Tandem filters using frequency selective surfaces for enhanced conversion efficiency in a thermophotovoltaic energy conversion system
- Middle Grove, NY
- Clifton Park, NY
This invention relates to the field of thermophotovoltaic (TPV) direct energy conversion. In particular, TPV systems use filters to minimize parasitic absorption of below bandgap energy. This invention constitutes a novel combination of front surface filters to increase TPV conversion efficiency by reflecting useless below bandgap energy while transmitting a very high percentage of the useful above bandgap energy. In particular, a frequency selective surface is used in combination with an interference filter. The frequency selective surface provides high transmission of above bandgap energy and high reflection of long wavelength below bandgap energy. The interference filter maintains high transmission of above bandgap energy and provides high reflection of short wavelength below bandgap energy and a sharp transition from high transmission to high reflection.
- Research Organization:
- KAPL, Inc
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC12-76SN00052
- Assignee:
- The United States of America as represented by the United States Department of Energy (Washington, DC)
- Patent Number(s):
- 7,790,978
- Application Number:
- 11/548,843
- OSTI ID:
- 989499
- Country of Publication:
- United States
- Language:
- English
| Feasibility assessment of low temperature voltaic energy conversion | report | April 1994 |
Thermodynamic analysis of thermophotovoltaic efficiency and power density tradeoffs
|
journal | March 2001 |
Thermophotovoltaics-development status and parametric considerations for power applications
|
conference | January 1999 |
Sputtered Si:H alloys for edge filters: application to thermophotovoltaics
|
journal | January 2002 |
Similar Records
Thermophotovoltaic Spectral Control
Segregated tandem filter for enhanced conversion efficiency in a thermophotovoltaic energy conversion system