Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Alfredo Ortiz Fernández"'
Autor:
Agustín Santisteban, Cristian Olmo, Alfredo Ortiz Fernández, Fernando Delgado, Ramazan Altay, Felix Ortiz, Carlos J. Renedo
Publikováno v:
IEEE Access, 2020, 8, 207054-207062
UCrea Repositorio Abierto de la Universidad de Cantabria
Universidad de Cantabria (UC)
IEEE Access, Vol 8, Pp 207054-207062 (2020)
UCrea Repositorio Abierto de la Universidad de Cantabria
Universidad de Cantabria (UC)
IEEE Access, Vol 8, Pp 207054-207062 (2020)
The very high-power transformer lifespan depends mainly on the temperature that cellulose insulation reaches during its operation. Traditionally, its cooling has been carried out using mineral oil as coolant. Nowadays, alternative ester-based liquids
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6fb318e4fb9a9f3174e9a43138dfcf43
http://hdl.handle.net/10902/20279
http://hdl.handle.net/10902/20279
Autor:
Masahiro Kozako, Alfredo Ortiz Fernández, Motoo Tsuchie, Cristina Mendez Gutierrez, Masayuki Hikita, Hikaru Araki, Taichi Yamada
Publikováno v:
International Conference on Dielectrics (ICD 2020)
3rd IEEE International Conference on Dielectrics (ICD), Valencia, 2020, 732-735
UCrea Repositorio Abierto de la Universidad de Cantabria
Universidad de Cantabria (UC)
2020 IEEE 3rd International Conference on Dielectrics (ICD)
3rd IEEE International Conference on Dielectrics (ICD), Valencia, 2020, 732-735
UCrea Repositorio Abierto de la Universidad de Cantabria
Universidad de Cantabria (UC)
2020 IEEE 3rd International Conference on Dielectrics (ICD)
In this paper, dielectric properties (BDV and permittivity) of two vegetable oils (Palm Fatty Acid Ester and FR3) used in power transformers are studied. Also, partial discharge inception voltage (PDIV) of Kraft paper impregnated with these oils is m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ef3577452ccdc91610a6eaeae64ee6a2
Autor:
Fernando Delgado, Felix Ortiz Fernandez, Agustín Santisteban, Carlos Javier Renedo Estébanez, Inmaculada Fernandez, Alfredo Ortiz Fernández
Publikováno v:
19th IEEE International Conference on Dielectric Liquids (ICDL), Manchester, 2017, 444-447
UCrea Repositorio Abierto de la Universidad de Cantabria
Universidad de Cantabria (UC)
UCrea Repositorio Abierto de la Universidad de Cantabria
Universidad de Cantabria (UC)
This work compares the temperature distribution and hot-spot temperatures obtained in a disc-type winding of a power transformer when using as dielectric liquid a mineral oil or natural esters. The comparison is made with a reference case for mass fl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::37384a143e6a0d4f2f81033df5332f15
http://hdl.handle.net/10902/13369
http://hdl.handle.net/10902/13369
Autor:
Félix Ortiz Fernández, Cristian Olmo Salas, Cristina Fernández Diego, Alfredo Ortiz Fernández, Juan Carcedo Haya
Publikováno v:
Renewable Energy & Power Quality Journal (RE&PQJ), 2016, 1(14), 720-724
International Conference on Renewable Energies and Power Quality (ICREPQ'16), Madrid
UCrea Repositorio Abierto de la Universidad de Cantabria
instname
International Conference on Renewable Energies and Power Quality (ICREPQ'16), Madrid
UCrea Repositorio Abierto de la Universidad de Cantabria
instname
Power transformers are electrical machines which are one of the most critical components in power distribution systems worldwide. Their failure generally is due to the degradation of its insulating system (insulating oil and paper insulation). This d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c5e0b85689ebd95f99bf590c571d7f86
http://hdl.handle.net/10902/10978
http://hdl.handle.net/10902/10978
Autor:
Inmaculada Fernández Diego, Manuel Fernández Fernández, Carlos Javier Renedo Estébanez, Severiano Pérez Remesal, Alfredo Ortiz Fernández, Mario Mañana Canteli
Publikováno v:
DYNA INGENIERIA E INDUSTRIA. 86:105-117
In the world there are a large number of foundry factories that, thanks to their production processes, are great energy consumers. The factories are equipped with various types of furnaces such as gas, electric induction and the cupola furnace. The s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::16c329ee54364cc74c489697792a8f2f
