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Integrated Renewable Energy System - Perspectives and Issues
http://wgbis.ces.iisc.ernet.in/energy/
Pramod S. Dabrase and Ramchandra T.V. *
Centre for Ecological Sciences, Indian Institute of Science, Bangalore –560012

Renewable Sources of Energy: Prospects and Issues

Energy Demand

Sourcewise energy demand shows that the bio resources constitute a major energy source (84% - Dimestic, household industries and small scale industries), followed by electricity (irrigation in Agriculture), Kerosene (lighting etc.)

Box 7: Firewood as energy source

In Anthragange region of Kolar the per capita firewood need is as high as 2.5 kg. While, in other areas of the district the firewood consumption is about 1.7 kg. per person per day. Procurement of firewood is the issue of concern, because it directly affects green cover on the earth. Forests and the land own by farmer are the main source for firewood in Kolar. Fuelwood is mainly used for cooking and horticulture residues from the coconut trees are used for water heating purposes. Many households rely on more than one source and the belief that firewood is free resource is no more true for many in the area because about 12% of the households purchase firewood from market. Commercialisation of firewood is an indicator of difficult access in the area, though there are some social reasons for this. Firewood from own land is a step towards sustainability, but unfortunately farmers are reluctant to grow only Eucalyptus species for this purpose. The main reason for is forest departments' ignorance to monoculture in the area. If mixed plantation practice is adopted instead of monoculture, it will help maintain ecological balance to certain extent in the area. More and more available wasteland, village land can be brought under such "energy plantation" to support energy system in the district.


Table 5:
 Energy Source  Qty/yr  Units  Qty-mkWh  % share
Fuelwood. Bio residues etc. 176277 ton 901.273 83.995
Electricity      128 mU 128.120 11.940
Kerosene   3696 kL   32.118   2.993
Diesel, Petrol etc.   1200 kL   11.502   1.072
mU: million units (million kWh), kL: kilo litres

Status of Bio Resource availability and demand for Kolar:

The ratio of productivity and fuelwood demand is computed to get an idea of level of bioresource availability in Kolar taluk. Total bioresource available from various resources is about 3058 lakh kWh per year.  The availability to demand ratio ranges from 0.33 (if fuelwood demand is taken as 2.5 kg/person/day) to 0.64 (if fuelwood demand is taken as 1.3 kg/person/day). The ratio being less than one indicates that there is bio resource scarcity.
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