Hydrogen is favored over C02 as a superior coolant because the former_____________________?
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Answer: C. has high specific heat
Explanation
Hydrogen gas possesses an exceptionally high specific heat capacity compared to most other gases. This superior thermal property enables hydrogen to absorb and transfer large amounts of thermal energy. Its excellent heat transfer capabilities make it highly effective for cooling high-power electrical equipment. Specific heat capacity measures the thermal energy required to raise a substance unit mass temperature. Hydrogen also exhibits extremely low density and high thermal conductivity relative to carbon dioxide. These combined transport properties reduce windage losses in high-speed rotating electrical generators.
Large electrical turbine generators are routinely filled with hydrogen gas to maintain optimal operating temperatures. Using hydrogen improves overall generator efficiency and prevents overheating during continuous heavy power loads. Safety systems must carefully monitor and seal hydrogen-cooled installations to prevent explosive gas leaks. Being lighter is a physical characteristic but does not directly explain its superior thermal energy absorption. Being inert describes noble gases like helium rather than hydrogen, which can form explosive mixtures. Good electrical conductivity is incorrect because hydrogen acts as a thermal cooling fluid, not a conductor.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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