Nomenclature</h5> A cross-sectional area of the thermoelement, m 2 </P>D height of the thermoelement, m</P>E electric field intensity vector, V m −1 </P>I current, A</P>J electric current density vector, A m −2 </P>K e total thermal conductance, W K −1 </P>L total length of p- and n-thermoelements, m</P>L p length of p-type thermoelement, m</P>L n length of n-type thermoelement, m</P>P power, W</P>P max maximum power, W</P>q heat flux vector, W m −2 </P>q ˙ heat generation rate per unit volume, W m −3 </P>Q h heat inputted in the hot junction, W</P>R 0 external load resistance, Ω</P>R e total electrical resistance, Ω</P>R 0,opt optimal external load resistance, Ω</P>T 1 temperature of hot junction, K</P>T 2 temperature of cold junction, K</P>θ length ratio ( L p / L )</P>α e combined Seebeck coefficient, V K −1 </P>α p Seebeck coefficient of p-type thermoelement, V K −1 </P>α n Seebeck coefficient of n-type thermoelement, V K −1 </P>ρ p electrical resistivity of p-type thermoelement, Ω m</P>ρ n electrical resistivity of n-type thermoelement, Ω m</P>λ p thermal conductivity of p-type thermoelement, W m −1 K −1 </P>λ n thermal conductivity of n-type thermoelement, W m −1 K −1 </P>σ electrical conductivity,
Applied Thermal Engineering – Elsevier
Published: Mar 5, 2015
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