Biomass Energy An Overview of Biofuels and Their Resources

17 BIOMASS ENERGY AN OVERVIEW OF BIOFUELS AND THEIR RESOURCES 

FIGURE 17,21 Illustration of the principle of pressure-retarded osmosis power generation that is based on the difference in osmotic pressure between saltwater and freshwater. Although it is shown here as a stepwise process, this mode of power generation operates on a continuous basis. 

FIGURE 17.22 Distribution of bioenergy sources worldwide. The predominance of wood energy, primarily for cooking and heating in less developed countries, is obvious. 

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