Pablo Radici

Followers

Following

Public Views

Interests

Uploads

Papers by Pablo Radici

Experimental investigation of a thermocell with proton exchange membrane and hydrogen electrodes

International Journal of Hydrogen Energy, 2020

The limited use of low temperature waste heat turns thermocells into attractive devices for micro... more The limited use of low temperature waste heat turns thermocells into attractive devices for micropower generation. In this work, a thermocell based on a proton exchange membrane with hydrogen electrodes was experimentally investigated. The dependence of the Open Circuit Voltage on the water vapor content in hydrogen as indicated by the humidifier temperature and on the applied temperature difference between anode and cathode were studied. A maximum OCV is reported at a humidifier temperature of 300 K , whereas the maximum power density of 45.3 μ W / cm 2 was obtained at a humidification temperature of 323 K . For the same case and a temperature difference of 35 K a Seebeck coefficient of 1.75 mV / K was obtained. The experimental values were then compared to a thermocell model, which has already been published, based on Non-Equilibrium Thermodynamics and classical coefficients from literature.

Impact of Multi-Causal Transport Mechanisms in an Electrolyte Supported Planar SOFC with (ZrO2)x−1(Y2O3)x Electrolyte

Entropy

The calculation of the entropy production rate within an operational high temperature solid oxide... more The calculation of the entropy production rate within an operational high temperature solid oxide fuel cell (SOFC) is necessary to design and improve heating and cooling strategies. However, due to a lack of information, most of the studies are limited to empirical relations, which are not in line with the more general approach given by non-equilibrium thermodynamics (NET). The SOFC 1D-model presented in this study is based on non-equilibrium thermodynamics and we parameterize it with experimental data and data from molecular dynamics (MD). The validation of the model shows that it can effectively describe the behavior of a SOFC at 1300 K. Moreover, we show that the highest entropy production is present in the electrolyte and the catalyst layers, and that the Peltier heat transfer is considerable for the calculation of the heat flux in the electrolyte and cannot be neglected. To our knowledge, this is the first validated model of a SOFC based on non-equilibrium thermodynamics and this study can be extended to analyze SOFCs with other solid oxide electrolytes, with perovskites electrolytes or even other electrochemical systems like solid oxide electrolysis cells (SOECs).

Download

Pablo Radici

Uploads

Papers by Pablo Radici

Log In