Development and Application of the Twin Screw Expander

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Development and Application of the Twin Screw Expander ( development-and-application-twin-screw-expander )

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Energies 2020, 13, 6586 Figure 12. The screw generator set in Yangyi Tibet, China. (2) Application in biomass power generation 18 of 26 (2) Application in biomass power generation As shown in Figure 13, the Buluan biomass power plant in the Philippines adopted two schemes As shown in Figure 13, the Buluan biomass power plant in the Philippines adopted two schemes to generate electricity by using the screw expander [65]. The first scheme: Take the temperature of to generate electricity by using the screw expander [65]. The first scheme: Take the temperature of 226 °C, flow of 30 t/h of saturated steam as the heat source, through the tertiary ORC screw expander 226 ◦C, flow of 30 t/h of saturated steam as the heat source, through the tertiary ORC screw expander power generation. In this scheme, the total installed power of the unit is 3.51 MW, and the net power power generation. In this scheme, the total installed power of the unit is 3.51 MW, and the net power generation is 2.5 MW. The second scheme: With the temperature of 115 °C, the flow rate of 4.3 t/h of generation is 2.5 MW. The second scheme: With the temperature of 115 ◦C, the flow rate of 4.3 t/h of saturated steam as the heat source, configure an ORC screw generator set to generate electricity. In saturated steam as the heat source, configure an ORC screw generator set to generate electricity. In this this scheme, the total installed power of unit is 400 KW; net power generation is 350 W. Above is the scheme, the total installed power of unit is 400 KW; net power generation is 350 W. Above is the first first phase of the Philippines Buluan biomass power plant, and the second phase is under phase of the Philippines Buluan biomass power plant, and the second phase is under construction. construction. Figure 13. The screw generator set of Buluan biomass power plant in the Philippines. Figure 13. The screw generator set of Buluan biomass power plant in the Philippines. 3.2. Potential Utilization Field of Screw Expander 3.2. Potential Utilization Field of Screw Expander 3.2.1. The Field of Solar Power Generation 3.2.1. The Field of Solar Power Generation Solar energy is a kind of eternal energy and also a kind of pollution-free and environment-friendly Solar energy is a kind of eternal energy and also a kind of pollution-free and environment- energy. The earth gets about 6 × 1017 kW per year from the sun, but it is rarely used efficiently by friendly energy. The earth gets about 6 × 1017 kW per year from the sun, but it is rarely used efficiently humans, so solar energy has a huge amount of reserves and high potential for exploitation. Table 4 by humans, so solar energy has a huge amount of reserves and high potential for exploitation. Table shows the utilization and development forecast of solar energy in the world [68]. 4 shows the utilization and development forecast of solar energy in the world [68]. Figure 14 is the principle of low temperature and thermal power generation system based on the Table 4. Solar energy utilization and development forecast in major regions of the world. (unit: oil solareqeunievragleyn[t6190]6.).The operating principle can have a simple description: solar energy is collected through solar collectors and be used as the heat source of ORC system. In the evaporation, heat Year 1990 2000 2010 2020 exchange between solar energy and organic refrigerants to form high-pressure steam, which drives Region the expander to do work. The power of the turbine expander is too high and is not suitable for the North America 3 6 24 85 small-andmedium-capacLitaytisnoAlamreproicwaersystem.T1hepowe2rrange8ofthesc3r3ewexpanderis1kW– Western Europe 1 2 8 33 200 kW, which is very suitable for the small and medium ORC power generation system [70–72]. It Russia and Eastern Europe 1 2 9 26 has contributed to the miniaturization and decentralization of solar power generation. Middle East/North Africa Sub-Saharan Africa Pacific Ocean/China Central Asia/South Asia Total 2 3 1 2 1 1 1 3 2 3 9 29 6 18 6 23 17 77 14 64 Figure 14 is the principle of low temperature and thermal power generation system based on the solar energy [69]. The operating principle can have a simple description: solar energy is collected through solar collectors and be used as the heat source of ORC system. In the evaporation, heat exchange between solar energy and organic refrigerants to form high-pressure steam, which drives the expander to do work. The power of the turbine expander is too high and is not suitable for the small- and medium-capacity solar power system. The power range of the screw expander is

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