Thermodynamics 2.0 | 2022 Program: Sessions and Abstracts
Mon - Wed, July 18 - July 20 , 2022 , Boone, North Carolina
Session T11: Thermodynamics and Sustainability
16:15-17:30. Tuesday July 19, 2022
Chair: Arezou Sadough
Title: Optimal Truncation Criterion for Compound Parabolic Collectors: A Thermodynamic Justification
Bio-sketch
Mechanical Engineer (Honours course at Faculty of Engineering of the UAEM); the dissertation was awarded as winner of the XXVI National Thesis AwardsXXVI National Thesis Awards by INEEL. Master’s Studies in Renewable Energies (UNEATLÁNTICO), Master’s in Environmental Management and Auditing (UNINI) and Master’s in Engineering Sciences (Honours course at Faculty of Engineering of the UAEM). Active member of ASME, ISES and E4C since 2013. Journal referee for Renewable Energy and Solar Energy of Elsevier. Professor and research assistant at the Faculty of Engineering in the Department of Engineering in Sustainable Energy Systems in the Universidad Autónoma del Estado de México. Current lines of research and development focus on the formulation of finite-time thermodynamic models and maximization of exergy for solar power plants, and the design of solar concentrators for dry sterilization, direct steam generation and wastewater treatment using primarly nonimaging optics.
Author(s):
(Universidad Autónoma del Estado de México, México )
Abstract:T11.103
Abstract
The origin of compound parabolic concentrators (CPC) can be traced back to the mid-’60s by the developments of Baranov (USSR), Ploke (Germany), and Winston (USA), who independently described an optical system, unlike traditional systems, based on the optimal transfer of radiation, even if this implies forming aberrations, which allows reaching the thermodynamic limit for solar concentrators.
Today, there is already a wide development of CPCs for solar applications, and several geometries have been generated that take advantage of non-imaging optics to concentrate solar energy on receivers of different shapes (circular, square, triangular, wedge, flat…). One problem with CPCs is that the ratio of height vs. area of the receiver (slenderness) is too large, i.e. these concentrators are too high, and this ultimately limits their application. For several years, different truncation criteria have been proposed to decrease the total height, although all have been developed from a purely geometrical perspective. However, it is possible to derive one of them from a thermodynamic perspective, which allows us to call it an optimal truncation criterion.
Keywords: CPC, truncation, optimization, thermodynamic limit, solar energy