https://doi.org/10.6036/3866
https://doi.org/10.6036/3866
Autor:
Felix Ortiz Fernandez, Agustín Santisteban, Carlos Javier Renedo Estébanez, Inmaculada Ortiz, Cristian Olmo, Alfredo Ortiz Fernández
Publikováno v:
Energies, Vol 11, Iss 2, p 419 (2018)
Energies; Volume 11; Issue 2; Pages: 419
Energies, 2018, 11(2), 419
UCrea Repositorio Abierto de la Universidad de Cantabria
Universidad de Cantabria (UC)
Energies; Volume 11; Issue 2; Pages: 419
Energies, 2018, 11(2), 419
UCrea Repositorio Abierto de la Universidad de Cantabria
Universidad de Cantabria (UC)
Transformers are installed in power distribution systems to perform changes in supply voltage. Large consumers often have several transformers installed in parallel to ensure continuity of supply in the event of failure. These machines can achieve ve
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f64c55e1477f25a809c9491eebde54b2
https://doi.org/10.3390/en11020419
https://doi.org/10.3390/en11020419
Autor:
Alfredo Ortiz Fernández, Faustino Alarcón Valero, Fernando Cruz Peragón, M. A. Bengoechea, María del Mar Eva Alemany
Publikováno v:
Boletín de la Sociedad Española de Cerámica y Vidrio, Vol 46, Iss 1, Pp 21-28 (2007)
The improvement of the customer service level is a key aspect in the competitive positioning of the ceramic sector companies. Within this context of improving the customer service level, the concept of “Product Pack” (P-P) arises as a mean to ach
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b7a68cdbe86f03c0e775dc228a1cf5b
http://ceramicayvidrio.revistas.csic.es/index.php/ceramicayvidrio/article/view/260/278
http://ceramicayvidrio.revistas.csic.es/index.php/ceramicayvidrio/article/view/260/278
Publikováno v:
IEEE Transactions on Power Delivery. 21:1101-1105
The utilization of Clarke's transformation in the estimation of power system frequency provides the classical single-phase methods with more robustness because the estimated frequency is computed using the information provided by the three-phase volt
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fd11ea361725bd9654c6b4119a088996
https://doi.org/10.1109/tpwrd.2006.875856
https://doi.org/10.1109/tpwrd.2006.875856
Autor:
Carlos Javier Renedo Estébanez, Severiano Pérez Remesal, Félix Ortiz Fernández, Alfredo Ortiz Fernández, Mario Mañana Canteli, Fernando Delgado San Román, Delfín Silió Salcines
Publikováno v:
Renewable Energy and Power Quality Journal (RE&PQJ), 2007, 1(5), 437-441
International Conference on Renewable Energies and Power Quality (ICREPQ’07), Sevilla
UCrea Repositorio Abierto de la Universidad de Cantabria
Universidad de Cantabria (UC)
International Conference on Renewable Energies and Power Quality (ICREPQ’07), Sevilla
UCrea Repositorio Abierto de la Universidad de Cantabria
Universidad de Cantabria (UC)
In air conditioning facilities most of the energy consumption corresponds to the thermal production, this being heat and cold. It depends on many factors, one of the most important in the use of more efficient devices (boilers, chillers and heat pump
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::79fc7b9229889aa0c4136a260705c47e
http://hdl.handle.net/10902/19559
http://hdl.handle.net/10902/19559
Autor:
Alfredo Ortiz Fernández, Jaime Peredo Argos, Carlos Javier Renedo Estébanez, Delfín Silió Salcines
Publikováno v:
Renewable Energy and Power Quality Journal (RE&PQJ), 2004, 1(2), 34-41
International Conference on Renewable Energies and Power Quality (ICREPQ’04), Barcelona
UCrea Repositorio Abierto de la Universidad de Cantabria
Universidad de Cantabria (UC)
International Conference on Renewable Energies and Power Quality (ICREPQ’04), Barcelona
UCrea Repositorio Abierto de la Universidad de Cantabria
Universidad de Cantabria (UC)
The District Heating systems (DH) are distribution systems of thermal energy, normally in the way of hot water that is supplied to great areas of population, so the users of these systems use them in the heating of their buildings and in the preparat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::98855a0d9342ce698274f8d66af0d922
http://hdl.handle.net/10902/19591
http://hdl.handle.net/10902/19591