초록 ▼

Two-phase LMMHD energy conversion systems have potentially significant advantages over conventional systems such as higher thermal efficiency and substantial simplicity with lower capital and maintenance costs. Maintenance of low velocity slip is of importance for achieving high generator efficiency

Two-phase LMMHD energy conversion systems have potentially significant advantages over conventional systems such as higher thermal efficiency and substantial simplicity with lower capital and maintenance costs. Maintenance of low velocity slip is of importance for achieving high generator efficiency. A bubbly flow pattern ensures very low velocity slip. The full governing equations have been written out, and a computer prediction code has been developed to analyze performance of a two-phase flow LMMHD generator and nozzle under conditions of no slip. Three different shapes of an LMMHD generator have been investigated. Electrical power outputs are in the 20 kW range. Generator efficiency exceeds 71 percent at an average void fraction of about 70 percent. This is an appreciable performance for a short generator without insulating vanes for minimizing electrical losses in the end regions.

대표청구항 ▼

A generator section assembly for use in a liquid metal magnetohydrodynamic electricity generator comprising: a duct for enclosing a two-phase fluid flow, including a liquid metal and a gas, the duct having an inlet and an outlet; a pair of sidewalls that form two walls of the duct; a pair of electro

A generator section assembly for use in a liquid metal magnetohydrodynamic electricity generator comprising: a duct for enclosing a two-phase fluid flow, including a liquid metal and a gas, the duct having an inlet and an outlet; a pair of sidewalls that form two walls of the duct; a pair of electrodes that form two opposing walls of the duct and are positioned for contacting with the two-phase flow, each of the pair of electrodes having a surface region forming a wall of the duct from the inlet toward the outlet having a non-linear increase in the distance between the pair of electrodes from the inlet of the duct towards the outlet of the duct, thus providing a nonlinear expansion region within the duct as the distance between the pair of electrodes that form a wall of the duct increases non-linearly; and a magnetic field within the two-phase flow to generate electricity as the two-phase flow passes through the magnetic field within the non-linear expansion region of the duct.