Material Selection for Additive Manufacturing of the Hot Section of Micro Gas Turbine

The increasing energy consumption of the domestic sector, such as residential buildings and small commercialunits, raised the interest of researchers and Original Equipment Manufacturers (OEM) to develop small andmicro Combined Heat and Power (CHP) systems. Micro Gas Turbine (MGT) is one of micro CHP units' mostdeveloped prime movers. However, because of the limitation in turbine inlet temperature and the low efficiencyof the recuperators, commercially available MGTs are suffering from poor electrical efficiency. Thecapabilities of Additive Manufacturing (AM) technologies paved the way to develop an integrated hot sectionof MGT using advanced high-temperature materials to improve the electrical efficiency and reduce the size ofthe unit. In this context, Multi Criteria Decision Making methods have been used to calculate the weight ofthe criteria for the shortlisted materials and select the appropriate material. The results show that In۹۳۹, hightemperature Nickel based superalloy, is the best material for this component.

Keywords:

Micro Gas Turbine , Additive Manufacturing , Laser Powder Bed Fusion , Combustor , HeatExchanger , Multi-Criteria Decision Making