Performance potential of a new molten hydroxide direct carbon fuel cell–based triple‐cycle system for clean and efficient coal use

Abstract

To efficiently and environmental-friendly use coal, a novel triplecycle system model incorporating molten hydroxide direct carbon fuel cell (MHDCFC), alkali metal thermal electric converter (AMTEC), and thermoelectric generator (TEG) is proposed to evaluate the performance potential.Considering a variety of electrochemical and thermodynamic irreversible losses, a mathematical model for the proposed system is developed, and optimum operation ranges for several important performance indicators are determined. Numerical calculations indicate that the improvements in the maximum power density and the corresponding efficiency of the triple-cycle system are, respectively, about 92% and 26% compared with the single MHDCFC, and the improvements are, respectively, 11% and 10% compared with the cogeneration system composed of MHDCFC and AMTEC. Extensive

High-Performance La0.9Sr0.1Ga0.8Mg0.2O3-δ Electrolyte-Based Direct Raw Brown Coal Fuel Cells

“…Nowadays, the world is vigorously developing clean energy technologies to tackle the energy shortages and environmental pollution as a result of traditional utilization of fossil fuels, yet the immature technology and high cost still impede their development and application. − It is universally accepted that fossil fuels still dominate the global energy markets, and coal ranks among the most plentiful and extensively used energy sources worldwide, particularly in China. − Nonetheless, there are two obvious drawbacks of conventional energy utilization pathways: one is the Carnot cycle which gives rise to a poor energy conversion efficiency, only about 35%. − Second, severe environmental pollution and global climate change will come from the direct combustion and utilization of coal in the traditional way of thermal power generation. , Hence, it is of great significance to vigorously develop a novel efficient clean coal technology to take the place of the direct coal combustion technology …”