Phase II Final Project Report SBIR Project: "A High Efficiency PV to Hydrogen Energy System"

Slade, A ; Turner, J ; Stone, K ; McConnell, R

关键词: photovoltaics;    hydrogen;    solar;    concentrator;    silicon;    multijunction;   

DOI  :  10.2172/936568
RP-ID  :  DOE/ER/83900-2 Final Report
PID  :  OSTI ID: 936568

学科分类：再生能源与代替技术

美国|英语

来源: SciTech Connect

【 摘 要 】

The innovative research conducted for this project contributed greatly to the understanding of generating low-cost hydrogen from solar energy. The project’s research identified two highly leveraging and complementary pathways. The first pathway is to dramatically increase the efficiency of converting sunlight into electricity. Improving solar electric conversion efficiency directly increases hydrogen production. This project produced a world record efficiency for silicon solar cells and contributed to another world record efficiency for a solar concentrator module using multijunction solar cells. The project’s literature review identified a second pathway in which wasted heat from the solar concentration process augments the electrolysis process generating hydrogen. One way to do this is to use a “heat mirror” that reflects the heat-producing infrared and transmits the visible spectrum to the solar cells; this also increases solar cell conversion efficiency. An economic analysis of this concept confirms that, if long-term concentrator photovoltaic (CPV) and solid-oxide electrolyzer cost goals can be achieved, hydrogen will be produced from solar energy cheaper than the cost of gasoline. The potential public benefits from this project are significant. The project has identified a potential energy source for the nation’s future electricity and transportation needs that is entirely “home grown” and carbon free. As CPV enter the nation’s utility markets, the opportunity for this approach to be successful is greatly increased. Amonix strongly recommends further exploration of this project’s findings.