Investigating the effects of different wall boundary condition on methane / air catalytic stabilized reaction on platinum surface to produce uniform thermoelectric power.

Abstract

In this work, the effect of catalytic surface reaction and different wall boundary conditions for the non-combustion flow of endocrine-methane air mixture with thermoelectric is investigated. To solve this problem, a stable and two-dimensional numerical model with the assumption of incompressible flow with thermal conductivity and constant viscosity for methane-air mixture has been used. To validate this model, the dimensionless temperature changes in terms of dimensionless dimension of the microcontroller are compared with the data that show an acceptable agreement with a maximum error of 8.45%. Increasing the transfer heat transfer coefficient from 2 to 10 watts per Kelvin reduces the mass consumption of methane, but by increasing this coefficient to 20 watts per Kelvin decreases. To validate this model, the dimensionless temperature changes in terms of dimensionless dimension of the microcontroller are compared with the data that show an acceptable agreement with a maximum error of 8.45%. Increasing the transfer heat transfer coefficient from 2 to 10 watts per Kelvin reduces the mass consumption of methane, but by increasing this coefficient to 20 watts per Kelvin decreases. In the wall mode, with a heat transfer coefficient of 10, the thermoelectric output voltage increases by 37% by doubling the velocity from 0.4 to 0.8 m / s. Due to the fact that with increasing the inlet velocity of the methane-air mixture, the efficiency in thermoelectric bases decreases, the thermoelectric power also decreases that the thermoelectric output power changes from the maximum to the minimum inlet velocity equal to 70%.

Keywords

• catalytic surface reaction
• numerical solution
• methane-air mixture
• exhaust voltage
• thermoelectric power