Heat regenerator, miniature gas turbine and miniature gas turbine generator unit

Abstract

Disclosed are a heat regenerator, a miniature gas turbine comprising the heat regenerator and a miniature gas turbine generator unit. The heat regenerator comprises a shell and a plurality of heat exchanging plates; each heat exchanging plate comprises a first heat exchanging element, a second medium flow-guiding sheet and a second heat exchanging element, and the first heat exchanging elements and the second heat exchanging elements each comprise a first medium flow-guiding sheet I, a heat exchanging fin and a first medium flow-guiding sheet II; first medium channels are formed by the heat exchanging fins of the first heat exchanging elements and the second heat exchanging elements of the adjacent heat exchanging plates; and a second medium channel is formed by the heat exchanging fins ofthe first heat exchanging element and the second heat exchanging element of each heat exchanging plate. According to the heat regenerator, the heat exchanging efficiency is improved by increasing theheat exchanging area, and the size is decreased so that the heat regenerator can be applied modularly, and compressed gas introduced into a combustor is heated through heat of high-temperature tail gas so as to increase the combustion rate of fuel.

Description

technical field [0001] The invention relates to the technical field of heat exchange equipment, in particular to a regenerator, a micro gas turbine installed with the regenerator and a micro gas turbine generating set. Background technique [0002] Regenerator, also known as heat exchanger, is a device that exchanges heat between two fluids flowing through it. In the heat exchangers of the prior art, a plurality of heat exchange tubes are usually arranged in a shell, or heat exchange tubes in the form of coils are arranged in the shell, so as to increase the heat exchange area and improve the heat exchange efficiency. For micro gas turbines, installing a regenerator to increase the temperature of the gas turbine's charge air can greatly improve its energy conversion efficiency. The regenerator mainly uses the high-temperature exhaust gas discharged from the micro gas turbine to heat the pressurized air from the compressor, and then enters the combustion chamber for combusti...

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Problems solved by technology

[0003] However, there are multiple problems in the regenerator in the prior art, specifically as follows: (1), the heat exchange area is the surface area of ​​the heat exchange tube, and due to the limited surface area of ​​the heat exchange tube, the heat exchange area of ​​the heat exchanger is limited, As a result, it is difficult to improve the heat exchange efficiency; (2), the shape of the shell is usually a cylindrical structure, and its volume is large, resulting in a large installation space required and limited use; (3), the cylindrical structure When the heat exchanger is applied to the engine, it is usually sleeved outside the combustion chamber, which increases the volume of the engine and limits the installation position of the engine

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