摘要:

Thermophotovoltaics utilizing broadband and selective emitters require of various materials for a wide range of temperatures and environments. Currently, materials are available that will operate successfully in both vacuum and oxidizing ambients at temperatures of up to 1500 C. The use of silicon carbide (SiC) of various dimensions in applications such as heat exchangers and molten metal transfer lends credence to the expectation that it can be adapted for use as the emitter of the TPV system. New materials, composites, emissive coatings and control of micro‐structure can be used to achieve improved radiant efficiency. (AIP) ©1995 American Institute of Physics.

ISSN:0094-243X    

DOI:10.1063/1.47048

出版商:AIP    

年代:1995

数据来源: AIP

摘要:

This workshop focused on the portion of the TPV system that involves the photovoltaic energy converter and the spectral control element that affects subband‐gap photon energy recovery. The discussion was divided into three major topic areas: status of the technology, status of the infrastructure, and champions of the technology. (AIP) ©1995 American Institute of Physics.

ISSN:0094-243X    

DOI:10.1063/1.47063

出版商:AIP    

年代:1995

数据来源: AIP

摘要:

For this well attended (∼50), the discussion was divided into two parts. In the first part, potential sponsors of TPV research were identified and other related technical fields that might supply useful information to aid TPV development were discussed. The status of emitter and filter technology was covered in the second part of the discussion. A question and answer format was used in the discussion. (AIP) ©1995 American Institute of Physics.

ISSN:0094-243X    

DOI:10.1063/1.47038

出版商:AIP    

年代:1995

数据来源: AIP

摘要:

Cooling the PV converter increases the overall TPV system efficiency, and more than offsets the losses incurred in providing cooling systems. Convective air flow methods may be sufficient, and several standard water cooling systems, including thermo‐syphon radiators, capillary pumps or microchannel plates, are available. Recuperation is used to increase system efficiency, rather than to increase the emitter temperature. Recuperators operating at comparable high temperatures, such as in high temperature turbines have worked effectively. ©1995 American Institute of Physics.

ISSN:0094-243X    

DOI:10.1063/1.47021

出版商:AIP    

年代:1995

数据来源: AIP

ISSN:0094-243X    

DOI:10.1063/1.47027

出版商:AIP    

年代:1995

数据来源: AIP

摘要:

An experimental investigation of low temperature thermo photo voltaic (TPV) power conversion has been completed in the temperature range of 800 °C–1000 °C. Experimental results include: 1) current‐voltage characteristics of Indium‐Gallium‐Arsenide (InGaAs) cells with bandgaps ranging from .73 ev to .52 ev, 2) spectral control characteristics of dichroic interference and semiconductor plasma filters, and 3) design and operational characteristics of a 30 watt TPV power module. Analysis results are presented to demonstrate understanding of process physics. Results support the feasibility of low temperature TPV energy conversion. ©1995 American Institute of Physics.

ISSN:0094-243X    

DOI:10.1063/1.47032

出版商:AIP    

年代:1995

数据来源: AIP

摘要:

New GaSb photovoltaic cells with infrared response extended out to 1.8 microns are well matched to hydrocarbon combustion heated silicon carbide infrared emitters operating at 1600 C. Power densities of up to 10 Watts/cm2promise to make thermophotovoltaic generation of electricity economical. These continuous combustion thermophotovoltaic units run quietly and cleanly. Applications include small scale distributed cogeneration of heat and electricity and power units for clean electric vehicles. ©1995 American Institute of Physics.

ISSN:0094-243X    

DOI:10.1063/1.47053

出版商:AIP    

年代:1995

数据来源: AIP

摘要:

Thermophotovoltaic (TPV) systems have potential applicability to residential and commercial gas furnaces that generate their own electric power. Two key requirements are high‐temperature, wavelength‐selective emitters that are durable and reliable, and low‐cost, PV cells designed for TPV. GRI‐supported research at the Tecogen Division of Thermo Power Corporation is progressing toward the development of a supported, continuous‐fiber structure that operates effectively at temperatures of 1400 °C–1800 °C and emits radiation selectively at wavelengths near the band‐gap of silicon PV cells. These structures also have potential in gas lighting and radiant burner applications. Tecogen has estimated the ultimate costs of its TPV system to be between $0.30 and $1.50 per watt. The costs depend strongly on the radiant intensity produced by the selective emitter and the cost and efficiency of the PV cells. Significant efficiency improvements and more evaluation are needed for using TPV in on‐site cogeneration. ©1995 American Institute of Physics.

ISSN:0094-243X    

DOI:10.1063/1.47057

出版商:AIP    

年代:1995

数据来源: AIP

摘要:

This is a tutorial paper, reviewing photovoltaic principles, and their application to thermophotovoltaic (TPV) power generators. The treatment is not rigorous, but is intended to give a working model for the workshop attendees. The options available to TPV converter designers are described to help in the optimization of all components of the TPV system. ©1995 American Institute of Physics.

ISSN:0094-243X    

DOI:10.1063/1.47058

出版商:AIP    

年代:1995

数据来源: AIP

摘要:

Many refractory oxide ceramics in fibrous form are efficient converters of the heat of combustion into radiant energy. Rare earth oxide ceramics, which are refractory and stable in flames, exhibit selective emission in the near IR where semiconductor photoconverters are efficient in converting radiant energy directly into electrical power. Ytterbia emitters and silicon photoconverters, in particular, constitute the basis for a high performance thermophotovoltaic energy conversion system. Ceramic fiber fabrication techniques are described that yield mechanically durable emitters in classical mantle geometries and in a novel planar form. This work has been supported by the Basic Research Group of the Gas Research Institute, Chicago, Illinois. ©1995 American Institute of Physics.

ISSN:0094-243X    

DOI:10.1063/1.47059

出版商:AIP    

年代:1995

数据来源: AIP