RT Journal Article
T1 Solid-to-solid phase change transitions to enhance solar heat storage of bitumen used in domestic hot water collectors
A1 García Márquez, Beatriz
A1 Partal López, Pedro
A1 Navarro Domínguez, Francisco Javier
A1 Delgado Sánchez, Clara
A1 Cuadri Vega, Antonio Abad
AB The reduction of energy consumption in buildings requires the development of advanced thermal energy storage (TES) materials. In this work, the feasibility of TES materials to be applied in solar domestic hot water (DHW) collectors was evaluated. These TES materials are composed of bitumen (B) and different concentrations of pentaglycerine (PG), which act as supporting engineering material with high solar radiation absorptivity and solid-to-solid phase change material, respectively. Results indicate that these TES materials show good thermal stability, whereas their consistency improves as PG content increases over the whole temperature range at which a solar DHW collector operates. Interestingly, blend containing 30 wt% PG shows a high heat storage capacity (ca. 50 J/g), suitable thermal cycling reliability and excellent relative enthalpy efficiency (ca. 90 %). In addition, this binder also presents improved thermal properties (thermal conductivity and specific heat capacity). As a result, the heat charge/discharge performance evaluated by indoor thermoregulation tests leads to a Latent Heat Thermoregulation Index (LHTI) higher than those reported for other TES building materials. Therefore, B/PG blends may be considered a promising TES material for improving energy efficiency in solar DHW production.
PB Elsevier
SN 0950-0618
SN 1879-0526 (electrónico)
YR 2025
FD 2025
LK https://hdl.handle.net/10272/27180
UL https://hdl.handle.net/10272/27180
LA eng
NO García-Márquez, B., Partal, P., Navarro, F. J., Delgado-Sánchez, C., & Cuadri, A. A. (2025). Solid-to-solid phase change transitions to enhance solar heat storage of bitumen used in domestic hot water collectors. Construction and Building Materials, 495, 143681. https://doi.org/10.1016/j.conbuildmat.2025.143681
NO This work is part of the project PID2023–149701OA-I00 funded by MCIN/AEI/10.13039/501100011033 (Spanish Ministry of Science, Innovation and Universities) and ERDF "A way of making Europe". C. Delgado-Sánchez acknowledges financial support from the EMERGIA research program (DGP_EMEC_2023_00091) from Consejería de Universidad, Investigación e Innovación (Junta de Andalucía). Funding for open access charge: Universidad de Huelva / CBUA.
DS Repositorio Institucional de la Universidad de Huelva
RD 31 may 2026