DOE Solar Energy Technologies Program

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DOE Solar Energy Technologies Program ( doe-solar-energy-technologies-program )

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Solar Resource Characterization Performing Organization: National Renewable Energy Laboratory (NREL) Key Technical Contact: Dave Renné, 303-384-7408, david_renne@nrel.gov DOE HQ Technology Manager: Jeffrey Mazer, 202-586-2455, jeffrey.mazer@ee.doe.gov FY 2005 Budget: $450K ____________________________________________________________________________________ Objectives • Produce a 10-year update (1991–2000) of the National Solar Radiation Data Base (NSRDB). • Produce an enhanced 10-km gridded data solar product for the United States. • Organize and implement a new task called “Solar Resource Knowledge Management” under the International Energy Agency (IEA) Solar Heating and Cooling (SHC) Programme. Accomplishments • Evaluated performance of three candidate solar radiation models for the NSRDB. • Developed recommendations for an NSRDB update plan. • Task 36 “Solar Resource Knowledge Management” approved by the IEA SHC with NREL serving as Operating Agent. Future Directions • Produce and distribute a 10-year update along with single-year annual updates. • Investigate methods of producing a 10-km gridded data set for 199–1998. • Produce reports through the IEA Task 36 that benchmark and quantify various solar resource assessment approaches developed by different countries and international institutions, including NREL’s NSRDB. ____________________________________________________________________________________ 1. Introduction This project addresses solar resource assessment as outlined in the DOE Solar Program Multi-Year Technical Plan. This includes access to data and characterization of the solar resource, as well as the needs of designers, modelers, and resource assessment interests, both in the United States and internationally. This is a multi-year project to update the 1961–1990 National Solar Radiation Data Base (NSRDB) and to implement the IEA “Solar Resource Knowledge Management” Task for benchmarking international solar resource data sets. Work performed in FY 2005 included: (1) recommendations for an NSRDB update and (2) development of an updated plan and Annex and IEA approval of the “Solar Resource Knowledge Management” task. In 1992, NREL released the 1961–1990 NSRDB, a 30-year, 239-station data set of measured and modeled solar radiation and accompanying meteorological data for the United States. In 2003, NREL investigated the feasibility of producing a 1991–2000 update of the NSRDB and devised a proof-of-concept project to investigate solutions to several obstacles, including the switchover by the National Weather Service (NWS) to the Automated Surface Observing System for routine meteorological observations. In 1998, NREL hosted the first workshop on satellites for solar resource assessments, bringing together international researchers on the topic. Two follow-up workshops were held, one in 2000 and one in 2003, leading to the development of a concept paper and work plan for an International Energy Agency “Solar Resource Knowledge Management” task. In June 2005, this task was approved as Task 36 under the Solar Heating and Cooling Programme, and NREL was selected as the Operating Agent. This task links NREL’s domestic NSRDB research activities with the international solar resource assessment work conducted by several agencies around the world. Photovoltaic R&D Fundamental Research 33

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