Energy Harvesting from Pool Boiling by Electromagnetic induction: Experimental Study and Numerical Simulation

In this study, a method has been proposed for energy harvesting from waste heat. In the proposed system, a magnet was floated on the liquid in the coiled container and the system was placed on the heat source. By pool boiling of the liquid and according to the Faraday's law of induction, voltage was induced in the coil by movement of the magnet inside the vessel. Excess temperature, dimensions of the container, liquid height in the container and the frame shape and diameter have been selected as effective parameters. Effect of these parameters on peak-to-peak voltage and root mean square voltage have been investigated experimentally. Obtained results showed that the maximum energy was harvested at higher values of excess temperature, liquid height, coil turn and frame diameter with spherical frame shape. Highest measured parameters were 532 mV and 95.65 mV for Vpp and Vrms, respectively. In the second part of this study, the numerical method is used to simulate and analyze the proposed system. Effect of various parameters on interface characteristics has been investigated. The results showed that the trend of changes in the interface parameters, including its pressure and height, were consistent with experimental data. Therefore, this method can be used to design and predict the performance of the energy harvester.