RT info:eu-repo/semantics/article
T1 Thermal storage of nitrate salts as Phase Change Materials (PCMs)
A1 Orozco, Marco A.
A1 Acurio, Karen
A1 Martínez Gómez, Javier
A1 Vásquez Aza, Francis
A1 Chico Proano, Andrés
K1 Inorganic PCMs
K1 Thermal storage
K1 Nitrate salt mixtures
K1 Ciencia de los materiales
K1 Materials science
AB This study presents the energy storage potential of nitrate salts for specific applications in energy systems that use renewable resources. For this, the thermal, chemical, and morphological characterization of 11 samples of nitrate salts as phase change materials (PCM) was conducted. Specifically, sodium nitrate (NaNO3), sodium nitrite (NaNO2), and potassium nitrate (KNO3) were considered as base materials; and various binary and ternary mixtures were evaluated. For the evaluation of the materials, differential Fourier transform infrared spectroscopy (FTIR), scanning calorimetry (DSC), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM) to identify the temperature and enthalpy of phase change, thermal stability, microstructure, and the identification of functional groups were applied. Among the relevant results, sodium nitrite presented the highest phase change enthalpy of 220.7 J/g, and the mixture of 50% NaNO3 and 50% NaNO2 presented an enthalpy of 185.6 J/g with a phase change start and end temperature of 228.4 and 238.6 °C, respectively. This result indicates that sodium nitrite mixtures allow the thermal storage capacity of PCMs to increase. In conclusion, these materials are suitable for medium and high-temperature thermal energy storage systems due to their thermal and chemical stability, and high thermal storage capacity.
PB MDPI
SN 1996-1944
YR 2021
FD 2021-11-26
LK http://hdl.handle.net/10017/50619
UL http://hdl.handle.net/10017/50619
LA eng
DS MINDS@UW
RD 24-abr-2024