In conventional power generation, the present challenges are to raise efficiency levels at power plants. In these cases, nickel alloys and special alloys often play a decisive role. Added to this is a whole range of peripheral applications in which nickel assist in putting environmentally-friendly technologies into operation – in fuel cells, transportation and distribution grids.
Efficiency enhancements in coal-fired super critical power plants are achieved by raising the steam temperatures in boilers and turbines from 600°C(with pressure at 250 bars) to about 700 °C (350 bars). However, the existing materials used in super critical power plant construction are unable to withstand this temperature over time. INCONEL 617 is characterized by high strength and ductility with good welding properties & used in super critical power plant.
The solid oxide fuel cell(SOFC) generates clean energy in the form of heat and electricity with high levels of efficiency and thus represents an innovative source of energy for the future. In this form of fuel cell technology, the hydrogen-rich gas that is needed is produced from fuels such as diesel, petrol or methanol at temperatures up to 900°C. Inside the fuel cell, the material must have high electrical conductivity, corrosion resistance, mechanical stability and resilience as well as ductility, while it must also have no negative effects on the cell. A further advantage is its expansion values in response to heat. These values match very closely to those of the ceramic used in cells. In this way, no mechanical tension occurs between the two materials that could cause damage to the ceramic.
Boilers, Super Heaters & Other Heat Exchengers
The target operating temperature of supercritical power plants is increasing and is planned to reach 700°C. Austenitic superalloys are promising materials for these applications to replace ferritic heat resistant steels, because of their high strength at 650–700°C. In general, austenitic nickel base superalloys show higher creep rupture strength than ferritic heat resistant steels. However, they have higher coefficients of thermal expansion, lower creep rupture ductilities.
Superalloys are commonly used in gas turbine engines in those areas of the engine that are subject to high temperatures and which require high strength, excellent creep resistance, as well as corrosion and oxidation resistance. In turbine engines this is in the high pressure turbine where blades can face temperatures approaching if not beyond their melting temperature. New gas turbine engines are more efficient because of higher operating temperatures, requiring higher-performing components. The use of super alloys can allow the operating temperature to be increased from 1200⁰F to 1300⁰F. For example INCONEL 718 used in disc of gas turbine. Besides increasing efficiency and power output, higher temperatures result in reduced emissions because the combustion cycle is more complete.
Compressor of Gas Turbine
Very stringent requirements apply to their materials, due to the extreme thermal and dynamic loads that are sustained. In medium and high pressure compressor areas, high strength and resistance to high-temperature corrosion are indispensable requirements. rods and bars, discs, plates, blades and forged parts, are used in these applications. INCONEL 718 for rotating and nonrotating parts is very well. Meanwhile from titanium used in compressor parts.
Geo Thermal Energy Production
Below the earth's surface, there are boundless reserves of heat commonly referred to as geothermal energy. To be able to tap this energy, one must drill deeply into the earth's crust. The deeper one drills, the hotter conditions get – and therefore the tougher the requirements for the material in the conveyor pipes. On average, the temperature rises by about 3°C for every 100 meters of depth. due to their extremely corrosion and fatigue resistant properties, four-high sheet made from INCONEL 625 is used in the production of tubes and pipes.
Nuclear Energy Production
Safety and reliability are the cornerstones of nuclear power generation. Whether you are working in plant engineering, reprocessing of spent fuel rods or in the field of maintenance. We are materials typically used in power plant construction. Usually used in steam generator tubes from INCOLOY 800 and in reactor production from INCONEL 600, 718, X 750. We performs extensive precision testing on each single product according to individual customer specifications to ensure that they possess the required mechanical and corrosion properties, thus contributing to the safe and reliable production of nuclear energy.