  We study the thermopower and some related transport quantities due to the
orbital Kondo effect in a single quantum dot system with a finite value of
Coulomb repulsion by means of the noncrossing approximation applied to the
multiorbital impurity Anderson model. It is elucidated how the asymmetry of the
renormalized tunneling resonance due to the two-orbital Kondo effect causes
characteristic behavior of the thermopower at finite temperatures under
gate-voltage and magnetic-field control, which is compared with that of the
ordinary spin Kondo effect.
