A Hybrid Electro-Thermal Energy Storage System for High Ramp Rate Power Applications

Abstract

The practice of hybridizing energy storage systems is vital to high ramp rate power applications, in which energy storage systems are constrained by strict power and energy requirements. Hybrid energy storage is typically studied in the electrical and thermal domains separately, but due to the inherent link between electrical and thermal energy domains, it is necessary to examine hybrid energy storage in both domains simultaneously. In this paper, a combined electro-thermal energy storage system is modeled and simulated. Equivalent circuit and lumped-parameter models are used to facilitate control design. PI controllers are designed for both the electrical and thermal domains to demonstrate the ability to perform multi-domain energy management.

Switched Moving Boundary Modeling of Phase Change Thermal Energy Storage Systems

“…• Heat transfer is assumed to be purely conductive. Natural convection in the liquid is not taken into account, similar to [7]. Future experimental work similar to [16], [17] will focus on quantifying and incorporating the effects of natural convection into the graph-based modeling framework.…”

“…The need for higher performance and more efficient thermal management systems has driven the design of systems with integrated Thermal Energy Storage (TES) devices that leverage the latent heat of a Phase Change Material (PCM). The design and performance of PCM-based TES has been well-studied [1]- [3], resulting in a wide range of applications including building [4], [5] and aircraft [6], [7] thermal management, power electronics cooling [8], and combined heating and cooling [9].…”

“…Several MB approaches to TES modeling have recently been proposed [7], [8], [12] but each has limitations. Specifically, the TES devices modeled in both [7] and [12] are limited to operation where heat flows in only one direction through the PCM, i.e., heat always enters on one side and exits on the other. However, many TES devices operate by exchanging heat with a single working fluid flowing through the center of the TES.…”