Comparison of various high-temperature heat transfer medium
Comparison of various high-temperature heat transfer medium:
| Heat transfer medium | advantage | disadvantage |
| Water/steam | Economical and convenient,eliminating intermediate heat transfer. | High system pressure( above 10MPa),poor steam heat transfer performance |
| Thermal oil | Good flow performance, low freezing point, good heat transfer performance. | High-cost, long service life, low operation temperature，easy to leak and fire，pollution，high pressure |
| liquid metal | Good flow performance and heat transfer performance, high operation temperature and wide temperature range. | High –cost, strong corrosion, easy to leak, even fire and explode, poor safety performance. |
| Warm air | Economical and convenient, driving air motor directly, operation temperature reaching over 1000 ℃。 | Poor heat transfer performance, small heat capacity, heat dissipation causing temperature decline, and difficult to maintain high temperature. |
| Molten salt | Good heat transfer performance, low saturation steam pressure, large heat capacity, long service life, low-cost, safe and reliable system. | Easy to freeze and block up pipes, and some molten salt have corrosion for pipes. |
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