Energy Sources and Power Conversion

The movement of a spaceship requires energy, which makes the energy source a part of the propulsion system. This chapter explores the energy sources and power conversion methods that drive the high velocity mass flow discussed previously. Beginning with the simplest form, thermodynamic energy, used in cold-gas thruster, we then focus on chemical energy and solar-based power generation. The efficient and controlled release of chemical energy at a high rate, known as combustion, occurs in the combustion chamber. Electric propulsion systems, which require substantial electrical power (kW–MW), are also examined. Currently, the most significant method to power electric thrusters is solar energy utilization. The means to harvest solar power, through power generators, is the subject of the second part of this chapter.