Fuel cell engine exhaust silencer

Abstract

The invention discloses a fuel cell engine exhaust silencer, comprising a first cavity and a second cavity which are each internally provided with two partitions, and three chambers divided by the partitions, wherein a first chamber is externally connected with an intake pipe, a third chamber is connected with one end of a connecting pipe, a fourth chamber is connected with the other end of the connecting pipe, a sixth chamber is externally connected with an exhaust pipe, the junctions between the chambers and the intake pipe, the exhaust pipe and the connecting pipe have sharply changed surfaces, a first partition between the first, third chambers and the second chamber is provided with a plurality of micropores, and a third partition between the fourth, sixth chambers and the fifth chamber is provided with a plurality of micropores. The complex exhaust silencer according to the invention reduces the exhaust noise from the fuel cell engine by means of the combination of resistant silencing technology with micropore silencing technology. In addition, the exhaust silencer can effectively separate water contained in the exhaust gas from the exhaust gas and recover the separated water effectually through the design of corresponding recovery channels, thereby guaranteeing water balance of the fuel cell engine.

Description

technical field [0001] The invention belongs to the field of pressurized fuel cell engine design, and in particular relates to an exhaust muffler used on the fuel cell engine. Background technique [0002] The pressurized fuel cell engine mainly uses a back pressure valve to control the operating pressure of the fuel cell engine to ensure that the fuel cell can maintain a stable operating pressure in the entire operating range, thereby enhancing the operating stability of the fuel cell engine, but the back pressure valve The small cross-sectional area of ​​the internal flow channels results in very loud high-frequency noise from the fuel cell exhaust. The maximum noise of the fuel cell engine system can reach 93dB. At the same time, during the operation of the fuel cell engine, more water will be generated through the electrochemical reaction, and the water will mix with the air that has not participated in the reaction and enter the exhaust system, which increases the diff...

AI Technical Summary

Problems solved by technology

At the same time, during the operation of the fuel cell engine, more water will be generated through the electrochemical reaction, and the water will mix with the air that has not participated in the reaction and enter the exhaust system, which increases the difficulty of noise reduction in the exhaust system of the fuel cell engine.

In order to reduce exhaust noise, a sound-absorbing muffler filled with sound-absorbing materials is mostly installed on the fuel cell exhaust system, but this type of muffler has a narrow muffler frequency range, and is easily blocked by condensed moisture. water, resulting in reduced sound deadening effect

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