ABSTRACT
The purpose of this paper is to describe a number of recently installed cogeneration systems and wood/biomass fueled power systems.
As it is well known, the term cogeneration refers to the concurrent generation of motive power or electricity and process heat or steam. Cogeneration saves fuel because either waste energy from a heating process is used for the generation of motive power, or waste energy from a power plant is used for heating applications. Typical fuel savings are illustrated schematically in Figures 1 and 2. For example, the top of Figure 1 shows the fuel consumption-2. 25 barrels of oil (14.2 MJ)— of a high temperature heating process requiring 5.4 million British thermal units of net process heat (5.7 MJ), and the fuel consumption-1 barrel of oil (6.3 MJ) —of a power plant generating 600 kilowatt-hours of electricity. The bottom of the figure shows that the same energy services can be provided by using only 2.25 barrels of oil (14.2 MJ) to fire the high temperature process, and then capturing the waste energy from this process to supply the power plant. Thus, an energy saving of 31 percent is achieved.
