Innovative waste heat recovery systems in rotorcrafts

Abstract

Research in modern helicopters is targeted into the increase of their efficiency due to economical and ecological pressures. This paper introduces two innovative methods of absorbing a ratio of the energy remains of the main engine exhaust gases and converting it to electrical energy. The recovered power is then injected to the electrical bus of the helicopter through power electronics converters. The first one uses thermoelectric generators whereas the second one an electromechanical generator. Both of these systems are analyzed, candidate power converter configurations and topologies are depicted and the results of simulations using SABER are evaluated.Index terms-More electric aircraft, thermoelectric generator, supercapacitor, dc/dc step-up converters, ac/dc rectifiers, pfc converters I.

Incorporating power converters for energy saving marine applications

“…This is a clear advantage of TEG systems, since it produces smaller payback periods -compensating so the disadvantage of using over dimensioned inverters. A useful example on interfacing Seebeck elements to helicopter electric networks can be found in [22,23].…”

Research on Control Strategy of Super Capacitor Energy Storage System in Traction Elevator

“…With the development of new energy storage technology such as flywheel, superconductor, super capacitor, energy feedback technology based on energy storage device with super capacitor is widely used in the control of elevator energy saving [6][7][8][9][10][11][12][13][14]. Aiming at the shortcoming of fluctuation regenerative energy affects the power quality in energy feedback power grid, [6] proposes grid power optimization control to reduce the fluctuation of power grid and improve the power quality.…”

“…The method of traffic flow difference was introduced in [7] to determine the capacity of the super capacitor in elevator energy storage, and the control strategy under different energy state is studied. The structure and control strategy of super capacitor energy storage for elevator is analyzed in [8][9][10][11]. For imbalanced voltage of single capacitor, super capacitor voltage balancing strategy is proposed in [12] to prevent the voltage unbalance of influence system safety.…”