Abstract
With the development of society, the energy crisis has become increasingly prominent, which greatly affects the sustainable development of the economy of various countries. Industrial energy consumption accounts for more than 70% of China’s total energy consumption, of which more than 50% is converted to industrial waste heat, and recyclable waste heat resources account for about 60% of the total waste heat resources, while China’s current utilization rate of industrial waste heat only reaches about 30%. The development of renewable energy and recovery of low-grade waste heat in industry is the key to solve the problem. As a type of volumetric expander with full flow expansion, the screw expander is extensively applied in the industrial waste heat recovery and geothermal energy generation industry because of its effective utilization of low enthalpy energy. Improving the performance of the screw expander as the core, the paper concludes and summarizes the research status of the leakage, rotor geometry, sealing and lubrication, processing and manufacturing, which can affect the performance of the screw expander. In addition, it also introduces the application status and potential utilization of screw expander.
Highlights
Since the industrial revolution, fossil fuels such as oil and coal have become the foundation of social development
Industrial energy consumption accounts for more than 70% of China’s total energy consumption, of which more than 50% is converted to industrial waste heat, and recyclable waste heat resources account for about 60% of the total waste heat resources, while China’s current utilization rate of industrial waste heat only reaches about 30% [1]
In the building materials industry, waste heat resources mainly come from high-temperature flue gas, kiln crow cooling and high temperature products, etc., which accounts for about 40% of fuel consumption
Summary
Fossil fuels such as oil and coal have become the foundation of social development. The waste heat resources mainly come from rolling steel heating furnace, soaking pit, open hearth furnace and blast furnace, etc., which accounts for more than 33% of the fuel consumption. Waste heat resources mainly come from chemical reaction heat and combustible chemical heat, etc., which accounts for more than 15% of fuel consumption. In the building materials industry, waste heat resources mainly come from high-temperature flue gas, kiln crow cooling and high temperature products, etc., which accounts for about 40% of fuel consumption. If various various waste resources cancan be effectively used,used, wastewaste heat heat resources is shown in in Figure wasteheat heat resources be effectively not can it the utilization rate of resources, and effectively alleviate pressure of only it improve improve utilization rate resources,but butalso alsoeffectively effectively alleviate alleviate the the can itcan improve the the utilization rate of of resources, thepressure pressureofof the the energy crisis
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