Analysis and Enhancement of Heat Transfer of the Gas Head Cover of Hydrogen Diaphragm Compressors

Excessive thermal stress on the gas head cover is the major cause of diaphragm compressor failure, which poses risks to the hydrogen refueling station and drives up operating costs, should be paid attention to. In order to create a finite element simulation model of the temperature distribution of the gas head cover of the diaphragm compressor, this paper theoretically analyzed the relevant heat transfer boundaries of the gas head cover. To verify this simulation model, a test rig was constructed. The findings showed that the calculated temperatures and measured values agreed closely, with a 9.1% variation. Further, this study investigated the impact of structures and materials on the effect of enhanced heat transfer through simulation and experimental verification. The outcomes demonstrated a better enhanced heat dissipation impact for the enhanced heat transfer structure close to the center high temperature area. The use of materials with high thermal conductivity had a significant impact on increasing heat flow within the same structure, which could lower the maximum temperature by 34.6 °C. This simulation model can be used to evaluate the heat dissipation effect of the head cover structure when designing a diaphragm compressor.