Figure 23-6 depicts the operation of an electric cogener-ation system with a full-load capacity that can meet 75% of the facility's peak electric demand. The system operates at full capacity for 10 hours per day on weekdays and tracks the facility's demand for 6 hours per day. The system is shut down overnight due to the combination of low electricity cost in the off-peak period and low thermal requirements. This strategy of dynamic operation depending upon hourly economic considerations is often referred to as economic dispatch.

Fig. 23-4 On-Site Power Production vs. Purchased Power for Electrically Baseloaded Plant.

Internal-Use Generation vs. Power Exportation

Internal-use electric generation is the simplest and most economical generation strategy. Systems designed for

Guide to Alternative Fuels

Guide to Alternative Fuels

Your Alternative Fuel Solution for Saving Money, Reducing Oil Dependency, and Helping the Planet. Ethanol is an alternative to gasoline. The use of ethanol has been demonstrated to reduce greenhouse emissions slightly as compared to gasoline. Through this ebook, you are going to learn what you will need to know why choosing an alternative fuel may benefit you and your future.

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