Part 8/11:
Refrigerant choice is equally important. The efficiency and stability of the refrigerant defined not only the system's capability but also its long-term durability. While Heaton utilizes custom hydrocarbons, Carmon may be employing alternative refrigerants to achieve its higher operational targets. Discussions in engineering circles suggest that innovations like the reverse Brayton cycle—capable of handling very high temperatures without changing phases—could play a significant role in their design.