Abonnement à la biblothèque: Guest

ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

THE PERFORMANCE INVESTIGATION OF HYDROPHILIC MATERIALS MODIFIED LiOH·H2O BASED COMPOSITE THERMOCHEMICAL MATERIALS FOR LOW TEMPERATURE THERMAL ENERGY STORAGE

Get access (open in a dialog) DOI: 10.1615/IHTC16.cat.023539
pages 1635-1643

Résumé

In this study, the main targets are clean and efficient utilization of low temperature thermal energy and enhance the heat storage property of the materials. Therefore, lithium hydroxide monohydrate as a promising thermochemical energy storage material was selected and modified by impregnation method with hygroscopic materials, such as LiCl, 13X-zeolite and NaY-zeolite. The physical chemical property of the composed thermochemical materials was characterized by Transmission electron micrographs (TEM), X-ray powder diffraction (XRD) and thermogravimetry differential thermal analysis (TGA-DSC). The characterization and performance test results showed that the lithium hydroxide monohydrate particles were well dispersed into nanoscale (30-50 nm) as composed with 13X-zeolite and NaY-zeolite. These composite materials exhibited obviously improved heat storage density and higher hydration rate than pure lithium hydroxide monohydrate. Among these thermochemical materials, LiOH·H2O/13X-zeolite showed the highest heat storage density (1984 kJ/kg), which is 3.0 times higher than the pure lithium hydroxide during the same hydration time and the introduction of hygroscopic materials leads to certain increasing of thermal conductivity for composed thermochemical materials.