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Wiley Encyclopedia of Electrical and Electronics Engineering. Copyright # 1999 John Wiley & Sons, Inc. ELECTRICITY SUPPLY INDUSTRY ter surface created by the dam. The greater the flow and head, the more electricity is produced. With a capacity of more than 92,000 MW (enough electricity to meet the energy needs of 28 million households), the United States is the world’s leading hydropower producer. Hydropower supplies 49% of all renewable energy used in the United States. Biomass Energy. Biomass energy (the energy contained in plants and organic matter) is one of the most promising renewable energy technologies.
S. T. Lee and Z. A. Yamayee, Load-following and spinning-reserve penalties for intermittent generation, IEEE Trans. Power Appar. , PAS-100: 1203–1211, 1981. 2. S. M. , The effect of photovoltaic power generation on utility operation, IEEE Trans. Power Appar. , PAS-104: 524–530, 1985. 3. B. H. Chowdhury and S. Rahman, Analysis of interrelationships between photovoltaic power and battery storage for electric utility load management, IEEE Trans. , 3: 900–907, 1988. 4. Z. A. Yamayee and J. Peschon, Utility integration issues of residential photovoltaic systems, IEEE Trans.
A cogeneration plant generates two useful products, electricity and heat, having different thermodynamic values and also different economic values. Figure 12 summarizes the main factors to be taken into account in the design of cogeneration plants. Economic or energy-saving properties are often used as evaluation criteria in the fundamental design of cogeneration plants, and they are influenced by the factors shown in Fig. 12. They are categorized into (A) COGENERATION 11 Fig. 11. Useful heat versus electricity for a two-degree-of-freedom cogeneration plant.