A Hybrid Thermal Energy Storage Device, Part 1: Design Methodology

Abstract

A Hybrid Thermal Energy Storage Device, Part 1: Design MethodologyA thermal response model for designing a hybrid thermal energy storage (TES) heat sink is developed. The stabilization time and maximum operating (hot side) temperature-totransition temperature difference are used to characterize the performance of the heat sink. The thermal properties of the PCM employed in the design are investigated. Integration of a design optimization algorithm into a thermal performance model of the TES-hybrid heat sink results in determination of a best design subject to geometric and heat loading constraints. A prototype based on this best design is build and used to benchmark the performance model. The performance measured is consistent with the simulation model predictions of performance.

Heat capacity measurement of organic thermal energy storage materials

“…For use in practical applications, such as, development of heat sink materials for electronic devices [8] accurate knowledge of heat capacities for both pure as well as binary mixtures is highly desirable. Also, from a thermodynamic modeling perspective, the knowledge of heat capacity of pure compounds allows us to determine accurate Gibbs free energy expressions [5] and aids in the development of a consistent thermodynamic database of phase diagrams.…”

A parametric study of phase change material (PCM)-based heat sinks

“…Leland and Recktenwald [19] numerically optimized the geometry of a PCM heat sink used for extreme environment with neglected effect of convection in the molten PCM, edge effects on the ambient boundary, and heat spreading effects in the heat sink base. Zheng and Wirtz [20][21][22] used numerical models and experiments to optimize the performance of phase change heat sinks. The PCM they used is the polyalcohols pentaglycerine [PG] (C 5 H 12 O 3 ) with melting point of 83 • C. According to Lamberg and Siren [23], there are three stages in the melting process: pure conduction from the end-wall and the fins, conduction from the fin with some natural convection from the end-wall, and finally only natural convection from the fin.…”

Graphite Foam Infused with Pentaglycerine for Solid-State Thermal Energy Storage

“…There exists a wide range of density values reported for PG. For example [1,9], give a density range of 1.16 to 1.22 g∕cm 3 , whereas a range of 0.75 to 0.78 g∕cm 3 for powdered PG is given in [14]. Because of the range in values of reported PG density, it was decided to measure the density and subsequently use that value in this work.…”