Persona:
Ibarra Mollá, Mercedes

Foto de perfil
Dirección de correo electrónico
ORCID
Fecha de nacimiento
Proyectos de investigación
Unidades organizativas
Puesto de trabajo
Apellidos
Ibarra Mollá
Nombre de pila
Mercedes
Nombre

Filtros

2023 - 20252
Restablecer filtros

Ajustes

Fecha de finalización: 2025 × Fecha de inicio: 2020 ×

Resultados de la búsqueda

Mostrando 1 - 2 de 2
  • Miniatura
    Publicación
    Proposal of a microchannel receiver for Fresnel technology to supply solar heat for industrial processes
    (Elsevier, 2023-09-30) Stojceska, V.; Reay, David A.; Montes Pita, María José; Ibarra Mollá, Mercedes
    This work is focused on the linear Fresnel technology to supply solar heat for industrial processes, proposing a new microchannel receiver design for pressurised gases. This design consists of two absorber panels converging at the focal line of the Fresnel system; each of these panels consists of a compact core fin structure attached to both front and back plates. The fluid flows through the receiver along its length in several passes, so that the compactness is constant and greater than in the previous pass. This arrangement improves heat transfer and, therefore, the cooling of the more thermally stressed areas of the panel, without over penalising the pressure drop. A thermal resistance model has been formulated to quantify the fluid heating along the panel length and the thermal gradient along the panel thickness. This model has been used to perform a thermo-exergy optimisation based on several characteristic parameters: the aperture half-angle of the cavity shaped by the two converging panels; and the channels dimensions in each pass of the panel. For each of these parameters, a maximum exergy efficiency has been obtained accounting for the receiver heat losses, the fluid pressure drop and the optical performance of the primary mirror field.
  • Miniatura
    Publicación
    Steady-state analysis of an innovative rotatory Fresnel collector integrated into two industrial processes
    (Elsevier, 2025-04-01) Ibarra Mollá, Mercedes; Barbero Fresno, Rubén; Rovira de Antonio, Antonio José; https://orcid.org/0000-0001-9859-2435; https://orcid.org/0000-0002-6033-1309; https://orcid.org/0000-0002-6810-3757
    This study compares the performance of two solar thermal systems, MAND and AMTP, designed for industrial process heat using a rotating Fresnel collector (Sundial) and Phase Change Material (PCM) thermal energy storage (TES). The systems differ in their latitude and in their demand profiles: MAND, located at low latitude, has a continuous 24-hour demand, while AMTP, located at high latitude, has a daytime-only demand. Through steady-state simulations, both daily and yearly performance were analyzed to assess the impact of these differences on system behavior. The designed system achieved annual energy outputs of 26,34 MWh and 25,37 MWh for the two case studies, over the prescribed target of 25 MWh and capacity factors of 30,34% and 32,11%. Results demonstrate that TES plays distinct roles in each system, with carryover storage being crucial for MAND and maximizing heat exchanger operation being more important for AMTP. The analysis highlights the importance of tailoring system design and control strategies to specific industrial process requirements and demonstrated the feasibility of integrating the ASTEP system for industrial applications, even with not favorable conditions like high latitude and daytime-only demand.