Thermodynamic Performance of a Brayton Pumped Heat Energy Storage System: Influence of Internal and External Irreversibilities

Autor: David Pérez-Gallego, Julian Gonzalez-Ayala, Antonio Calvo Hernández, Alejandro Medina

Publikováno v: Entropy, Vol 23, Iss 12, p 1564 (2021)

A model for a pumped thermal energy storage system is presented. It is based on a Brayton cycle working successively as a heat pump and a heat engine. All the main irreversibility sources expected in real plants are considered: external losses arisin

Externí odkaz: https://doaj.org/article/9bb63b3e3b52431fa0cc67d6e28c906e

A Possible Cosmological Application of Some Thermodynamic Properties of the Black Body Radiation in n-Dimensional Euclidean Spaces

Autor: Julian Gonzalez-Ayala, Jennifer Perez-Oregon, Rubén Cordero, Fernando Angulo-Brown

Publikováno v: Entropy, Vol 17, Iss 7, Pp 4563-4581 (2015)

In this work, we present the generalization of some thermodynamic properties of the black body radiation (BBR) towards an n-dimensional Euclidean space. For this case, the Planck function and the Stefan–Boltzmann law have already been given by Land

Externí odkaz: https://doaj.org/article/999d9b38c29c4358bdfd498cca31542a

Carnot-Like Heat Engines Versus Low-Dissipation Models

Autor: Julian Gonzalez-Ayala, José Miguel M. Roco, Alejandro Medina, Antonio Calvo Hernández

Publikováno v: Entropy, Vol 19, Iss 4, p 182 (2017)

In this paper, a comparison between two well-known finite time heat engine models is presented: the Carnot-like heat engine based on specific heat transfer laws between the cyclic system and the external heat baths and the Low-Dissipation model where

Externí odkaz: https://doaj.org/article/9dd2ba80fd13418e94dbcb1d4a53075f

Stability under limited control in weakly dissipation cyclic heat engines

Autor: José Miguel Mateos Roco, Julian Gonzalez-Ayala, Alejandro Medina Domínguez, Antonio Calvo Hernández

Publikováno v: Proceedings of Entropy 2021: The Scientific Tool of the 21st Century.

In this work we study the effect of natural stability mechanisms in stochastic trajectories produced by deviations of the operation regime due to fluctuations on the heat exchanges between the heat device and the thermal reservoirs. Perturbations on

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f7e9cd52eb9e0edd6f62bf5c366bec60
https://doi.org/10.3390/entropy2021-09863

The equivalent low-dissipation combined cycle system and optimal analyses of a class of thermally driven heat pumps

Autor: José Miguel Mateos Roco, Julian Gonzalez-Ayala, Alejandro Medina, A. Calvo Hernández, Hanxin Yang, Juncheng Guo

Publikováno v: GREDOS. Repositorio Institucional de la Universidad de Salamanca
instname
GREDOS: Repositorio Institucional de la Universidad de Salamanca
Universidad de Salamanca (USAL)

The performance characteristics, operation, and design strategies of a class of thermally driven heat pumps are investigated due to their important roles in the efficient utilization of low-grade thermal energy. In order to establish a more generic t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::58fc1ae02ad5cec91ddb088c535e6653
https://doi.org/10.1016/j.enconman.2020.113100