A method for improving heat exchange efficiency of solid oxide fuel cells

Abstract

The invention relates to the field of heat exchanger equipment, in particular to a method for improving the heat exchange efficiency of a solid oxide fuel cell. According to the method, the interior of a fixed structure of an adopted high temperature gas heat exchanger is internally provided with a first flue gas heat exchange structure and a second flue gas heat exchange structure which are usedfor heat exchange; a gas preheating passage for preheating gas is formed between the first flue gas heat exchange structure and the second flue gas heat exchange structure, and the second flue gas heat exchange structure is internally provided with an air preheating passage for preheating air; a vacuum chamber for heat preservation and thermal insulation and a sealing structure are arranged between the first flue gas heat exchange structure and the fixed structure. Through the use of the first flue gas heat exchange structure and the second flue gas heat exchange structure, the efficiency of preheating the gas in the gas preheating passage and the air in the air preheating passage is improved, the heat exchange efficiency of flue gas is greatly improved, and the heat energy utilization efficiency of the flue gas is improved.

Description

technical field [0001] The invention relates to the field of heat exchanger equipment, in particular to a method for improving the heat exchange efficiency of a solid oxide fuel cell. Background technique [0002] Solid oxide fuel cell (Solid Oxide Fuel Cell, referred to as SOFC) belongs to the third-generation fuel cell, which is an all-solid-state chemical power generation device that directly converts the chemical energy stored in fuel and oxidant into electrical energy in an efficient and environmentally friendly manner at medium and high temperatures. , is generally considered to be a fuel cell that will be widely used in the future like the proton exchange membrane fuel cell (PEMFC). [0003] However, the traditional solid oxide fuel cell high-temperature gas heat exchanger has low heat exchange efficiency during the heat exchange process, and there are still deficiencies in the thermal insulation of flue gas utilization, and it is inconvenient to weld with the pipe co...

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Problems solved by technology

[0003] However, the traditional solid oxide fuel cell high-temperature gas heat exchanger has low heat exchange efficiency during the heat exchange process, and there are still deficiencies in the use of flue gas heat preservation and heat insulation, and it is inconvenient to weld with the pipe connection

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