Clean Bio-Mass Power Plant PDF

This paper will address the design and layout of the 600 kW Clean Bio-Mass Power Plant, under construction in North Pole, Alaska, USA. The plant uses waste paper and cardboard to generate heat in a boiler, after forming dense pellets for proper burning. The owner has a perpetual contract with the solid waste recycler to obtain up to 5,000 tons (4,536 Mg) of paper waste per year. The boiler uses a synthetic high-temperature, low pressure heat transfer fluid, boiling point = 650°F (343°C) heated to 500°F (260°C); the fluid passes through two heat exchangers, returning at 300°F (149°C). On the heat exchanger cold side, refrigerant R-245fa is heated from 130°F (54°C) up to 320°F (160°C) and the pressure is increased from 30 psi (207 kPa), up to 250 psi (1,724 kPa). This high pressure refrigerant drives five (5) 125 kW turbines which rotate at 28,000 RPM, with magnetic bearings, to generate AC power. A rectifier-inverter polishes this into utility-grade AC power, at 480V, 3-phase, 60 Hertz, which is back-fed into the power grid, as a basis for "green" recycled power. Eventually, the carbon dioxide from the combustion process will be connected to a greenhouse for absorption by plants, to form the first commercial power plant without a smokestack at the end of phased construction.