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Using biomass
Published in Volker Quaschning, Understanding Renewable Energy Systems, 2016
In addition to being used as a source of heat, biomass can also be used to produce electricity. Here, the same processes are used as those mentioned before, such as the Clausius–Rankine process (see Chapter 4), for other thermal power plants. Recent policies, such as Germany’s Renewable Energy Act (EEG), have brought about a wide range of new biomass power plants recently. Figure 9.8 shows the example of the Pfaffenhofen power plant running on biomass based on a design by eta Energieberatung. The power plant went into operation in the summer of 2001. The total investment amount for the plant, the district steam network, and the district heat network was around €45 million. The biomass boiler has an efficiency of 87.2% without and 95.4% with flue gas condensation had an output of 23.5 / 26.7 MW. 10,620 kg/h of biomass is consumed. Untreated wood chips and sawmill waste with the water content up to 45% is used to fire the boiler. The system provides process steam for a nearby industrial plant and produces heat for the district heat network. A condensation turbine runs on steam from the boiler at 450 °C and 60 bar to power a generator. The generator has a maximum output of 6.1 MW. Each year, the biomass heat and power plant produces some 200,000 MWh of heat and 40,000 MWh of electricity for the local grid. More than 60,000 t of CO2 is offset in the process.
Seeking Energy Autonomy at School*
Published in Energy Engineering, 2018
Richard G. Skinner, David L. Maciejewski
The East Lycoming biomass boiler was published in detail in an article entitled “A Tale of Two Biomass Boilers.” Basically, a biomass boiler uses a clean burning solid fuel combustor along with traditional boiler technology to produce thermal energy. Biomass boilers are well established, particularly in colder climates. In fact, in Vermont, 1 child in 10 attends a biomass-heated school. Biomass boiler systems typically have large fuel storage areas and impressive fuel handling systems. Shown in Figure 3 is the McClure installed Messersmith biomass boiler at East Lycoming.