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Title: Solid state radiative heat pump

Abstract

A solid state radiative heat pump operable at room temperature (300 K) utilizes a semiconductor having a gap energy in the range of 0.03-0.25 eV and operated reversibly to produce an excess or deficit of change carriers as compared equilibrium. In one form of the invention an infrared semiconductor photodiode is used, with forward or reverse bias, to emit an excess or deficit of infrared radiation. In another form of the invention, a homogenous semiconductor is subjected to orthogonal magnetic and electric fields to emit an excess or deficit of infrared radiation. Three methods of enhancing transmission of radiation the active surface of the semiconductor are disclosed. In one method, an anti-refection layer is coated into the active surface of the semiconductor, the anti-reflection layer having an index of refraction equal to the square root of that of the semiconductor. In the second method, a passive layer is speaced trom the active surface of the semiconductor by a submicron vacuum gap, the passive layer having an index of refractive equal to that of the semiconductor. In the third method, a coupler with a paraboloid reflecting surface surface is in contact with the active surface of the semiconductor, the coupler havingmore » an index of refraction about the same as that of the semiconductor.« less

Inventors:
Publication Date:
Research Org.:
Lawrence Berkeley Lab., CA (USA)
OSTI Identifier:
5726407
Application Number:
ON: DE85011605
Assignee:
Dept. of Energy EDB-85-085610
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; HEAT PUMPS; DESIGN; SEMICONDUCTOR DEVICES; PHOTODIODES; SEMICONDUCTOR DIODES; 320100* - Energy Conservation, Consumption, & Utilization- Buildings

Citation Formats

Berdahl, P.H. Solid state radiative heat pump. United States: N. p., 1984. Web.
Berdahl, P.H. Solid state radiative heat pump. United States.
Berdahl, P.H. Fri . "Solid state radiative heat pump". United States. doi:.
@article{osti_5726407,
title = {Solid state radiative heat pump},
author = {Berdahl, P.H.},
abstractNote = {A solid state radiative heat pump operable at room temperature (300 K) utilizes a semiconductor having a gap energy in the range of 0.03-0.25 eV and operated reversibly to produce an excess or deficit of change carriers as compared equilibrium. In one form of the invention an infrared semiconductor photodiode is used, with forward or reverse bias, to emit an excess or deficit of infrared radiation. In another form of the invention, a homogenous semiconductor is subjected to orthogonal magnetic and electric fields to emit an excess or deficit of infrared radiation. Three methods of enhancing transmission of radiation the active surface of the semiconductor are disclosed. In one method, an anti-refection layer is coated into the active surface of the semiconductor, the anti-reflection layer having an index of refraction equal to the square root of that of the semiconductor. In the second method, a passive layer is speaced trom the active surface of the semiconductor by a submicron vacuum gap, the passive layer having an index of refractive equal to that of the semiconductor. In the third method, a coupler with a paraboloid reflecting surface surface is in contact with the active surface of the semiconductor, the coupler having an index of refraction about the same as that of the semiconductor.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Sep 28 00:00:00 EDT 1984},
month = {Fri Sep 28 00:00:00 EDT 1984}
}