Abstract: A method and apparatus for harvesting energy in a fuel cell powered vehicle has first and second energy harvesting elements with at least two ends, the first end being electrically insulated from and in thermal communication with a high temperature reservoir associated with the fuel cell, the second end being electrically insulated from and in thermal communication with a low temperature reservoir associated with an exterior of the vehicle. The apparatus has particular utility for use in watercraft, specifically an underwater vehicle. The energy harvesting apparatus can include an electrical storage means for storing the energy harvested, and/or an electric load for consuming the energy harvested.

Abstract: A method and apparatus for harvesting energy in a fuel cell powered vehicle has first and second energy harvesting elements with at least two ends, the first end being electrically insulated from and in thermal communication with a high temperature reservoir associated with the fuel cell, the second end being electrically insulated from and in thermal communication with a low temperature reservoir associated with an exterior of the vehicle. The apparatus has particular utility for use in watercraft, specifically an underwater vehicle. The energy harvesting apparatus can include an electrical storage means for storing the energy harvested, and/or an electric load for consuming the energy harvested.

Abstract: In accordance with one embodiment, the present technique provides a combustor assembly for use in a gas-turbine device. The combustor assembly includes a first combustion zone and a second combustion zone. The combustor assembly further includes a first premix chamber configured to receive a fuel and air to facilitate a first fuel-air mixture having a first fuel-to-air ratio, wherein the first premix chamber is fluidiclly coupled to the combustion chamber at the first combustion zone. The combustor assembly also includes a second premix chamber configured to receive a fuel and air to facilitate a second fuel-air mixture having a second fuel-to-air ratio, wherein the second premix chamber is fluidiclly coupled to the combustion chamber at the second combustion zone, wherein the second combustion zone is radially outboard of the first combustion zone.