomes a source of
power generation. This principle of power generation is used in
co-generation power plants.
Sugar mill Co-generation plants use the bagasse generated by
crushing the sugar cane, as f uel, to produce power and supply to the grid
during crushing season. The crushing season of the sugar mills normally
starts from 1st December and ends by 30th June of the succeeding year.
This means that power is supplied when demand is there and hence
bagasse based co-generated power could be treated on par with the ‘firm’
The non-crushing season is from July to November during which any
type of fossil fuel like Coal, Lignite etc., may be used in the Boiler
Based on the guidelines issued by the Ministry of New and
Renewable Energy(MNRE) and Government of Tamil Nadu (GoTN),
TNEB is encouraging Co-generation of power in sugar mills which mainly uses bagasse in the boiler for generation
of steam & power.
Sugar mill Scenario in Tamil Nadu
o Tamil Nadu is one of the major sugar producing state and contributes 10% of the total production
o Tamil Nadu occupies 3rd place in the Sugar Production.
o 43 mills are functioning in Tamil Nadu in Co-operative, Public and Private Sectors
o There are 29 Co-generation plants with a total installed capacity of 659.4 MW.These plants have supplied 11216.51 M.U. to TANGEDCO grid as on 30.09.2011 apart from meeting their captive requirements.
Establishment of Co-generation plants along with modernization of Co-operative & Public Sector Sugar Mills.
As per G.O.No.24, dt:26.02.2008, establishment of Co-generation plants along with Sugar mill modernization in 10 Nos. Co-operative and 2 Nos. Public sector sugar mills in Tamil Nadu is under execution on Engineering, Procurement & Construction basis, for a total capacity of 183 MW.
In all 12 projects, civil and erection works are under progress.
For old plants the power purchase tariff is Rs.3.15/- per unit.
The power purchase tariff ranges from Rs.3.836 per unit to Rs.4.491 for plants commissioned after 15.05.2006.
The capital cost required for establishing a bagasse based cogeneration projects is in the order of Rs.3.5 crores/MW .
For establising a new Bagasse click here for Registration and applications details.