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S.1 Spacecraft Propulsion Systems Chapter 1: Introduction to ...

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S.4 Cold and Hot Gas <strong>Systems</strong><br />

- 7-<br />

Cold Gas <strong>Systems</strong> operate with propellants like compressed inert gas (e.g. nitrogen: N2) or<br />

high vapor pressure hydrocarbons (e.g. propane: C3H8).<br />

- Main performance<br />

- Advantages<br />

- Disadvantages<br />

- Conclusion<br />

Hot Gas <strong>Systems</strong> are the most common type of propulsion systems for space applications.<br />

They can be divided in<strong>to</strong> three basic categories defined by the physical state of the s<strong>to</strong>red<br />

propellants in the propulsion system.<br />

In contrast <strong>to</strong> compressed gas and vaporizing liquids, liquid propellants in hot gas<br />

systems need <strong>to</strong> be pressurized in the tank <strong>to</strong> feed the thrusters with propellant.<br />

These systems are called pressure-fed systems. Note

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