<p>Thermal Energy storage is studied experimentally using phase change material (PCM) at low temperature media as lab scale units. A PCM is a substance capable of absorbing or releasing sufficient energy to undergo a phase transition. For later specified purposes, the relevant states of matter are liquid and solid; hence the use of a paraffin wax is ideal for this experiment where the phase transition from solid to liquid occurs in a relatively low temperature compared to sodium chloride. Sensible and latent heat is a basic fundamental to store energy. However, latent heat energy has more promising than sensible regard to energy density and volume of materials that are capable of handling the same amount of energy. The thermal energy storage has been constructed and&nbsp; set up based on a part of a gasket plate heat exchanger unit(GPHE) that has two corrugated plates to create one channel flow. The test is done for one channel with parallel inlet &amp; outlet flow. Water is considered as heat transfer fluid HTF and Paraffin-wax occupies the back side of the unit which is considered as movable frame in regular GPHE, however, the movable frame is clear plexiglass for tracking the process and also front frame as well. The thermocouples are located in the PCM to collect the temperature data to estimate the energy and calculate the power kWh and also for tracking the interface melting/solidification line using a clear plexiglass frame and then understanding the phenomena of the charging and the discharging process. Inlet &amp; outlet pressure gages are installed to monitor pressure drop and to find the relation between Reynolds and friction coefficients. Flowmeter is used to measure flow rate and using a T-valve to change flow rate. Hot water is carrying energy to transfer through the corrugated plate to the PCM. Corrugated plate has more contact surface area than flat plate, also, the corrugated will enhance the flow to generate more turbulent flow inside the channel to increase film heat transfer coefficients.&nbsp; Using advantages of latent heat fusion in PCM to absorb heat which is called the charging process, and retrieving the energy as recovering the energy. Paraffin wax was constrained during melting inside a transparent plexiglass frame through the use of thermocouples installed inside the PCM. The melting phase front and melting fraction of the PCM are captured in terms of melting/solidification time. Amount of recovery power is calculated based on charging time and water and wax properties are assumed as constant properties. This paper will help researchers and engineers to understand melting/solidification of PCM using corrugated (Channels) plates heat exchangers.</p>

Concurrent Passive Broadband Vibration Suppression and Energy Harvesting Using a Dual-Purpose Magnetoelastic Metamaterial Structure: Experimental Validation and Modeling_x000B_

Paper Proceedings: https://asmedigitalcollection.asme.org/IMECE/IMECE2021/volume/85543

ASME 2021 International Mechanical Engineering Congress and Exposition (IMECE2021)

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