By D. O. Hall
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Extra info for Biomass for Energy in the Developing Countries. Current Role, Potential, Problems, Prospects
H. Ravindranath et al (1980) "An Indian village agricultural ecosystem - a case study of Ungra village, Proc. Conf. "Energy from Biomass", Brighton, UK. Note : Figures for human and animal work are an approximation calculated using the method of Revelle in which only the energy expended in performing work is counted. This is assumed to be 33% and 40% of the energy content of the food eaten by humans and draught animals, respectively. If the entire food energy content was included, figures would be substantially higher.
Urbanisation The trend of and the tendency to locate industries in and around the major cities, has led to the situation where in many countries the majority of oil consumption is concentrated in just a few areas. 5 S. 3 N. 8 Bangladesh India Zambia Coal Oil 8% Source : UN (1979) World Energy Supplies 1970-78. Energy Needs in Developing Countries 27 This has major implications in the analysis of petroleum replacement options because the problems of transporting fuels - from where they are produced to where they are needed - can be considerable.
The amount of residues produced from sawmills, in the form of sawdust, shaving and offcuts depends very much on the efficiency of the operation often amounts to almost half of the timber processed. but These provide a useful fuel for the powering of the mill and are frequently used for this purpose. uses. Any that is left over can be employed for other In the long run, however, improved technologies thinner blades such as will tend to reduce waste production as will increased utilisation of residues for the manufacture of composite materials.