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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.

Potential:

            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:

bagasse

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’

power.

            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

including   bagasse.

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.

Tariff

            

Old Plants:
          For old plants the power purchase tariff is Rs.3.15/- per unit.
New Plants:
          The power purchase tariff ranges from Rs.3.836 per unit to Rs.4.491 for plants commissioned after 15.05.2006.

 

 

Costs

            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.

Tamil Nadu Generation and Distribution Corporation