scholarly journals c-Si PV cells emissivity characterization at low operating temperatures for efficiency management

2020 ◽  
Vol 307 ◽  
pp. 01044
Author(s):  
Raquel Fuente ◽  
Telmo Echániz ◽  
Iñigo González de Arrieta ◽  
Irene Urcelay-Olabarria ◽  
Manuel J. Tello ◽  
...  
Keyword(s):  
Solar Cell ◽  
Basque Country ◽  
Radiative Properties ◽  
Passive Cooling ◽  
Infrared Emissivity ◽  
Thermal Radiative Properties ◽  
Si Solar Cells ◽  
Directional Emissivity ◽  
The University ◽  
Emissivity Measurements

Efficiency is a critical parameter for a solar cell to be successful and is closely related to the working temperature of the cell. In turn, the temperature can be related to the infrared emissivity, the parameter that governs the thermal radiative properties of a body. In particular, the importance of infrared emissivity in a solar cell is essential in passive cooling applications, where controlled radiative thermal losses could let the cell operate at lower temperatures, the range where they present higher efficiency. In this presentation, the emissivity of c-Si solar cells in the low temperature range (around 50 ºC) is discussed. Traditionally, it has been determined by indirect reflectivity measurements at ambient temperature and extrapolated to working temperatures, but here, a direct measurement is proposed. For an accurate value the measurements are performed in the high accuracy radiometer of the University of the Basque Country, which allows spectral directional emissivity measurements as a function of temperature.

scholarly journals Updated measurement method and uncertainty budget for direct emissivity measurements at the University of the Basque Country

Metrologia ◽  
2020 ◽  
Vol 57 (4) ◽  
pp. 045002
Author(s):  
I González de Arrieta ◽  
T Echániz ◽  
R Fuente ◽  
J M Campillo-Robles ◽  
J M Igartua ◽  
...  
Keyword(s):  
Measurement Method ◽  
Basque Country ◽  
Uncertainty Budget ◽  
The University ◽  
Emissivity Measurements

scholarly journals The environmental and social footprint of the university of the Basque Country UPV/EHU

2021 ◽  
pp. 128019
Author(s):  
G. Bueno ◽  
M. de Blas ◽  
E. Pérez-Iribarren ◽  
I. Zuazo ◽  
E. Torre-Pascual ◽  
...  
Keyword(s):  
Basque Country ◽  
The University

scholarly journals A Holistic Approach to Integrate and Evaluate Sustainable Development in Higher Education. The Case Study of the University of the Basque Country

2021 ◽  
Vol 13 (1) ◽  
pp. 392
Author(s):  
Estibaliz Sáez de Cámara ◽  
Idoia Fernández ◽  
Nekane Castillo-Eguskitza
Keyword(s):  
Higher Education ◽  
Sustainable Development ◽  
Basque Country ◽  
Holistic Approach ◽  
Institutional Setting ◽  
Practical Case ◽  
Development Indicators ◽  
Agenda 2030 ◽  
The University

Since the United Nations (UN) approved the Agenda 2030 for Sustainable Development in 2015, higher education institutions have increasingly demonstrated their commitment by supporting several initiatives. Although a great deal of progress has been made, there is still a lack of integrative approaches to truly implement Sustainable Development Goals (SDGs) in higher education. This paper presents a practical case that illustrates how to design and articulate SDGs within an institutional setting adopting a holistic approach: EHUagenda 2030 plan of the University of the Basque Country (UPV/EHU). It is based on empirical inquiry into global and holistic sustainable transformation and a real experience to move towards a verifiable and pragmatic contribution to sustainability. This plan describes the contribution to 12 of the 17 SDGs, along with three sectorial plans (Equality Campus, Inclusion Campus and Planet Campus), as well as the refocus of the UPV/EHU’s Educational Model and the panel of sustainable development indicators, which addresses the technical aspects of monitoring the SDGs. The methodology (mapping; mainstreaming; diagnosis and definition and, finally, estimation) is systematic and replicable in other universities yet to embark upon this integration. This case study makes a contribution towards the understanding of the complexity of the changes in Higher Education and the ways to approach it.

scholarly journals Emissivity measurements on reflective insulation materials

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Albert Adibekyan ◽  
Elena Kononogova ◽  
Jacques Hameury ◽  
Marcus Lauenstein ◽  
Christian Monte ◽  
...  
Keyword(s):  
Power Generation ◽  
Absolute Measurement ◽  
Radiative Properties ◽  
Major Objective ◽  
Insulation Materials ◽  
Industrial Sectors ◽  
Accurate Knowledge ◽  
Satellite Applications ◽  
Total Hemispherical Emissivity ◽  
Emissivity Measurements

Abstract The development and use of new thermal insulation products in many industrial sectors, ranging from building insulations to power generation or satellite applications, requires the accurate knowledge of the radiative properties of the investigated material, i. e. its emissivity. A major objective of the research project “Improvement of emissivity measurements on reflective insulation materials” within the framework of the European Metrology Programme for Innovation and Research was to improve and validate reference techniques for the measurement of the total hemispherical emissivity of low emissivity foils with an absolute measurement uncertainty below 0.03. The calibration and measurement procedures developed within this project shall lead to a significant benefit for industrial manufacturers of reflective foils as well as for the end-users of the industrial instruments used to characterize them.

Transient And Spatial Radiative Properties Of Patterned Wafers During Rapid Thermal Processing

1995 ◽  
Vol 387 ◽  
Author(s):  
Peter Y. Wong ◽  
Ioannis N. Miaoulis ◽  
Cynthia G. Madras
Keyword(s):  
Heat Transfer ◽  
Heat Source ◽  
Thermal Processing ◽  
Rapid Thermal Processing ◽  
Temporal Variations ◽  
Radiative Properties ◽  
Wafer Surface ◽  
Patterned Wafers ◽  
Thermal Radiative Properties ◽  
Dynamic Variations

AbstractTemperature measurements and processing uniformity continue to be major issues in Rapid Thermal Processing. Spatial and temporal variations in thermal radiative properties of the wafer surface are sources of non-uniformities and dynamic variations. These effects are due to changes in spectral distribution (wafer or heat source), oxidation, epitaxy, silicidation, and other microstructural transformations. Additionally, other variations are induced by the underlying (before processing) and developing (during processing) patterns on the wafer. Numerical simulations of Co silicidation that account for these factors are conducted to determine the radiative properties, heat transfer dynamics, and resultant processing uniformity.

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