Prof. Dr. Julio J. Melero

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Academic Career Length

32Years (1995-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 February 2018 in Renewable and Sustainable Energy Reviews

Journal Article

Lifetime extension of onshore wind turbines: A review covering Germany, Spain, Denmark, and the UK

Lisa Ziegler

Elena Gonzalez

Tim Rubert

Ursula Smolka

Julio J. Melero

A significant number of wind turbines will reach the end of their planned service life in the near future. A decision on lifetime extension is complex and experiences to date are limited. This review presents the current state-of-the-art for lifetime extension of onshore wind turbines in Germany, Spain, Denmark, and the UK. Information was gathered through a literature review and 24 guidelinebased interviews with key market players. Technical, economic and legal aspects are discussed. Results indicate that end-of-life solutions will develop a significant market over the next five years. The application of updated load simulation and inspections for technical lifetime extension assessment differs between countries. A major concern is the uncertainty about future electricity spot market prices, which determine if lifetime extension is economically feasible

1 February 2019 in Renewable Energy

Journal Article

Using high-frequency SCADA data for wind turbine performance monitoring: A sensitivity study

Elena Gonzalez

Bruce Stephen

David Infield

Julio J. Melero

16 October 1999 in Journal of the American Chemical Society

Journal Article

Magnetic Excitations in Polyoxometalate Clusters Observed by Inelastic Neutron Scattering: Evidence for Anisotropic Ferromagnetic Exchange Interactions in the Tetrameric Cobalt(II) Cluster [Co₄(H₂O)₂(PW₉O₃₄)₂]^10-. Comparison with the Magnetic and Specific Heat Properties

Hanspeter Andres

Juan M. Clemente-Juan

Michael Aebersold

Hans U. Güdel

Eugenio Coronado Miralles

Ramón Burriel

1 January 2018 in Reliability Engineering & System Safety

Journal Article

Data-driven learning framework for associating weather conditions and wind turbine failures

Maik Reder

Nurseda Yildirim Yurusen

Julio J. Melero

1 October 2017 in Energy Procedia

Journal Article

Key Performance Indicators for Wind Farm Operation and Maintenance

Elena Gonzalez

Emmanouil M. Nanos

Helene Seyr

Laura Valldecabres

Nurseda Yildirim Yurusen

Julio J. Melero

1 July 2000 in Physical Review B

Journal Article

Specific heat and magnetic interactions in

{NdCrO}_{3}

Fernando Bartolomé

Juan Bartolomé

Miguel Castro Corella

Julio J. Melero

The specific heat of

{NdCrO}_{3}

in the thermal range from 0.3 to 300 K is presented. The magnetic ordering of Cr ions at

T_{N} = 219 \pm 1 K

is observed, as well as the spin reorientation transition (SRT) at

T_{SRT} = 34.2 \pm 0.5 K .

The specific heat of the isostructural nonmagnetic compound

{LaGaO}_{3}

has been subtracted, allowing us to separate and quantify the different magnetic contributions to the specific heat in

{NdCrO}_{3} .

The exchange coupling constant for the Cr-Cr interaction is found to be

| J_{Cr} | {/ k}_{B} = 21.7 (7) K .

The fitting of the Schottky contribution from the thermal depopulation of the

{Nd}^{3 +}^{4} I_{9 / 2}

ground multiplet allows us to propose a crystal-field energy-level scheme which is in agreement with the available neutron-scattering spectral lines. The intensity of the Nd-Cr magnetic interaction is obtained. Finally, we show that the strength of the Nd-Cr interaction in this compound is of the same order of magnitude as that found in other Nd orthoperovskites, namely, in

{NdFeO}_{3},

despite the different Zeeman splitting of the Nd ground doublet in both compounds.

About Me

Julio J. Melero is an Associate Professor at the Department of Electrical Engineering of the University of Zaragoza and currently is the Director of the Joint Research Institute of the Energy and Resource Efficiency of Aragón, ENERGAIA. He completed his PhD studies in Physics at the University of Zaragoza. He has recently led several research projects. Among them, it is worth highlighting the ENSURE project on Ecological Transition in Rural Areas, funded by the Spanish government, and the TWEED project, a Marie Curie Doctoral Network dedicated to the Digitalization of Wind Energy, which will train 12 new PhDs and is funded by the European Union. In addition to these, he has also led more than thirty public and private research projects. He has published more than 60 articles in high-impact scientific journals indexed in the Scopus database, with approximately 1,400 citations, and has an h-index of 16. He has served as a reviewer for around 12 scientific journals and is currently an associate editor of the journal Wind Energy. His research interests include power quality, wind energy, PV systems, and the application of artificial intelligence to problems in renewable energy and power systems.

Prof. Dr. Julio J. Melero

Prof. Dr. Julio J. Melero

Research Focus & Metrics

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Representative Publications

About Me