Development of High Efficiency 5MW Class Gas Turbine the Kawasaki M5A

Abstract

Kawasaki Heavy Industries (KHI) launched the M5A gas turbine with a rated output of 4.7MW and 32.6% of thermal efficiency at ISO operating conditions. This gas turbine was designed for combined heat and power application (CHP) with dry low emission (DLE) and the features are that it is compact and light-weight. It also has high efficiency (highest in class), suitable exhaust temperature for steam production and achieved the lowest level of exhaust emissions by using proven DLE technologies originating from other recent KHI gas turbines. The design philosophy was successfully applied to be based on previous reliable gas turbine structure and materials as well as using the state-of-the-art technology about aerodynamics and the cooling. The in-house verification tests have been conducted since 2016 to confirm design targets for performance, emissions, durability and operability. This paper describes the development process of M5A and includes technical features and validation test results.

Thermo-economic analysis of a supercritical CO2-based waste heat recovery system

“…This paper investigates the sCO 2 partial heating cycle as bottoming cycle of a small-size gas turbine, whose main features are detailed in Table 1. As reported by Ishihara et al [13], the M5A gas turbine has the best simple cycle efficiency compared to competing machines of the same output class and the exhaust gas temperature is suitable for steam generation in case of application for combined heat and power. In the following, some considerations are included about (i) the sCO 2 conditions at compressor inlet, (ii) the mechanical matching between compressor and turbine, and (iii) basic fundamentals for a simple economic assessment of the sCO 2 cycle.…”

The Effects of Mainstream Reynolds Number and Blowing Ratio on Film Cooling of Gas Turbine Vanes

“…Based on the no-slip condition, a conduction heat transfer process between the first fluid layer and the surface was assumed. Hence, heat fluxes were computed from temperature gradients at the adjacent cells to the vane as shown in Equation (10).…”

“…In this way, better control of the reaction products is obtained, allowing higher turbine inlet temperatures (TIT) to be used. In this regard, it is expected that new combustor designs will make it possible to exceed 2000 K-RIT in the near future [10].…”