Proposal and Evaluation of Subordinate Standard Solar Irradiance Spectra: Preprint
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- German Aerospace Center (DLR)
- Solar Consulting Services
- CIEMAT
- China Meteorological Administration
- Photovoltaic Performance Labs
- University of Antofagasta
- Masdar Institute of Science & Technology
- University of Oregon
This paper introduces a concept for global tilted irradiance (GTI) subordinate standard spectra to supplement the current standard spectra used in solar photovoltaic applications as defined in ASTM G173 and IEC60904. The proposed subordinate standard spectra correspond to atmospheric conditions and tilt angles that depart significantly from the main standard spectrum, and they can be used to more accurately represent various local conditions. For the definition of subordinate standard spectra cases with an elevation 1.5 km above sea level, the question arises whether the air mass should be calculated including a pressure correction or not. This study focuses on the impact of air mass used in standard spectra, and it uses data from 29 locations to examine which air mass is most appropriate for GTI and direct normal irradiance (DNI) spectra. Overall, it is found that the pressure-corrected air mass of 1.5 is most appropriate for DNI spectra. For GTI, a non-pressure-corrected air mass of 1.5 was found to be more appropriate.
- Research Organization:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office
- DOE Contract Number:
- AC36-08GO28308
- OSTI ID:
- 1433599
- Report Number(s):
- NREL/CP-5D00-70318
- Resource Relation:
- Conference: Presented at the International Solar Energy Society Solar World Congress, 29 October - 2 November 2017, Abu Dhabi, United Arab Emirates
- Country of Publication:
- United States
- Language:
- English
Similar Records
Proposed Reference Spectral Irradiance Standards to Improve Photovoltaic Concentrating System Design and Performance Evaluation: Preprint
Spectral Corrections Based on Optical Air Mass: Preprint