tailieunhanh - Analyse the electrical characteristics of an MagnetoHydroDynamic generator for maximizing the thermal efficiency

In this study, a Faraday type MagnetoHydroDynamic (MHD) generator is studied to consider the effect of electrical characteristics to the thermal efficiency. The generator performance is specified by optimizing the cycle efficiency with respect to the load parameter and by optimizing output power density with respect to seed fraction and operating pressure. | TAÏP CHÍ PHAÙT TRIEÅN KH&CN, TAÄP 17, SOÁ K1- 2014 Analyse the electrical characteristics of an MagnetoHydroDynamic generator for maximizing the thermal efficiency • Le Chi Kien Ho Chi Minh City University of Technology and Education (Manuscript Received on February 10th, 2014; Manuscript Revised August 13th, 2014) ABSTRACT: In this study, a Faraday type maximizes the thermodynamic MagnetoHydroDynamic (MHD) generator is efficiency, is independent of the studied to consider the effect of electrical regenerator efficiency, but dependent on characteristics to the thermal efficiency. The Mach number and the compressor generator performance is specified by efficiency. It can also be seen that there optimizing the cycle efficiency with respect to is no need for a high entrance Mach the load parameter and by optimizing output number more than 5 because the power density with respect to seed fraction increases in thermal efficiency are and operating pressure. As the calculation insignificant. results, the value of load parameter, which Keywords: MHD generator, thermal efficiency, electrical characteristic, load parameter, output power density. electron temperature. Each of these studies 1. INTRODUCTION considers a particular noble gas and seed for Techniques of Magnetohydrodynamic which high conductivity was attained. In these (MHD) power generation are being studied with studies, however, no attempt has been made to increasing interest for the development of high consider the effect of electrical characteristics temperature materials and high field strength such as load parameter, electrical conductivity magnets progresses. Devices using these of MHD generator for a specified generator techniques are to take the place of the turbo operating under conditions appropriate for generator in a conventional power generation maximizing the thermal efficiency. cycle. Several studies have been proposed that combine Rankine, Brayton, or hybrid cycles In this study a constant .