Presents the fundamentals of thermophotovoltaic(TPV) energy conversion suitable for an upper undergraduate or first year graduate course. This textbook. Fundamentals of. THERMOPHOTOVOLTAIC. ENERGY. CONVERSION. Donald L. Chubb. NASA Glenn Research Center. Brookpark Road, MS Fundamentals of Thermophotovoltaic Energy Conversion von Donald Chubb ( ISBN ) online kaufen | Sofort-Download –

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The components of the system are the thermal source, the emitter and possibly a filterthe PV cells, and the waste heat rejection system.

Fundamentals of Thermophotovoltaic Energy Conversion – PDF Free Download

The undesirable feature of the embedded metal filter is the absorptance resulting from the gold layer. Then using equations 1. If power is being supplied Q! Reflectivity and transmissivity depend upon the indices of refraction, which are functions of wavelength and the angle of Chapter 1 56 incidence. Using a simplified model, Chapter 2 develops expressions for the maximum efficiency and power density for an ideal TPV system.

Convrsion discussed earlier, if media o is absorptive noI z 0then the intensity cannot be split into incident and reflected parts.

Combustion driven TPV has many potential commercial applications. Therefore, the wave propagates with enery phase velocity o and is attenuated n1R in the z direction with an absorption coefficient 2Z n1I co 4S n1I. Dogan, Materials Science and Engineering B83, But if the wave frequency increases wavelength decreases from Zcpthe reflectivity becomes less than one.

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The name blackbody derives from the observation that good absorbers of incident visible light appear black to the eye. The matrix equation [equation 4. Obviously, for TPV this is thermohpotovoltaic undesirable result since this long wavelength radiation cannot be converted to electrical energy by the PV array.

Fundamentals of Thermophotovoltaic Energy Conversion (eBook)

A fortuitous advantage of using alumina as the antireflective film is that it also can act as a barrier between the atmosphere and the tungsten emitter. Therefore, to achieve up d 0. The Pt and W data are fundsmentals [1] and the SiC data are from [2].

Consider the case where every other layer has the same index of refraction when m is an even integer. In addition, the emittance drops rapidly to H.

Fundamentals of Thermophotovoltaic Energy Conversion

Each layer, i, of the system is characterized by the matrix, Mi, given by equation 4. The 38 Chapter 1 spatial dependence of intensity is governed by a differential equation known as the equation of transfer or radiation transfer equation. However, all solid materials that emit a continuum of radiation rather than band conversioj show some selectivity in emission. Both p and s polarization must be considered.

Thus for the ideal TPV system described by equation 2. With the capability of hour-a-day operation, STPV is viable for electric utility use. D n1R and c E n1I. A numerical solution procedure is presented in Appendix B.

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However, to proceed further without having to solve the energy and source function equations, the no scattering and constant temperature approximations must be made. In that case equations 1. At this stage of development, it is impossible to say which applications will be cost effective.

As discussed in Section 3.

Fundamentals of Thermophotovoltaic Energy Conversion

Collisions with phonons quanta of lattice vibration, just as the photon is the quanta of electromagnetic vibration and collisions with the ionized impurity used to dope the semiconductor are the two major scattering mechanisms.

This is a violation of the second law of thermodynamics. The lanthanides or rare earths, as they are more thermophotovoptaic called, exist as singly and doubly converrsion ions when combined with other atoms at solid state densities. In this section consider so-called plasma filters that are made from conductors and semiconductors, which have both real and imaginary indices of refraction and thus are absorptive.

Therefore only if the medium temperature is a constant, can the intensity and source function be calculated from equations 1. In the range 0. The imaginary part, which determines the dissipation, is related to the medium absorption coefficient, a.

Also notice that the determinant of [Mi] is unity.