Study of a urea-based phase change material for thermal energy storage

  1. Quant Colón, Laura Marcela
Supervised by:
  1. Jean Pierre Bedecarrats Director
  2. Ane Miren Garcia Romero Director

Defence university: Universidad del País Vasco - Euskal Herriko Unibertsitatea

Fecha de defensa: 15 October 2020

  1. Ana Lazaro Fernandez Chair
  2. Jalel Labidi Secretary
  3. Yves Le Guer Committee member
  1. Ingeniería Minera y Metalúrgica y Ciencia de los Materiales

Type: Thesis

Teseo: 660653 DIALNET


This work presents a contribution to the LHTES technology by working on both PCM materials and storage systems that are technically and economically viable for their integration in buildings. The previously identified urea-sodium nitrate eutectic mixture was studied to determine technical aspects regarding the material hygroscopic behavior handling, thermal degradation, supercooling and phase segregation. The characterization of these parameters serve to evaluate feasibility of the mixture as a PCM, because they can jeopardize the long-term use of the PCM and the efficiency of the heat storage. The study of the material include the development of methodologies that are more practical and representative of the operation in the final application than the traditionally used in PCM characterization. In addition, the thermal behavior of an existent industrial shell and tubes heat exchanger, modified for its use as latent heat thermal energy storage device, was studied to understand the thermal behavior of such systems with the objective of reducing costs.