The boiling point of heat transfer oil is not a single fixed value but varies greatly depending on the specific composition and type of fluid. Different heat transfer oils are engineered for various operating temperature ranges and applications.
According to the provided reference:
Therminol 68 fluid is designed for use in nonpressurized/low- pressure, indirect heating systems. While Therminol 68 has a relatively high normal boiling point (308°C/586°F), the recommended maximum bulk (360°C/680°F) and film (390°C/ 735°F) temperatures are greater.
Based specifically on this reference, the boiling point for Therminol 68, a particular type of heat transfer fluid, is 308°C (586°F).
Key Temperature Points for Therminol 68
It's important to distinguish the boiling point from other critical temperatures for heat transfer fluids in a system. For Therminol 68, the reference provides:
- Normal Boiling Point: The temperature at which the liquid turns to vapor under standard atmospheric pressure.
- Maximum Recommended Bulk Temperature: The highest safe operating temperature for the main volume of the fluid in the system.
- Maximum Recommended Film Temperature: The highest safe temperature the fluid is exposed to at the heated surfaces (like inside tubes), where temperatures can be significantly higher than the bulk fluid temperature.
Here's a summary of the temperatures mentioned in the reference:
| Temperature Type | Value (°C) | Value (°F) |
|---|---|---|
| Normal Boiling Point | 308 | 586 |
| Maximum Recommended Bulk Temperature | 360 | 680 |
| Maximum Recommended Film Temperature | 390 | 735 |
Understanding these different temperature limits is crucial for the safe and efficient operation of a heat transfer system, preventing issues like fluid degradation or boiling which could lead to vapor lock or system damage. While 308°C is the boiling point of Therminol 68, the fluid is typically used at temperatures below its maximum recommended bulk and film temperatures to ensure longevity and stable performance.
