In this thesis we take single level two quantum dots connected in parallel between twornmetalic leads at di erent temperature and chemical potential which works as a heatrnengine. After calculating the current for the thermoelectric engine we evaluate otherrnthermodynamic quantities such as heat rnux, power and e ciency. We also study howrnour model behaves as a function of a quantity ( ) that characterizes the energy levelrndi erence between the two dots